Exploring the contribution of precipitation to water within the active layer during the thawing period in the permafrost regions of central Qinghai-Tibet Plateau by stable isotopic tracing
文献类型：期刊论文
| 作者 | Zhu, Xiaofan1,2; Wu, Tonghua1; Zhao, Lin1; Yang, Chengsong3; Zhang, Huiwen4; Xie, Changwei1; Li, Ren1; Wang, Weihua5; Hu, Guojie1; Ni, Jie1,2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2019-04-15 |
| 卷号 | 661页码:630-644 |
| 关键词 | Precipitation Active layer Permafrost Qinghai-Tibet Plateau Stable isotopic tracing |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2019.01.064 |
| 通讯作者 | Wu, Tonghua(thuawu@lzb.ac.cn) |
| 英文摘要 | Stable isotopic tracing has proven to be a useful tool for assessing surface water source dynamics and hydrological connectivity in permafrost regions. This study has investigated the contribution of precipitation to water within the active layer at three long-term observation sites, including Fenghuoshan (FHS), Hoh Xil (KKXL) and Wudaoliang (WDL), by using isotopic tracer technique and two-component mixing model. The results showed that precipitation was the predominant source for water within the active layer, permafrost and ground ice near permafrost table at the three sites. Precipitation in August was the predominant source for water within the active layer at FHS, and precipitation in September was the main source at KKXL and WDL. The variation of isotopic values at different levels indicated that the water sources within the active layer could vary as the depth increases. The evaporation fractionation of water within the active layer at WDL was noticeable at depths of 0-50 cm, and the evaporation intensity decrease gradually from late June to late September. The relationship of isotopic tracing values between precipitation and water within the active layer at depths of 0-50 cm becomes more significant as the amount of the recently-occurring precipitation increases. Moreover, the relatively higher d-excess in precipitation indicates that local recycled moisture has greater contribution to precipitation. The differences of d-excess in most water within the active layer, permafrost and ground ice near permafrost table revealed that there were isotopic fractionation when precipitation supplying to above-mentioned three water bodies. The precipitation event amounted to 8.1 mm at KKXL can exert 49% +/- 7.1% and 30.8% +/- 3.6% contribution to water within the active layer at depths of 0-10 cm and 10-20 cm, respectively. While the long-period contribution cannot be identified because of the impact of evaporation. The results would provide new insights into the contribution of precipitation to water within the active layer on the QTP, which is also helpful to improve process-based hydrological models in the permafrost regions. (C) 2019 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | GROUND ICE ; SOIL-WATER ; MOISTURE ; HYDROLOGY ; NORTH |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000458408200058 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555565 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wu, Tonghua |
| 作者单位 | 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China 4.Gansu Desert Control Res Inst, State Key Lab Breeding Base Desertificat & Aeolia, Lanzhou 730070, Gansu, Peoples R China 5.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Xiaofan,Wu, Tonghua,Zhao, Lin,et al. Exploring the contribution of precipitation to water within the active layer during the thawing period in the permafrost regions of central Qinghai-Tibet Plateau by stable isotopic tracing[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,661:630-644. |
| APA | Zhu, Xiaofan.,Wu, Tonghua.,Zhao, Lin.,Yang, Chengsong.,Zhang, Huiwen.,...&Shi, Jianzong.(2019).Exploring the contribution of precipitation to water within the active layer during the thawing period in the permafrost regions of central Qinghai-Tibet Plateau by stable isotopic tracing.SCIENCE OF THE TOTAL ENVIRONMENT,661,630-644. |
| MLA | Zhu, Xiaofan,et al."Exploring the contribution of precipitation to water within the active layer during the thawing period in the permafrost regions of central Qinghai-Tibet Plateau by stable isotopic tracing".SCIENCE OF THE TOTAL ENVIRONMENT 661(2019):630-644. |
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来源：寒区旱区环境与工程研究所
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