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1992年中德联合科学考察队在穿越青藏高原东部地区过程中,对地质、地貌野外观测结果表明:青藏高原不存在更新世统了大冰盖,数十个热释光年代数据和石英颗粒电子显微镜扫描表面结构特征都证实了这一结论:正如1989年中德联合科学考察一样,在西藏昌都西北侧海拔4600m左右再次找到树龄超过1.25ka的古柏树,它将有助于了解这一地区1.5ka以来的气候史.经对侧碛和终碛垄上树木年轮观测,证实近代冰川前进发生在公元1820～1860年之间.
During the course of crossing the eastern Qinghai-Tibet Plateau in 1992, the Sino-German joint scientific expedition team conducted field observations of geology and geomorphology to show that the Pleistocene large ice sheet, dozens of thermoluminescence data and quartz particle electron Microscopic scanning of the surface features confirms this conclusion: Just as the Sino-German Joint Scientific Expedition in 1989 found the ancient cypress trees older than 1.25 ka at about 4600 m above sea level in the northwestern part of Qamdo, Tibet, it would help to understand the region 1.5 The climate history since ka has been observed by the tree rings on the opposite moraines and the terminal moraine, confirming that the advance of modern glaciers occurred between 1820 and 1860 AD.