Interactions of arctic clouds, radiation, and sea ice in present-day and future climates
2016 Spring. Includes bibliographical references. The Arctic climate system involves complex interactions among the atmosphere, land surface, and the sea-ice-covered Arctic Ocean. Observed changes in the Arctic have emerged and projected climate trends are of significant concern. Surface warming ove...
Main Author: | |
---|---|
Other Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
Colorado State University. Libraries
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/10217/173355 |
id |
ftmountainschol:oai:mountainscholar.org:10217/173355 |
---|---|
record_format |
openpolar |
spelling |
ftmountainschol:oai:mountainscholar.org:10217/173355 2023-06-11T04:08:03+02:00 Interactions of arctic clouds, radiation, and sea ice in present-day and future climates Burt, Melissa Ann Randall, David A. Kreidenweis, Sonia M. Kummerow, Christian D. Betsill, Michele M. 2016-07-12T23:03:12Z born digital doctoral dissertations application/pdf http://hdl.handle.net/10217/173355 English eng eng Colorado State University. Libraries 2000-2019 - CSU Theses and Dissertations http://hdl.handle.net/10217/173355 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. Text 2016 ftmountainschol 2023-04-29T17:48:22Z 2016 Spring. Includes bibliographical references. The Arctic climate system involves complex interactions among the atmosphere, land surface, and the sea-ice-covered Arctic Ocean. Observed changes in the Arctic have emerged and projected climate trends are of significant concern. Surface warming over the last few decades is nearly double that of the entire Earth. Reduced sea-ice extent and volume, changes to ecosystems, and melting permafrost are some examples of noticeable changes in the region. This work is aimed at improving our understanding of how Arctic clouds interact with, and influence, the surface budget, how clouds influence the distribution of sea ice, and the role of downwelling longwave radiation (DLR) in climate change. In the first half of this study, we explore the roles of sea-ice thickness and downwelling longwave radiation in Arctic amplification. As the Arctic sea ice thins and ultimately disappears in a warming climate, its insulating power decreases. This causes the surface air temperature to approach the temperature of the relatively warm ocean water below the ice. The resulting increases in air temperature, water vapor and cloudiness lead to an increase in the surface downwelling longwave radiation, which enables a further thinning of the ice. This positive ice-insulation feedback operates mainly in the autumn and winter. A climate-change simulation with the Community Earth System Model shows that, averaged over the year, the increase in Arctic DLR is three times stronger than the increase in Arctic absorbed solar radiation at the surface. The warming of the surface air over the Arctic Ocean during fall and winter creates a strong thermal contrast with the colder surrounding continents. Sea-level pressure falls over the Arctic Ocean and the high-latitude circulation reorganizes into a shallow "winter monsoon." The resulting increase in surface wind speed promotes stronger surface evaporation and higher humidity over portions of the Arctic Ocean, thus reinforcing the ice-insulation ... Text Arctic Arctic Ocean Climate change Ice permafrost Sea ice Mountain Scholar (Digital Collections of Colorado and Wyoming) Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Mountain Scholar (Digital Collections of Colorado and Wyoming) |
op_collection_id |
ftmountainschol |
language |
English |
description |
2016 Spring. Includes bibliographical references. The Arctic climate system involves complex interactions among the atmosphere, land surface, and the sea-ice-covered Arctic Ocean. Observed changes in the Arctic have emerged and projected climate trends are of significant concern. Surface warming over the last few decades is nearly double that of the entire Earth. Reduced sea-ice extent and volume, changes to ecosystems, and melting permafrost are some examples of noticeable changes in the region. This work is aimed at improving our understanding of how Arctic clouds interact with, and influence, the surface budget, how clouds influence the distribution of sea ice, and the role of downwelling longwave radiation (DLR) in climate change. In the first half of this study, we explore the roles of sea-ice thickness and downwelling longwave radiation in Arctic amplification. As the Arctic sea ice thins and ultimately disappears in a warming climate, its insulating power decreases. This causes the surface air temperature to approach the temperature of the relatively warm ocean water below the ice. The resulting increases in air temperature, water vapor and cloudiness lead to an increase in the surface downwelling longwave radiation, which enables a further thinning of the ice. This positive ice-insulation feedback operates mainly in the autumn and winter. A climate-change simulation with the Community Earth System Model shows that, averaged over the year, the increase in Arctic DLR is three times stronger than the increase in Arctic absorbed solar radiation at the surface. The warming of the surface air over the Arctic Ocean during fall and winter creates a strong thermal contrast with the colder surrounding continents. Sea-level pressure falls over the Arctic Ocean and the high-latitude circulation reorganizes into a shallow "winter monsoon." The resulting increase in surface wind speed promotes stronger surface evaporation and higher humidity over portions of the Arctic Ocean, thus reinforcing the ice-insulation ... |
author2 |
Randall, David A. Kreidenweis, Sonia M. Kummerow, Christian D. Betsill, Michele M. |
format |
Text |
author |
Burt, Melissa Ann |
spellingShingle |
Burt, Melissa Ann Interactions of arctic clouds, radiation, and sea ice in present-day and future climates |
author_facet |
Burt, Melissa Ann |
author_sort |
Burt, Melissa Ann |
title |
Interactions of arctic clouds, radiation, and sea ice in present-day and future climates |
title_short |
Interactions of arctic clouds, radiation, and sea ice in present-day and future climates |
title_full |
Interactions of arctic clouds, radiation, and sea ice in present-day and future climates |
title_fullStr |
Interactions of arctic clouds, radiation, and sea ice in present-day and future climates |
title_full_unstemmed |
Interactions of arctic clouds, radiation, and sea ice in present-day and future climates |
title_sort |
interactions of arctic clouds, radiation, and sea ice in present-day and future climates |
publisher |
Colorado State University. Libraries |
publishDate |
2016 |
url |
http://hdl.handle.net/10217/173355 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Ice permafrost Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Ice permafrost Sea ice |
op_relation |
2000-2019 - CSU Theses and Dissertations http://hdl.handle.net/10217/173355 |
op_rights |
Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. |
_version_ |
1768381168497983488 |