TheChemicalRecordsintheSurfaceLayerofaGlacierinTanggulaMts.,TibetanPlateau
- 出版年：1998
- 作者：XIAO Cnn-De；QIN Da-He；YAO Tan-Dong；HUANG Cui-Lan；SHENG Wen-Kun；YANG Zhi-Hong
- 单位1：Laboratory of Ice and Cold Regions Enveiroamenl
- 语种：英文
- 作者关键词：Tanggula Mts；Tibetan Plateau；glaclr；chemical records
- 起始页：458
- 总页数：8
- 刊名：冰川冻土
- 是否内版：否
- 刊频：季刊
- 创刊时间：1979
- 主办单位：中国地理学会中国科学院兰州冰川冻土研究所
- 主编：黄茂桓
- 地址：兰洲市东岗西路260号
- 邮编：730000
- 卷：20
- 期：4
- 核心期刊：中国自然科学核心期刊
摘要
An ice core which is 5 annual layers contained was drilled at Dongkemadi branch glacier,middle of I anggula Mts. The chemical analysis shows the obviously similar variations of the concentra-tions of major canons and anions versus depth. The similarities are ascribed to the same types ofaerosols that most of the ions concentrate and coexist. For instant, the aerosols traosported from thearid regions outsides north of the Tibetan Plateau as well as the high-mineralized saline lakes on theplateau are probablythemain sources of the major ions. However, profile of nitrate is unique comparedlth other species. Themaximum of theconcentrations of the major tons, i.e. Na＋， MgZ＋, Ca'*, andK+， coincides well with the depths of dirty layers, which correspond the accmulation of snowfallsfrom the end of ablation season to late spring, the concentration peaks of theselayers arepossibly dueto dry deposition during the “rare precipitation and dust storm” season. The contrast between the pro-files of chemical species and stratigraphy of ice core suggests that the disturbance of meltwater to thechemical records of ice core is not negligible. we are confirmed therefore by the records of ice core, thatthe continental air masses prevailingly controlling atmospheric environment over Tibetan Plateau mayreach somewhere south of Tanggula Mountain.