Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories
Even though the Arctic is remote, aerosol properties observed there are strongly influenced by anthropogenic emissions from outside the Arctic. This is particularly true for the so-called Arctic haze season (January through April). In summer (June through September), when atmospheric transport patte...
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Online Access: | http://www.osti.gov/servlets/purl/1860628 https://www.osti.gov/biblio/1860628 https://doi.org/10.5194/acp-22-3067-2022 |
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ftosti:oai:osti.gov:1860628 2023-07-30T03:55:41+02:00 Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories Schmale, Julia Sharma, Sangeeta Decesari, Stefano Pernov, Jakob Massling, Andreas Hansson, Hans-Christen von Salzen, Knut Skov, Henrik Andrews, Elisabeth Quinn, Patricia K. Upchurch, Lucia M. Eleftheriadis, Konstantinos Traversi, Rita Gilardoni, Stefania Mazzola, Mauro Laing, James Hopke, Philip 2023-02-23 application/pdf http://www.osti.gov/servlets/purl/1860628 https://www.osti.gov/biblio/1860628 https://doi.org/10.5194/acp-22-3067-2022 unknown http://www.osti.gov/servlets/purl/1860628 https://www.osti.gov/biblio/1860628 https://doi.org/10.5194/acp-22-3067-2022 doi:10.5194/acp-22-3067-2022 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.5194/acp-22-3067-2022 2023-07-11T10:11:30Z Even though the Arctic is remote, aerosol properties observed there are strongly influenced by anthropogenic emissions from outside the Arctic. This is particularly true for the so-called Arctic haze season (January through April). In summer (June through September), when atmospheric transport patterns change, and precipitation is more frequent, local Arctic sources, i.e., natural sources of aerosols and precursors, play an important role. Over the last few decades, significant reductions in anthropogenic emissions have taken place. At the same time a large body of literature shows evidence that the Arctic is undergoing fundamental environmental changes due to climate forcing, leading to enhanced emissions by natural processes that may impact aerosol properties. In this study, we analyze 9 aerosol chemical species and 4 particle optical properties from 10 Arctic observatories (Alert, Kevo, Pallas, Summit, Thule, Tiksi, Barrow/Utgiavik, Villum, and Gruvebadet and Zeppelin Observatory – both at Ny-Ålesund Research Station) to understand changes in anthropogenic and natural aerosol contributions. Variables include equivalent black carbon, particulate sulfate, nitrate, ammonium, methanesulfonic acid, sodium, iron, calcium and potassium, as well as scattering and absorption coefficients, single scattering albedo and scattering Ångström exponent. First, annual cycles are investigated, which despite anthropogenic emission reductions still show the Arctic haze phenomenon. Second, long-term trends are studied using the Mann–Kendall Theil–Sen slope method. We find in total 41 significant trends over full station records, i.e., spanning more than a decade, compared to 26 significant decadal trends. The majority of significantly declining trends is from anthropogenic tracers and occurred during the haze period, driven by emission changes between 1990 and 2000. For the summer period, no uniform picture of trends has emerged. Twenty-six percent of trends, i.e., 19 out of 73, are significant, and of those 5 are positive and 14 ... Other/Unknown Material albedo Arctic black carbon Ny Ålesund Ny-Ålesund Tiksi SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Kendall ENVELOPE(-59.828,-59.828,-63.497,-63.497) Kevo ENVELOPE(27.020,27.020,69.758,69.758) Ny-Ålesund Tiksi ENVELOPE(128.867,128.867,71.633,71.633) Atmospheric Chemistry and Physics 22 5 3067 3096 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Schmale, Julia Sharma, Sangeeta Decesari, Stefano Pernov, Jakob Massling, Andreas Hansson, Hans-Christen von Salzen, Knut Skov, Henrik Andrews, Elisabeth Quinn, Patricia K. Upchurch, Lucia M. Eleftheriadis, Konstantinos Traversi, Rita Gilardoni, Stefania