Global land-surface air temperature change based on the new CMA GLSAT data set

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 236-238
• 页数: 3页
• 语种: 中文

摘要

The China Meteorological Administration (CMA) has recently developed a new global monthly homogenized land-surface air temperature data set.Based on this data set,we reanalyzed the change in global annual mean land-surface air temperature (LSAT) during three time periods (1901-2014,1979-2014 and 1998-2014).The results show that the linear trends of global annual mean LSAT were 0.104 ℃/decade,0.247 ℃/decade and 0.098 ℃/ decade for the three periods,respectively.The trends were statistically significant except for the period 1998-2014,the period that is also known as the "warming hiatus".Our analysis generally confirms the spatial differences of global land warming over the two longer periods (since 1901 and 1979),as reported in previous lntergovernmental Panel on Climate Change (IPCC) assessment reports,but shows that the recent "warming hiatus" period was characterized by a slower warming or even a cooling trend in the low to mid-latitude zones of the two hemispheres.