【摘要】 1997年 9月 ,在喜马拉雅山中段希夏邦马峰北坡达索普冰川海拔 70 0 0m冰雪平台钻取 14m冰芯一支 .1990年以来冰芯中主要离子浓度的变化表明 ,现代环境事件在达索普冰川雪冰中有一定的记录 .已有的证据表明 1991年达索普冰芯中SO4 2 -浓度的最高值最大可能是由海湾战争引发的 1991年春季科威特油井燃烧污染物所致 .冰芯中陆源离子 (如Ca2 + 和SO4 2 -等 )记录与我国西北地区春季沙尘暴具有某些相关性 ,其逐年变化趋势与新疆 13个城市的降尘变化有一定的共性更多还原

【Abstract】 During 1997 September, a 14 m ice core was recovered from an elevation of 7000 m a s l from the Dasuopu Glacier on the northwest margin of Mount Xixabangma in the central Himalayas The variations of major ion concentrations showed that present environmental events had been recorded in the snow of Dasuopu Glacier since 1990 Some evidences indicate that the highest value of SO 4 2- concentration in the core in 1991 may be caused by the pollutants from Kuwaiti oil fires during Persian Gulf War The annual variations of crustal ions (Ca 2+ and SO 4 2- ) concentrations recorded in the firn core may be related to the dust storms happened in spring in northwestern China, and consistent with the variations of dust deposition in 13 cities of Xinjiang Vygur Autonomous Region更多还原