Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations
Currently many ground-based atmospheric stations include in-situ measurements of aerosol physical and optical properties, resulting in more than 20 long-term (>10 yr) aerosol measurement sites in the Northern Hemisphere and Antarctica. Most of these sites are located at remote locations and monit...
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2013
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Online Access: | https://epic.awi.de/id/eprint/30900/ https://epic.awi.de/id/eprint/30900/1/acp-13-869-2013.pdf http://www.atmos-chem-phys.net/13/869/2013 https://hdl.handle.net/10013/epic.40711 https://hdl.handle.net/10013/epic.40711.d001 |
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ftawi:oai:epic.awi.de:30900 2024-09-09T19:08:11+00:00 Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations Collaud Coen, Martine Andrews, E. Asmi, Ari Baltensperger, U. Bukowiecki, N. Day, D. Fiebig, M. Fjaeraa, A.M. Flentje, H. Hyvärinen, A. Jefferson, A. Jennings, S.G. Kouvarakis, G. Lihavainen, H. Lund Myhre, C. Malm, W.C. Mihalopoulos, N. Molenar, J.V. O'Dowd, C. Ogren, J. A. Schichtel, B.A. Sheridan, P. Virkulla, A. Weingartner, E. Weller, Rolf Laj, P. 2013-01-22 application/pdf https://epic.awi.de/id/eprint/30900/ https://epic.awi.de/id/eprint/30900/1/acp-13-869-2013.pdf http://www.atmos-chem-phys.net/13/869/2013 https://hdl.handle.net/10013/epic.40711 https://hdl.handle.net/10013/epic.40711.d001 unknown Copernicus Publications https://epic.awi.de/id/eprint/30900/1/acp-13-869-2013.pdf https://hdl.handle.net/10013/epic.40711.d001 Collaud Coen, M. , Andrews, E. , Asmi, A. , Baltensperger, U. , Bukowiecki, N. , Day, D. , Fiebig, M. , Fjaeraa, A. , Flentje, H. , Hyvärinen, A. , Jefferson, A. , Jennings, S. , Kouvarakis, G. , Lihavainen, H. , Lund Myhre, C. , Malm, W. , Mihalopoulos, N. , Molenar, J. , O'Dowd, C. , Ogren, J. A. , Schichtel, B. , Sheridan, P. , Virkulla, A. , Weingartner, E. , Weller, R. orcid:0000-0003-4880-5572 and Laj, P. (2013) Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations , Atmos. Chem. Phys., 13 , pp. 869-894 . doi:10.5194/acp-13-869-2013 <https://doi.org/10.5194/acp-13-869-2013> , hdl:10013/epic.40711 EPIC3Atmos. Chem. Phys., Copernicus Publications, 13, pp. 869-894 Article isiRev 2013 ftawi https://doi.org/10.5194/acp-13-869-2013 2024-06-24T04:05:07Z Currently many ground-based atmospheric stations include in-situ measurements of aerosol physical and optical properties, resulting in more than 20 long-term (>10 yr) aerosol measurement sites in the Northern Hemisphere and Antarctica. Most of these sites are located at remote locations and monitor the aerosol particle number concentration, wavelength-dependent light scattering, backscattering, and absorption coefficients. The existence of these multi-year datasets enables the analysis of long-term trends of these aerosol parameters, and of the derived light scattering A° ngstro¨m exponent and backscatter fraction. Since the aerosol variables are not normally distributed, three different methods (the seasonal Mann-Kendall test associated with the Sen’s slope, the generalized least squares fit associated with an autoregressive bootstrap algorithm for confidence intervals, and the least-mean square fit applied to logarithms of the data) were applied to detect the long-term trends and their magnitudes. To allow a comparison among measurement sites, trends on the most recent 10 and 15 yr periods were calculated. No significant trends were found for the three continental European sites. Statistically significant trends were found for the two European marine sites but the signs of the trends varied with aerosol property and location. Statistically significant decreasing trends for both scattering and absorption coefficients (mean slope of −2.0%yr−1) were found for most North American stations, although positive trends were found for a few desert and high-altitude sites. The difference in the timing of emission reduction policy for the Europe and US continents is a likely explanation for the decreasing trends in aerosol optical parameters found for most American sites compared to the lack of trends observed in Europe. No significant trends in scattering coefficient were found for the Arctic or Antarctic stations, whereas the Arctic station had a negative trend in absorption coefficient. The high altitude Pacific ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Arctic Kendall ENVELOPE(-59.828,-59.828,-63.497,-63.497) Pacific Atmospheric Chemistry and Physics 13 2 869 894 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Currently many ground-based atmospheric stations include in-situ measurements of aerosol physical and optical properties, resulting in more than 20 long-term (>10 yr) aerosol measurement sites in the Northern Hemisphere and Antarctica. Most of these sites are located at remote locations and monitor the aerosol particle number concentration, wavelength-dependent light scattering, backscattering, and absorption coefficients. The