In the backdrop of a changing climate, this report investigate whether the Indian summer monsoon is changing either in terms of duration or spatial coverage. Such an analysis specifically for the continental Indian region has both conceptual and societal implications, and has been lacking.

Climate models and satellite observations both indicate that the total amount of water in the atmosphere will increase at a rate of 7% per kelvin of surface warming. However, the climate models predict that global precipitation will increase at a much slower rate of 1 to 3% per kelvin. A recent analysis of satellite observations does not support this prediction of a muted response of precipitation to global warming. Rather, the observations suggest that precipitation and total atmospheric water have increased at about the same rate over the past two decades.

an archaic weather prediction model, giving out one national forecast for the country's six climatic zones, is fast losing its utility in the face of far more accurate models used by global

The World Health Organization (WHO) has calculated that by 2020 human-triggered climate change could kill 300,000 people worldwide every year.

The concept of an interannually varying Indian summer monsoon season is introduced here, considering that the duration of the primary driving of the Indian monsoon - the large-scale meridional gradient of the deep tropospheric heat source - may vary from one year to another. Onset (withdrawal) is defined as the day when the tropospheric heat source shifts from south to north (north to south).

a group of Asian scientists has framed a new plan to set up a comprehensive system to approach the study of changing monsoon patterns in Asia. A piecemeal approach towards the subject so far has led


Extreme rainfall events today pose a serious threat to many populated and urbanized areas worldwide; an accurate estimate of frequency and distribution of these events can significantly aid policy planning and observation system design. We report here a first-ever high-resolution (10 KM) analysis of heavy rainfall episodes (defined as 24-hour rainfall exceeding 250 mm) over the Indian region.

Some teleconnections studies between the monsoon rainfall over four meteorological subdivisions namely, plains of west U.P., East U.P., Bihar Plains and Gangetic West Bengal, thus constituting an area of U.P., adjoining Bihar and West Bengal and different thickness anomaly and geopotential heights over several levels in the troposphere over India have been carried out to find some useful predictive parameters for the long range prediction of monsoon rainfall.

on february 2, the Intergovernmental Panel on Climate Change (ipcc) released its much awaited Fourth Assessment Report. With an unprecedented confidence of 90 per cent, it asserted that climate