Study On Regional Climate Response To Global Warming In The Arid Central-East Asia Over The Past 100 Years

Significant warming on a global basis for a century has drawn widespread attention of scientists. Studies show that mean temperatures over the globe and hemisphere exhibit marked rising trends in this period but they differ in trend development and numerical range on a regional basis. As a result, research into regional response becomes a heated issue in the on-going climate background. The arid central-east Asian (ACEA), or called midlatitude Asian inland arid band, serves as a transition between equatorial and extratropical latitudes, a region for interactions between westerly and monsoon climates. Because of its unique geography, the ACEA responds actively, and makes greater contribution, to global climate change. We now have to know what responses the study zone made to global warming for the past century, a study that would help understand the features and mechanisms of the ACEA climate change, thus providing reference for researchers dealing with climate responses. Based on CRU (Climate Research Unit) - offered gridded data of temperature and rainfall in 1901 - 2002 and temperature and rainfall observations from 135 stations over NW China during 1960-2005 furnished by CMA Meteorological Information Center, as well as datasets of other elements in 1901 - 2002 , this work is devoted to dominant mechanism for climate variation in the ACEA in this period and NW China as a highly dry area as its principal part in 1960-2005, with the sensitivity of regional and sub-regional temperature to global warming analyzed and besides, preliminary comparison is made between ACEA and other climate areas, leading to the following conclusions.1. During 1960-2005 a trend of consistent temperature rise is uncovered in NW China both from yearly and seasonal mean (except summer mean over south Shannxi), and annual temperature increase rate is 0.40℃/10a, with winter serving as the season experiencing greatest warming, arriving at as much as >06℃ per 10 years so that annual mean temperature depends on winter average. The last...