%0 Journal Article
%T Energy Balance of Land Surface Process in the Arid and Semi-Arid Regions of China and Its Relation to the Regional Atmospheric Circulation in Summer<br>夏季我国干旱、半干旱区陆面过程能量平衡及其局地大气环流
%A Bueh Cholaw
%A Ji Liren
%A Cui Maochang
%A <br>布和朝鲁
%A 纪立人
%A 崔茂常
%J 气候与环境研究
%D 2002
%I 
%X The surface sensible heat flux of the arid and semi-arid regions of China is the strongest in Eurasian continent. The corresponding surface latent heat flux in this area, however, is very weak. In this area, the short wave radiation accepted by the surface is mainly released by sensible heat flux and long wave radiation. The annual precipitation here very deficient, thus its interannual variability is con- siderably weak. consequently, the surface energy fluxes show much weak interannual variability. But the interdecadal variability of the surface sensible heat flux in this area is significant compared to the corresponding interannual variability. In the arid and semi-arid regions of China, the thermal process of the atmospheric circulation is closely related to its land surface process. The troposphere radiative cooling is strong and up to -3 K d-1, whereas the large-scale condensation heating, deep and shallow convection heating is negligibly weak. As a consequence, the radiative cooling above 600 hPa layer is balanced by the adiabatic warming of descending motion. Below 600 hPa layer, quite differently, the vertical diffusion heating caused by surface sensible heat flux prevails and reaches about 8 K d-1. It bal- ances not only the radiative cooling but also the adiabatic cooling accompanying an upward rising mo- tions. In other words, the land surface process in the arid and semi-arid region of China is responsible for the vertical structure of its regional atmospheric motion, i. e., the upper layer descending and lower layer rising motion. The interdecadal variability of surface energy balance and its related regional at- mospheric circulation results from that of the global climate system.
%K land surface process
%K energy balance
%K interdecadal variability
%K atmospheric circulation<br>陆面过程
%K 能量平衡
%K 年代际变率
%K 大气环流
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=484C10BAB5333C14751916EACFF8295F&aid=0F038A81F26853AE&yid=C3ACC247184A22C1&vid=DF92D298D3FF1E6E&iid=CA4FD0336C81A37A&sid=1D0FA33DA02ABACD&eid=B9704B40A4225A24&journal_id=1006-9585&journal_name=气候与环境研究&referenced_num=20&reference_num=7