DOI: 10.1175/JCLI-D-14-00165.1
Scopus记录号: 2-s2.0-84926059668
论文题名: Mechanisms of forced tropical meridional energy flux change
作者: Hill S.A. ; Ming Y. ; Held I.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 5 起始页码: 1725
结束页码: 1742
语种: 英语
Scopus关键词: Aerosols
; Atmospheric movements
; Atmospheric temperature
; Cells
; Climate change
; Clouds
; Cytology
; Earth atmosphere
; Greenhouse gases
; Surface waters
; Tropics
; Anthropogenic effects
; Atmospheric circulation
; Energy transport
; Hadley circulation
; Mass fluxes/transport
; Meridional overturning circulations
; Oceanography
; aerosol
; anomaly
; anthropogenic effect
; atmospheric circulation
; atmospheric general circulation model
; energy flux
; Hadley cell
; mass transport
; Northern Hemisphere
; sea surface temperature
英文摘要: Anthropogenically forced changes to the mean and spatial pattern of sea surface temperatures (SSTs) alter tropical atmospheric meridional energy transport throughout the seasonal cycle-in total, its partitioning between the Hadley cells and eddies and, for the Hadley cells, the relative roles of the mass flux and the gross moist stability (GMS). The authors investigate this behavior using an atmospheric general circulation model forced with SST anomalies caused by either historical greenhouse gas or aerosol forcing, dividing the SST anomalies into two components: the tropicalmean SST anomaly applied uniformly and the full SST anomalies minus the tropical mean. For greenhouse gases, the polar-amplified SST spatial pattern partially negates enhanced eddy poleward energy transport driven by mean warming. Both SST components weaken winter Hadley cell circulation and alter GMS. The Northern Hemisphere-focused aerosol cooling induces northward energy flux anomalies in the deep tropics, which manifest partially via strengthened northern and weakened southern Hadley cell overturning. Aerosol-induced GMS changes also contribute to the northward energy fluxes. A simple thermodynamic scaling qualitatively captures these changes, although it performs less well for the greenhouse gas simulations. The scaling provides an explanation for the tight correlation demonstrated in previous studies between shifts in the intertropical convergence zone and crossequatorial energy fluxes. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50441
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Recommended Citation:
Hill S.A.,Ming Y.,Held I.M.. Mechanisms of forced tropical meridional energy flux change[J]. Journal of Climate,2015-01-01,28(5)