摘要
利用青藏高原地表热量平衡和长期地温观测的资料探讨高原沙漠化与冻土的相互作用，发现沙丘下或厚沙层覆盖地段下的地温较邻近天然无沙地表有所升高，而薄沙层覆盖地段下的地温反而比天然无沙地表有降低的趋势。分析造成高原冻土区沙漠化的因素有些与其它沙漠化区相似，但有些因素与高原冻土有关并具有特殊性。高原冻土层与土地沙漠化二者之间相辅相成、相互制约、相互作用、协调演化，构成了目前高原冻土区生态平衡系统。
The observed data of ground temperature and ground surface heat balance were used to analyze the interaction between permafrost and desertification on the Qinghai-Tibet plateau. The results showed that ground temperature under sand dune or thick-layer sand is higher than that of the sand-free land surface, whereas ground temperature under thin-layer sand is lower than that of the sand-free land surface. In spite of the similarity between factors resulting in desertification on the plateau and other areas, some factors are related with plateau permafrost and have their own characteristics, and it is such interaction that results in the concerted succession and the present ecological system in permafrost area on the plateau.
出处
《中国沙漠》
CSCD
北大核心
2002年第1期33-39,共7页
Journal of Desert Research
基金
国家自然科学基金(491710220)
国家与中国科学院青藏高原项目(KZ951-A1-204-3-4)
中国科学院重点基金
