Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign
International audience The wintertime Arctic is influenced by air pollution transported from mid-latitudes, leading to formation of Arctic Haze, as well as local emissions such as combustion for heating and power production in very cold winter conditions. This contributes to severe air pollution epi...
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Language: | English |
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HAL CCSD
2021
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Online Access: | https://doi.org/10.5194/egusphere-egu21-15477 https://hal-insu.archives-ouvertes.fr/insu-03194235 |
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envir geo |
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envir geo Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Marelle, Louis Roberts, Tjarda, Barret, Brice D'ANNA, Barbara, Temine-Roussel, Brice Mölders, Nicole Mao, Jingqiu Simpson, William Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign |
topic_facet |
envir geo |
description |
International audience The wintertime Arctic is influenced by air pollution transported from mid-latitudes, leading to formation of Arctic Haze, as well as local emissions such as combustion for heating and power production in very cold winter conditions. This contributes to severe air pollution episodes, with enhanced aerosol concentrations, inter-dispersed with cleaner periods. However, the formation of secondary aerosol particles (sulphate, organics, nitrate) in cold/dark wintertime Arctic conditions, which could contribute to these pollution episodes, is poorly understood.In this study, which contributes to the Air Pollution in the Arctic: Climate, Environment and Societies - Alaskan Layered Pollution and Arctic Chemical Analysis (PACES-ALPACA) initiative, the Weather Research Forecasting Model with chemistry (WRF-Chem) is used to investigate wintertime pollution over central Alaska focusing on the Fairbanks region, during the pre-ALPACA campaign in winter 2019-2020. Fairbanks is the most polluted city in the United States during wintertime, due to high local emissions and the occurrence of strong surface temperature inversions trapping pollutants near the surface.Firstly, different WRF meteorological and surface schemes were tested over Alaska with a particular focus on improving simulations of the wintertime boundary layer structure including temperature inversions. An optimal WRF set-up, with increased vertical resolution below 2km, was selected based on evaluation against available data.Secondly, a quasi-hemispheric WRF-Chem simulation, using the improved WRF setup, was used to assess large-scale synoptic conditions and to evaluate background aerosols originating from remote anthropogenic and natural sources affecting central Alaska during the campaign. The model was run with Evaluating the Climate and Air Quality Impacts of Short-Lived Pollutants (ECLIPSE) v6b anthropogenic emissions and improved sea-spray aerosol emissions. Discrepancies in modelled aerosols compared available data are being ... |
author2 |
TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) Laboratoire d'aérologie (LAERO) Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées Geophysical Institute Fairbanks University of Alaska Fairbanks (UAF) |
format |
Other/Unknown Material |
author |
Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Marelle, Louis Roberts, Tjarda, Barret, Brice D'ANNA, Barbara, Temine-Roussel, Brice Mölders, Nicole Mao, Jingqiu Simpson, William |
author_facet |
Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Marelle, Louis Roberts, Tjarda, Barret, Brice D'ANNA, Barbara, Temine-Roussel, Brice Mölders, Nicole Mao, Jingqiu Simpson, William |
author_sort |
Ioannidis, Eleftherios |
title |
Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign |
title_short |
Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign |
title_full |
Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign |
title_fullStr |
Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign |
title_full_unstemmed |
Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign |
title_sort |
wintertime arctic air pollution over central alaska: pre-alpaca campaign |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://doi.org/10.5194/egusphere-egu21-15477 https://hal-insu.archives-ouvertes.fr/insu-03194235 |
op_coverage |
Online Meeting, Germany |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société EGU General Assembly 2021 EGU General Assembly 2021, Apr 2021, Online Meeting, Germany. pp.EGU21-15477, ⟨10.5194/egusphere-egu21-15477⟩ |
op_relation |
insu-03194235 doi:10.5194/egusphere-egu21-15477 10670/1.ctv9lp https://hal-insu.archives-ouvertes.fr/insu-03194235 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/egusphere-egu21-15477 |
_version_ |
1766314966684532736 |
spelling |
fttriple:oai:gotriple.eu:10670/1.ctv9lp 2023-05-15T14:43:17+02:00 Wintertime Arctic Air Pollution over central Alaska: pre-ALPACA campaign Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Marelle, Louis Roberts, Tjarda, Barret, Brice D'ANNA, Barbara, Temine-Roussel, Brice Mölders, Nicole Mao, Jingqiu Simpson, William TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) Laboratoire d'aérologie (LAERO) Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées Geophysical Institute Fairbanks University of Alaska Fairbanks (UAF) Online Meeting, Germany 2021-04-01 https://doi.org/10.5194/egusphere-egu21-15477 https://hal-insu.archives-ouvertes.fr/insu-03194235 en eng HAL CCSD insu-03194235 doi:10.5194/egusphere-egu21-15477 10670/1.ctv9lp https://hal-insu.archives-ouvertes.fr/insu-03194235 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société EGU General Assembly 2021 EGU General Assembly 2021, Apr 2021, Online Meeting, Germany. pp.EGU21-15477, ⟨10.5194/egusphere-egu21-15477⟩ envir geo Conference Output https://vocabularies.coar-repositories.org/resource_types/c_c94f/ 2021 fttriple https://doi.org/10.5194/egusphere-egu21-15477 2023-01-22T18:14:59Z International audience The wintertime Arctic is influenced by air pollution transported from mid-latitudes, leading to formation of Arctic Haze, as well as local emissions such as combustion for heating and power production in very cold winter conditions. This contributes to severe air pollution episodes, with enhanced aerosol concentrations, inter-dispersed with cleaner periods. However, the formation of secondary aerosol particles (sulphate, organics, nitrate) in cold/dark wintertime Arctic conditions, which could contribute to these pollution episodes, is poorly understood.In this study, which contributes to the Air Pollution in the Arctic: Climate, Environment and Societies - Alaskan Layered Pollution and Arctic Chemical Analysis (PACES-ALPACA) initiative, the Weather Research Forecasting Model with chemistry (WRF-Chem) is used to investigate wintertime pollution over central Alaska focusing on the Fairbanks region, during the pre-ALPACA campaign in winter 2019-2020. Fairbanks is the most polluted city in the United States during wintertime, due to high local emissions and the occurrence of strong surface temperature inversions trapping pollutants near the surface.Firstly, different WRF meteorological and surface schemes were tested over Alaska with a particular focus on improving simulations of the wintertime boundary layer structure including temperature inversions. An optimal WRF set-up, with increased vertical resolution below 2km, was selected based on evaluation against available data.Secondly, a quasi-hemispheric WRF-Chem simulation, using the improved WRF setup, was used to assess large-scale synoptic conditions and to evaluate background aerosols originating from remote anthropogenic and natural sources affecting central Alaska during the campaign. The model was run with Evaluating the Climate and Air Quality Impacts of Short-Lived Pollutants (ECLIPSE) v6b anthropogenic emissions and improved sea-spray aerosol emissions. Discrepancies in modelled aerosols compared available data are being ... Other/Unknown Material Arctic Alaska Unknown Arctic Fairbanks |