ANTHONY MCMICHAEL heads the International Centre for Epidemiology and Population Health at the Australian National University, and is a member of the Intergovernmental Panel on Climate Change. He talks to VIBHA VARSHNEY and MARIO D'SOUZA about the health risks from global environmental changes

What are the impacts of climate change on disease outbreaks?

High in the Himalayas, above this peaceful valley where farmers till a patchwork of emerald-green fields, an icy lake fed by melting glaciers waits to become a "tsunami from the sky.' The lake is swollen dangerously past normal levels, thanks to the global warming that is causing the glaciers to retreat at record speed. But no one knows when the tipping point will come and the lake can take no more, bursting its banks and sending torrents of water crashing into the valley below.

While making policies and designing disaster recovery programmes, the different gender roles and responsibilities that are socially attributed to men and women should be taken into account. The programmes should focus specifically on the women's component in the general scheme or women-specific schemes. The gender perspective should be incorporated into disaster budgeting in such a way that the vulnerable are catered to according to their specific needs.

Bio-fuels were a

The aim of this study was to find out the impact of climate change, if any, on the phenophases of 11 multipurpose tree species, growing as block plantation at one site, during eight years (1999

Decline in national wheat productivity, and stagnation of yield in the national Advanced Varietal Trials in the past decade are partly attributed to high temperature stress during the period of grain-filling. In view of the predicted global warming, terminal heat stress is likely to increase.

The sea-ice cover in the polar regions is one of the most expansive and seasonal geophysical parameters on the earth's surface. The presence or absence of sea-ice affects the atmosphere and the ocean, and therefore the climate in many ways. In this study we have used the Multi-frequency Scanning Microwave Radiometer (MSMR) brightness temperature data over the Antarctic/Southern Ocean region to calculate the weekly sea-ice extents, during the melting phase from August 1999 to March 2000 to quantitatively estimate the melting rates of sea-ice on a hemispheric scale.

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 in policy planning and observation system design. We report here a highresolution (10 km) analysis of heavy rainfall episodes (defined as 24-h rainfall exceeding 250 mm) over the Indian region.

The Arctic and northern subpolar regions are critical for climate change. Ice-albedo feedback amplifies warming the Arctic, and fluctuations of regional fresh water inflow into the Arctic Ocean modulate the deep ocean circulation and thus exert a strong global influence.

The Arctic and northern subpolar regions are critical for climate change. Ice-albedo feedback amplifies warming in the Arctic, and fluctuations of regional fresh water inflow to the Arctic Ocean modulate the deep ocean circulation and thus exert a strong global influence. By comparing observations to simulations from 22 coupled climate models, the researchers find influence from anthropogenic greenhouse gases and sulfate aerosols in the space-time pattern of precipitation change over high latitude land areas during the second half of the 20th century.

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