Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014
<p>Ice nucleating particles (INPs) in the Arctic can influence climate and precipitation in the region; yet our understanding of the concentrations and sources of INPs in this region remain uncertain. In the following, we (1) measured concentrations of INPs in the immersion mode in the Canadia...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-01-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/19/1027/2019/acp-19-1027-2019.pdf |
| id |
doaj-cce949c3bcf7448ab8bcf53091a5da23 |
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Article |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
V. E. Irish S. J. Hanna M. D. Willis S. China J. L. Thomas J. L. Thomas J. J. B. Wentzell A. Cirisan M. Si W. R. Leaitch J. G. Murphy J. P. D. Abbatt A. Laskin E. Girard E. Girard A. K. Bertram |
| spellingShingle |
V. E. Irish S. J. Hanna M. D. Willis S. China J. L. Thomas J. L. Thomas J. J. B. Wentzell A. Cirisan M. Si W. R. Leaitch J. G. Murphy J. P. D. Abbatt A. Laskin E. Girard E. Girard A. K. Bertram Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014 Atmospheric Chemistry and Physics |
| author_facet |
V. E. Irish S. J. Hanna M. D. Willis S. China J. L. Thomas J. L. Thomas J. J. B. Wentzell A. Cirisan M. Si W. R. Leaitch J. G. Murphy J. P. D. Abbatt A. Laskin E. Girard E. Girard A. K. Bertram |
| author_sort |
V. E. Irish |
| title |
Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014 |
| title_short |
Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014 |
| title_full |
Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014 |
| title_fullStr |
Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014 |
| title_full_unstemmed |
Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014 |
| title_sort |
ice nucleating particles in the marine boundary layer in the canadian arctic during summer 2014 |
| publisher |
Copernicus Publications |
| series |
Atmospheric Chemistry and Physics |
| issn |
1680-7316 1680-7324 |
| publishDate |
2019-01-01 |
| description |
<p>Ice nucleating particles (INPs) in the Arctic can influence climate
and precipitation in the region; yet our understanding of the concentrations and sources
of INPs in this region remain uncertain. In the following, we (1) measured concentrations
of INPs in the immersion mode in the Canadian Arctic marine boundary layer during
summer 2014 on board the CCGS <i>Amundsen</i>, (2) determined ratios of surface areas
of mineral dust aerosol to sea spray aerosol, and (3) investigated the source region of
the INPs using particle dispersion modelling. Average concentrations of INPs at <span class="inline-formula">−15</span>,
<span class="inline-formula">−20</span>, and <span class="inline-formula">−25</span> <span class="inline-formula"><sup>∘</sup>C</span> were 0.005, 0.044, and 0.154 <span class="inline-formula">L<sup>−1</sup></span>,
respectively. These concentrations fall within the range of INP concentrations measured
in other marine environments. For the samples investigated the ratio of mineral dust
surface area to sea spray surface area ranged from 0.03 to 0.09. Based on these ratios
and the ice active surface site densities of mineral dust and sea spray aerosol
determined in previous laboratory studies, our results suggest that mineral dust is a
more important contributor to the INP population than sea spray aerosol for the samples
analysed. Based on particle dispersion modelling, the highest concentrations of INPs were
often associated with lower-latitude source regions such as the Hudson Bay area, eastern
Greenland, or north-western continental Canada. On the other hand, the lowest
concentrations were often associated with regions further north of the sampling sites and
over Baffin Bay. A weak correlation was observed between INP concentrations and the time
the air mass spent over bare land, and a weak negative correlation was observed between
INP concentrations and the time the air mass spent over ice and open water. These
combined results suggest that mineral dust from local sources is an important contributor
to the INP population in the Canadian Arctic marine boundary layer during summer 2014.</p> |
| url |
https://www.atmos-chem-phys.net/19/1027/2019/acp-19-1027-2019.pdf |
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doaj-cce949c3bcf7448ab8bcf53091a5da232020-11-25T01:18:36ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242019-01-01191027103910.5194/acp-19-1027-2019Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014V. E. Irish0S. J. Hanna1M. D. Willis2S. China3J. L. Thomas4J. L. Thomas5J. J. B. Wentzell6A. Cirisan7M. Si8W. R. Leaitch9J. G. Murphy10J. P. D. Abbatt11A. Laskin12E. Girard13E. Girard14A. K. Bertram15Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver BC, V6T 1Z1, CanadaDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver BC, V6T 1Z1, CanadaDepartment of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario, ON M5S 3H6, CanadaEnvironmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USAUniversité Grenoble Alpes, CNRS, IRD, Grenoble-INP, IGE, 38000 Grenoble, FranceLaboratoire Atmosphères, Milieux et Observations Spatiales, Université Pierre et Marie Curie, 4 place Jussieu, 75252 Paris CEDEX 05, FranceAir Quality Research Division, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, CanadaDépartement des sciences de la Terre et de l'atmosphère, Université du Québec à Montréal, 201, avenue du Président-Kennedy, Montréal, Québec, QC H2X 3Y7, CanadaDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver BC, V6T 1Z1, CanadaClimate Research Division, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto ON, M3H 5T4, CanadaDepartment of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario, ON M5S 3H6, CanadaDepartment of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario, ON M5S 3H6, CanadaDepartment of Chemistry, Purdue University, West Lafayette, IN 47907, USADépartement des sciences de la Terre et de l'atmosphère, Université du Québec à Montréal, 201, avenue du Président-Kennedy, Montréal, Québec, QC H2X 3Y7, CanadadeceasedDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver BC, V6T 1Z1, Canada<p>Ice nucleating particles (INPs) in the Arctic can influence climate and precipitation in the region; yet our understanding of the concentrations and sources of INPs in this region remain uncertain. In the following, we (1) measured concentrations of INPs in the immersion mode in the Canadian Arctic marine boundary layer during summer 2014 on board the CCGS <i>Amundsen</i>, (2) determined ratios of surface areas of mineral dust aerosol to sea spray aerosol, and (3) investigated the source region of the INPs using particle dispersion modelling. Average concentrations of INPs at <span class="inline-formula">−15</span>, <span class="inline-formula">−20</span>, and <span class="inline-formula">−25</span> <span class="inline-formula"><sup>∘</sup>C</span> were 0.005, 0.044, and 0.154 <span class="inline-formula">L<sup>−1</sup></span>, respectively. These concentrations fall within the range of INP concentrations measured in other marine environments. For the samples investigated the ratio of mineral dust surface area to sea spray surface area ranged from 0.03 to 0.09. Based on these ratios and the ice active surface site densities of mineral dust and sea spray aerosol determined in previous laboratory studies, our results suggest that mineral dust is a more important contributor to the INP population than sea spray aerosol for the samples analysed. Based on particle dispersion modelling, the highest concentrations of INPs were often associated with lower-latitude source regions such as the Hudson Bay area, eastern Greenland, or north-western continental Canada. On the other hand, the lowest concentrations were often associated with regions further north of the sampling sites and over Baffin Bay. A weak correlation was observed between INP concentrations and the time the air mass spent over bare land, and a weak negative correlation was observed between INP concentrations and the time the air mass spent over ice and open water. These combined results suggest that mineral dust from local sources is an important contributor to the INP population in the Canadian Arctic marine boundary layer during summer 2014.</p>https://www.atmos-chem-phys.net/19/1027/2019/acp-19-1027-2019.pdf |