摘要
通过考察、地衣测年、树轮资料、冰岩芯资料、文史资料、及有关公式推算等,对天山和祁连山小冰期的年代、气候、冰川及地表迳流等的变化进行了研究。并同北半球其它地区进行了对比,初步总结了中国西北地区小冰期的基本概况。
The little ice age had begun from early 15 C. to end of 16 C. in Nor-
thwest China. In the Northern Hemisphere, the age beginning time of the
Little Ice Age postponed from north to south from west to east, and from
humid to arid area. In Northwest China, the physical environment has been
changing. The annual temperature has risen about 1-1.3℃, precipitation
has decreased by 50-78mm, evaporation has incresed by 7%, consequently,
the glacier area has shrunk about 21-46%, and the reduction of 14% in
runoff resulted from the decrease to less than 10% in meltwater supply pro-
portion of rivers. The trend of climate variation is dry-warm since the Li-
ttle lce Age.
出处
《干旱区资源与环境》
CSCD
1991年第3期64-74,共11页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金9488007号大型项目
中国科学院87-45-03号重大项目
关键词
水冰期
冰川变化
西北地区
中国
The Little Ice Age
Age Determination Data
Glacier Variation
Rain-heat Composition
E. L. A. equation
