Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data

Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicle...
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Autor*in:	Li, Zhengqiang [verfasserIn] Li, Lei Zhang, Fengxia Li, Donghui Xie, Yisong Xu, Hua

Format:	Artikel
Sprache:	Englisch

Erschienen:	2015

Rechteinformationen:	Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved.

Schlagwörter:	atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols

Übergeordnetes Werk:	Enthalten in: Journal of geophysical research / D - Washington, DC : Union, 1984, 120(2015), 4, Seite 1520-1535
Übergeordnetes Werk:	volume:120 ; year:2015 ; number:4 ; pages:1520-1535

Links:	Volltext Link aufrufen Link aufrufen

DOI / URN:	10.1002/2014JD022593

Katalog-ID:	OLC1957056029

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520			\|a Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities
540			\|a Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved.
650		4	\|a atmospheric aerosols
650		4	\|a remote Sensing
650		4	\|a aerosol component composition
650		4	\|a Physical properties
650		4	\|a Remote sensing
650		4	\|a Meteorology
650		4	\|a Atmospheric aerosols
700	1		\|a Li, Lei \|4 oth
700	1		\|a Zhang, Fengxia \|4 oth
700	1		\|a Li, Donghui \|4 oth
700	1		\|a Xie, Yisong \|4 oth
700	1		\|a Xu, Hua \|4 oth
773	0	8	\|i Enthalten in \|t Journal of geophysical research / D \|d Washington, DC : Union, 1984 \|g 120(2015), 4, Seite 1520-1535 \|w (DE-627)130444391 \|w (DE-600)710256-2 \|w (DE-576)015978818 \|x 2169-897X \|7 nnns
773	1	8	\|g volume:120 \|g year:2015 \|g number:4 \|g pages:1520-1535
856	4	1	\|u http://dx.doi.org/10.1002/2014JD022593 \|3 Volltext
856	4	2	\|u http://onlinelibrary.wiley.com/doi/10.1002/2014JD022593/abstract
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allfields	10.1002/2014JD022593 doi PQ20160617 (DE-627)OLC1957056029 (DE-599)GBVOLC1957056029 (PRQ)c2509-cc1575bfdd82298e0fd9e05139a37049aa4a815b461af92972dd551122d1cec80 (KEY)0137985220150000120000401520comparisonofaerosolpropertiesoverbeijingandkanpuro DE-627 ger DE-627 rakwb eng 550 DNB Li, Zhengqiang verfasserin aut Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols Li, Lei oth Zhang, Fengxia oth Li, Donghui oth Xie, Yisong oth Xu, Hua oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 4, Seite 1520-1535 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:4 pages:1520-1535 http://dx.doi.org/10.1002/2014JD022593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD022593/abstract http://search.proquest.com/docview/1663769128 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 4 1520-1535
spelling	10.1002/2014JD022593 doi PQ20160617 (DE-627)OLC1957056029 (DE-599)GBVOLC1957056029 (PRQ)c2509-cc1575bfdd82298e0fd9e05139a37049aa4a815b461af92972dd551122d1cec80 (KEY)0137985220150000120000401520comparisonofaerosolpropertiesoverbeijingandkanpuro DE-627 ger DE-627 rakwb eng 550 DNB Li, Zhengqiang verfasserin aut Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols Li, Lei oth Zhang, Fengxia oth Li, Donghui oth Xie, Yisong oth Xu, Hua oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 4, Seite 1520-1535 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:4 pages:1520-1535 http://dx.doi.org/10.1002/2014JD022593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD022593/abstract http://search.proquest.com/docview/1663769128 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 4 1520-1535
allfields_unstemmed	10.1002/2014JD022593 doi PQ20160617 (DE-627)OLC1957056029 (DE-599)GBVOLC1957056029 (PRQ)c2509-cc1575bfdd82298e0fd9e05139a37049aa4a815b461af92972dd551122d1cec80 (KEY)0137985220150000120000401520comparisonofaerosolpropertiesoverbeijingandkanpuro DE-627 ger DE-627 rakwb eng 550 DNB Li, Zhengqiang verfasserin aut Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols Li, Lei oth Zhang, Fengxia oth Li, Donghui oth Xie, Yisong oth Xu, Hua oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 4, Seite 1520-1535 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:4 pages:1520-1535 http://dx.doi.org/10.1002/2014JD022593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD022593/abstract http://search.proquest.com/docview/1663769128 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 4 1520-1535
allfieldsGer	10.1002/2014JD022593 doi PQ20160617 (DE-627)OLC1957056029 (DE-599)GBVOLC1957056029 (PRQ)c2509-cc1575bfdd82298e0fd9e05139a37049aa4a815b461af92972dd551122d1cec80 (KEY)0137985220150000120000401520comparisonofaerosolpropertiesoverbeijingandkanpuro DE-627 ger DE-627 rakwb eng 550 DNB Li, Zhengqiang verfasserin aut Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols Li, Lei oth Zhang, Fengxia oth Li, Donghui oth Xie, Yisong oth Xu, Hua oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 4, Seite 1520-1535 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:4 pages:1520-1535 http://dx.doi.org/10.1002/2014JD022593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD022593/abstract http://search.proquest.com/docview/1663769128 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 4 1520-1535
