A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China
The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017,...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zou, Jianan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2019transfer abstract |
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| Schlagwörter: |
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| Umfang: |
13 |
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| Übergeordnetes Werk: |
Enthalten in: The internal pudendal artery turnover (IPAT) flap: A new, simple and reliable technique for perineal reconstruction - Nassar, M.K. ELSEVIER, 2021, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:197 ; year:2019 ; day:15 ; month:01 ; pages:1-13 ; extent:13 |
| Links: |
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| DOI / URN: |
10.1016/j.atmosenv.2018.10.015 |
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| Katalog-ID: |
ELV044924623 |
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| 245 | 1 | 0 | |a A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China |
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| 520 | |a The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. | ||
| 520 | |a The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. | ||
| 650 | 7 | |a Extinction coefficient |2 Elsevier | |
| 650 | 7 | |a Mie model |2 Elsevier | |
| 650 | 7 | |a Aerosol mass spectrometer |2 Elsevier | |
| 650 | 7 | |a Particle number concentrations |2 Elsevier | |
| 650 | 7 | |a Hygroscopic growth |2 Elsevier | |
| 700 | 1 | |a Yang, Shuanghong |4 oth | |
| 700 | 1 | |a Hu, Bo |4 oth | |
| 700 | 1 | |a Liu, Zirui |4 oth | |
| 700 | 1 | |a Gao, Wenkang |4 oth | |
| 700 | 1 | |a Xu, Hanbing |4 oth | |
| 700 | 1 | |a Du, Chaojie |4 oth | |
| 700 | 1 | |a Wei, Jie |4 oth | |
| 700 | 1 | |a Ma, Yongjing |4 oth | |
| 700 | 1 | |a Ji, Dongsheng |4 oth | |
| 700 | 1 | |a Wang, Yuesi |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Nassar, M.K. ELSEVIER |t The internal pudendal artery turnover (IPAT) flap: A new, simple and reliable technique for perineal reconstruction |d 2021 |g Amsterdam [u.a.] |w (DE-627)ELV00656139X |
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10.1016/j.atmosenv.2018.10.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000886.pica (DE-627)ELV044924623 (ELSEVIER)S1352-2310(18)30705-2 DE-627 ger DE-627 rakwb eng 610 VZ 44.65 bkl Zou, Jianan verfasserin aut A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China 2019transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. Extinction coefficient Elsevier Mie model Elsevier Aerosol mass spectrometer Elsevier Particle number concentrations Elsevier Hygroscopic growth Elsevier Yang, Shuanghong oth Hu, Bo oth Liu, Zirui oth Gao, Wenkang oth Xu, Hanbing oth Du, Chaojie oth Wei, Jie oth Ma, Yongjing oth Ji, Dongsheng oth Wang, Yuesi oth Enthalten in Elsevier Science Nassar, M.K. ELSEVIER The internal pudendal artery turnover (IPAT) flap: A new, simple and reliable technique for perineal reconstruction 2021 Amsterdam [u.a.] (DE-627)ELV00656139X volume:197 year:2019 day:15 month:01 pages:1-13 extent:13 https://doi.org/10.1016/j.atmosenv.2018.10.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.65 Chirurgie VZ AR 197 2019 15 0115 1-13 13 |
| spelling |
10.1016/j.atmosenv.2018.10.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000886.pica (DE-627)ELV044924623 (ELSEVIER)S1352-2310(18)30705-2 DE-627 ger DE-627 rakwb eng 610 VZ 44.65 bkl Zou, Jianan verfasserin aut A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China 2019transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. Extinction coefficient Elsevier Mie model Elsevier Aerosol mass spectrometer Elsevier Particle number concentrations Elsevier Hygroscopic growth Elsevier Yang, Shuanghong oth Hu, Bo oth Liu, Zirui oth Gao, Wenkang oth Xu, Hanbing oth Du, Chaojie oth Wei, Jie oth Ma, Yongjing oth Ji, Dongsheng oth Wang, Yuesi oth Enthalten in Elsevier Science Nassar, M.K. ELSEVIER The internal pudendal artery turnover (IPAT) flap: A new, simple and reliable technique for perineal reconstruction 2021 Amsterdam [u.a.] (DE-627)ELV00656139X volume:197 year:2019 day:15 month:01 pages:1-13 extent:13 https://doi.org/10.1016/j.atmosenv.2018.10.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.65 Chirurgie VZ AR 197 2019 15 0115 1-13 13 |
| allfields_unstemmed |
10.1016/j.atmosenv.2018.10.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000886.pica (DE-627)ELV044924623 (ELSEVIER)S1352-2310(18)30705-2 DE-627 ger DE-627 rakwb eng 610 VZ 44.65 bkl Zou, Jianan verfasserin aut A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China 2019transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. Extinction coefficient Elsevier Mie model Elsevier Aerosol mass spectrometer Elsevier Particle number concentrations Elsevier Hygroscopic growth Elsevier Yang, Shuanghong oth Hu, Bo oth Liu, Zirui oth Gao, Wenkang oth Xu, Hanbing oth Du, Chaojie oth Wei, Jie oth Ma, Yongjing oth Ji, Dongsheng oth Wang, Yuesi oth Enthalten in Elsevier Science Nassar, M.K. ELSEVIER The internal pudendal artery turnover (IPAT) flap: A new, simple and reliable technique for perineal reconstruction 2021 Amsterdam [u.a.] (DE-627)ELV00656139X volume:197 year:2019 day:15 month:01 pages:1-13 extent:13 https://doi.org/10.1016/j.atmosenv.2018.10.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.65 Chirurgie VZ AR 197 2019 15 0115 1-13 13 |
| allfieldsGer |
