I analysed trend of the extreme rainfall using 0.25 deg High resolution Daily rainfall Data (HRDRD) of IMD of my study region for the period 1901-2013. The extreme rainfall Indices considered for annual are Total rainfall, Rx1-day, SDII, CWD, R100 or very heavy rainfall event (Rain events greater than 100mm), R65 0r heavy rainfall event (Rain events betwn 65-100mm), R2.5-65 or Moderate rainfall (rainfall events between 2.5-65 mm), R40 or Medium rainfall (Rainfall events between 40-65mm) and R20 or Low rainfall events (Rainfall events between 20-40mm). For seasonal analysis of Monsoon (JJAS), Pre-Monsoon (MAM) and Post Monsoon (ON) Indices considered are RRTOT (ratio of seasonal rainfall/Total rainfall), CWD, SDII, R2.5-65mm (Moderate rainfall).
I considered Precipitation concentration Analysis also Daily precipitation concentration, Monthly precipitation Concentration, Precipitation Concentration degree, Precipitation concentration period and Seasonality Index.
For these Indices I wish to relate the influence of Multivariate ENSO (Nino 1+2, Nino 3, Nino 4, Nino 3.4 and SOI).
My doubts are:
1) Is my hypothesis of findings are correct...?
2) Is it necessary to relate both the Annual and seasonal extreme rainfall indices above mentioned.
3) If it requires to find the relation between both annual and seasonal extremes rainfall indices how to consider the lead and lag time for Multivariate Indices. (Sir, Kindly more explanation for this point very specifically for Annual and Seasonal).
4) Sir, if any, important steps need to consider for my analysis. (Could you please refer me some Papers/Study material/Examples for better understand the analysis.)
Thank you
Regards
Vinay
Dibakar Pal Sir, Thank you for your Answer.
Sir, So many papers are ther to explain the Influence of ENSO. But am specifically concerned about Multivariate ENSO and Methodolgy to interpret the relationship. How to consider the lead-lag duration of ENSO and rainfall for Annual and seasonal.
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