DOI: 10.1175/JCLI-D-12-00431.1
Scopus记录号: 2-s2.0-84880695643
论文题名: Radiative and dynamical forcing of the surface and atmospheric temperature anomalies associated with the northern annular mode
作者: Deng Y. ; Park T.-W. ; Cai M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 14 起始页码: 5124
结束页码: 5138
语种: 英语
Scopus关键词: Atmospheric dynamics
; Meridional circulation
; Northern annular mode
; Subpolar North Atlantic
; Surface albedo change
; Surface temperature anomalies
; Surface temperatures
; Total energy balance
; Atmospheric radiation
; Atmospheric thermodynamics
; Climate change
; Dynamics
; Ozone
; Surface properties
; Troposphere
; Upper atmosphere
; Water vapor
; Weather forecasting
; Atmospheric temperature
; air temperature
; atmospheric dynamics
; climate feedback
; cooling
; energy balance
; Northern Hemisphere
; radiative forcing
; sea surface temperature
; temperature anomaly
; troposphere
; warming
; weather forecasting
; Atlantic Ocean
; Atlantic Ocean (North)
; North America
英文摘要: On the basis of the total energy balance within an atmosphere-surface column, an attribution analysis is conducted for the Northern Hemisphere (NH) atmospheric and surface temperature response to the northern annular mode (NAM) in boreal winter. The local temperature anomaly in the European Centre for Medium- Range Weather Forecasts (ECMWF) Interim Re-Analysis (ERA-Interim) is decomposed into partial temperature anomalies because of changes in atmospheric dynamics, water vapor, clouds, ozone, surface albedo, and surface dynamics with the coupled atmosphere-surface climate feedback-response analysis method (CFRAM). Large-scale ascent/descent as part of the NAM-related mean meridional circulation anomaly adiabatically drives the main portion of the observed zonally averaged atmospheric temperature response, particularly the tropospheric cooling/warming over northern extratropics. Contributions from diabatic processes are generally small but could be locally important, especially at lower latitudes where radiatively active substances such as clouds and water vapor are more abundant. For example, in the tropical upper troposphere and stratosphere, both cloud and ozone forcings are critical in leading to the observed NAM-related temperature anomalies. Radiative forcing due to changes in water vapor acts as the main driver of the surface warming of southern North America during a positive phase of NAM, with atmospheric dynamics providing additional warming. In the negative phase of NAM, surface albedo change drives the surface cooling of southern North America, with atmospheric dynamics providing additional cooling. Over the subpolar North Atlantic and northern Eurasia, atmospheric dynamical processes again become the largest contributor to the NAM-related surface temperature anomalies, although changes in water vapor and clouds also contribute positively to the observed surface temperature anomalies while change in surface dynamics contributes negatively to the observed temperature anomalies.©2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51775
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Department of Earth, Ocean and Atmospheric Science, The Florida State University, Tallahassee, FL, United States
Recommended Citation:
Deng Y.,Park T.-W.,Cai M.. Radiative and dynamical forcing of the surface and atmospheric temperature anomalies associated with the northern annular mode[J]. Journal of Climate,2013-01-01,26(14)