Relationships between delta O-18 in summer precipitation and temperature and moisture trajectories at Muztagata, western China
作者: |
Yu, W.S., et al. |
期刊名称: |
Science in China Series D-Earth Sciences |
发表年度: |
2006 |
卷: |
49 |
期: |
1 |
联系作者: |
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页码: |
27-35 |
摘要: |
Based on summer observations of stable isotope of precipitation at Muztagata, western China, during 2002-2003, this paper presents the relationship between delta O-18 in precipitation and air temperature, and discusses the effect of moisture transport on 9180 in precipitation. Results show that air temperature correlates positively with delta O-18 in precipitation, and the temperature effect controls the delta O-18 of precipitation in this area. The Muztagata region exhibits high delta O-18 values in summer precipitation, similar to those shown at stations in adjacent regions. According to the results of our model set up to trace the moisture trajectories, the westerlies and local moisture circulation contribute to variations of oxygen isotopes in precipitation. In addition, the impacts of the moisture transport distance, the moisture transport level, and the incursion of the polar air mass also influence the variations of delta O-18 in precipitation. The moisture origins and transport mechanisms also contribute to the variation of delta O-18 in precipitation at Muztagata.
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