Biogenic influence on the composition and growth of summertime Arctic aerosol
International audience The summertime Arctic lower troposphere is a relatively pristine background aerosol environment dominated by nucleation and Aitken mode particles. Understanding the mechanisms that control the formation and growth of aerosol is crucial for our ability to predict cloud properti...
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ftinsu:oai:HAL:insu-01418724v1 2024-02-11T10:00:40+01:00 Biogenic influence on the composition and growth of summertime Arctic aerosol Willis, Megan D. Burkart, Julia Thomas, Jennie L. Koellner, Franziska Schneider, Johannes, M. Bozem, Heiko Hoor, Peter M. Aliabadi, Amir A. Schulz, Hannes Herber, Andreas B. Leaitch, Richard Abbatt, Jonathan P. D. Department of Chemistry University of Toronto University of Toronto TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University (JGU) Environmental Engineering Program Guelph University of Guelph Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Environment and Climate Change Canada San Francisco, United States 2016-12-12 https://insu.hal.science/insu-01418724 en eng HAL CCSD insu-01418724 https://insu.hal.science/insu-01418724 AGU Fall Meeting 2016 https://insu.hal.science/insu-01418724 AGU Fall Meeting 2016, Dec 2016, San Francisco, United States [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2016 ftinsu 2024-01-17T17:29:46Z International audience The summertime Arctic lower troposphere is a relatively pristine background aerosol environment dominated by nucleation and Aitken mode particles. Understanding the mechanisms that control the formation and growth of aerosol is crucial for our ability to predict cloud properties and therefore radiative balance and climate. We present aircraft-based observations of submicron aerosol composition from an aerosol mass spectrometer made during the NETCARE 2014 summertime arctic campaign, based in the Canadian High Arctic, at Resolute Bay, NU (74°N). Under stable and regionally influenced atmospheric conditions with low carbon monoxide and black carbon concentrations (< 100 ppbv and < 50 ng/m 3 , respectively), we observed organic aerosol (OA)-to-sulfate ratios ranging from ~0.5 to > 6 with evidence for enhancement within the lower boundary layer. Methanesulfonic acid (MSA), a marker for the contribution of ocean-derived biogenic sulphur, was also observed in submicron aerosol. MSA-to-sulfate ratios ranged from near zero to ~0.3 and tended to increase within the lower boundary layer, suggesting a contribution to aerosol loading from the ocean. In one notable case while flying in the lower boundary layer above open water in Lancaster Sound, we observed growth of small particles, <20 nm in diameter, into sizes above 50 nm. Aerosol growth was correlated with the presence of organic species, trimethylamine, and MSA in particles ~80 nm and larger, where the organics were similar to those previously observed in marine settings. The organic-rich aerosol contributed significantly to particles active as cloud condensation nuclei (CCN, supersaturation = 0.6%). Our results highlight the potential importance of secondary organic aerosol formation and its role in growing nucleation mode aerosol into CCN-active sizes in this remote marine environment. Conference Object Arctic black carbon Lancaster Sound Resolute Bay Institut national des sciences de l'Univers: HAL-INSU Arctic Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) Resolute Bay ENVELOPE(-94.842,-94.842,74.677,74.677) |
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] Willis, Megan D. Burkart, Julia Thomas, Jennie L. Koellner, Franziska Schneider, Johannes, M. Bozem, Heiko Hoor, Peter M. Aliabadi, Amir A. Schulz, Hannes Herber, Andreas B. Leaitch, Richard Abbatt, Jonathan P. D. Biogenic influence on the composition and growth of summertime Arctic aerosol |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience The summertime Arctic lower troposphere is a relatively pristine background aerosol environment dominated by nucleation and Aitken mode particles. Understanding the mechanisms that control the formation and growth of aerosol is crucial for our ability to predict cloud properties and therefore radiative balance and climate. We present aircraft-based observations of submicron aerosol composition from an aerosol mass spectrometer made during the NETCARE 2014 summertime arctic campaign, based in the Canadian High Arctic, at Resolute Bay, NU (74°N). Under stable and regionally influenced atmospheric conditions with low carbon monoxide and black carbon concentrations (< 100 ppbv and < 50 ng/m 3 , respectively), we observed organic aerosol (OA)-to-sulfate ratios ranging from ~0.5 to > 6 with evidence for enhancement within the lower boundary layer. Methanesulfonic acid (MSA), a marker for the contribution of ocean-derived biogenic sulphur, was also observed in submicron aerosol. MSA-to-sulfate ratios ranged from near zero to ~0.3 and tended to increase within the lower boundary layer, suggesting a contribution to aerosol loading from the ocean. In one notable case while flying in the lower boundary layer above open water in Lancaster Sound, we observed growth of small particles, <20 nm in diameter, into sizes above 50 nm. Aerosol growth was correlated with the presence of organic species, trimethylamine, and MSA in particles ~80 nm and larger, where the organics were similar to those previously observed in marine settings. The organic-rich aerosol contributed significantly to particles active as cloud condensation nuclei (CCN, supersaturation = 0.6%). Our results highlight the potential importance of secondary organic aerosol formation and its role in growing nucleation mode aerosol into CCN-active sizes in this remote marine environment. |
author2 |
Department of Chemistry University of Toronto University of Toronto TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University (JGU) Environmental Engineering Program Guelph University of Guelph Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Environment and Climate Change Canada |
format |
Conference Object |
author |
Willis, Megan D. Burkart, Julia Thomas, Jennie L. Koellner, Franziska Schneider, Johannes, M. Bozem, Heiko Hoor, Peter M. Aliabadi, Amir A. Schulz, Hannes Herber, Andreas B. Leaitch, Richard Abbatt, Jonathan P. D. |
author_facet |
Willis, Megan D. Burkart, Julia Thomas, Jennie L. Koellner, Franziska Schneider, Johannes, M. Bozem, Heiko Hoor, Peter M. Aliabadi, Amir A. Schulz, Hannes Herber, Andreas B. Leaitch, Richard Abbatt, Jonathan P. D. |
author_sort |
Willis, Megan D. |
title |
Biogenic influence on the composition and growth of summertime Arctic aerosol |
title_short |
Biogenic influence on the composition and growth of summertime Arctic aerosol |
title_full |
Biogenic influence on the composition and growth of summertime Arctic aerosol |
title_fullStr |
Biogenic influence on the composition and growth of summertime Arctic aerosol |
title_full_unstemmed |
Biogenic influence on the composition and growth of summertime Arctic aerosol |
title_sort |
biogenic influence on the composition and growth of summertime arctic aerosol |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://insu.hal.science/insu-01418724 |
op_coverage |
San Francisco, United States |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) ENVELOPE(-83.999,-83.999,74.218,74.218) ENVELOPE(-94.842,-94.842,74.677,74.677) |
geographic |
Arctic Aitken Lancaster Sound Resolute Bay |
geographic_facet |
Arctic Aitken Lancaster Sound Resolute Bay |
genre |
Arctic black carbon Lancaster Sound Resolute Bay |
genre_facet |
Arctic black carbon Lancaster Sound Resolute Bay |
op_source |
AGU Fall Meeting 2016 https://insu.hal.science/insu-01418724 AGU Fall Meeting 2016, Dec 2016, San Francisco, United States |
op_relation |
insu-01418724 https://insu.hal.science/insu-01418724 |
_version_ |
1790596369664180224 |