【摘要】 为了用中尺度模式研究干旱地区非均匀下垫面与大气的相互作用及其对边界层气候的影响,本文对Nickerson等提出的β-中尺度模式进行了某些修改。在此基础上我们着重对模式进行了敏感性试验,结果表明:模式对植被覆盖度和背景风速十分敏感。其次我们用此模式研究了我国北方(40°N,100°E)夏季非均匀下垫面对边界层气候的影响。更多还原

【Abstract】 In order to investigate the interaction between the dry land inhomogeneous underlying surface (IUS) and the atmosphere, with the resulting influence on the boundary layer climate (BLC), the β-mesoscale model proposed by Nickerson et al. (1986) is used with some modifications done for our study. The revised model is subjected to the sensitivity experiment, and results show that it is highly sensitive to changes in the vegetative cover and background windspeed. Then the model is employed to explore the BLC’s effects of the summer IUS located in a dry-land region of North China (around 40° N, 100° E).更多还原