DOI: 10.1175/JCLI-D-14-00494.1
Scopus记录号: 2-s2.0-84938953977
论文题名: MJO intensification with warming in the superparameterized CESM
作者: Arnold N.P. ; Branson M. ; Kuang Z. ; Randall D.A. ; Tziperman E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 7 起始页码: 2706
结束页码: 2724
语种: 英语
Scopus关键词: Advection
; Atmospheric thermodynamics
; Budget control
; Carbon dioxide
; Climate change
; Climate models
; Global warming
; Heat flux
; Atmosphere-ocean interactions
; Climate variability
; Cloud resolving model
; Heat budgets/fluxes
; Madden-Julian oscillation
; Moisture/moisture budgets
; Climatology
; air-sea interaction
; atmospheric moisture
; climate variation
; global warming
; heat budget
; latent heat flux
; Madden-Julian oscillation
; seasonal variation
英文摘要: The Madden-Julian oscillation (MJO) is the dominant mode of tropical intraseasonal variability, characterized by an eastward-propagating envelope of convective anomalies with a 30-70-day time scale. Here, the authors report changes in MJO activity across coupled simulations with a superparameterized version of the NCAR Community Earth System Model. They find that intraseasonal OLR variance nearly doubles between a preindustrial control run and a run with 4×CO2. Intraseasonal precipitation increases at a rate of roughly 10% per 1 K of warming, and MJO events become 20%-30% more frequent. Moist static energy (MSE) budgets of composite MJO events are calculated for each scenario, and changes in budget terms are used to diagnose the physical processes responsible for changes in the MJO with warming. An increasingly positive contribution from vertical advection is identified as the most likely cause of the enhanced MJO activity. A decomposition links the changes in vertical advection to a steepening of the mean MSE profile, which is a robust thermodynamic consequence of warming. Surface latent heat flux anomalies are a significant sink of MJO MSE at 1×CO2, but this damping effect is reduced in the 4×CO2 case. This work has implications for organized tropical variability in past warm climates as well as future global warming scenarios. © 2015 American Meteorological Society. 资助项目: NSF, Norsk Sykepleierforbund
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50888
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 Atmospheric Science, Colorado State University, Fort Collins, CO, United States; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States
Recommended Citation:
Arnold N.P.,Branson M.,Kuang Z.,et al. MJO intensification with warming in the superparameterized CESM[J]. Journal of Climate,2015-01-01,28(7)