Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka
Ice crystals, also known as diamond dust, are suspended in the boundary layer air under clear sky conditions during most of the Arctic winter in Northern Canada. Occasionally ice crystal events can produce significantly thick layers with optical depths in excess of 2.0 even in the absence of liquid...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00045934 2023-05-15T14:58:41+02:00 Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka Lesins, G. Bourdages, L. Duck, T. J. Drummond, J. R. Eloranta, E. W. Walden, V. P. 2009-03 electronic https://doi.org/10.5194/acp-9-1847-2009 https://noa.gwlb.de/receive/cop_mods_00045934 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045554/acp-9-1847-2009.pdf https://acp.copernicus.org/articles/9/1847/2009/acp-9-1847-2009.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-9-1847-2009 https://noa.gwlb.de/receive/cop_mods_00045934 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045554/acp-9-1847-2009.pdf https://acp.copernicus.org/articles/9/1847/2009/acp-9-1847-2009.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2009 ftnonlinearchiv https://doi.org/10.5194/acp-9-1847-2009 2022-02-08T22:39:18Z Ice crystals, also known as diamond dust, are suspended in the boundary layer air under clear sky conditions during most of the Arctic winter in Northern Canada. Occasionally ice crystal events can produce significantly thick layers with optical depths in excess of 2.0 even in the absence of liquid water clouds. Four case studies of high optical depth ice crystal events at Eureka in the Nunavut Territory of Canada during the winter of 2006/07 are presented. They show that the measured ice crystal surface infrared downward radiative forcing ranged from 8 to 36 W m−2 in the wavelength band from 5.6 to 20 μm for 532 nm optical depths ranging from 0.2 to 1.7. MODIS infrared and visible images and the operational radiosonde wind profile were used to show that these high optical depth events were caused by surface snow being blown off 600 to 800 m high mountain ridges about 20 to 30 km North-West of Eureka and advected by the winds towards Eureka as they settled towards the ground within the highly stable boundary layer. This work presents the first study that demonstrates the important role that surrounding topography plays in determining the occurrence of high optical depth ice crystal events from residual blowing snow that becomes a source of boundary layer ice crystals distinct from the classical diamond dust phenomenon. Article in Journal/Newspaper Arctic Eureka Nunavut Niedersächsisches Online-Archiv NOA Arctic Canada Eureka ENVELOPE(-85.940,-85.940,79.990,79.990) Nunavut Atmospheric Chemistry and Physics 9 6 1847 1862 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Lesins, G. Bourdages, L. Duck, T. J. Drummond, J. R. Eloranta, E. W. Walden, V. P. Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka |
topic_facet |
article Verlagsveröffentlichung |
description |
Ice crystals, also known as diamond dust, are suspended in the boundary layer air under clear sky conditions during most of the Arctic winter in Northern Canada. Occasionally ice crystal events can produce significantly thick layers with optical depths in excess of 2.0 even in the absence of liquid water clouds. Four case studies of high optical depth ice crystal events at Eureka in the Nunavut Territory of Canada during the winter of 2006/07 are presented. They show that the measured ice crystal surface infrared downward radiative forcing ranged from 8 to 36 W m−2 in the wavelength band from 5.6 to 20 μm for 532 nm optical depths ranging from 0.2 to 1.7. MODIS infrared and visible images and the operational radiosonde wind profile were used to show that these high optical depth events were caused by surface snow being blown off 600 to 800 m high mountain ridges about 20 to 30 km North-West of Eureka and advected by the winds towards Eureka as they settled towards the ground within the highly stable boundary layer. This work presents the first study that demonstrates the important role that surrounding topography plays in determining the occurrence of high optical depth ice crystal events from residual blowing snow that becomes a source of boundary layer ice crystals distinct from the classical diamond dust phenomenon. |
format |
Article in Journal/Newspaper |
author |
Lesins, G. Bourdages, L. Duck, T. J. Drummond, J. R. Eloranta, E. W. Walden, V. P. |
author_facet |
Lesins, G. Bourdages, L. Duck, T. J. Drummond, J. R. Eloranta, E. W. Walden, V. P. |
author_sort |
Lesins, G. |
title |
Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka |
title_short |
Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka |
title_full |
Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka |
title_fullStr |
Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka |
title_full_unstemmed |
Large surface radiative forcing from topographic blowing snow residuals measured in the High Arctic at Eureka |
title_sort |
large surface radiative forcing from topographic blowing snow residuals measured in the high arctic at eureka |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doi.org/10.5194/acp-9-1847-2009 https://noa.gwlb.de/receive/cop_mods_00045934 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045554/acp-9-1847-2009.pdf https://acp.copernicus.org/articles/9/1847/2009/acp-9-1847-2009.pdf |
long_lat |
ENVELOPE(-85.940,-85.940,79.990,79.990) |
geographic |
Arctic Canada Eureka Nunavut |
geographic_facet |
Arctic Canada Eureka Nunavut |
genre |
Arctic Eureka Nunavut |
genre_facet |
Arctic Eureka Nunavut |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-9-1847-2009 https://noa.gwlb.de/receive/cop_mods_00045934 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045554/acp-9-1847-2009.pdf https://acp.copernicus.org/articles/9/1847/2009/acp-9-1847-2009.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-9-1847-2009 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
9 |
container_issue |
6 |
container_start_page |
1847 |
op_container_end_page |
1862 |
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1766330821559451648 |