云南玉龙雪山第四纪冰期与冰川演化模式

云南玉龙雪山高峰区有现代冰川１９条，面积１１．６１Ｋｍ＾２，冰川融水汇入金沙江。在现代冰川外围有丰富的古冰川遗迹，可划分３次更新世冰期，即大理、丽江和云杉枰冰期。相当于欧洲阿尔卑斯的玉木里斯和民德冰期。其中以丽江冰期冰川规模最大，当时，河水冰期的白水河冰川长２．５Ｋｍ，冰川 演化模式与梅里雪山、贡嘎山东坡相同，均属藏东南型，而与青藏高原广大高山区以例数第三次冰不川最大规模有别。主要是它们位于青藏高

Quaternary Glaciation and Glacier Evolution in the Yulong Mount, Yunan

The Yulong Mount is Located in 27° 10/ -27° 40' N, 100° 09' -100° 20' E. It is the southmost snow-covered mountain in China and the southmost maritime glacier in the Eurasia. Its main peak (Sien-Tzu-Tou) is 5 596 m a.s.l.. There are 19 glaciers in the mount area with an area of 11.61 km, whose meltwater flows into the Jingsha River. Outside the glacier there are many relics of ancient glaciers, that can be divided into three Pleistocene glaciations, I.e., Dali, Lijiang and Yushaping ice age, equivalent to the Wurm, Riss and Mindel in the Alps. The Lijiang ice age was the biggest, when the Baishui Riv- er Glacier was 11 km long, with terminus at 2 860 m a.s.l., Lower than the margin (3 100-3 200 m a.s.l.) of the peidont glacier in the Yunshaping ice age and 2.5 km longer than that in the last glacial maximum of Dali ice age. The glacier evolution in the Yulong Mount is the same as in the Mairi Mount and the east slope of the Gongga Mountains, those all belong to the Southeast Tibet type but different to those in many highmountains in the Qinghai-Tibetan Plateau. In Yulong Mount the uplift age and height as well as cli- mate condition are different from the interior plateau. Resently, the glaciers are changing slightly. They had retreated about 100-150 m and their termini had rosen about 50 m from 1982 to 1998, while during 1997-1998 the Baishui Glacier was advancing a little.