Ina study by Professor James Hansen of Columbia University and 16 other climate scientists said a sea level rise of three metres could be a reality by the end of the century. The Northern Hemisphere not only has much more land, but the arrangement of land masses around the Arctic Ocean has resulted in the maximum surface area flipping from reflective snow and ice cover to ocean and land surfaces that absorb more sunlight and thus more heat.
Land ice has declined at the poles by gigatons a year since Each pathway shows how various measures e. Therefore, a key approach is to use physically or statistically based computer modelling of the climate system to determine unique fingerprints for all potential causes. Gases in the atmosphere trap this heat, preventing it from escaping into the void of space good news for life on the planet.
Greenhouse gases Since the beginning of the industrial revolution, humans have been rapidly changing the balance of gases in the atmosphere.
Benefits were projected to be outweighed by negative health effects of rising temperatures, especially in developing countries. The pace of change has been an additional 0. Changes in climate may be due to natural causes, e. Tropical cyclones At the global scale, the frequency of tropical cyclones will probably decrease or be unchanged.
Our clean energy economy is growing too, despite federal efforts to derail it. One piece of their evidence is that in summerduring Europe's big heat wave, there were 70, recorded deaths related to the heat. In fact, according to the EPA, humans are responsible for more than 60 percent of methane emissions.