tailieunhanh - development and climate change

Tham khảo sách 'development and climate change', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Headed toward the danger zone Human activity B warming th plan . For the past miRennium the Earth s average temperature varied within a range of less C shown In greenX however man made greenhouse gas omissions have resulted n a dramatic Increase n the planet s temperature over the past century shown in yehow . The projected future increase over the next 100 years shown in red due to growing emissions could possibly warm the plane by 5 c rehtrve to the preindustrldl period. Such warming has never been experienced by mankind and the resulting physical Impacts would severely limit develop ment Only through Immediate and ambitious actions to curb greenhouse gas emissions may dangerous warming be avoided. The evolution of the planet s temperature for the past 1 000 years Is based on a range of proxy estimates such as tree nng analysis or ice core samphng that define he envelope of long-term temperature variation. With modern weather observations starting in the nineteenth century global temperature could be estimated more precisely thermometer data for the past 150 years or sodocu ment d global temperature increase of nearly rc since the preindustrlal period. Global climate models that estimate the effect of deferent future em rssionvco narioson Earth s cbmate predxt d range of possible global temperatures for this century. These estimates show that even the most aggressive mitigation efforts may lead to warming of ÌX or more a level already cons dered dangerous and most models project that less mitigation would lead to warming of 3 C or even up to 5 c and beyond though With less certainty around these higher amounts of warming The three globes on the cover are com posites of data collected by sateKtes during the summer months of 1998 through 2007. Th colors of th ocean represent chlorophyll concentration which Is a measure of the global distribution of oceanic piant life phytoplankton . Deep blue colors are areas of low chlorophyll concentration while green .

• Cơ khí - Chế tạo máy
• The subject of rock mechanics
• Content of this book
• Geological setting
• Natural rock environments
• Stress as a point property