1. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Objectives Analysis of spatio-temporal variability of precipitation over major river basins of India Analysis of spatio-temporal variability of precipitation over major river basins of India Study of past changes in water availability and their sensitivity to climate variability and land-use/land- cover changes Study of past changes in water availability and their sensitivity to climate variability and land-use/land- cover changes Evaluation of regional climate model simulations of precipitation Evaluation of regional climate model simulations of precipitation Study of past changes in water quality Study of past changes in water quality Development of future scenarios for water availability and quality under different climate change scenarios Development of future scenarios for water availability and quality under different climate change scenarios

2. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Indian Institute of Tropical Meteorology, Pune (An Autonomous Institute under Dept. of Science & Technology, Govt. of India) Established 1962 Established 1962 Initially part of IMD Initially part of IMD Autonomous in 1971 Autonomous in 1971 100 Scientists 100 Scientists Focus on Monsoon Research Focus on Monsoon Research Climate Diagnostics and Modelling Climate Diagnostics and Modelling

3. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Research Tasks Identification of target river basins Identification of target river basins Baseline precipitation analysis: Precipitation climatology of major river basins; Spatio-temporal variability of precipitation Baseline precipitation analysis: Precipitation climatology of major river basins; Spatio-temporal variability of precipitation Evaluation of HadRM2 simulations of monthly/daily precipitation over major river basins Evaluation of HadRM2 simulations of monthly/daily precipitation over major river basins Case studies of past changes in water availability and quality in relation to climate and land-use/land-cover changes Case studies of past changes in water availability and quality in relation to climate and land-use/land-cover changes Hydrometeorological analysis of HadRM2 simulations for major river basins Hydrometeorological analysis of HadRM2 simulations for major river basins Water availability scenarios for major river basins including the scenarios for the impacts of land use and cover Water availability scenarios for major river basins including the scenarios for the impacts of land use and cover Identification of critical areas and frequency/impacts of extreme events Identification of critical areas and frequency/impacts of extreme events

4. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Mean Rainfall Patterns Data Source: CMAP (1979-2000) Summer Monsoon (mm/season) Annual (mm/year)

5. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Indian Summer Monsoon Contribution to Annual Rainfall and its Variability Data Source : CMAP (1979-2000) Monsoon/Annual (%) Coefficient of Variation (%)

6. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 The Stability of the Indian Summer Monsoon

7. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Temporal scales of monsoon variability Global climate excursions; Ice ages; Warm epochs; Sun-earth geometry Monsoon circulation variations; Deep ocean involvement; Greenhouse gases increase; Human activities; Biospheric changes; Volcanic dust Atmospheric interactions; El Niño/ Southern Oscillation; Top layers of tropical oceans; Snow cover; Land surface characteristics Atmospheric variability; tropical- midlatitude interactions; Soil moisture; Sea surface temperatures Changes in the areal extents of monsoons Changes in the frequency of droughts and floods Droughts and floods Onset/withdrawal; Active and break- monsoon phases; 30-50 day oscillations; severe rainstorms Millennia & longer Decadal/CenturyInterannualIntraseasonalFactors Features

8. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Rainfall Data Homogeneous monthly rainfall data set for 306 stations (1871-2001) Homogeneous monthly rainfall data set for 306 stations (1871-2001) Daily rainfall data at 500-1000 raingauge stations during 1901-90 (variable network) Daily rainfall data at 500-1000 raingauge stations during 1901-90 (variable network)

9. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Change in Raingauge Network Density (1871-1992)

10. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Raingauge Network for Daily Rainfall Data

11. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Major River Basins of India

12. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Identification of Target River Basins 66 notable river basins 66 notable river basins 3 large river basins identified : Ganga, Godavari and Krishna 3 large river basins identified : Ganga, Godavari and Krishna Summer monsoon main source of water for all the three basins Summer monsoon main source of water for all the three basins

13. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 All-India Mean Monthly Rainfall

14. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 All-India Seasonal Rainfall

15. Indo-UK Programme on Climate Change Impacts in India : Delhi Workshop, Sep. 5-6, 2002 Annual Cycles of Rainfall in Major River Basins of India Ganga Godavari Krishna