%0 Journal Article
%T Effects of artificial oases on climate change trend<br>人工绿洲对夏季气候变化趋势的影响
%A YANG Qing
%A <br>杨青
%J 生态学报
%D 2004
%I 
%X In earlier investigations, the effects of artificial oases on climate environment were studied by analyzing the weather element differences and energy exchange mechanism between oases and deserts areas based on comparing short term (days or months) in-situ data which were collected from very few observation stations. In this paper, a background climatic series was established by selecting weather stations which are located in remote areas where (there are not so many human activities). On the other hand, we choose weather stations located on oases and built oases climatic series. The climate change ratio differences between oases and deserts in recent 50 years are explored through analyzing 9 climatic factors (air temperature, precipitation, vapor pressure, evaporation and wind speed and so on). The results show that there are distinct climatic environmental effects caused by oasis developments on local climate change. Specifically, the warm trend in oases is lower than the background change trend in summer. There were slight cool trends in some oasis sites, such as the Turpan-Shanshan-Toksun Basin and the Yarkant River watershed. Oases played an obvious restraining role in the trend of increasing maximum temperature. For example, the maximum temperatures decreases in Yarkant River watershed and the middle reaches of Tarim River. Another result is that oases strengthened slightly the increasing trends of minimum temperature. There were decreasing trends of diurnal-nocturnal temperature difference due to oasis effects. In summer, another oasis effect is that potential evaporation decreases, air vapor pressure increases then leading to more precipitation. The most significant oasis effect is the decrease of both average wind speed and the number of gale days.
%K oasis effect
%K climate change<br>绿洲效应
%K 气候变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=EB1677D16AEB0EF1&yid=D0E58B75BFD8E51C&vid=B91E8C6D6FE990DB&iid=59906B3B2830C2C5&sid=4632F66201B6AB53&eid=3C2B0085DDCE7118&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=39