NASA STUDY CONFIRMS GREENHOUSE EFFECT.
The Earth absorbs more solar energy than it emits, a calorie imbalance that confirms global warming as a result of an atmospheric greenhouse effect due to human pollution, according to a NASA (North American Space Agency) study published on April 28 in the United States. "This energy imbalance is the indicator that proves scientists' estimates regarding the impact of human activity on the environment are accurate", according to James Hansen, Director of Space Studies at NASA's Goddard Institute, the main source of the research published in Science Express, the online version of the American science review.
Using satellites linking up data from climate stations on buoys in the ocean and land-based facilities, as well as computer-generated oceanographic models, the team of researchers has calculated that the earth retains 0.85 watts of more energy per square metre than it gives off during the same period. Were it to persist, this accumulation of energy would lead to an increase in average temperatures worldwide of 0.6 degrees Celsius (one degree Fahrenheit) by the end of the century. Though this may seem modest, the additional quantity of heat caught around the globe will have a significant impact on the Earth's climate, according to the report. An increase of a watt per square metre over a period of ten thousand years would be enough to melt ice caps one kilometre thick, according to the American climate experts.
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|Date:||May 20, 2005|
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