Investigation of noctilucent cloud properties and their connection with solar activity

Atmospheric physics; mesosphere; clouds; solar activity. - Noctilucent clouds (NLC) are optically thin layers of water ice particles present near the summer mesopause at high latitudes. Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ... Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Robert, Charles [verfasserIn]
Hochschulschrift:	Bremen, Univ., Diss., 2010

Format:	E-Book
Sprache:	Englisch

Erschienen:	2010

Formangabe:	Hochschulschrift

Umfang:	Online-Ressource (PDF-Datei: 174 S., 34 MB)

Weitere Ausgabe:	Erscheint auch als Druck-Ausgabe Robert, Charles: Investigation of noctilucent cloud properties and their connection with solar activity - 2010

Links:	Link aufrufen Volltext Volltext Volltext

DOI / URN:	urn:nbn:de:gbv:46-00101757-19

Katalog-ID:	641595689

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Indexfelder

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Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ... 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spelling	11,O02 dnb 1009437100 DE-101 urn:nbn:de:gbv:46-00101757-19 urn (DE-627)641595689 (DE-599)GBV641595689 (OCoLC)701044126 DE-627 ger DE-627 rakwb eng XA-DE 551.514 OCLC 22/ger 550 DNB Robert, Charles verfasserin aut Investigation of noctilucent cloud properties and their connection with solar activity von Charles Robert 2010 Online-Ressource (PDF-Datei: 174 S., 34 MB) Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bremen, Univ., Diss., 2010 Atmospheric physics; mesosphere; clouds; solar activity. - Noctilucent clouds (NLC) are optically thin layers of water ice particles present near the summer mesopause at high latitudes. Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ... Langzeitarchivierung gewährleistet pdager atmospheric physics; mesosphere; clouds; solar activity Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Bremen uvp Erscheint auch als Druck-Ausgabe Robert, Charles Investigation of noctilucent cloud properties and their connection with solar activity 2010 174 S (DE-627)641595492 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 Resolving-System Volltext http://d-nb.info/1009437100/34 Langzeitarchivierung Nationalbibliothek Volltext http://elib.suub.uni-bremen.de/edocs/00101757-1.pdf application/pdf Verlag kostenfrei Volltext GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP SSG-OPC-AST SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 BO 045F 551.514 20 01 0084 1231849339 x 10-03-11 21 01 0046 1205724664 ebook_2010_dissbremen zza 13-12-10 22 01 0018 1236493184 SUBolrd xu 06-04-11 23 01 0830 1236596013 olr-d x 06-04-11 30 01 0104 1236645170 z 06-04-11 40 01 0007 1236685474 xsn 06-04-11 60 01 0705 1236743474 OLRD z 06-04-11 63 01 3401 1595704620 ORD x 21-01-16 70 01 0089 1236830911 zdo 06-04-11 105 01 0841 1596517859 z 21-01-16 110 01 3110 1236793676 x 06-04-11 132 01 0959 1497614244 OLR-DISS x 11-08-14 151 01 0546 3594121445 OLR-ODISS z 13-02-20 161 01 0960 1597473790 ORD x 28-01-16 293 01 3293 1597917702 ORD xf 28-01-16 370 01 4370 1236814290 x 06-04-11 21 01 0046 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 LF 22 01 0018 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 23 01 0830 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 30 01 0104 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 40 01 0007 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 60 01 0705 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 63 01 3401 E-Book http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 LF 70 01 0089 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 105 01 0841 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 110 01 3110 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 132 01 0959 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 151 01 0546 Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 161 01 0960 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 293 01 3293 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 370 01 4370 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 21 00 DE-46 99 93 40 00 DE-7 00 (DE-627)623602350 TGC 900 Solar-terrestrische Erscheinungen {Astronomie} 40 00 DE-7 01 (DE-627)623602180 TGC 500 Sonnenaktivität {Astronomie} 40 00 DE-7 02 (DE-627)623608529 TVM 530 Kondensationserscheinungen {Meteorologie} 60 01 0705 10 ho 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2010_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2011-04-06:03:11:10
allfields_unstemmed	11,O02 dnb 1009437100 DE-101 urn:nbn:de:gbv:46-00101757-19 urn (DE-627)641595689 (DE-599)GBV641595689 (OCoLC)701044126 DE-627 ger DE-627 rakwb eng XA-DE 551.514 OCLC 22/ger 550 DNB Robert, Charles verfasserin aut Investigation of noctilucent cloud properties and their connection with solar activity von Charles Robert 2010 Online-Ressource (PDF-Datei: 174 S., 34 MB) Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bremen, Univ., Diss., 2010 Atmospheric physics; mesosphere; clouds; solar activity. - Noctilucent clouds (NLC) are optically thin layers of water ice particles present near the summer mesopause at high latitudes. Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ... Langzeitarchivierung gewährleistet pdager atmospheric physics; mesosphere; clouds; solar activity Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Bremen uvp Erscheint auch als Druck-Ausgabe Robert, Charles Investigation of noctilucent cloud properties and their connection with solar activity 2010 174 S (DE-627)641595492 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 Resolving-System Volltext http://d-nb.info/1009437100/34 Langzeitarchivierung Nationalbibliothek Volltext http://elib.suub.uni-bremen.de/edocs/00101757-1.pdf application/pdf Verlag kostenfrei Volltext GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP SSG-OPC-AST SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 BO 045F 551.514 20 01 0084 1231849339 x 10-03-11 21 01 0046 1205724664 ebook_2010_dissbremen zza 13-12-10 22 01 0018 1236493184 SUBolrd xu 06-04-11 23 01 0830 1236596013 olr-d x 06-04-11 30 01 0104 1236645170 z 06-04-11 40 01 0007 1236685474 xsn 06-04-11 60 01 0705 1236743474 OLRD z 06-04-11 63 01 3401 1595704620 ORD x 21-01-16 70 01 0089 1236830911 zdo 06-04-11 105 01 0841 1596517859 z 21-01-16 110 01 3110 1236793676 x 06-04-11 132 01 0959 1497614244 OLR-DISS x 11-08-14 151 01 0546 3594121445 OLR-ODISS z 13-02-20 161 01 0960 1597473790 ORD x 28-01-16 293 01 3293 1597917702 ORD xf 28-01-16 370 01 4370 1236814290 x 06-04-11 21 01 0046 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 LF 22 01 0018 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 23 01 0830 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 30 01 0104 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 40 01 0007 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 60 01 0705 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 63 01 3401 E-Book http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 LF 70 01 0089 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 105 01 0841 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 110 01 3110 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 132 01 0959 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 151 01 0546 Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 161 01 0960 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 293 01 3293 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 370 01 4370 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 21 00 DE-46 99 93 40 00 DE-7 00 (DE-627)623602350 TGC 900 Solar-terrestrische Erscheinungen {Astronomie} 40 00 DE-7 01 (DE-627)623602180 TGC 500 Sonnenaktivität {Astronomie} 40 00 DE-7 02 (DE-627)623608529 TVM 530 Kondensationserscheinungen {Meteorologie} 60 01 0705 10 ho 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2010_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2011-04-06:03:11:10
allfieldsGer	11,O02 dnb 1009437100 DE-101 urn:nbn:de:gbv:46-00101757-19 urn (DE-627)641595689 (DE-599)GBV641595689 (OCoLC)701044126 DE-627 ger DE-627 rakwb eng XA-DE 551.514 OCLC 22/ger 550 DNB Robert, Charles verfasserin aut Investigation of noctilucent cloud properties and their connection with solar activity von Charles Robert 2010 Online-Ressource (PDF-Datei: 174 S., 34 MB) Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bremen, Univ., Diss., 2010 Atmospheric physics; mesosphere; clouds; solar activity. - Noctilucent clouds (NLC) are optically thin layers of water ice particles present near the summer mesopause at high latitudes. Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ... 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Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ... Langzeitarchivierung gewährleistet pdager atmospheric physics; mesosphere; clouds; solar activity Hochschulschrift (DE-588)4113937-9 (DE-627)105825778 (DE-576)209480580 gnd-content Bremen uvp Erscheint auch als Druck-Ausgabe Robert, Charles Investigation of noctilucent cloud properties and their connection with solar activity 2010 174 S (DE-627)641595492 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 Resolving-System Volltext http://d-nb.info/1009437100/34 Langzeitarchivierung Nationalbibliothek Volltext http://elib.suub.uni-bremen.de/edocs/00101757-1.pdf application/pdf Verlag kostenfrei Volltext GBV-ODiss GBV_ILN_20 ISIL_DE-84 SYSFLAG_1 GBV_KXP SSG-OPC-AST SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_21 ISIL_DE-46 GBV_ILN_22 ISIL_DE-18 GBV_ILN_23 ISIL_DE-830 GBV_ILN_30 ISIL_DE-104 GBV_ILN_40 ISIL_DE-7 GBV_ILN_60 ISIL_DE-705 GBV_ILN_63 ISIL_DE-Wim2 GBV_ILN_70 ISIL_DE-89 GBV_ILN_105 ISIL_DE-841 GBV_ILN_110 ISIL_DE-Luen4 GBV_ILN_132 ISIL_DE-959 GBV_ILN_151 ISIL_DE-546 GBV_ILN_161 ISIL_DE-960 GBV_ILN_293 ISIL_DE-960-3 GBV_ILN_370 ISIL_DE-1373 BO 045F 551.514 20 01 0084 1231849339 x 10-03-11 21 01 0046 1205724664 ebook_2010_dissbremen zza 13-12-10 22 01 0018 1236493184 SUBolrd xu 06-04-11 23 01 0830 1236596013 olr-d x 06-04-11 30 01 0104 1236645170 z 06-04-11 40 01 0007 1236685474 xsn 06-04-11 60 01 0705 1236743474 OLRD z 06-04-11 63 01 3401 1595704620 ORD x 21-01-16 70 01 0089 1236830911 zdo 06-04-11 105 01 0841 1596517859 z 21-01-16 110 01 3110 1236793676 x 06-04-11 132 01 0959 1497614244 OLR-DISS x 11-08-14 151 01 0546 3594121445 OLR-ODISS z 13-02-20 161 01 0960 1597473790 ORD x 28-01-16 293 01 3293 1597917702 ORD xf 28-01-16 370 01 4370 1236814290 x 06-04-11 21 01 0046 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 LF 22 01 0018 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 23 01 0830 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 30 01 0104 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 40 01 0007 