Mazzola, Mauro Laing, James Hopke, Philip Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Even though the Arctic is remote, aerosol properties observed there are strongly influenced by anthropogenic emissions from outside the Arctic. This is particularly true for the so-called Arctic haze season (January through April). In summer (June through September), when atmospheric transport patterns change, and precipitation is more frequent, local Arctic sources, i.e., natural sources of aerosols and precursors, play an important role. Over the last few decades, significant reductions in anthropogenic emissions have taken place. At the same time a large body of literature shows evidence that the Arctic is undergoing fundamental environmental changes due to climate forcing, leading to enhanced emissions by natural processes that may impact aerosol properties. In this study, we analyze 9 aerosol chemical species and 4 particle optical properties from 10 Arctic observatories (Alert, Kevo, Pallas, Summit, Thule, Tiksi, Barrow/Utgiavik, Villum, and Gruvebadet and Zeppelin Observatory – both at Ny-Ålesund Research Station) to understand changes in anthropogenic and natural aerosol contributions. Variables include equivalent black carbon, particulate sulfate, nitrate, ammonium, methanesulfonic acid, sodium, iron, calcium and potassium, as well as scattering and absorption coefficients, single scattering albedo and scattering Ångström exponent. First, annual cycles are investigated, which despite anthropogenic emission reductions still show the Arctic haze phenomenon. Second, long-term trends are studied using the Mann–Kendall Theil–Sen slope method. We find in total 41 significant trends over full station records, i.e., spanning more than a decade, compared to 26 significant decadal trends. The majority of significantly declining trends is from anthropogenic tracers and occurred during the haze period, driven by emission changes between 1990 and 2000. For the summer period, no uniform picture of trends has emerged. Twenty-six percent of trends, i.e., 19 out of 73, are significant, and of those 5 are positive and 14 ... |
author |
Schmale, Julia Sharma, Sangeeta Decesari, Stefano Pernov, Jakob Massling, Andreas Hansson, Hans-Christen von Salzen, Knut Skov, Henrik Andrews, Elisabeth Quinn, Patricia K. Upchurch, Lucia M. Eleftheriadis, Konstantinos Traversi, Rita Gilardoni, Stefania Mazzola, Mauro Laing, James Hopke, Philip |
author_facet |
Schmale, Julia Sharma, Sangeeta Decesari, Stefano Pernov, Jakob Massling, Andreas Hansson, Hans-Christen von Salzen, Knut Skov, Henrik Andrews, Elisabeth Quinn, Patricia K. Upchurch, Lucia M. Eleftheriadis, Konstantinos Traversi, Rita Gilardoni, Stefania Mazzola, Mauro Laing, James Hopke, Philip |
author_sort |
Schmale, Julia |
title |
Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories |
title_short |
Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories |
title_full |
Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories |
title_fullStr |
Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories |
title_full_unstemmed |
Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories |
title_sort |
pan-arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1860628 https://www.osti.gov/biblio/1860628 https://doi.org/10.5194/acp-22-3067-2022 |
long_lat |
ENVELOPE(-59.828,-59.828,-63.497,-63.497) ENVELOPE(27.020,27.020,69.758,69.758) ENVELOPE(128.867,128.867,71.633,71.633) |
geographic |
Arctic Kendall Kevo Ny-Ålesund Tiksi |
geographic_facet |
Arctic Kendall Kevo Ny-Ålesund Tiksi |
genre |
albedo Arctic black carbon Ny Ålesund Ny-Ålesund Tiksi |
genre_facet |
albedo Arctic black carbon Ny Ålesund Ny-Ålesund Tiksi |
op_relation |
http://www.osti.gov/servlets/purl/1860628 https://www.osti.gov/biblio/1860628 https://doi.org/10.5194/acp-22-3067-2022 doi:10.5194/acp-22-3067-2022 |
op_doi |
https://doi.org/10.5194/acp-22-3067-2022 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
22 |
container_issue |
5 |
container_start_page |
3067 |
op_container_end_page |
3096 |
_version_ |
1772821216453722112 |