| 引用本文: | 金章东,张飞,王红丽,白爱娟,邱新宁.2013.2005年以来青海湖水位持续回升的原因分析[J].地球环境学报,(3):1355-1362 |
| JIN Zhang-dong,ZHANG Fei,WANG Hong-li,BAI Ai-juan,QIU Xin-ning.2013.The reasons of rising water level in Lake Qinghai since 2005[J].Journal of Earth Environment,(3):1355-1362 |
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| 摘要: |
| 地处干旱-半干旱过渡带的青海湖现代和历史时期生态环境变化一直受到关注，特别是2005年以来水位和湖面的逆转回升促使我们重新审视全球变暖情形下我国北方气候和环境的变化及其趋势。本文利用高分辨率的河水化学、（次）降水量和径流量等数据，探讨了2005年以来青海湖湖水的来源和水位持续回升的原因。结果表明，1959年以来青海湖水位的变化与降水量和径流量紧密相关；近些年的持续回升则主要取决于全球增暖情形下区域夏季降水强度和降水量的同时增加，地表径流和/或地下水补给起着一定作用，而冰川融水的贡献则十分有限。我们认为2005年以来青海湖水位持续回升是全球增暖情形下区域降雨模式的改变、降水量和径流量增加，以及流域植被生态改善的综合效应。 |
| 关键词: 湖泊水位 降雨模式 径流量 全球增暖 青海湖 |
| DOI：10.7515/JEE201303008 |
| CSTR： |
| 分类号:P343.3 |
基金项目:国家重点基础研究发展计划(2013CB956402)；国家自然科学基金(41225015，40873082)
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| The reasons of rising water level in Lake Qinghai since 2005 |
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JIN Zhang-dong1,2, ZHANG Fei1, WANG Hong-li1, BAI Ai-juan1, QIU Xin-ning4
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1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of
Sciences, Xi′an 710075, China; 2.School of Human Settlement and Civil Engineering, Xi′an Jiaotong University,
Xi′an 710049, China; 3.Department of Atmosphere Sciences, Chengdu University of Information Technology,
Chengdu 610225, China; 4.The Bureau of Hydrology and Water Resources of Qinghai Province, Xining 810001, China
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| Abstract: |
| Much attention has been paid to the changes in modern and past ecology and environment in Lake Qinghai located at the transitional zone of arid and semi arid, in particular after its rising water level and area since 2005, pushing us to re evaluate climatic and environmental conditions and trend in the northern China under the scenario of global warming. In this paper, using high resolution river water chemistry, in situ measured precipitation, individual rainfall and water discharge data, the sources of lake water and the reasons of rising water level in Lake Qinghai since 2005 were discussed. The results indicated that the variation in water level since 1959 in Lake Qinghai was related closely with the changes in both precipitation and runoff and that the rising water level in recent years in Lake Qinghai chiefly depended upon both increases in intensity of individual summer rainfall and annual precipitation under global warming. Meanwhile, discharge of river and/or groundwaters might also play a role in the rising water level since 2005, but the contribution of glacial melting water, if have, is very limited. We concluded that the rising water level in Lake Qinghai since 2005 is a comprehensive effect of changing rainfall pattern, increasing both precipitation and runoff, and improving grass vegetation within the catchment under the scenario of global warming. |
| Key words: Lake water level rainfall pattern water discharge global warming Lake Qinghai |
