Weather n Climate | VOL. 9, ISSUE 55, July-August 2009 |

Rainfall Variability in India

Spatial Variability The chief features of spatial variability of annual rainfall are deduced by analysing expansion and contraction of moisture regions. The mean annual isohyets of 560 mm, 1040 mm, 1420 mm, 1630 mm and 2450 mm can be used to demarcate six Thornthwaite type climatic moisture regions – arid with 15.32 per cent, semiarid with 33.79 per cent, dry subhumid with 24.3 per cent, moist subhumid with 8.86 per cent, humid with 12.38 per cent and perhumid with 5.34...

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