Analysis of extreme high temperature conditions over Gujarat

Abstract

HkweaMyh; m".ku dk ,d ifj.kke ;g gS fd blds dkj.k fofHkUu iSekus@rhozrk ij fo’o ds fofHkUu Hkkxksa esa pØokr] Hkkjh o"kkZ] ck<+] lw[kk vkSj yw vkfn tSlh izfrdwy ?kVukvksa dh ckjEckjrk esa o`f) gqbZ gSA bl {ks= dh lkekftd&vkfFkZd le`f) ds fy, tyok;q ifjorZu vkSj izfrdwy ekSle dh ?kVukvksa dk ?kVuk fpark dk eq[; dkj.k gSA ekpZ ls ebZ 2010 dh vof/k ds nkSjku xqtjkr esa e/;e ls Hkh"k.k yw dh fLFkfr cuh jgh ftuesa xqtjkr ds vf/kdka’k ftyksa esa yw okys fnuksa dks fjdkWMZ fd;k x;kA ;g v/;;u xqtjkr esa vf/kdre pje rkieku dh fLFkfr;ksa dh n’kdh; tyok;q dk fo’ys"k.k djus ds fy, fd;k x;kA bl v/;;u esa fd, x, n’kdh; fo’ys"k.k ls irk pyk gS fd igys ds rhu n’kdksa dh rqyuk esa  70 izfr’kr ls vf/kd LVs’kuksa esa e/;e yw ds fnuksa dh la[;k vkSj izp.M yw ds fnuksa dh la[;k vf/kd jgh gSA vgenkckn] cM+ksnk] jktdksV] cukldkaBk  ¼Mhlk½] lkcjdkaBk ¼bMj½ ds ftyksa esa fiNys n’kd ¼2001&2010½ esa pyh e/;e yw esa o`f) dk irk pyk gSA Hkkjr ekSle foKku foHkkx ds fofHkUUk LVs’kuksa tSls cM+ksnk] Mhlk] dkaMyk vkSj bMj esa fiNys n’kd esa vf/kd vf/kdre rkieku fjdkWMZ fd;k x;k gSA xqtjkr ds leqnzh rV ls nwj ds ik¡p LVs’kuksa dh xzh"e _rq dh vf/kdre rkieku dh folaxfr;ksa ls Hkh fiNys n’kd esa mPp ldkjkRed folaxfr ¼4 fMxzh ls- rd½ dk irk pyrk gSA bl 'kks/k i= esa ebZ 2010 dh izpaM yw ds nkSjku flukWfIVd fLFkfr dk fo’ys"k.k Hkh fd;k x;k gSA

 One of the  fallouts of the global warming is the increase in frequency of extreme events like cyclones, heavy rainfall, flood, droughts and heat waves etc, across different parts of the world on varying scale/intensity. Climate variability and occurrence of extreme weather events are the major concerns for socio-economic well being of the region. During the period March to May 2010, Gujarat experienced moderate to severe heat wave condition with record number of days with heat waves in most of the districts of Gujarat. This study was undertaken to analyze the decadal climatology of extreme high temperature conditions over Gujarat. The decadal analysis carried out in the study indicated that the number of moderate heat wave days and severe heat wave days are highest in the last decade as compared to earlier three decades in more than 70 per cent of the stations. The districts of Ahmedabad, Baroda, Rajkot, Banaskantha (Deesa) and Sabarkantha (Idar) show increase in moderate heat waves in the last decade (2001-2010). Various IMD Stations like Baroda, Deesa, Kandla and Idar have recorded all time highest temperatures in the last decade. The summer maximum temperature anomalies of five non coastal stations of Gujarat also indicate a high positive anomaly (upto 4 °C) prevalent in the last decade. The paper also analyses the synoptic condition during the severe heat wave of May, 2010.