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 60 01 0705 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 63 01 3401 E-Book http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 LF 70 01 0089 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 105 01 0841 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 110 01 3110 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 132 01 0959 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 151 01 0546 Volltext http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 161 01 0960 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 293 01 3293 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 370 01 4370 http://nbn-resolving.de/urn:nbn:de:gbv:46-00101757-19 21 00 DE-46 99 93 40 00 DE-7 00 (DE-627)623602350 TGC 900 Solar-terrestrische Erscheinungen {Astronomie} 40 00 DE-7 01 (DE-627)623602180 TGC 500 Sonnenaktivität {Astronomie} 40 00 DE-7 02 (DE-627)623608529 TVM 530 Kondensationserscheinungen {Meteorologie} 60 01 0705 10 ho 110 01 3110 OLRD 370 01 4370 OLRD 21 01 0046 ebook_2010_dissbremen 22 01 0018 SUBolrd 23 01 0830 olr-d 60 01 0705 OLRD 63 01 3401 ORD 132 01 0959 OLR-DISS 151 01 0546 OLR-ODISS 161 01 0960 ORD 293 01 3293 ORD 23 01 0830 2011-04-06:03:11:10
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Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. 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spellingShingle	Robert, Charles ddc 551.514 ddc 550 misc atmospheric physics; mesosphere; clouds; solar activity Investigation of noctilucent cloud properties and their connection with solar activity
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title_full	Investigation of noctilucent cloud properties and their connection with solar activity von Charles Robert
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title_sort	investigation of noctilucent cloud properties and their connection with solar activity
title_auth	Investigation of noctilucent cloud properties and their connection with solar activity
abstract	Atmospheric physics; mesosphere; clouds; solar activity. - Noctilucent clouds (NLC) are optically thin layers of water ice particles present near the summer mesopause at high latitudes. Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ...
abstractGer	Atmospheric physics; mesosphere; clouds; solar activity. - Noctilucent clouds (NLC) are optically thin layers of water ice particles present near the summer mesopause at high latitudes. Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ...
abstract_unstemmed	Atmospheric physics; mesosphere; clouds; solar activity. - Noctilucent clouds (NLC) are optically thin layers of water ice particles present near the summer mesopause at high latitudes. Because of their extraordinary height of about 83km, they can become visible to the naked eye when the sun sinks between 6 and 16 degrees below the horizon, providing a dazzling display of bluish light. The observation of NLC conveys unique information concerning the different processes taking place in the upper mesosphere. Since NLC are extremely sensitive to changes in temperature and water vapor content, it is possible, by studying the variation of NLC properties on different timescales, to gain insights into the various atmospheric processes in action near the summer mesopause. Understanding which physical mechanisms are important for this region of the atmosphere is also crucial for quantifying the possible change in NLC properties which could be attributed to anthropogenic activity.The purpose of this thesis is to analyze NLC properties measured from the space-borne SCanning Imaging Absorption spectroMeter for Atmospheric ChartograpHY (SCIAMACHY) instrument. Limb observations of NLC scattered sunlight, in the spectral range 264-300 nm, are exploited for the retrieval of NLC occurrence, radiance, and altitude. The good spectral resolution of the instrument also permits the determination of the NLC particle size, provided assumptions are made on the particle shape and size distribution. The modeling of the particle scattering is based on the T-matrix approach. The NLC particle size can only be unambiguously retrieved in the northern hemisphere due to the particular geometry of observation. A climatology of NLC occurrence frequency, radiance, altitude, and particle size is presented for years 2002-2009 and for both hemispheres. The seasonal variations of NLC properties are in good agreement with independent data sets. It is also shown that despite the coarse vertical resolution of SCIAMACHY, the daily NLC altitudes correlate well with the supersaturation levels, especially in the northern hemisphere. SCIAMACHY's global coverage grants the possibility of observing the response of NLC activity linked to various atmospheric phenomena such as the solar proton events, planetary waves, and the zonal dependence of gravity wave forcing. The dependence of the NLC particle size on latitude, local time, and altitude is also investigated. It is shown that the NLC particle radii ...
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title_short	Investigation of noctilucent cloud properties and their connection with solar activity
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Investigation of noctilucent cloud properties and their connection with solar activity

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