10.1016/j.atmosenv.2018.10.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000886.pica (DE-627)ELV044924623 (ELSEVIER)S1352-2310(18)30705-2 DE-627 ger DE-627 rakwb eng 610 VZ 44.65 bkl Zou, Jianan verfasserin aut A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China 2019transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. Extinction coefficient Elsevier Mie model Elsevier Aerosol mass spectrometer Elsevier Particle number concentrations Elsevier Hygroscopic growth Elsevier Yang, Shuanghong oth Hu, Bo oth Liu, Zirui oth Gao, Wenkang oth Xu, Hanbing oth Du, Chaojie oth Wei, Jie oth Ma, Yongjing oth Ji, Dongsheng oth Wang, Yuesi oth Enthalten in Elsevier Science Nassar, M.K. ELSEVIER The internal pudendal artery turnover (IPAT) flap: A new, simple and reliable technique for perineal reconstruction 2021 Amsterdam [u.a.] (DE-627)ELV00656139X volume:197 year:2019 day:15 month:01 pages:1-13 extent:13 https://doi.org/10.1016/j.atmosenv.2018.10.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.65 Chirurgie VZ AR 197 2019 15 0115 1-13 13 |
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10.1016/j.atmosenv.2018.10.015 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000886.pica (DE-627)ELV044924623 (ELSEVIER)S1352-2310(18)30705-2 DE-627 ger DE-627 rakwb eng 610 VZ 44.65 bkl Zou, Jianan verfasserin aut A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China 2019transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. Extinction coefficient Elsevier Mie model Elsevier Aerosol mass spectrometer Elsevier Particle number concentrations Elsevier Hygroscopic growth Elsevier Yang, Shuanghong oth Hu, Bo oth Liu, Zirui oth Gao, Wenkang oth Xu, Hanbing oth Du, Chaojie oth Wei, Jie oth Ma, Yongjing oth Ji, Dongsheng oth Wang, Yuesi oth Enthalten in Elsevier Science Nassar, M.K. ELSEVIER The internal pudendal artery turnover (IPAT) flap: A new, simple and reliable technique for perineal reconstruction 2021 Amsterdam [u.a.] (DE-627)ELV00656139X volume:197 year:2019 day:15 month:01 pages:1-13 extent:13 https://doi.org/10.1016/j.atmosenv.2018.10.015 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.65 Chirurgie VZ AR 197 2019 15 0115 1-13 13 |
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After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. 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A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China |
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The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. |
| abstractGer |
The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. |
| abstract_unstemmed |
The extinction coefficient of aerosol will directly affect the atmospheric visibility, which is influenced by many factors such as aerosol of particle number concentration distribution, chemical composition, relative humidity (RH) and so on. During the period between 25 August and 05 September 2017, the physical and chemical characteristics of aerosol were measured to explore the effect of those factors on the extinction coefficient in Beijing during four environmental conditions (heavy pollution (HP); light pollution (LP); clean (CL); and rainy (RA)). After the new particle formation events during CL2, the ratio of particle number concentrations in the Accumulation mode (Acc) and Aitken mode (Ait) gradually grew from 0.2 (CL2) to 0.7 (LP1), 0.9 (HP) and 0.8 (LP2). The contributions of particle number concentrations to the extinction coefficient were 0.1% (0.1%), 10.5% (1.4%) and 89.4% (98.5%) in the Nucleation mode (Nuc), Ait and Acc, respectively, during CL1 (HP), which revealed that particles with an extinction function were mainly in Acc, especially during polluted days (PDs). The mass percentage of secondary inorganic aerosol (nitrate, sulfate and ammonium) with a greater hydrophilic characteristic was just 12.8% during clean days (CDs), while this rapidly increased to 56.5% during PDs, which was the main reason for the increase in the extinction coefficient. The sensitivity test of the extinction coefficient calculated using different refractive indices indicated that using the refractive index of the average value of a long observation would cause an underestimation of the extinction coefficient. The hygroscopic factors of the aerosol scattering coefficient (f(RH)) were 1.13, 1.59, 1.49 and 1.62 during CL2, LP1, HP and LP2, when RH = 80.0%, respectively. The extinction coefficients calculated by the κ-AMS-BC-Mie model and measured by the sum of the scattering and absorption coefficients were 675.7 and 521.2 Mm−1 under dry conditions during HP, while those values were 855.7 and 661.7 Mm−1 after correcting for RH. When the hygroscopic growth factor (GF) reached 1.1, the range of f(RH) was approximately 1.30–1.38 during all campaigns. Therefore, on PDs with high RH, aerosol with a greater number of hygroscopic components, which are mainly distributed in Acc, will produce a much larger extinction coefficient. |
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GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA |
| title_short |
A closure study of aerosol optical properties as a function of RH using a κ-AMS-BC-Mie model in Beijing, China |
| url |
https://doi.org/10.1016/j.atmosenv.2018.10.015 |
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| author2 |
Yang, Shuanghong Hu, Bo Liu, Zirui Gao, Wenkang Xu, Hanbing Du, Chaojie Wei, Jie Ma, Yongjing Ji, Dongsheng Wang, Yuesi |
| author2Str |
Yang, Shuanghong Hu, Bo Liu, Zirui Gao, Wenkang Xu, Hanbing Du, Chaojie Wei, Jie Ma, Yongjing Ji, Dongsheng Wang, Yuesi |
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| doi_str |
10.1016/j.atmosenv.2018.10.015 |
| up_date |
2024-07-06T22:46:05.046Z |
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