Impact of KALPANA-1 cloud motion vector in the analysis and forecast of IMD operational NWP system

Abstract

lkj & 12 flrEcj 2002 ls ekSle foKku ds fy, lefiZr Hkkjr ds igys mixzg dYiuk-1 ds fØ;k’khy gksus ds lkFk gh fgan egklkxj ds vuqiyC/k vk¡dM+s okys {ks= ds mixzg ls izkIr iouksa ds vk¡dM+ksa ds {ks= foLrkj ls lq/kkj gqvk gS A bu vk¡dM+ksa ds miyC/k gks tkus ls Hkkjr ekSle foKku foHkkx ¼Hkk-ekS-fo-fo-½ dh izpkyukRed ,u- MCY;w- ih- iz.kkyh esa buds izHkko dh tk¡p djus dh ,d ubZ laHkkouk mRiUu gqbZ gS A bl ’kks/k Ik= esa o"kZ 2003 dh ekulwu o"kkZ ij fd, x, iz;ksxksa ds vk/kkj ij Hkkjr ekSle foKku foHkkx dh ,u- MCY;w- ih- iz.kkyh esa dYiyk-1 ls izkIr gq, lh- ,e- oh- vk¡dM+ksa ds izHkko ds ckjs esa crk;k x;k gS A bl fun’kZ ls izkIr gq, iou ds vfrfjDr vk¡dM+ksa dk izHkko lkFkZd vkSj ykHkdkjh ik;k x;k gS A 

The coverage of satellite derived winds over the data gap Indian Ocean region has improved with the operation of India’s first dedicated satellite for meteorology KALPANA-1 since 12 September 2002. Availability of these data has opened up a new possibility to examine the impact of these data in the operational NWP system of India Meteorological Department (IMD). In this paper, impact of KALPANA-1 CMV  data in the  NWP  system  of IMD has been presented based on the experiments carried-out for the monsoon 2003.  The impact of additional wind data in the model is found to be significant and beneficial.