摘要
对１９９６／１９９７年中国首次南极内陆冰盖考察获得的南极洲伊丽莎白公主地区两个雪坑样品的阴离子、阳离子和δ１８Ｏ进行对比分析，结果表明ＮＯ－３的浓度变化和δ１８Ｏ的变化同相，Ｃｌ－的浓度变化和δ１８Ｏ的变化异相，两者的变化和δ１８Ｏ的变化一样，都形成明显的季节变化层，这为研究者在本地区冰盖内划分年层、建立时间序列提供了重要的依据，但与之相反的是，各种阳离子的时间序列却不明显。另外，两个雪坑中的ｎｓｓＳＯ４２－在１９９５／１９９４和１９９３／１９９２都表现出非常高的浓度值。
Snow samples recovered from two snow pits (2.5m and 3.5m deep) along the route of the 1996/1997 Chinese Traverse in Princess Elizabeth Land,East Antarctica, have been measured for chemical composition and oxygen isotope ratio. In the two snow pits,the seasonal variations of NO - 3 concentrations are partly in phase with the variations of δ 18 O values, while the peaks of Cl - are at the troughs in δ 18 O, but both variations of Cl - and NO - 3 formed the same seasonal variation stratum as the variations of δ 18 O.However, no obvious seasonal variations of cation concentrations were found in the profiles. The results provide a useful tool for dating the snow stratum in this region. Elevated sulfate(SO 2- 4) concentrations found in the profiles of the two snow pits for the period, 1992-1995 may be due to the June 1991 Pinatubo(Philippines) volcanic eruption and August 1991 Cerro Hudson eruption.
出处
《极地研究》
CAS
CSCD
1999年第1期19-24,共6页
Chinese Journal of Polar Research
基金
国家自然科学基金
国家科技攻关计划
中国科学院95重大项目
