View : 13 Download: 3

Recent changes in winter Arctic clouds and their relationships with sea ice and atmospheric conditions

Title
Recent changes in winter Arctic clouds and their relationships with sea ice and atmospheric conditions
Authors
Jun S.-Y.Ho C.-H.Jeong J.-H.Choi Y.-S.Kim B.-M.
Ewha Authors
최용상
SCOPUS Author ID
최용상scopus
Issue Date
2016
Journal Title
Tellus, Series A: Dynamic Meteorology and Oceanography
ISSN
0280-6495JCR Link
Citation
vol. 68
Keywords
Arctic cloudCloud feedbackCloud-moisture-temperature relationshipSea ice feedbackSea ice loss
Publisher
Co-Action Publishing
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Changes in Arctic clouds during boreal winter (December through February) and their relationship with sea ice and atmospheric conditions in recent decades have been examined using satellite and reanalysis data, and they are compared with output data from atmospheric general circulation model (AGCM) experiments. All the datasets used in this study consistently show that cloud amount over the Arctic Ocean (north of 67°N) decreased until the late 1990s but rapidly increased thereafter. Cloud increase in recent decade was a salient feature in the lower troposphere over a large part of the Arctic Sea, in association with obvious increase of lower tropospheric temperature and moisture. The comparison between the two periods before and after 1997 indicates that interannual covariability of Arctic clouds and lower tropospheric temperature and moisture was significantly enhanced after the late 1990s. Large reduction of sea ice cover during boreal winter decreased lower tropospheric static stability and deepened the planetary boundary layer. These changes led to an enhanced upward moisture transport and cloud formation, which led to considerable longwave radiative forcing and, as a result, strengthened the cloud-moisture-temperature relationship in the lower troposphere.AGCMexperiments under reduced sea ice conditions support those results obtained by satellite and reanalysis datasets reproducing the increases in cloud amount and lower tropospheric temperature and their enhanced covariability. © 2016 S.-Y. Jun et al.
DOI
10.3402/tellusa.v68.29130
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
Files in This Item:
Recent changes in winter Arctic clouds and their relationships with sea ice and atmospheric conditions.pdf(6.55 MB)Download
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE