| 羊卓雍湖流域湖水稳定同位素循环过程研究 |
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| 引用本文： | 巩同梁,田立德,刘东年,姚檀栋,尹常亮,余武生,刘忠方.羊卓雍湖流域湖水稳定同位素循环过程研究[J].冰川冻土,2007,29(6):914-920. |
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| 作者姓名： | 巩同梁 田立德 刘东年 姚檀栋 尹常亮 余武生 刘忠方 |
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| 作者单位： | 1. 北京师范大学, 水科学研究院, 北京, 100875;2. 西藏水利规划勘测设计研究院, 西藏, 拉萨, 850000;3. 中国科学院, 青藏高原研究所环境与过程实验室, 北京, 100085;4. 中国科学院, 寒区旱区环境与工程研究所, 冰冻圈科学国家重点实验室, 甘肃, 兰州, 730000;5. 青海省, 海西洲气象局, 青海, 德令哈, 817000 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2005CB422002)，国家科技攻关计划项目(2005BA901A11)，中国科学院重要方向项目(KZCX3-SW-339)，国家自然科学基金创新群体项目((40121101)，国家自然科学基金委项目(40571039)资助 |
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| 摘 要： | 基于卓雍错流域2004年降水、河水、湖水中δ18O的监测结果,结合内陆湖水循环稳定同位素蒸发分馏模型,探讨了青藏高原南部羊卓雍湖水中稳定同位素的变化过程.研究表明:羊卓雍现代湖水中-5.9‰的δ18O平均值,相对应于当地相对湿度介于54%~58%的气候条件下,这是湖水蒸发分馏作用的最后结果.此外,入湖河水中δ18O变化也对湖水中平衡δ18O有一定的影响,而湖水温度的直接影响可以乎略.湖水中δ18O对入湖水δ18O的波动的调节能力很强,对于入湖水中δ18O大的波动,只有不到50 a的时间,湖水中稳定同位素会重新达到平衡.
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| 关 键 词： | 羊卓雍湖 δ18O 水循环过程 羊卓雍湖 δ18O 水循环过程 |
| 文章编号： | 1000-0240（2007）06-0914-07 |
| 收稿时间： | 2007-03-06 |
| 修稿时间： | 2007-06-21 |
A preliminary Study of Stable Isotope Cycle Processes in Lake Water in the Yamzho Lake Basin |
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| GONG Tong-liang,TIAN Li-de,LIU Dong-nian,YAO Tan-dong,YIN Chang-liang,YU Wu-sheng,LIU Zhong-fang.A preliminary Study of Stable Isotope Cycle Processes in Lake Water in the Yamzho Lake Basin[J].Journal of Glaciology and Geocryology,2007,29(6):914-920. |
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| Authors: | GONG Tong-liang TIAN Li-de LIU Dong-nian YAO Tan-dong YIN Chang-liang YU Wu-sheng LIU Zhong-fang |
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| Institution: | 1. Institute of Water Science, Beijing Normal University, Beijing 100875, China;2. Tibet Institute of Water Resource Survey Planning Design and Research, Lhasa Tibet 850000, China;3. Environmental and Processes Laboratory, Institute of Tibetan Plateau Research, Beijing 100085, China;4. State Key Laboratory of CryosphericScience, CAREERI, CAS, Lanzhou Gansu 730000, China;5. Qinghai Haixi Meteorological Station, Delinhha Qinghai 817000, China |
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| Abstract: | The stable isotope change in the Yamzho Lake Basin is discussed based on the observed results of stable isotope of precipitation,river and lake water in 2004 and on the stable isotope fractionation model in a closed lake.This study shows that the present-5.9‰ of Yamzho Lake δ18O is related to the eventual steady lake δ18O after evaporation enrichment under the relative humidity of around 54%~58%.It is also found that the input δ18O to the closed lake has also affected the eventual δ18O after evaporation enrichment.However,the impact of the lake water temperature has little effect on the steady lake δ18O.The lake itself has a strong adjustment to the input δ18O change.For the large change of input δ18O,the Yamzho Lake δ18O can reach another steady state in less than 50 years. |
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| Keywords: | Yamzho Lake δ18O hydrological cycle process Yamzho Lake δ18O hydrological cycle process |
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