Precipitation in the Himalayas


Vol NO: VOL. 16, ISSUE 96,

"Extreme weather, such as heavy precipitation, extensive avalanches, cloud burst, flash floods and landslides, regularly happen in the western Himalayan region. These extreme events generally occur under the influence of mid-latitude westerly systems during the winter months and due to monsoonal systems in summer. The western Himalayan region climate is influenced by the southwest monsoon from June to September and by westerly systems from November to March. Several scientists have studied the precipitation pattern and trends in this region so far. The variability in discharge data of four rivers in the north-western Himalayas, namely Beas, Chenab, Ravi and Satluj (Bhutiyani et al., 2008) and the variation in precipitation over the northwest Himalayas using monthly precipitation data from Shimla, Srinagar and Leh have been studied by a group of scientists (Bhutiyani et al.,2010). There was no discernible change observed in winter precipitation but a significant decreasing trend was evident in monsoon precipitation during the period under study. The rainfall variability over Uttarakhand using 80 years’ data is also studied (Basistha et al., 2009). The variations in seasonal and annual rainfall as well as rainy days over Kashmir valley have also been stud

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    Naresh Kumar, B P Yadav and Sanjay Bist

    The western Himalayan region experienced an increasing trend of one-day heaviest precipitation, during both winter and monsoon through 1978 to 2007. While one day heaviest precipitation is on the rise in high-altitude stations during winter, the same is observed in low altitude stations during the monsoon.

    Authors are scientists, India Meteorological Department, Lodi Road, New Delhi,

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