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2篇 您的检索式:作者名="A.Numaguti"
    题名 作者 年代 出处 被引量
1Relation between stable isotope in monsoon precipitation in southern Tibetan Plateau and moisture transport history显示文摘The moisture transport history to the south of the Tibetan Plateau was modeled using the meteorological data provided by NCEP in this paper, and the modeled results were compared with the measured δ18O in the south of the Tibetan Plateau. The relation between δ18O in precipitation in the south of the Tibetan Plateau and moisture trajectories was discussed. The results show that the extremely low δ18O in precipitation in the south of the Tibetan Plateau is always related to the moisture from the low-level sea surface evaporation. The long-distance transport of moisture also contributes to low δ18O in precipitation probably due to the rainout process during moisture transport. It is also found that lowδ18O in precipitation is also related with deep layer transport of moisture, and with intensive condensation in the upper layers of the atmosphere, resulting in low δ18O because of depletion of heavy isotopes in deep condensation. However, high δ18O in precipitation whether in monsoon period or not田立德 姚檀栋 A.Numaguti 段克勤 2001Science China Earth Sciences2001,44,S1:30
2青藏高原南部季风降水中稳定同位素波动与水汽输送过程显示文摘利用NCEP气象数据建立模型来追踪青藏高原南部降水的水汽输送过程,并与实测降水中氧稳定同位素数据进行对比分析,讨论了青藏高原南部降水中δ^(18)O波动与水汽输送过程的关系.研究发现降水中极低的δ^(18)O都与低层洋面蒸发水汽输送有关,远距离水汽输送时,水汽输送过程中的降水使得稳定同位素的贫化作用加强,结果实测降水中δ^(18)O很低;降水中低的δ^(18)O值往往伴随着厚层水汽输送,而且高层大气水汽的凝结作用强烈,这一过程也加剧了稳定同位素的贫化,使得实测降水中δ^(18)O很低.而降水中高的δ^(18)O值无论是在季风降雨期的前后还是在季风活动阶段,水汽输送都与高原面上蒸发的水汽有关,而缺乏低海拔洋面蒸发的水汽输送,并且水汽主要来源于北方或西方.模型计算结果与稳定同位素的分馏机理相一致.田立德 姚檀栋 A.Numaguti 段克勤 2001中国科学(D辑)2001,31,B12:27
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