Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean
Temperature and particle number concentration profiles were measured at small height intervals above open and frozen leads and snow surfaces in the central Arctic. The device used was a gradient pole designed to investigate potential particle sources over the central Arctic Ocean. The collected data...
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ftcopernicus:oai:publications.copernicus.org:amt11472 2023-05-15T14:50:49+02:00 Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean Held, A. Orsini, D. A. Vaattovaara, P. Tjernström, M. Leck, C. 2018-01-15 application/pdf https://doi.org/10.5194/amt-4-1603-2011 https://amt.copernicus.org/articles/4/1603/2011/ eng eng doi:10.5194/amt-4-1603-2011 https://amt.copernicus.org/articles/4/1603/2011/ eISSN: 1867-8548 Text 2018 ftcopernicus https://doi.org/10.5194/amt-4-1603-2011 2020-07-20T16:26:02Z Temperature and particle number concentration profiles were measured at small height intervals above open and frozen leads and snow surfaces in the central Arctic. The device used was a gradient pole designed to investigate potential particle sources over the central Arctic Ocean. The collected data were fitted according to basic logarithmic flux-profile relationships to calculate the sensible heat flux and particle deposition velocity. Independent measurements by the eddy covariance technique were conducted at the same location. General agreement was observed between the two methods when logarithmic profiles could be fitted to the gradient pole data. In general, snow surfaces behaved as weak particle sinks with a maximum deposition velocity v d = 1.3 mm s −1 measured with the gradient pole. The lead surface behaved as a weak particle source before freeze-up with an upward flux F c = 5.7 × 10 4 particles m −2 s −1 , and as a relatively strong heat source after freeze-up, with an upward maximum sensible heat flux H = 13.1 W m −2 . Over the frozen lead, however, we were unable to resolve any significant aerosol profiles. Text Arctic Arctic Ocean Copernicus Publications: E-Journals Arctic Arctic Ocean Atmospheric Measurement Techniques 4 8 1603 1616 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Temperature and particle number concentration profiles were measured at small height intervals above open and frozen leads and snow surfaces in the central Arctic. The device used was a gradient pole designed to investigate potential particle sources over the central Arctic Ocean. The collected data were fitted according to basic logarithmic flux-profile relationships to calculate the sensible heat flux and particle deposition velocity. Independent measurements by the eddy covariance technique were conducted at the same location. General agreement was observed between the two methods when logarithmic profiles could be fitted to the gradient pole data. In general, snow surfaces behaved as weak particle sinks with a maximum deposition velocity v d = 1.3 mm s −1 measured with the gradient pole. The lead surface behaved as a weak particle source before freeze-up with an upward flux F c = 5.7 × 10 4 particles m −2 s −1 , and as a relatively strong heat source after freeze-up, with an upward maximum sensible heat flux H = 13.1 W m −2 . Over the frozen lead, however, we were unable to resolve any significant aerosol profiles. |
format |
Text |
author |
Held, A. Orsini, D. A. Vaattovaara, P. Tjernström, M. Leck, C. |
spellingShingle |
Held, A. Orsini, D. A. Vaattovaara, P. Tjernström, M. Leck, C. Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean |
author_facet |
Held, A. Orsini, D. A. Vaattovaara, P. Tjernström, M. Leck, C. |
author_sort |
Held, A. |
title |
Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean |
title_short |
Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean |
title_full |
Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean |
title_fullStr |
Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean |
title_full_unstemmed |
Near-surface profiles of aerosol number concentration and temperature over the Arctic Ocean |
title_sort |
near-surface profiles of aerosol number concentration and temperature over the arctic ocean |
publishDate |
2018 |
url |
https://doi.org/10.5194/amt-4-1603-2011 https://amt.copernicus.org/articles/4/1603/2011/ |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
eISSN: 1867-8548 |
op_relation |
doi:10.5194/amt-4-1603-2011 https://amt.copernicus.org/articles/4/1603/2011/ |
op_doi |
https://doi.org/10.5194/amt-4-1603-2011 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
4 |
container_issue |
8 |
container_start_page |
1603 |
op_container_end_page |
1616 |
_version_ |
1766321862238797824 |