DOI: 10.1175/JCLI-D-12-00229.1
Scopus记录号: 2-s2.0-84880283041
论文题名: Interannual variability of monsoon precipitation and local subcloud equivalent potential temperature
作者: Hurley J.V. ; Boos W.R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 23 起始页码: 9507
结束页码: 9527
语种: 英语
Scopus关键词: Hydrologic cycles
; Interannual variability
; Large-scale motions
; Meridional circulation
; Monsoon precipitation
; Monsoons
; Ocean surface temperature
; Potential temperature
; Arid regions
; Atmospheric pressure
; Atmospheric temperature
; Precipitation (chemical)
; Precipitation (meteorology)
; Atmospheric thermodynamics
; annual variation
; climatology
; El Nino-Southern Oscillation
; hydrological cycle
; monsoon
; potential temperature
; precipitation (climatology)
英文摘要: The interannual variability of monsoon precipitation is described in the context of a convective quasi-equilibrium framework. Using two reanalysis products and two global precipitation datasets, the authors examine linear relationships between seasonal anomalies of precipitation and subcloud equivalent potential temperature (θeb) local to six monsoon regions. This approach provides a single near-surface thermodynamically relevant variable over both land and ocean, extending previous studies of interannual monsoon variability that emphasized ocean surface temperatures. After removing the variability linearly associated with an index of the El Niño-Southern Oscillation, positive monsoon precipitation anomalies are shown to be associated with enhanced θeb local to and slightly poleward of the climatological θeb maximum. The variations in continental θeb local to the monsoon precipitation maxima are mainly due to variations in subcloud specific humidity, with changes in subcloud temperature having the opposite sign. Motivated by the fact that some of these subcloud humidity anomalies occur over deserts poleward of monsoon regions, the relationship of 700-hPa flow with precipitation is examined, and enhanced precipitation in several regions is found to covary with the properties of shallow meridional circulations. The implications of these results for the understanding of monsoon interannual variability are discussed. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51505
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Geology and Geophysics, Yale University, 210 Whitney Ave., New Haven, CT 06511, United States
Recommended Citation:
Hurley J.V.,Boos W.R.. Interannual variability of monsoon precipitation and local subcloud equivalent potential temperature[J]. Journal of Climate,2013-01-01,26(23)