摘要
基于Arc GIS10.1软件操作平台,利用分辨率为30 m的DEM高程数据和Google Earth卫星地图,结合野外考察等方法,以元谋盆地为研究对象进行研究,结果表明:元谋盆地"第四纪古冰川地貌"与经典的冰川地貌相去甚远;末次冰盛期(LGM)雪线的高度至少在海拔3 700 m以上;"元谋东山冰期"的AAR值最大为0.34,最小为0.04,远低于正常山地冰川发育值0.6;植物化石和孢粉显示第四纪以来元谋盆地的植被主要以热带、亚热带植被为主,缺乏高海拔耐寒的植物孢粉。这些事实表明,元谋不可能存在第四纪冰川。
Yuan mou basin has been studied by means of the operation platform of ArcGis 10. 1, meanwhile, by using the original data of DEM （ spatial resolution ： 30m）, satellite map of Google Earth and the method of the filed investigation. The result indicated that it exists a significant difference between the Quaternary ancient glacial landform and the classic glacial landform in Yuan mou basin. The Last Glacial Maximum （LGM） snow line of at an altitude of 3 700 m at least; the maximum value of AAR was 0. 34, and the minimum value was 0.04 during ＂Yuanmou Dongshan Glacial Period＂, which was far below the normal value of mountain glaciers 0.6 ; the tropical and subtropical as the main vegetation from the pollen data, lack of high - altitude hardy plant pollen in Yuanmou basin since the Quaternary. These facts indicate that there is no Quaternary glacier in Yuanmou.
作者
朱正峰
苏怀
董铭
ZHU Zheng - feng SU Huai DONG Ming(College of Tourism and Geographical Sciences, Yunnan Normal University, Kunming 650500, Yunnan, Chin)
出处
《云南地理环境研究》
2016年第4期70-76,F0003,F0004,共9页
Yunnan Geographic Environment Research
基金
国家自然科学基金项目"元谋盆地第四纪湖相
黄土地层记录的干热河谷演化历史研究"(41362010)
国家自然科学基金项目"云南元谋上新世-更新世初气候转型期的孢粉记录"(41462007)资助
关键词
元谋
第四纪冰川
雪线
AAR
花粉
Yuanmou
Quaternary glacier
Snow line
AAR
Pollen
