S. Senthilnathan’s scientific contributions

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Figure 2: Selection of boxes to compare the uncertainties from different global climate model.  
Figure 2 shows boxes selected at the lateral boundaries (Box 1 and Box 2) and we compare only the moisture field here. Over the other boxes, one over the Arabian Sea (Box 3) and another over Bay of Bengal (Box 4), low-level wind and moisture fields are compared that are deemed to influence rainfall during southwest monsoon (Box 3) and northeast monsoon (Box 4) seasons, respectively.
Figure 3(b) shows the annual cycle in precipitable water over Box 2. Here, the GFDL output has a good agreement with ERAinterim as compared to their relationship in Box 1. But, CCSM4 is stronger than both GFDL and ERA-interim. The moisture transport from this region (Box 2) appears important for northeast monsoon (Fig. 1a). For regional downscaling, one inference from Figs. 3a-b is that both the southwest and northeast monsoons may be stronger when forced by CCSM4 output.  
Figure 3: Temporal evolution of daily climatology of vertically integrated specific humidity averaged over Box 1 (a) [Lon=115 to 124 and Lat=10 to 35] and Box 2 (b) [Lon=60 to 100 and Lat=-24 to -15].  
Figure 4: (a) Temporal evolution of total winds climatology and (b) moisture field for south west monsoon season over the Arabian Sea [Box 3: Lon=60 to 73 and Lat=5 to 17]  

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Sustaining rice production in a changing climate
  • Technical Report
  • Full-text available

January 2011

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S. Senthilnathan

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