Based on the grid data set of temperature and precipitation of China (0.5°×0.5°) and the output of coordinated regional downscaling experiment (CORDEX) East Asia, including the climate prediction based on RCP4.5 and RCP 8.5, the authors simulate and analyze vulnerability in Chinese northern farming-pastoral region from 1980 to 2100 with temperature, precipitation and maximum near-surface wind speed. The results show that the ecologically vulnerability in Chinese northern farming-pastoral region increases during 2006-2100, especially after 2050, the increase speed rises rapidly. By the end of 21st century, almost all the Chinese northern farming-pastoral region shows at least obvious vulnerability. Said on the space, the vulnerability is severe from Zhongwei to north of Hohhot, however, it’s better in north Great Khingan.

The concentration monitoring of the Embassy of the United States in China since 2009, the aerosol optical depth of MODIS and the planetary boundary layer data of NCEP were used to analyze the meteorological conditions in the planetary boundary layer of Beijing in recent years. The results show that from 2009 to the summer of 2011 and the summer and winter of 2012, the pollution status of Beijing is serious. In 2013 and 2014, pollution is slightly better. The north wind is benefit to the diffusion of pollutants, and the greater the north wind, the better the diffusion effect. The south wind is benefit to the accumulation of pollutants, and the greater the south wind, the better the accumulation effect. Higher planetary boundary layer results in better diffusion. Greater humidity results in more accumulation. Precipitation has obvious effect on the diffusion of pollutant. Since twenty-first century, these meteorological conditions of Beijing have no obvious interannual variation except the planetary boundary layer height, which is obviously reduced from 2500 m to 1500 m.