IPCC第二十六次全会在泰国召开

政府间气候变化专门委员会（IPCC）第三工作组第九次全会暨IPCC第二十六次全会于2007年4月30日至5月4日在泰国曼谷召开。此次会议的主要议题是审议并批准IPCC第三工作组第四次评估报告决策者摘要,以及原则通过IPCC第三工作组第四次评估报告主报告。     

Simulation of seasonal circulations and thermohaline variabilities in the Gulf of Thailand

Based on the Princeton Ocean Model （POM）, the seasonal thermohaline feature and the ocean circulation in the Gulf of Thailand （GOT）, situated between 6°N to 14°N latitude and 99°E to 105°E longitude, were studied numerically with 37 × 97 orthogonal curvilinear grid and 10 vertical sigma levels conforming to a realistic bottom topography. A spin-up phase of the first model run was executed using wind stress calculated from climatological monthly mean wind, restoring-type surface heat and salt, and climatological monthly mean fresh water flux data. In this paper, the temperature and salinity fields taken from Levitus94 data sets and the calculated temperature and salinity from the model run for 12-month mean and for each season are presented where the winter, summer, rainy, and end of the rainy seasons of Thailand are represented by the months January, April, July, and October, respectively. The simulated circulations are also described. The results show that the temperature in the GoT is warmer than the temperature of the other parts connected to the South China Sea （SCS）. At any depth of inflow from SCS into the GoT, the salinity is high, but in the outflow from the GoT at the surface, the salinity is low. The strong circulations are clockwise during summer and the rainy seasons of Thailand, which are the East Asian monsoon periods, northeasterly and southwesterly during summer. They occur near Pattani and Narathiwat provinces during summer and in the central GoT during the rainy seasons. Sensitivity experiments were designed to investigate the effects of wind forcing and open boundary conditions. Wind forcing is shown to be the important factor for generating the circulation in the GoT. The lateral velocity at the open boundaries is of considerable importance to current circulation for the rainy and end of the rainy seasons, with insignificant effect for the winter and summer seasons of Thailand.     

用卫星推测气溶胶对泰国对流云微结构的影响

本文运用由太空遥感推测云微结构和降水形成过程的新方法,来证实气溶胶对泰国对流云的影响。推测出季风前的云中有一个深厚的云滴扩散增长带,几乎不存在并合和冰化作用带,原因是对高浓度气溶胶的涉取,特别是来自生物体燃烧的云凝结核（CCN）所致。在西南季风期间,由于大气较洁净,云具有较宽的滴谱,云滴扩散增长带较浅薄,云滴并合增长带深厚,有较高温度（例如>－10℃）下的早期冰化作用特征。然而即使在季风期间,云自西向东跨越泰国时变得更具大陆性,这是由于气团移入内陆时,对气溶胶的逐渐涉取所致。本文讨论了这些发现对泰国…