| 引用本文: | 段连强,刘风华,苏永军,等.中国东部季风区降水δ18O与ENSO事件的关系[J].灌溉排水学报,0,():-. |
| Duan Lian-qiang,Liu Feng-hua,Su Yong-jun,et al.中国东部季风区降水δ18O与ENSO事件的关系[J].灌溉排水学报,0,():-. |
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| 摘要: |
| ENSO背景下的水汽源区变化、大尺度对流过程与季风区降水稳定同位素特征关系密切,研究水汽源区变化/ENSO事件与降水同位素特征的响应机制,有助于进一步明确东部季风区的水循环模式。基于我国东部季风区60个站点的降水同位素及气象数据,运用向外长波辐射(OLR)技术研究ENSO事件与稳定同位素之间的响应机制。结果表明：δ18O值在空间上由东南向西北逐渐贫化,受地形影响显著,季节变化冬高夏低,ENSO事件对同位素的分馏状况具有较为规律性的影响；热带辐合带(ITCZ)的变化与季风区稳定同位素特征有着较强的对应关系,局地气候对同位素特征影响深刻。 |
| 关键词: 降水同位素;ENSO;水汽源区;OLR场;东部季风区 |
| DOI： |
| 分类号:P342 |
| 基金项目: |
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| Response mechanism of precipitation δ18O and ENSO events in monsoon region of Eastern China |
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Duan Lian-qiang1,2,3, Liu Feng-hua4, Su Yong-jun4, Kong Shu-qi4
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1.Cangzhou Water Conservancy Survey and Design Institute;2.China Hebei University of Water Resources and Electric Engineering;3.China;4.Hebei University of Water Resources and Electric Engineering
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| Abstract: |
| The variation of moisture sources and large-scale convection process under ENSO background are closely related to the stable isotope characteristics of precipitation in the monsoon area, to research the response mechanism of moisture sources variation/ENSO events and precipitation isotope characteristics is helpful to further clarify the water cycle model in the eastern monsoon region.Based on the precipitation isotopes and meteorological data of 60 stations in the eastern monsoon region of China, the response mechanism between ENSO events and stable isotopes was studied by OLR technology.The results show that the value of δ18O gradually decreases from southeast to northwest in space, which is influenced by topography, and higher in winter and lower in summer, the ENSO event has a regular effect on the fractionation of isotopes.The variation of ITCZ is closely related to the stable isotope characteristics in the monsoon region, and the local climate has a profound influence on the isotope characteristics. . |
| Key words: stable isotopes;ENSO;OLR field;ITCZ;monsoon region of Eastern China |
