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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ftuniparissaclay:oai:HAL:insu-04466685v1 2024-10-13T14:01:14+00:00 Model investigation of the origins of wintertime Arctic aerosols over northern Alaska Ioannidis, Eleftherios Law, Kathy Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel M. Pratt, Kerri 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 Joint Institute for the Study of the Atmosphere and Ocean (JISAO) University of Washington Seattle Online, United States 2020-12 https://insu.hal.science/insu-04466685 en eng HAL CCSD BIBCODE: 2020AGUFMC045.0005I AGU Fall Meeting 2020 https://insu.hal.science/insu-04466685 AGU Fall Meeting 2020, Dec 2020, Online, United States. pp.C045-0005 [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/conferenceObject Conference papers 2020 ftuniparissaclay 2024-10-03T23:59:10Z 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 Archives ouvertes de Paris-Saclay Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Ioannidis, Eleftherios Law, Kathy Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel M. Pratt, Kerri Quinn, Patricia, K. Upchurch, Lucia Marelle, Louis Model investigation of the origins of wintertime Arctic aerosols over northern Alaska |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
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 Joint Institute for the Study of the Atmosphere and Ocean (JISAO) University of Washington Seattle |
format |
Conference Object |
author |
Ioannidis, Eleftherios Law, Kathy Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel M. Pratt, Kerri Quinn, Patricia, K. Upchurch, Lucia Marelle, Louis |
author_facet |
Ioannidis, Eleftherios Law, Kathy Raut, Jean-Christophe Onishi, Tatsuo Kirpes, Rachel M. Pratt, Kerri 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-04466685 |
op_coverage |
Online, United States |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
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 2020 https://insu.hal.science/insu-04466685 AGU Fall Meeting 2020, Dec 2020, Online, United States. pp.C045-0005 |
op_relation |
BIBCODE: 2020AGUFMC045.0005I |
_version_ |
1812809111023124480 |