Soot absorbs 80 per cent of the solar radiation it receives; directly warms the atmosphere
SHORT LIFE: While CO2 stays in the atmosphere for centuries, soot stays aloft only for days to weeks; ozone persists for just weeks to months. - PHOTO: AFP
In arid environments such as deserts, nitrogen is often themost limiting nutrient for biological activity. The majorityof the ecosystem nitrogen flux is typically thought to be drivenby production and loss of reactive nitrogen species by microorganismsin the soil.
Planned adaptation to climate change requires information about what is happening and why. While a long-term trend is for global warming, short-term periods of cooling can occur and have physical causes associated with natural variability. However, such natural variability means that energy is rearranged or changed within the climate system, and should be traceable.
Helsinki: A Finnish company has signed a $1.4-million deal with the Indian Meteorological Department (IMD) to provide 60 hi-tech automatic weather stations (AWS) and equipment to predict weather accurately during the 2010 Commonwealth Games in Delhi.
GLOBAL warming will mean that more people die from the heat. There will be a rise in sea levels, more malaria, starvation, and poverty. Concern has been great, but humanity has done very little that will actually prevent these outcomes. Carbon emissions have kept increasing, despite repeated promises of cuts.
Washington, June 28: The Sun, a star at the centre of the solar system, is known to provide ideal conditions for life to thrive on earth. But, astronomers have claimed that it also leaves the planet wide open to harmful cosmic rays.
