Local convergence zones or discontinuous lines in the Taklimakan Desert, Northwest China

作     者：Masatoshi YOSHINO Takashi ISHIYAMA Jun SUZUKI 

作者机构：Professor Emeritus University of Tsukuba Center for Environmental Remote SensingChiba University IDEA Consultants 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2010年第2卷第2期

页      面：77-86页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

主　　题：atmospheric circulation convergence zone discontinuous line satellite image Taklimakan Desert 

摘      要：In order to study convergence zones or discontinuous lines formed locally in the Taklimakan Desert,we analyzed available MODIS images onboad TERRA or AQUA satellite for ten cases:29 March 2002,14 April 2002;2 January 2003;21 April 2003;26 March 2004;28 April 2004;30 January 2005;25 June 2005;3 December 2005;and 26 July *** used weather maps published by the Japan Mete-orological Agency for the Asia and Pacific region at 500 hPa,700 hPa and 850 hPa,at 00Z and 12Z to analyze the meteorological conditions occurring in each *** estimated the positions of air streams,convergence zones or discontinuous lines between them,and thermal conditions on the maps and con-firmed the presence of cumulus and cumulonimbus clouds through satellite images in *** a review of previous studies,this paper introduced the results of the present *** warm areas in the Taklimakan Desert and on the Tibetan Plateau and local convergence zones or discontinuous lines in the Taklimakan Desert were discussed together with their diurnal changes,using composite maps of the ten *** the long axis of the desert the convergence zones or discontinuous lines normally extend 70-80 km in a west-east direction,but are suspected to exceed 100 km in extreme *** the other hand,the convergence zones or discontinuous lines extending in a north-south direction on the southern fringe of the desert have a length of 40-60 *** closed warm areas show clear diurnal changes,but they were not detected at the 500 hPa *** example of a clear convergence zone running in a north-south direction on 26 July 2006 was presented in detail with corresponding satellite images.