%0 Journal Article
%T Simulation of astronomical solar radiation over Yellow River Basin based on DEM
%A QIU Xinfa
%A ZENG Yan
%A LIU Changming
%A WU Xianfeng
%A
%J 地理学报
%D 2004
%I
%X Based on the developed distributed model for calculating astronomical solar radiation (ASR), monthly ASR with a resolution of 1 km×1 km for the rugged terrains of Yellow River Basin was calculated, with DEM data as the general characterization of terrain. This model gives an all-sided consideration on factors that influence the ASR. Results suggest that (1) Annual ASR has a progressive decrease trend from south to north; (2) the magnitude order of seasonal ASR is: summer>spring>autumn>winter; (3) topographical factors have robust effect on the spatial distribution of ASR, particularly in winter when a lower sun elevation angle exists; (4) the ASR of slopes with a sunny exposure is generally 2 or 3 times that of slopes with a shading exposure and the extreme difference of ASR for different terrains is over 10 times in January; (5) the spatial differences of ASR are relatively small in summer when a higher sun elevation angle exists and the extreme difference of ASR for different terrains is only 16% in July; and (6) the sequence of topographical influence strength is: winter>autumn>spring>summer.
%K astronomical solar radiation (ASR)
%K rugged terrains
%K spatial distributions
%K digital elevation model (DEM)
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=4C9DF48581EA96F86254A71073BADC33&yid=D0E58B75BFD8E51C&vid=F3583C8E78166B9E&iid=CA4FD0336C81A37A&sid=E84BBBDDD74F497C&eid=CB423C9A71560A74&journal_id=0375-5444&journal_name=地理学报&referenced_num=0&reference_num=0