论全球现代干燥半干燥沙区晚第四纪的湿润期与干燥期——全球主要现代干燥半干燥沙区晚第四纪以来流沙扩展与固定的初步研究

A PAPER ON THE HUMID AND ARID PERIODS DURING LATE QUATERNARY IN GLOBAL MODERN ARID AND SEMI-ARID SANDY LAND REGIONS

本文分析了全球主要现代干燥半干燥沙区晚第四纪流沙的扩展与固定,今日沙丘活化、沙化的气候背景,人类开发沙区与沙丘活化、沙化的关系;提出沙区湿润期与干燥期的概念及沙区演变规律。

The dominant factors of the climatic changes in the Quaternary arevariations in temperature and humidity. Temperature variations of theQuaternary era have been analysed and the climatic changes over the lasttwenty years have been graphed. However the humidity changes are morecomplex, so they have not been plotted.