摘要
聂拉木气象站降水中 δ18O的变化表明 ,夏季降水中 δ18O为一低值阶段 ;冬季降水中 δ18O总的来说为一高值阶段 ,但冬季暴风雪中δ18O的值和夏季强的季风活动中降水的δ18O一样很低。由于该地区冬季降水十分活跃 ,冬季降水中 δ18O的变化对该地区冰芯记录将产生重要的影响。首先是用δ18O的季节变化来对冰芯定年产生一定的困难 ,其次喜马拉雅山中段冰芯中的δ18O记录不仅包括了夏季季风活动的强弱信息 ,而且冬季强的暴风雪过程也记录在内。
Study on δ 18 O in precipitation at Nyalam in the south slope of the Himalayas shows that the δ 18 O in winter precipitation in the south of the Himalayas is quite different from that in the north of the Tibetan Plateau. δ 18 O in summer is characterized by low value. In winter, δ 18 O in precipitation is generally high. However, strong snow storm is characterized by extremely low value of δ 18 O in precipitation, which is in the same level as in the summer period. This phenomenon has an obvious effect on the ice core record in the south of the Tibetan Plateau, for the frequent snow storm in the south of Himalayas. On the one hand, the complexity of seasonal variation of δ 18 O in precipitation in the south to the Himalayas results in the difficulty of ice core dating in this area. On the other hand, δ 18 O in the ice core record in the south of the Tibetan Plateau includes not only the signal of summer monsoon, but also the winter storm.
出处
《气象学报》
CSCD
北大核心
2001年第4期509-512,共4页
Acta Meteorologica Sinica
基金
国家重点基础研究发展规划 (G1 9980 40 80 0 )
中国科学院创新方向项目 (KZCX2 -3 0 1 )
中国科学院寒区旱区环境与工程研究所创新项目 (CACX-2 1 0 5 0 6)
