期刊论文

Cheng, B.

中文

地理学报

0375-5444

2010

65

11

1336-1344

西部环境变化国家引智创新群体计划（111计划）（B06026） 国家自然科学基金项目（40721061 90502008 40871093）

本校为第一且通讯机构

在青藏高原共和盆地中的内陆湖泊——达连海获取40.92m长的湖泊岩芯（DLH钻孔）,选用植物残体作为测年材料,利用AMS14C测年技术建立可靠的地层年代序列,对岩芯进行孢粉分析,重建该地末次冰消期以来的古植被和古环境。末次冰消期以来达连海周围山地在14.8～12.9Cal ka BP和9.4～3.9Cal ka BP时段曾发育森林,气候较湿润,达连海附近盆地发育的荒漠草原盖度增加或演化为草原;在15.8～14.8CalkaBP、12.9～9.4Cal ka BP和3.9～1.4Cal ka BP时段该地气候比较干旱,依据干旱的程度周围山地森林退化或消失,盆地内发育盖度较低的荒漠草原或草原化荒漠。1.4Cal ka BP以来湿度有所增加,发育草原植被类型。依据...

This paper presents a high-resolution pollen record from a 40.92-m-long sediment core taken from Dalianhai Lake, a terminal lake situated in the Gonghe Basin, northeast Tibetan Plateau, in order to reconstruct the vegetation and climate history in the period from the last deglaciation through the Holocene. The 158000-yr chronology of the sediment core was controlled by ten AMS 14C dates on plant remains. The result of pollen analysis shows that six pollen zones can be partitioned in the whole pollen assemblages, and each zone is mainly characterized by the growth and decline of tree or herb po...