DOI: 10.1007/s00382-013-1739-3
Scopus记录号: 2-s2.0-84879550007
论文题名: Diabatic heating profiles over the continental convergence zone during the monsoon active spells
作者: Chattopadhyay R. ; Sur S. ; Joseph S. ; Sahai A.K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 1 起始页码: 205
结束页码: 226
语种: 英语
英文摘要: The present paper aims to bring out the robust common aspects of spatio-temporal evolution of diabatic heating during the monsoon intraseasonal active phases over the continental tropical convergence zone (CTCZ). The robustness of spatio-temporal features is determined by comparing the two state-of-the art reanalyses: NCEP Climate Forecast System reanalysis and Modern ERA Retrospective Analysis. The inter-comparison is based on a study period of 26 years (1984-2009). The study confirms the development of deep heating over the CTCZ region during the active phase and is consistent between the two datasets. However, the detailed temporal evolution of the vertical structure (e.g., vertical tilts) of heating differs at times. The most important common feature from both the datasets is the significant vertical redistribution of heating with the development of shallow (low level) heating and circulation over the CTCZ region 3-7 days after the peak active phase. The shallow circulation is found to be associated with increased vertical shear and relative vorticity over certain regions in the subcontinent. This increased vertical shear and relative vorticity in the lower levels could be crucial in the sustenance of rainfall after the peak active phase. Model experiments with linear dynamics affirm the role of shallow convection in increasing the lower level circulation as observed. © 2013 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54880
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Indian Institute of Tropical Meteorology, Pune, 411008, India
Recommended Citation:
Chattopadhyay R.,Sur S.,Joseph S.,et al. Diabatic heating profiles over the continental convergence zone during the monsoon active spells[J]. Climate Dynamics,2013-01-01,41(1)