Tropical Energy and Water Cycles

GAME-T的目标是对东南亚目标地区的水汽通量、降水、蒸散、辐射通量及其季节、季节内和年际变化进行定量监测。特别是研究了稻田、草地、森林等几种典型土地覆被类型地表水、能通量的差异，更好地理解这些水、能循环在亚洲季风气候系统中的作用，提高季节水文气象预报的精度，也是GAME-T研究的重要课题。为了实现这些目标，已规划和实施了各种实地观察和数据收集工作。1998年为GAME-T的加强观测期，进行了有组织的野外观测和资料收集，GAME-T的研究内容可分为5个亚组：1）陆面通量观测; 关于我们 2）利用雷达和数值模拟研究降水的日循环; 3）利用雷达探测和分析研究GAME-T中的气候; 4）GAME-T水文气象数据库（GAIN-T）; 5）水文模拟、区域大气模拟及其耦合。GAME-T成员的陆面通量观测主要在季风森林（Kog-Ma）、稻田（素可泰）和灌木林与草地（位于Tak的EGAT站点）三个点进行，部分自1996年以来，主要自1998年以来。它们也被纳入GAME-AAN观测网络。这些活动的目的是为建立和改进一维陆面模式提供基础数据，以估计东南亚典型陆面的能量和水通量。作为“陆面模拟”，采用Sellers等人（1996）的简单生物圈模式2（SiB 2）模拟稻田水和能量循环。成功地完成了“山区降水观测”和“利用雷达和数值模拟研究降水日循环”两个项目。已建成的“GAME-T水文气象数据库：GAIN-T”已成为该地区水文气象研究的最基本资料来源。“模型”有助于成功研究森林砍伐对印度支那的影响和该地区的水资源评估。少

The objective of GAME-T is quantitative monitoring of vapor flux, precipitation, evapotranspiration, radiative flux and their seasonal, intra-seasonal and interannual variation at the target area of Southeast Asia. In paticular, difference of water and energy fluxes at land surface among several representative land cover types, such as paddy field, grassland, forest and so on, has been focused on. The better understanding of the role of such water and energy cycles in the Asian Monsoon climate system and improving the accuracy of seasonal hydrometeorological prediction are vital issues of the research in GAME-T, as well. In order to accomplish these objectives, various field observations and data collections have been planned and implemented. The year of 1998 was set to be the Intensive Observation Period (IOP) of GAME and organized field observations and data collections were carried out.The research components of GAME-T can be divided into 5 sub-groups : 1) Land surface flux observat … More ion and modeling, 2) Investigation of diumal cycle of precipitation using radar and numerical modeling 3) Rawinsonde observation and analysis, and the description of climate in GAME-T 4) Hydrometeorological database for GAME-T (GAIN-T) 5) Hydrological modeling, regional atmospheric modeling and their coupling.As land surface flux observation and modeling", the land surface flux observations by GAME-T members have been conducted mainly at three points of monsoon forest (Kog-Ma), paddy field (Sukhothai) and shrubbery forest with grassland (EGAT site in Tak) partly since 1996 and mainly since 1998. They are also included in the GAME-AAN observation network. These activities aim to offer basic datasets for the construction and the improvement of one-dimensional land surface model to estimate energy and water flux from typical land surfaces of Southeast Asia. As "land surface modeling", the simple biosphere model 2 (SiB2) by Sellers et al. (1996) was adopted for the simulation of water and energy cycles at paddy field. "Rainfall observation in a mountainous area" and "Investigation of diumal cycle of precipitation using radar and numerical modeling "were carried out successfully. The constructed "Hydrometeorological database for GAME-T : GAIN-T" has become the most fundamental sources for hydrometeorological researches for this region. "Modeling" contributes to the successful research on deforestation impact over Indochina and the water resources assessment of the region. Less