湖泊科学2009，Vol.21Issue(6)：819-826,8.
西藏普莫雍错不同岩芯环境指标的对比研究及其反映的近200年来环境变化
Environmental changes reflected by a comparative proxy study among multiple cores from Pumoyum Co, Tibet in the last 200 years
摘要
Abstract
Four sediment cores were collected at three sites from Pumoyum Co, Southern Tibet. Sedimentation age was constructed by using ~(210)Pb and ~(137)Cs measurements from one short core. Environmental proxies such as total organic carbon, inorganic carbon, grain size and element concentrations were analyzed for upper parts of other three cores. The proxies from different cores were compared and then environmental changes during the last ca. 200 years were discussed. Although proxies changing trends of different cores are similar, obvious differences appear in both detailed variations and proxies values, probably resulting from different water depth, underwater landform conditions and distances to rivers among the sites. Environment condition in this area was stable before 1900AD, but it fluctuated during 1900-1940AD with enhancement of surface erosion and increased sedimentation rate. Remarkable changes took place at about 1940AD, showing that the temperature increased greatly, grain size of sediments became coarser and the lake was in the state of shrinkage, indicating environment in this area changed to a warm/dry state.关键词
湖泊沉积物/多岩芯/环境变化/普莫雍错/青藏高原Key words
Lake sediment/ multiple cores/ environmental changes/ Pumoyum Co/ Tibetan Plateau分类
天文与地球科学引用本文复制引用
王君波,朱立平,鞠建廷,谢曼平,汪勇..西藏普莫雍错不同岩芯环境指标的对比研究及其反映的近200年来环境变化[J].湖泊科学,2009,21(6):819-826,8.基金项目
国家自然科学基金项目(40871099,40571172)资助. （40871099,40571172）
