DOI: 10.1002/jgrd.50292
论文题名: Drivers of projected change in arctic moist static energy transport
作者: Skific N. ; Francis J.A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 7 起始页码: 2748
结束页码: 2761
语种: 英语
Scopus关键词: Atmospheric humidity
; Conformal mapping
; Greenhouse gases
; Thermodynamics
; Troposphere
; Atmospheric dynamics
; Dry static energy
; Emission scenario
; Low pressure systems
; Moist static energy
; National center for atmospheric researches
; Specific humidity
; Thermodynamic factors
; Climate models
; arctic environment
; climate feedback
; climate modeling
; climate prediction
; energy flux
; greenhouse gas
; latent heat flux
; seasonality
; temperature gradient
; temporal variation
; thermodynamics
; troposphere
; twentieth century
; twenty first century
; warming
; Arctic
英文摘要: We explore annual and seasonal changes in moist static energy transport (MSE) into the Arctic over the 21st century as projected by the National Center for Atmospheric Research Community Climate System Model, version 3. Self-organizing maps are used to assess changes in MSE and its components - the latent heat flux and dry static energy flux (DSE) - across 70°N. These are computed from multilevel fields of specific humidity, meridional wind, geopotential, and temperature spanning periods in the 20th century (1960 to 1999) and the 21st century (2070 to 2089). The 21 st century simulation incorporates the Special Report on Emission Scenarios A2 scenario. A strong decrease in tropospheric DSE of about 9% by the end of 21st century offsets an increase in latent heat flux of about 20% relative to its 20th century average. The combined changes result in a total annual decrease in tropospheric MSE of about 3% by the late 21 st century. The difference, while statistically not significant, represents a weak negative feedback on Arctic amplification. Selforganizing maps also allow an attribution of changes in MSE to factors related to varying atmospheric dynamics and/or thermodynamics. A positive contribution to the MSE related to more frequent low pressure systems in high latitudes (dynamic factor) occurs in all seasons, particularly in the summer. The decrease in DSE is mainly due to a weakened poleward temperature gradient (thermodynamic factor) during all seasons except summer, which in turn is caused by amplified warming at high latitudes as a result of increased greenhouse gases. © 2013. American Geophysical Union. All Rights Reserved. 资助项目: ARC-0455262
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63830
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, United States
Recommended Citation:
Skific N.,Francis J.A.. Drivers of projected change in arctic moist static energy transport[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(7)