Concurrent association between 700-mb 5.day mean contour patterns and 5-day rainfall anomaly over India during July
Utilising pentad charts for July for the years 1957-1966, broadscale features of 5-day mean contour patterns associated with widespread abnormal and subnormal rainfall over five large areas, viz., northeast, northwest, central, western and southern India have been examined. The association between monsoon trough axis location and rainfall anomaly over these large areas has been brought out, Association between monsoon trough axis location and rainfall has also been investigated for all the sub-divisions of India. The study reveals that for most of the sub-divisions of India the concurrent association between location of monsoon trough axis and occurrence of non-subnormal and non-abnormal rain is high, In conjunction with forecast 5-day mean 700-mb contour chart, these relationships could be used to forecast non-subnormal and non-abnormal rainfall over most sub-divisions of India.
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