Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect
International audience Statistical analyses of data from 14 ground-based sun photometer stations all over Central Europe are presented. All stations are part of the Aerosol Robotic Network (AERONET), and only data of the highest data quality level 2.0 had been applied. The averages by weekday of aer...
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ftccsdartic:oai:HAL:hal-00303031v1 2023-11-12T03:59:48+01:00 Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect Bäumer, D. Rinke, R. Vogel, B. Institute for Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology (KIT) 2007-08-06 https://hal.science/hal-00303031 https://hal.science/hal-00303031/document https://hal.science/hal-00303031/file/acpd-7-11545-2007.pdf en eng HAL CCSD European Geosciences Union hal-00303031 https://hal.science/hal-00303031 https://hal.science/hal-00303031/document https://hal.science/hal-00303031/file/acpd-7-11545-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00303031 Atmospheric Chemistry and Physics Discussions, 2007, 7 (4), pp.11545-11560 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2023-10-21T23:11:51Z International audience Statistical analyses of data from 14 ground-based sun photometer stations all over Central Europe are presented. All stations are part of the Aerosol Robotic Network (AERONET), and only data of the highest data quality level 2.0 had been applied. The averages by weekday of aerosol optical thickness (AOT) at a wavelength of 440 nm of 12 of the 14 stations show a weekly periodicity with lowest values on Sunday and Monday, but greatest values from Wednesday until Saturday, that is significant at least on a 90% level. The stations in Germany and in Greater Paris show weekly cycles with ranges of about 20% on average. In Northern Italy and Switzerland this range is about 10% on average. The corresponding weekly cycle of anthropogenic gaseous and particulate emissions leads us to the conclusion of the anthropogenic origin of the weekly AOT cycle. Since these AOT patterns are derived from the reduction of the direct sun radiation by the columnar atmospheric aerosol, this result represents strong evidence for an anthropogenic direct aerosol effect on shortwave radiation. Furthermore, this study makes a first contribution to the understanding and explanation of recently observed weekly periodicities in meteorological variables as temperature in Germany. Article in Journal/Newspaper Aerosol Robotic Network Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Bäumer, D. Rinke, R. Vogel, B. Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Statistical analyses of data from 14 ground-based sun photometer stations all over Central Europe are presented. All stations are part of the Aerosol Robotic Network (AERONET), and only data of the highest data quality level 2.0 had been applied. The averages by weekday of aerosol optical thickness (AOT) at a wavelength of 440 nm of 12 of the 14 stations show a weekly periodicity with lowest values on Sunday and Monday, but greatest values from Wednesday until Saturday, that is significant at least on a 90% level. The stations in Germany and in Greater Paris show weekly cycles with ranges of about 20% on average. In Northern Italy and Switzerland this range is about 10% on average. The corresponding weekly cycle of anthropogenic gaseous and particulate emissions leads us to the conclusion of the anthropogenic origin of the weekly AOT cycle. Since these AOT patterns are derived from the reduction of the direct sun radiation by the columnar atmospheric aerosol, this result represents strong evidence for an anthropogenic direct aerosol effect on shortwave radiation. Furthermore, this study makes a first contribution to the understanding and explanation of recently observed weekly periodicities in meteorological variables as temperature in Germany. |
author2 |
Institute for Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology (KIT) |
format |
Article in Journal/Newspaper |
author |
Bäumer, D. Rinke, R. Vogel, B. |
author_facet |
Bäumer, D. Rinke, R. Vogel, B. |
author_sort |
Bäumer, D. |
title |
Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect |
title_short |
Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect |
title_full |
Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect |
title_fullStr |
Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect |
title_full_unstemmed |
Weekly periodicities of aerosol optical thickness over Central Europe ? evidence of an anthropogenic direct aerosol effect |
title_sort |
weekly periodicities of aerosol optical thickness over central europe ? evidence of an anthropogenic direct aerosol effect |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00303031 https://hal.science/hal-00303031/document https://hal.science/hal-00303031/file/acpd-7-11545-2007.pdf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00303031 Atmospheric Chemistry and Physics Discussions, 2007, 7 (4), pp.11545-11560 |
op_relation |
hal-00303031 https://hal.science/hal-00303031 https://hal.science/hal-00303031/document https://hal.science/hal-00303031/file/acpd-7-11545-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782335414626942976 |