权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Vegetation change by human activities and evaluation of its effect to climate change

人类活动引起的植被变化及其对气候变化的影响评估

基本信息

批准号：
08241105
负责人：
TAKAGI Mikio
金额：
$ 51.84万
依托单位：
Science University of Tokyo (1997-1999)The University of Tokyo (1996)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

1) A system to process huge volume of GAC data efficiently and automatically, connecting many PC's via network, has been developed and GAC data processing has started. It became possible to process one year's data about within one month.2) Mosaic of LANDSAT images of Southeast Asia region was generated automatically and a technique for land cover classification more efficiently and accurately, combining LANDSAT images with NOAA images has been developed. Studies of land cover change detection from time series LANDSAT images are going on.3) A software was developed to build a distributed data base of ground photographs taken for ground validation of land cover classification and vegetation classification and a data base was constructed. This system makes it possible to integrate data bases generated by researchers independently and to archive ground photographic data easily.4) Combining vegetation indexes derived from time series satellite data with temperature and precipitation data, temporal and spatial correlation between seasonal vegetation variations and environmental conditions such as temperature and precipitation becomes clear. There is an interesting discovery that East Siberia, which is extremely cold area in Eurasia, is latest in that forest become green, but is latest in falling leaves.5) A frame work of estimation model for land use change based on agricultural productivity estimation of land was established and validation was made for Thailand. As the basis of productivity estimation a productivity estimation model for paddy rice, which is most important crop in Asia, was developed.6) To improve the reliability of vegetation index estimated from satellite images, techniques for atmospheric correction and geographical correction was developed and implemented. Vegetation data are generated periodically and composite images are generating.

1)开发了多台PC机通过网络高效、自动处理海量GAC数据的系统，并启动了GAC数据处理。2)自动生成东南亚地区陆地卫星图像的镶嵌，并开发出一种更高效、更准确的土地覆盖分类技术，将陆地卫星图像与NOAA图像相结合。3)开发了用于土地覆盖分类和植被分类地面验证的分布式地面照片数据库，并建立了相应的数据库。4)将由时间序列卫星数据得到的植被指数与温度和降水数据相结合，使得植被季节变化与温度、降水等环境条件之间的时空相关性变得清晰。一个有趣的发现是，东西伯利亚是欧亚大陆的极寒地区，森林变绿的时间最晚，落叶的时间最晚。5)建立了基于土地农业生产力估计的土地利用变化估计模型框架，并对泰国进行了验证。作为生产力估算的基础，开发了亚洲最重要的农作物水稻的生产力估算模型。6)为了提高卫星影像植被指数估算的可靠性，开发并实现了大气校正和地理校正技术。定期生成植被数据，并生成合成图像。

项目成果

期刊论文数量（48）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

安岡善文: "ADEOSプログラムにおけるAVNIRの役割" 日本リモートセンシング学会誌. Vol.17(5). 62-67 (1997)

Yoshifumi Yasuoka：“AVNIR 在 ADEOS 计划中的作用”日本遥感学会杂志第 17 卷（5）（1997 年）。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

M.Shinoda,T.Okatani,M.Saloum: "Diurnal variation of rainfall over Niger In the West African Sahel : a comparison between wet and drought years"International Journal of Climate. 19. 81-94 (1999)

M.Shinoda、T.Okatani、M.Saloum：“西非萨赫勒地区尼日尔降雨量的日变化：潮湿年和干旱年的比较”国际气候杂志。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

Toshihiro NEMOTO, Kazuhiko SAKO, Masaru KITSUREGAWA and Mikio TAKAGI: "Implementation of Tertiary Storage File System with Partial Migration Mechanism on an 8mm Tape Archiver and Its Performance Evaluation"IEICE Transactions on Information and Systems. J8

Toshihiro NEMOTO、Kazuhiko SAKO、Masaru KITSUREGAWA 和 Mikio TAKAGI：“在 8 毫米磁带归档机上实现具有部分迁移机制的三级存储文件系统及其性能评估”IEICE Transactions on Information and Systems。