Response of the East Asian climate system to water and heat changes of global frozen soil using NCAR CAM model  

作　　者：XIN YuFei WU BingYi BIAN LinGen LIU Ge ZHANG Lin LI Ren 

机构地区：[1]Chinese Academy of Meteorological Sciences,Beijing 100081,China [2]Nanjing University of Information Science and Technology,Nanjing 210044,China [3]Cold and Arid Regions Environmental and Engineering Research Institute,Lanzhou 730000,China

出　　处：《Chinese Science Bulletin》2012年第34期4462-4471,共10页

基　　金：supported by the National Basic Research Program of China (2007CB411505);the Youth Foundation of NSFC (40905048);the Basic Scientific Special Project "Climate system model" of Chinese Academy of Meteorological Science (2008Z001 and 2010Z003)

摘　　要：在陆地空气热和水保存的条件下面，一套敏感数字实验被设置调查东方亚洲气候系统的反应到全球冻结的土壤变化。这被介绍 supercooled 土壤水过程进社区陆地模型(CLM3.0 ) 做，它被联合了到大气的研究社区空气模型(CAM3.1 ) 的国家中心。结果显示出那：(1 ) 在在 CLM3.0 的土壤冰和土壤水之间的比率被 supercooled 土壤水过程清楚地改变。地面表面温度和土壤温度也被影响。(2 ) 欧亚(包括的东方亚洲人) 气候系统在冻结的土壤区域对热和水的变化敏感。在 1 月，阿留申群岛之土人低海水平压力发行量被加强，在 500 hPa 高堵住的乌拉尔变弱，并且东方亚洲马槽变弱。在 7 月，在阿留申群岛之土人岛区域上的海水平压力显著地被减少；在东方亚洲海洋上有在东方亚洲大陆，和积极异例上的 500 hPa geopotential 高度的否定异例。(3 ) 在 1 月，在东亚上的 850 hPa 风地的南方的部件增加，显示削弱的冬季季风。在 7 月，当在海洋上有逆旋风的异例时，气旋的异例出现在东方亚洲大陆上，加强的东方海岸夏天季风反射。(4 ) 在东亚的夏天降雨显著地变化了，包括南部的 Qinghai 西藏高原，中央长江盆，和东北中国上的实质的降水增加。夏天降雨显著地在华南和海南岛减少了，但是稍微减少了在中央并且北方中国。进一步的分析沿着 30 显示出可观的上面的空气运动吗？？Under the condition of land-atmosphere heat and water conservation, a set of sensitive numerical experiments are set up to inves- tigate the response of the East Asian climate system to global frozen soil change. This is done by introducing the supercooled soil water process into the Community Land Model （CLM3.0）, which has been coupled to the National Center of Atmospheric Re- search Community Atmosphere Model （CAM3.1）. Results show that： （1） The ratio between soil ice and soil water in CLM3.0 is clearly changed by the supercooled soil water process. Ground surface temperature and soil temperature are also affected. （2） The Eurasian （including East Asian） climate system is sensitive to changes of heat and water in frozen soil regions. In January, the Aleutian low sea level pressure circulation is strengthened, Ural blocking high at 500 hPa weakened, and East Asian trough weakened. In July, sea level pressure over the Aleutian Islands region is significantly reduced; there are negative anomalies of 500 hPa geopotential height over the East Asian mainland, and positive anomalies over the East Asian ocean. （3） In January, the southerly component of the 850 hPa wind field over East Asia increases, indicating a weakened winter monsoon. In July, cyclonic anomalies appear on the East Asian mainland while there are anticyclonic anomalies over the ocean, reflective of a strengthened east coast summer monsoon. （4） Summer rainfall in East Asia changed significantly, including substantial precipitation increase on the southern Qinghai-Tibet Plateau, central Yangtze River Basin, and northeast China. Summer rainfall significantly decreased in south China and Hainan Island, but slightly decreased in central and north China. Further analysis showed considerable upper air motion along -30°N latitude, with substantial descent of air at its north and south sides. Warm and humid air from the North- east Pacific converged with cold air from northern land areas, representing the main cause of the precip

关 键 词：土壤水分 东亚大槽 热量变化 气候系统 冻土变化 CAM模型 NCAR 海平面气压 

分 类 号：P642.14[天文地球—工程地质学]