Observations of atmospheric chemical deposition to high Arctic snow
Rapidly rising temperatures and loss of snow and ice cover have demonstrated the unique vulnerability of the high Arctic to climate change. There are major uncertainties in modelling the chemical depositional and scavenging processes of Arctic snow. To that end, fresh snow samples collected on avera...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-17-5775-2017 https://www.atmos-chem-phys.net/17/5775/2017/ |
id |
ftcopernicus:oai:publications.copernicus.org:acp55483 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:acp55483 2023-05-15T14:47:49+02:00 Observations of atmospheric chemical deposition to high Arctic snow Macdonald, Katrina M. Sharma, Sangeeta Toom, Desiree Chivulescu, Alina Hanna, Sarah Bertram, Allan K. Platt, Andrew Elsasser, Mike Huang, Lin Tarasick, David Chellman, Nathan McConnell, Joseph R. Bozem, Heiko Kunkel, Daniel Lei, Ying Duan Evans, Greg J. Abbatt, Jonathan P. D. 2018-10-02 application/pdf https://doi.org/10.5194/acp-17-5775-2017 https://www.atmos-chem-phys.net/17/5775/2017/ eng eng doi:10.5194/acp-17-5775-2017 https://www.atmos-chem-phys.net/17/5775/2017/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-17-5775-2017 2019-12-24T09:51:28Z Rapidly rising temperatures and loss of snow and ice cover have demonstrated the unique vulnerability of the high Arctic to climate change. There are major uncertainties in modelling the chemical depositional and scavenging processes of Arctic snow. To that end, fresh snow samples collected on average every 4 days at Alert, Nunavut, from September 2014 to June 2015 were analyzed for black carbon, major ions, and metals, and their concentrations and fluxes were reported. Comparison with simultaneous measurements of atmospheric aerosol mass loadings yields effective deposition velocities that encompass all processes by which the atmospheric species are transferred to the snow. It is inferred from these values that dry deposition is the dominant removal mechanism for several compounds over the winter while wet deposition increased in importance in the fall and spring, possibly due to enhanced scavenging by mixed-phase clouds. Black carbon aerosol was the least efficiently deposited species to the snow. Text Arctic black carbon Climate change Nunavut Copernicus Publications: E-Journals Arctic Nunavut Atmospheric Chemistry and Physics 17 9 5775 5788 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Rapidly rising temperatures and loss of snow and ice cover have demonstrated the unique vulnerability of the high Arctic to climate change. There are major uncertainties in modelling the chemical depositional and scavenging processes of Arctic snow. To that end, fresh snow samples collected on average every 4 days at Alert, Nunavut, from September 2014 to June 2015 were analyzed for black carbon, major ions, and metals, and their concentrations and fluxes were reported. Comparison with simultaneous measurements of atmospheric aerosol mass loadings yields effective deposition velocities that encompass all processes by which the atmospheric species are transferred to the snow. It is inferred from these values that dry deposition is the dominant removal mechanism for several compounds over the winter while wet deposition increased in importance in the fall and spring, possibly due to enhanced scavenging by mixed-phase clouds. Black carbon aerosol was the least efficiently deposited species to the snow. |
format |
Text |
author |
Macdonald, Katrina M. Sharma, Sangeeta Toom, Desiree Chivulescu, Alina Hanna, Sarah Bertram, Allan K. Platt, Andrew Elsasser, Mike Huang, Lin Tarasick, David Chellman, Nathan McConnell, Joseph R. Bozem, Heiko Kunkel, Daniel Lei, Ying Duan Evans, Greg J. Abbatt, Jonathan P. D. |
spellingShingle |
Macdonald, Katrina M. Sharma, Sangeeta Toom, Desiree Chivulescu, Alina Hanna, Sarah Bertram, Allan K. Platt, Andrew Elsasser, Mike Huang, Lin Tarasick, David Chellman, Nathan McConnell, Joseph R. Bozem, Heiko Kunkel, Daniel Lei, Ying Duan Evans, Greg J. Abbatt, Jonathan P. D. Observations of atmospheric chemical deposition to high Arctic snow |
author_facet |
Macdonald, Katrina M. Sharma, Sangeeta Toom, Desiree Chivulescu, Alina Hanna, Sarah Bertram, Allan K. Platt, Andrew Elsasser, Mike Huang, Lin Tarasick, David Chellman, Nathan McConnell, Joseph R. Bozem, Heiko Kunkel, Daniel Lei, Ying Duan Evans, Greg J. Abbatt, Jonathan P. D. |
author_sort |
Macdonald, Katrina M. |
title |
Observations of atmospheric chemical deposition to high Arctic snow |
title_short |
Observations of atmospheric chemical deposition to high Arctic snow |
title_full |
Observations of atmospheric chemical deposition to high Arctic snow |
title_fullStr |
Observations of atmospheric chemical deposition to high Arctic snow |
title_full_unstemmed |
Observations of atmospheric chemical deposition to high Arctic snow |
title_sort |
observations of atmospheric chemical deposition to high arctic snow |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-17-5775-2017 https://www.atmos-chem-phys.net/17/5775/2017/ |
geographic |
Arctic Nunavut |
geographic_facet |
Arctic Nunavut |
genre |
Arctic black carbon Climate change Nunavut |
genre_facet |
Arctic black carbon Climate change Nunavut |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-17-5775-2017 https://www.atmos-chem-phys.net/17/5775/2017/ |
op_doi |
https://doi.org/10.5194/acp-17-5775-2017 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
17 |
container_issue |
9 |
container_start_page |
5775 |
op_container_end_page |
5788 |
_version_ |
1766318932060274688 |