Says this could cause sea levels to rise by up to a metre. The 1980s turn out to be the warmest decade, with seven of the eight warmest years up to 1990. Meeting of climate scientists in Toronto subsequently calls for 20 per cent cuts in global CO2 emissions by year 2005. Warns that only strong measures to halt rising greenhouse gas emissions will prevent serious global warming. Provides scientific clout for UN negotiations for a climate convention.
Average temperatures drop for two years before rising again.
In March, first full meeting of convention signatories in Berlin, agrees Berlin Mandate. Global Warming Accelerating, U.S. Study Finds. Until now researchers have depended on ground-based measurements and theoretical models to gauge the change in greenhouse gases, believed by scientists to be the cause of global warming and major climate disruption. New sets of data taken 27 years apart from two satellites orbiting the Earth have now provided the first observational evidence from space of a rise in greenhouse gases. By comparing the two sets of data, Brindley and her colleagues have shown a change in greenhouse gas emissions from Earth over 27 years which is consistent with ground-based measurements.