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Tropical Energy and Water Cycles

热带能源和水循环

基本信息

批准号：
11201202
负责人：
MUSIAKE Katumi
金额：
$ 42.56万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

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

GAME-T的目标是定量监测东南亚目标区域的水汽通量、降水、蒸散发、辐射通量及其季节、季节内和年际变化。重点研究了水田、草地、森林等几种具有代表性的土地覆盖类型间地表水能通量的差异。更好地理解这种水能量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准确性也是GAME-T研究的重要问题。为了实现这些目标，已经计划和执行了各种实地观察和数据收集。1998年被定为GAME的集中观察期，进行了有组织的实地观察和数据收集。GAME-T的研究内容可分为5个子部分：1)陆地通量观测和模拟；2)利用雷达和数值模拟研究降水的日循环；3)Rawinsonde观测和分析，以及GAME-T中的气候描述；4)GAME-T的水文气象数据库（GAIN-T）； 5)水文模拟、区域大气模拟及其耦合。作为“地表通量观测与模拟”，GAME-T成员的地表通量观测从1996年开始部分在季风林（kogo - ma）、水田（素可泰）和带草地的灌木林（Tak EGAT站点）三个点进行，1998年开始主要在这三个点进行。它们也包括在GAME-AAN观测网中。这些活动旨在为建立和改进一维地表模式提供基础数据集，以估算东南亚典型地表的能量和水通量。“陆面模拟”采用Sellers et al.（1996）的简单生物圈模型2 （simple biosphere model 2, SiB2）模拟水田水能循环。成功开展了“山区降水观测”和“利用雷达和数值模拟研究降水日循环”。建成的“GAME-T: GAIN-T水文气象数据库”已成为该地区水文气象研究最基础的资料来源。“建模”有助于成功研究印度支那毁林影响和该地区水资源评价。少