Trends in Precipitation Extremes over India - (IMD), Pune

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Soman M K, Krishnakumar K, Singh N. 1988. Decreasing trend in the rainfall ofKerala. Current Science 57: 5 – 12.Zang X, Hogg W D, Mekis F. 2001. Spatial and temporal characteristics of heavyprecipitation events over Canada. Journal of Climatology 14: 1923 – 1936.14
Table – 1Extreme Rainfall Indices considered for the studyS. N. Description Code1. Heavy Precipitation days (Precipitation ≥ 7.5 cm) R7.5cm2. Very Heavy Precipitation Days (Precipitation ≥ 12.5 cm) R12.5cm3. Highest 1 day precipitation amount RX1day4. Highest 5 day precipitation amount RX5day5.Moderate wet days(days with RR > 75 th percentile of daily precipitation R75pamount)6. Precipitation fraction due to Moderate wet Days R75pTOT7. Very wet days (days with RR > 95 th percentile) R95p8. Precipitation fraction due to Very wet days R95pTOT9. Extremely wet days (days with RR > 99 th percentile) R99p10. Precipitation fraction due to extremely wet days R99pTOTTable -2Per cent of stations showing significant trendsR7.5cmR12.5cmRX1DAYIndex % No.of StationsHaving +ve trend 32 11 73 78 57 70 42 75 13 70-ve trend 5 2 26 22 22 22 6 21 3 28+ve Sig. trend 17 8 15 9 17 19 16 17 10 15-ve Sig. trend 2 1 1 3 5 3 1 1 3 1RX5DAYR75PR75PTOTR95PR95PTOTR99PR99PTOT15
Page 1 and 2: OCTOBER2006NCC3NCC RESEARCH REPORTT
Page 3 and 4: AbstractOne of the most significant
Page 5 and 6: et al. 2001; Kunkel 2003). Signific
Page 7 and 8: In section 2, details of data used
Page 9 and 10: 3. Results and DiscussionsWe have c
Page 11 and 12: Regional Average TrendsIn the time
Page 13 and 14: translate into a huge increase in s
Page 15: Houghton Jr, Ding Y, Griggs Dj, Nog
Page 19 and 20: Table - 4Rainfall Indices (1901-200
Page 21 and 22: abcd- Significant Positive Trends -
Page 23 and 24: ab- Significant Positive Trends - S
Page 25 and 26: Rainfall in mm200150100500Rainfall
Page 27: N C C RESEARCH REPORTS New statisti

Trends in Precipitation Extremes over India - (IMD), Pune

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