Investigation on rainfall and temperature trend and extremes in Haryana
| dc.contributor.advisor | Diwan Singh | |
| dc.contributor.author | Mamta | |
| dc.date.accessioned | 2017-01-27T09:41:59Z | |
| dc.date.available | 2017-01-27T09:41:59Z | |
| dc.date.issued | 2016 | |
| dc.description.abstract | This study analyzes 26 climate extreme indices over five stations viz., Ambala, Bawal, Hisar, Karnal and Sirsa in the state of Haryana (India) using observed data for daily maximum and minimum temperatures and total daily rainfall for the period 1985–2014. A set of eleven rainfall and fifteen temperature indices were adopted and analysed with a main focus on the temporal distribution, spatial distribution and trend of daily extremes occurrences. These Statistical trend analiyse techniques, namely the Mann-Kendall test and Sen’s slope estimator were used to examine the trend. Both positive and negative trends were observed in the extremes events of temperature in all five stations studied. The temporal distribution of rainfall indices in Haryana showed an increase in rainfall intensity (RX1day & RX5day) however the duration indices showed a decline (CWD & CDD). Temporal distribution of temperature indices viz., TNn, TXn, TN10p, TX10p, CSDI, GSL, WSDI and TX90p indicaed that these indices had a decreasing order while, the indices TN90p, TR20p were in the increasing order reflecting thereby decrease in the DTR. Spatially, the northern most parts including Panchkula & Yamunanagar had heavier rainfall than the western parts in the Sirsa district during the study period. Spatial distribution of temperature indices on annual scale in the state suggested that the northern most parts in the state had least occurrence of hot extremes events, while the western parts had the highest hot events occurrence. However, the trend analysis of rainfall related climate indicators based on annual, seasonal and monthly values revealed no significant trend except at Bawal station. Variability of rainfall indices viz., CDD, SDII and PRCPTOT showed less variation in the decade 2005-2014 and the indices viz., R95p, R99p RX1day, RX5day, R2.5, R10, R20, and CWD showed no definite pattern over different decadal time periods. The annual trend and slope values of temperature related climate change indicators for five locations in the state of Haryana indicated a decrease in the cold extremes event (TXn, TNn & TN10p). Further, the value of Mann-Kendall test statistic Z and Sen’s slope test revealed minimum temperature extremes (TNn and TXn) have stronger trend and steeper slope at all stations. The hot extremes events (TR20, TN90p) evidenced an increasing order. The trend and slope of night extremes (TR20 and TN90) were more potent than those in day extremes (TNn, TXn,) resulting in the decrease of day-night temperature variation as demonstrated by constricting diurnal temperature range (DTR). Overall, the occurrence of extremes events particularly the hike in frequency of night temperature extreme indices in the state is a cause for concern. These indices vary significantly with region and season. In addition, the temporal distribution and the trends of extremes both temperature and rainfall events suggest of an enhanced wetting and warming conditions over the entire state. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/97552 | |
| dc.language.iso | en | en_US |
| dc.publisher | CCSHAU | en_US |
| dc.sub | Agricultural Meteorology | en_US |
| dc.these.type | M.Sc | |
| dc.title | Investigation on rainfall and temperature trend and extremes in Haryana | en_US |
| dc.type | Thesis | en_US |
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