allfieldsSound	10.1002/2014JD022593 doi PQ20160617 (DE-627)OLC1957056029 (DE-599)GBVOLC1957056029 (PRQ)c2509-cc1575bfdd82298e0fd9e05139a37049aa4a815b461af92972dd551122d1cec80 (KEY)0137985220150000120000401520comparisonofaerosolpropertiesoverbeijingandkanpuro DE-627 ger DE-627 rakwb eng 550 DNB Li, Zhengqiang verfasserin aut Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols Li, Lei oth Zhang, Fengxia oth Li, Donghui oth Xie, Yisong oth Xu, Hua oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 4, Seite 1520-1535 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:4 pages:1520-1535 http://dx.doi.org/10.1002/2014JD022593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD022593/abstract http://search.proquest.com/docview/1663769128 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 4 1520-1535
language	English
source	Enthalten in Journal of geophysical research / D 120(2015), 4, Seite 1520-1535 volume:120 year:2015 number:4 pages:1520-1535
sourceStr	Enthalten in Journal of geophysical research / D 120(2015), 4, Seite 1520-1535 volume:120 year:2015 number:4 pages:1520-1535
format_phy_str_mv	Article
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topic_facet	atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols
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authorswithroles_txt_mv	Li, Zhengqiang @@aut@@ Li, Lei @@oth@@ Zhang, Fengxia @@oth@@ Li, Donghui @@oth@@ Xie, Yisong @@oth@@ Xu, Hua @@oth@@
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author	Li, Zhengqiang
spellingShingle	Li, Zhengqiang ddc 550 misc atmospheric aerosols misc remote Sensing misc aerosol component composition misc Physical properties misc Remote sensing misc Meteorology misc Atmospheric aerosols Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data
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topic_title	550 DNB Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data atmospheric aerosols remote Sensing aerosol component composition Physical properties Remote sensing Meteorology Atmospheric aerosols
topic	ddc 550 misc atmospheric aerosols misc remote Sensing misc aerosol component composition misc Physical properties misc Remote sensing misc Meteorology misc Atmospheric aerosols
topic_unstemmed	ddc 550 misc atmospheric aerosols misc remote Sensing misc aerosol component composition misc Physical properties misc Remote sensing misc Meteorology misc Atmospheric aerosols
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title	Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data
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title_full	Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data
author_sort	Li, Zhengqiang
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doi_str_mv	10.1002/2014JD022593
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title_sort	comparison of aerosol properties over beijing and kanpur: optical, physical properties and aerosol component composition retrieved from 12 years ground‐based sun‐sky radiometer remote sensing data
title_auth	Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data
abstract	Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities
abstractGer	Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities
abstract_unstemmed	Aerosol mixtures composed of coarse and fine particles occur frequently in metropolitan areas in the world, especially in developing countries. Beijing, China, and Kanpur, India, are both in Asian monsoon regions and experience strong aerosol loading because of increased economic activities, vehicles, and urbanization. Observations originating from the Aerosol Robotic Network (AERONET) have played a vital role in the field of aerosol study. In order to understand the variations of aerosol optical, physical properties and component composition over Beijing and Kanpur, we focus on AERONET measurements collected at these two sites from 2002 to 2013 and employ a five‐component (including black carbon, BC; mineral dust, DU; brown carbon, BrC; ammonium sulfate like, AS; and aerosol water content, AW) aerosol mixture model to retrieve the aerosol component composition. Particle size distribution, spectral characteristics of single‐scattering albedo, and refractive indices of the aerosols over Beijing and Kanpur are found to be distinct and with regular seasonal variations. Correspondingly, aerosol components show distinct temporal characteristics at both sites. In Beijing, BC shows a significant decrease from 2002 to 2013 (especially after 2007) with an average declining rate of 0.69 mg m −2 yr −1 . Among the five components, BC and BrC are higher during winter and autumn especially at Beijing, while DU and AS are higher during spring and summer at the two sites. With respect to site differences, BC and BrC are usually higher in Beijing in most of the year, while DU and AS are higher in Kanpur especially from April to June. Moreover, AW is similar and quite comparable at two sites. Beijing's BC has a decrease trend since 2007 while Kanpur's BC has no decrease Beijing's BrC is higher during winter distinguished from that of Kanpur Dusts are significant aerosol components during spring in both cities
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container_issue	4
title_short	Comparison of aerosol properties over Beijing and Kanpur: Optical, physical properties and aerosol component composition retrieved from 12 years ground‐based Sun‐sky radiometer remote sensing data
url	http://dx.doi.org/10.1002/2014JD022593 http://onlinelibrary.wiley.com/doi/10.1002/2014JD022593/abstract http://search.proquest.com/docview/1663769128
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author2	Li, Lei Zhang, Fengxia Li, Donghui Xie, Yisong Xu, Hua
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up_date	2024-07-03T23:00:19.093Z
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