Relationship between Iran Surface Pressure and India Summer Monsoon

  • Ramesh Kumar Yadav Indian Institute of Tropical Meteorology, Pashan, Pune-411008
Keywords: South-west monsoon, Blocking ridges, Westerly trough, Surface pressure, Very heavy rainfall event and Tibetan High.

Abstract

The study examines the relationship between Indian summer monsoon rainfall and the Iran surface pressure.
The analysis is based on trend analysis, correlations and regressions performed using ERA-Interim data and
India Meteorological Department rainfall records based on station data from 1979 to 2015. The summer season
shows decreasing trends in surface pressure and increasing trend in rainfall over Iran and NW India,
respectively. The decrease in surface pressure over Iran is associated with the anomalous cyclonic circulation
with northerlies and westerlies over Persian Gulf and north Arabian Sea, respectively. These intensify the
climatological background cross equatorial flow over Arabian Sea and further converge towards NW India with
abundant of moisture supply, favoring deep convection with active Indian summer monsoon.

Published
2024-02-20
How to Cite
Yadav, R. (2024). Relationship between Iran Surface Pressure and India Summer Monsoon. Vayumandal, 44(1), 23-30. Retrieved from https://vayumandal.imetsociety.org/index.php/Vayumandal/article/view/89
Issue
Vol 44 No 1 (2018): VAYUMANDAL
Section
Research Paper

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