Article

Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences

, Volume 96, Issue 2, pp 147-167

On global summer monsoonal drought mechanics

  • M. Sankar-RaoAffiliated withDepartment of Aerospace Engineering and Centre for Atmospheric Sciences, Indian Institute of Science
  • , S. V. SachidanandaAffiliated withDepartment of Aerospace Engineering and Centre for Atmospheric Sciences, Indian Institute of Science

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Abstract

It is shown that within the framework of a linear five-level quasi-geostrophic steady state global model the middle latitude systems can always have significant influence on the Asian summer monsoonal system through the lower tropospheric monsoonal westerly window region around 80°E. It is hypothesized that quasistationarity of the middle latitude longwave systems results in stronger teleconnections through this window and the consequent monsoon breaks when the phase is right.

Keywords

Monsoon break Rossby waves middle latitudes teleconnections