Model investigation of the origins of wintertime Arctic aerosols over northern Alaska
International audience The Arctic is influenced by long-range transport of aerosols from mid-latitude emissions, especially in winter and spring, leading to formation of Arctic Haze. Natural aerosols, such as sea-salt, also contribute to wintertime Arctic aerosol loadings. Local sources of aerosols...
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ftinsu:oai:HAL:insu-03195197v1 2024-04-28T07:54:16+00:00 Model investigation of the origins of wintertime Arctic aerosols over northern Alaska Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel Pratt, Kerri A. Quinn, Patricia, K Upchurch, Lucia Marelle, Louis TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Department of Earth and Environmental Sciences Ann Arbor University of Michigan Ann Arbor University of Michigan System-University of Michigan System University of Michigan System University of Washington Seattle Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Online Meeting, United States 2020-12 https://insu.hal.science/insu-03195197 en eng HAL CCSD insu-03195197 https://insu.hal.science/insu-03195197 AGU Fall Meeting https://insu.hal.science/insu-03195197 AGU Fall Meeting, Dec 2020, Online Meeting, United States. pp.C045-0005 [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2020 ftinsu 2024-04-05T00:37:31Z International audience The Arctic is influenced by long-range transport of aerosols from mid-latitude emissions, especially in winter and spring, leading to formation of Arctic Haze. Natural aerosols, such as sea-salt, also contribute to wintertime Arctic aerosol loadings. Local sources of aerosols are highlighted as being important, but many uncertainties remain about the relative contributions of natural and anthropogenic sources and aerosol processes. In particular, models have difficulties reproducing observed aerosol distributions and composition.In this study, the Weather Research Forecasting Model with chemistry (WRF-Chem) is used to investigate origins of wintertime aerosols over northern Alaska focusing on the influence of local versus remote sources and examining the role of meteorology, in particular, stable boundary layers that can trap aerosols near the surface. The model was run first in hemispheric mode using AMAP-ECLIPSEv6 anthropogenic emissions and a dynamical (WRF) setup for improved simulation of cold, stable meteorological conditions over wintertime Alaska. Model results are evaluated against available surface data and, in particular, data collected at Utqiaġvik during January-February 2014. A variety of air masses were sampled including air masses originating from the Arctic Ocean and from the North Slope of Alaska oil and gas extraction emissions to the east on the northern coast of Alaska.We investigate the ability of the model to reproduce observed natural aerosols, especially local and transported sea-salt and marine organic aerosols. The sensitivity of modelled aerosols and natural emissions to, for example, sea-ice fraction, surface winds, and relative humidity, are examined, as well as model treatments of marine organic aerosols. We also investigate the ability of the model to reproduce anthropogenic aerosols originating from remote sources and runs including local emissions are used to assess the influence of aerosols originating from the North Slope of Alaska oil fields. ... Conference Object AMAP Arctic Arctic Ocean north slope Sea ice Alaska Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel Pratt, Kerri A. Quinn, Patricia, K Upchurch, Lucia Marelle, Louis Model investigation of the origins of wintertime Arctic aerosols over northern Alaska |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience The Arctic is influenced by long-range transport of aerosols from mid-latitude emissions, especially in winter and spring, leading to formation of Arctic Haze. Natural aerosols, such as sea-salt, also contribute to wintertime Arctic aerosol loadings. Local sources of aerosols are highlighted as being important, but many uncertainties remain about the relative contributions of natural and anthropogenic sources and aerosol processes. In particular, models have difficulties reproducing observed aerosol distributions and composition.In this study, the Weather Research Forecasting Model with chemistry (WRF-Chem) is used to investigate origins of wintertime aerosols over northern Alaska focusing on the influence of local versus remote sources and examining the role of meteorology, in particular, stable boundary layers that can trap aerosols near the surface. The model was run first in hemispheric mode using AMAP-ECLIPSEv6 anthropogenic emissions and a dynamical (WRF) setup for improved simulation of cold, stable meteorological conditions over wintertime Alaska. Model results are evaluated against available surface data and, in particular, data collected at Utqiaġvik during January-February 2014. A variety of air masses were sampled including air masses originating from the Arctic Ocean and from the North Slope of Alaska oil and gas extraction emissions to the east on the northern coast of Alaska.We investigate the ability of the model to reproduce observed natural aerosols, especially local and transported sea-salt and marine organic aerosols. The sensitivity of modelled aerosols and natural emissions to, for example, sea-ice fraction, surface winds, and relative humidity, are examined, as well as model treatments of marine organic aerosols. We also investigate the ability of the model to reproduce anthropogenic aerosols originating from remote sources and runs including local emissions are used to assess the influence of aerosols originating from the North Slope of Alaska oil fields. ... |
author2 |
TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Department of Earth and Environmental Sciences Ann Arbor University of Michigan Ann Arbor University of Michigan System-University of Michigan System University of Michigan System University of Washington Seattle Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Conference Object |
author |
Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel Pratt, Kerri A. Quinn, Patricia, K Upchurch, Lucia Marelle, Louis |
author_facet |
Ioannidis, Eleftherios Law, Kathy S. Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel Pratt, Kerri A. Quinn, Patricia, K Upchurch, Lucia Marelle, Louis |
author_sort |
Ioannidis, Eleftherios |
title |
Model investigation of the origins of wintertime Arctic aerosols over northern Alaska |
title_short |
Model investigation of the origins of wintertime Arctic aerosols over northern Alaska |
title_full |
Model investigation of the origins of wintertime Arctic aerosols over northern Alaska |
title_fullStr |
Model investigation of the origins of wintertime Arctic aerosols over northern Alaska |
title_full_unstemmed |
Model investigation of the origins of wintertime Arctic aerosols over northern Alaska |
title_sort |
model investigation of the origins of wintertime arctic aerosols over northern alaska |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://insu.hal.science/insu-03195197 |
op_coverage |
Online Meeting, United States |
genre |
AMAP Arctic Arctic Ocean north slope Sea ice Alaska |
genre_facet |
AMAP Arctic Arctic Ocean north slope Sea ice Alaska |
op_source |
AGU Fall Meeting https://insu.hal.science/insu-03195197 AGU Fall Meeting, Dec 2020, Online Meeting, United States. pp.C045-0005 |
op_relation |
insu-03195197 https://insu.hal.science/insu-03195197 |
_version_ |
1797575228383035392 |