DOI: 10.1175/JCLI-D-12-00272.1
Scopus记录号: 2-s2.0-84874816754
论文题名: Enhanced MJO-like variability at high SST
作者: Arnold N.P. ; Kuang Z. ; Tziperman E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 3 起始页码: 988
结束页码: 1001
语种: 英语
Scopus关键词: Anthropogenic global warming
; Community atmosphere model
; Intra-seasonal
; Intraseasonal variability
; Lower troposphere
; Madden-Julian oscillation
; Moist static energy
; Natural consequences
; Outgoing longwave radiation
; Physical process
; Sea surface temperatures
; Surface temperatures
; Tropical variabilty
; Vertical advection
; Warm climates
; Climate change
; Global warming
; Thermodynamics
; Atmospheric temperature
; advection
; air-sea interaction
; climate change
; global warming
; longwave radiation
; Madden-Julian oscillation
; relative humidity
; sea surface temperature
; seasonal variation
; thermodynamics
; troposphere
; vertical profile
英文摘要: The authors report a significant increase in Madden-Julian oscillation (MJO)-like variability in a superparameterized version of the NCAR Community Atmosphere Model run with high sea surface temperatures (SSTs). A series of aquaplanet simulations exhibit a tripling of intraseasonal outgoing longwave radiation variance as equatorial SST is increased from 26° to 35°C. The simulated intraseasonal variability also transitions from an episodic phenomenon to one with a semiregular period of 25 days. Moist static energy (MSE) budgets of composite MJO events are used to diagnose the physical processes responsible for the relationship with SST. This analysis points to an increasingly positive contribution from vertical advection, associated in part with a steepening of the mean vertical MSE profile in the lower troposphere. The change in MSE profile is a natural consequence of increasing SST while maintaining a moist adiabat with a fixed profile of relative humidity. This work has implications for tropical variability in past warm climates as well as anthropogenic global warming scenarios. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52021
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; Department of Earth and Planetary Sciences, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States
Recommended Citation:
Arnold N.P.,Kuang Z.,Tziperman E.. Enhanced MJO-like variability at high SST[J]. Journal of Climate,2013-01-01,26(3)