Droughts/Floods in Relation to El Nino/La Nina over All-India, East Uttar Pradesh and Some Stations of East Uttar Pradesh

Abstract

Monsoon is the seasonal change in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea. The year-to-year variability in monsoon rainfall could cause severe droughts and floods. El Nino is widely recognized as the main source of global climate variability. Thus, the interannual variation of summer rainfall over India is associated with El Nino/La Nina events. In the present study, the association between the seasonal rainfall series for all-India, East Uttar Pradesh (UP) and also their some stations with El Nino/La Nina events for the period 1971-2010 has been analyzed. The study shows that there is association of drought/flood condition with El Nino/La Nina, but it is not necessary that every drought/flood over all-India, East UP and some stations of East UP relate to the El Nino/La Nina.