DOI: 10.1029/2018JD028505
Scopus记录号: 2-s2.0-85046536342
论文题名: The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo
作者: Frey W.R. ; Morrison A.L. ; Kay J.E. ; Guzman R. ; Chepfer H.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 9 起始页码: 4461
结束页码: 4475
语种: 英语
英文关键词: cloud
; cloud feedbacks
; sea ice
; Southern Ocean
; top-of-atmosphere albedo
Scopus关键词: albedo
; climate feedback
; cloud
; cloud cover
; concentration (composition)
; energy budget
; ice retreat
; lidar
; radiosonde
; sea ice
; shortwave radiation
; top of atmosphere
; Southern Ocean
英文摘要: When sea ice concentration decreases, surface albedo decreases. Yet the impact of Southern Ocean sea ice concentration decreases on top-of-atmosphere albedo is uncertain. Why? The cloud cover and opacity response to Southern Ocean sea ice variability has been challenging to quantify. Here we use observations to constrain the cloud response to Southern Ocean sea ice variability and assess the combined influence of sea ice and clouds on top-of-atmosphere albedo. We focus on the spring and summer seasons that dominate the high-latitude shortwave energy budget. To isolate the influence of sea ice concentration on clouds, we analyze spaceborne light detection and ranging (LIDAR) observations in regions where present-day sea ice concentration varies. During spring, low cloud cover is slightly (4%) higher over open water compared to sea ice. During summer, sea ice variability does not affect low cloud cover. During both spring and summer, cloud opacity is larger over open water than over sea ice due to a cloud phase shift from ice toward liquid with warming. Independent ship-based visual and radiosonde observations available during summer corroborate the LIDAR results. Even with the cloud response, satellite-observed top-of-atmosphere albedo is lower over open water than over sea ice. The observations show the cloud response to sea ice retreat with warming will not mask the surface albedo decrease. In other words, more shortwave radiation will be absorbed when Southern Ocean sea ice is lost. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113894
Appears in Collections: 气候减缓与适应
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; LMD/IPSL, CNRS, Ecole Polytechnique, Palaiseau, France; Sorbonne Université, École polytechnique, École normale supérieure, PSL Research University, CNRS, Paris, France
Recommended Citation:
Frey W.R.,Morrison A.L.,Kay J.E.,et al. The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(9)