Changing summer monsoon and environment in tropical Asia

热带亚洲夏季风和环境的变化

基本信息

批准号：
04041076
负责人：
FUJIWARA Kenzo
金额：
$ 13.76万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04041076/
关键词：
Environmental Change Last Gracial Age Monsoon Asia Slope Deposit Peat Layr Laterite Cone Karst Dry Valley 南西モンスーン長期変動デカン高原西部コラート高原ガングセブール石灰岩地域金石併用文化ホアビン文化 IGBP

项目摘要

This research project on long-term change in summer monsoon and environment of tropical Asia was planned in response to IGBP of ICSU to clarify the relationships between global-scale environmental change and mankind activities.The first objective of this project is to restore the environmental change of tropical Asia after last interglacial with time scale of several thousand years. In order to achieve the objective, we conducted field research for microrelief, soils and vegetation in southwestern part of India, Thailand and Indonesia where have been apt to be influenced by southwestern monsoon from the Indian Ocean since last interglacial. As a result, we made synoptic chronological tables on environmental change after the late Quaternary in each region. For further reconstruction of terrestrial paleoenvironments, it is required to develop some methodology / techniques, for example, paleopedology, geomorphology and palynology.The second objective is to distinguish natural environmental change from artificial effects. We also collected data from archeological reports and historical records published by concerned institutes to clarify the relation between natural environment and human influence. Human impact on terrestrial environment, particularly that of deforestation and agriculture, was also indicated by the studies in India, Indonesia, Thailand and China, using geomorphological and palynological records.For the further study, it is necessary to elucidate the change in southwestern monsoon over wide area by comparing the data on land which we got from the field survey with the data from the analysis for core samples of deep sea drilling in the Indian Ocean and glacial fluctuation in Himalaya. From the view point of climatology, the studies of mutual relationship between high-latitude and low-latitude atmospheric circulation are necessary to understand global mechanism of environmental change.

这个关于夏季风和热带亚洲环境的长期变化的研究项目是响应ICSU的IGBP而计划的，旨在阐明全球范围的环境变化与人类活动之间的关系。该项目的首要目标是恢复环境变化末次间冰期之后的热带亚洲，时间尺度为数千年。为了实现这一目标，我们对自末次间冰期以来易受印度洋西南季风影响的印度、泰国和印度尼西亚西南部地区的微地貌、土壤和植被进行了实地研究。由此，我们制作了各地区第四纪晚期以后环境变化的概要年表。为了进一步重建陆地古环境，需要发展一些方法/技术，例如古土壤学、地貌学和孢粉学。第二个目标是区分自然环境变化与人为影响。我们还收集了有关机构发表的考古报告和历史记录的数据，以阐明自然环境与人类影响之间的关系。印度、印度尼西亚、泰国和中国利用地貌和孢粉学记录进行的研究也表明了人类对陆地环境的影响，特别是森林砍伐和农业的影响。为了进一步研究，有必要阐明西南季风对陆地环境的影响。通过将实地调查获得的陆地数据与印度洋深海钻探和喜马拉雅冰川波动的岩心样本分析数据进行比较，对大范围区域进行了比较。从气候学的角度来看，研究高纬度和低纬度大气环流之间的相互关系对于了解全球环境变化的机制是必要的。