雅鲁藏布江流域降水中氧稳定同位素的时空变化(英文)

编号 zgly0001586623

文献类型 期刊论文

文献题名 雅鲁藏布江流域降水中氧稳定同位素的时空变化(英文)

作者 刘忠方  田立德  姚檀栋  巩同梁  尹常亮  余武生 

作者单位 InstituteofTibetanPlateauResearchCAS  InstituteofTibetanPlateauResearch  CAS  InstituteofTibetanWaterResourceReconnaissanceandDesigning  KeyLaboratoryofCryosphereandEnvironment  ColdandAridRegionsEnvironmentalandEngineeringRese 

母体文献 Journal of Geographical Sciences 

年卷期 2007年03期

年份 2007 

分类号 P426.65 

关键词 YarlungZangboRiverBasin  δ18O  precipitation  temporalandspatialvariations 

文摘内容 This paper reveals the temporal and spatial variations of stable isotope in precipita-tion of the Yarlung Zangbo River Basin based on the variations of δ18O in precipitation at four stations (Lhaze,Nugesha,Yangcun and Nuxia) in 2005. The results show that δ18O of pre-cipitation has distinct seasonal changes in the Yarlung Zangbo River Basin. The higher value of δ18O occurs in spring prior to monsoon precipitation,and the lower value occurs during monsoon precipitation. From the spatial variations,with the altitude-effect and rainout process during moisture transport along the Yarlung Zangbo River Valley,18O of precipitation is gradually depleted. Thus,δ18O of precipitation decreases gradually from the downstream to the upstream,and the lapse rate of δ18O in precipitation is approximately 0.34‰/100m and 0.7‰/100km for the two reasons. During monsoon precipitation,spatial variation of δ18O in precipitation is dominated by the amount effect in the large scale synoptic condition.