Dependence of Findlater jet intensities during Active and Break spells Rainfall of Indian Summer Monsoon

M.V. Subrahmanyam; B. Pushpanjali

Volume : IV, Issue : XI, November - 2014

Dependence of Findlater jet intensities during Active and Break spells Rainfall of Indian Summer Monsoon

M. V. Subrahmanyam, B. Pushpanjali

Abstract :

Indian summer monsoon has a large inter–annual as well as intra–seasonal variability over temporal and spatial scales. One important synoptic feature associated with the onset of monsoon is the existence of a strong cross equatorial low level jet (LLJ), with its core around 850 hPa also known as Findlater jet (FLJ) over the Indian Ocean. In this article we studied the variation of FLJ intensities especially with respect to active and eak spells of monsoon for the period 1997–2007. The active and eak spells depends on monsoon intensity and rainfall over India. The FLJ intensities over Arabian Sea (AS) and the rainfall over Indian sub–continent are showing a clear idea of dependency on each other. FLJ intensities are higher during active spells than eak spells and consecutive rainfall is also higher. The variations during El Nino and La Nina are also discussed.