existence of these multi-year datasets enables the analysis of long-term trends of these aerosol parameters, and of the derived light scattering A° ngstro¨m exponent and backscatter fraction. Since the aerosol variables are not normally distributed, three different methods (the seasonal Mann-Kendall test associated with the Sen’s slope, the generalized least squares fit associated with an autoregressive bootstrap algorithm for confidence intervals, and the least-mean square fit applied to logarithms of the data) were applied to detect the long-term trends and their magnitudes. To allow a comparison among measurement sites, trends on the most recent 10 and 15 yr periods were calculated. No significant trends were found for the three continental European sites. Statistically significant trends were found for the two European marine sites but the signs of the trends varied with aerosol property and location. Statistically significant decreasing trends for both scattering and absorption coefficients (mean slope of −2.0%yr−1) were found for most North American stations, although positive trends were found for a few desert and high-altitude sites. The difference in the timing of emission reduction policy for the Europe and US continents is a likely explanation for the decreasing trends in aerosol optical parameters found for most American sites compared to the lack of trends observed in Europe. No significant trends in scattering coefficient were found for the Arctic or Antarctic stations, whereas the Arctic station had a negative trend in absorption coefficient. The high altitude Pacific ... |
format |
Article in Journal/Newspaper |
author |
Collaud Coen, Martine Andrews, E. Asmi, Ari Baltensperger, U. Bukowiecki, N. Day, D. Fiebig, M. Fjaeraa, A.M. Flentje, H. Hyvärinen, A. Jefferson, A. Jennings, S.G. Kouvarakis, G. Lihavainen, H. Lund Myhre, C. Malm, W.C. Mihalopoulos, N. Molenar, J.V. O'Dowd, C. Ogren, J. A. Schichtel, B.A. Sheridan, P. Virkulla, A. Weingartner, E. Weller, Rolf Laj, P. |
spellingShingle |
Collaud Coen, Martine Andrews, E. Asmi, Ari Baltensperger, U. Bukowiecki, N. Day, D. Fiebig, M. Fjaeraa, A.M. Flentje, H. Hyvärinen, A. Jefferson, A. Jennings, S.G. Kouvarakis, G. Lihavainen, H. Lund Myhre, C. Malm, W.C. Mihalopoulos, N. Molenar, J.V. O'Dowd, C. Ogren, J. A. Schichtel, B.A. Sheridan, P. Virkulla, A. Weingartner, E. Weller, Rolf Laj, P. Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations |
author_facet |
Collaud Coen, Martine Andrews, E. Asmi, Ari Baltensperger, U. Bukowiecki, N. Day, D. Fiebig, M. Fjaeraa, A.M. Flentje, H. Hyvärinen, A. Jefferson, A. Jennings, S.G. Kouvarakis, G. Lihavainen, H. Lund Myhre, C. Malm, W.C. Mihalopoulos, N. Molenar, J.V. O'Dowd, C. Ogren, J. A. Schichtel, B.A. Sheridan, P. Virkulla, A. Weingartner, E. Weller, Rolf Laj, P. |
author_sort |
Collaud Coen, Martine |
title |
Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations |
title_short |
Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations |
title_full |
Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations |
title_fullStr |
Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations |
title_full_unstemmed |
Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations |
title_sort |
aerosol decadal trends - part 1: in-situ optical measurements at gaw and improve stations |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/30900/ https://epic.awi.de/id/eprint/30900/1/acp-13-869-2013.pdf http://www.atmos-chem-phys.net/13/869/2013 https://hdl.handle.net/10013/epic.40711 https://hdl.handle.net/10013/epic.40711.d001 |
long_lat |
ENVELOPE(-59.828,-59.828,-63.497,-63.497) |
geographic |
Antarctic Arctic Kendall Pacific |
geographic_facet |
Antarctic Arctic Kendall Pacific |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_source |
EPIC3Atmos. Chem. Phys., Copernicus Publications, 13, pp. 869-894 |
op_relation |
https://epic.awi.de/id/eprint/30900/1/acp-13-869-2013.pdf https://hdl.handle.net/10013/epic.40711.d001 Collaud Coen, M. , Andrews, E. , Asmi, A. , Baltensperger, U. , Bukowiecki, N. , Day, D. , Fiebig, M. , Fjaeraa, A. , Flentje, H. , Hyvärinen, A. , Jefferson, A. , Jennings, S. , Kouvarakis, G. , Lihavainen, H. , Lund Myhre, C. , Malm, W. , Mihalopoulos, N. , Molenar, J. , O'Dowd, C. , Ogren, J. A. , Schichtel, B. , Sheridan, P. , Virkulla, A. , Weingartner, E. , Weller, R. orcid:0000-0003-4880-5572 and Laj, P. (2013) Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations , Atmos. Chem. Phys., 13 , pp. 869-894 . doi:10.5194/acp-13-869-2013 <https://doi.org/10.5194/acp-13-869-2013> , hdl:10013/epic.40711 |
op_doi |
https://doi.org/10.5194/acp-13-869-2013 |
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Atmospheric Chemistry and Physics |
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13 |
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2 |
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869 |
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894 |
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1809822391344300032 |