The Science of Global Warming

摘要

Global warming is unequivocal,as is manifested in three internationally known global temperature records with the global average temperature rising at a rate of 0.70-0.75℃ per 100 years during 1910-2009 [Wen et al.,2011].In other words,the earth has warmed more than 0.8℃ since the Industrial Revolution.If it is true that 2℃ above pre-industrial level is a threshold of climate "safety",we will have to confront a serious situation where less than 1.2℃ warming is permissible in the future [Liu et al.,2011].According to climate system concept [Wang,2011],the global warming is not only reflected in global temperature change but also in changes of other climate system components,such as widespread melting of snow and ice,rising of global average sea level,and permafrost degradation [IPCC,2007].