Century Of Human Impact On Global Surface Temperature
Posted by DA Morgan on Jan 23, 2002 at 14:46
win07.drizzle.com (216.162.193.166)Human activity has affected Earth's surface temperature during the last 130 years, according to a study published this month by the Journal of Geophysical Research. Dr. Robert K. Kaufmann of Boston University's Center for Energy and Environmental Studies and Dr. David I. Stern of the Australian National University's Centre for Resource and Environmental Study analyzed historical data for greenhouse gas concentrations, human sulfur emissions, and variations in solar activity between 1865 and 1990. The greenhouse gases studied included carbon dioxide, methane, nitrous oxide, and chloroflurocarbons 11 and 12.
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