Under the influence of glacial climates in the Quaternary, the lower limit ofpermafrost zone dropped strongly down and a lot of periglacial phenomena were devel-oped in a great part of the Qinghai-Tibetan Plateau beca...Under the influence of glacial climates in the Quaternary, the lower limit ofpermafrost zone dropped strongly down and a lot of periglacial phenomena were devel-oped in a great part of the Qinghai-Tibetan Plateau because of the periglacialenvironment. Among many fossil periglacial phenomena, ice wedge casts received atten-tion for their important environmental significance. In the late 1970s, based on theradioactive carbon dating Guo Dongxin and Zhang Weixin indicated that the展开更多
THE investigations of past global changes reveal strong climatic instability during the lastglaciation. Most terrestrial palaeoclimate records have not given climatic conditionclues in the Penultimate Glaciation. It i...THE investigations of past global changes reveal strong climatic instability during the lastglaciation. Most terrestrial palaeoclimate records have not given climatic conditionclues in the Penultimate Glaciation. It is very necessary for us to know whether the climaticinstability picture is a particular phenomenon occurring only in the last glacial period. In展开更多
基金The note is an achievement of project supported by NSFC.
文摘Under the influence of glacial climates in the Quaternary, the lower limit ofpermafrost zone dropped strongly down and a lot of periglacial phenomena were devel-oped in a great part of the Qinghai-Tibetan Plateau because of the periglacialenvironment. Among many fossil periglacial phenomena, ice wedge casts received atten-tion for their important environmental significance. In the late 1970s, based on theradioactive carbon dating Guo Dongxin and Zhang Weixin indicated that the
文摘THE investigations of past global changes reveal strong climatic instability during the lastglaciation. Most terrestrial palaeoclimate records have not given climatic conditionclues in the Penultimate Glaciation. It is very necessary for us to know whether the climaticinstability picture is a particular phenomenon occurring only in the last glacial period. In
