Water depth variation and its impact on carbonate content and oxygen isotopes: A study from a satellite lake near Lake Qinghai over the past 7.6 kyr
文献类型：期刊论文
| 作者 | He, Yuxin1; Li, Xiangzhong2,3,4; Cao, Yunning3; Hu, Jing3; Wang, Min2 |
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 2021-01-15 |
| 卷号 | 562页码:6 |
| 关键词 | Lake Gahai Northern Tibetan Plateau Centennial to millennial timescales Volume effect Holocene |
| ISSN号 | 0031-0182 |
| DOI | 10.1016/j.palaeo.2020.110150 |
| 通讯作者 | He, Yuxin(yxhe@zju.edu.cn) ; Li, Xiangzhong(xzhli04@163.com) |
| 英文摘要 | The oxygen isotopic composition of sedimentary carbonate (delta O-18(carb)) provides information on the regional water balance between precipitation and evaporation in a lacustrine system. A volume effect was proposed to explain the abnormally low delta O-18(carb) values in Lake Qinghai on the northern Tibetan Plateau, under the conditions of high evaporation and low water levels, as observed during the early Holocene. Volume effect theory states that the small volume of the lake and its sensitivity to isotopic signals from freshwater discharge control the delta O-18(carb) values. In this study, we present 7.6-kyr records of carbonate content and oxygen isotopes from Lake Gahai, a small and saline satellite lake near Lake Qinghai. The records demonstrate that the water level and lake size of Lake Gahai considerably changed over the past 7.6 kyr, and the volume effect was responsible for the delta O-18(carb) variations. The records also suggest contrasting responses of carbonate precipitation to water depth across different timescales. For example, over the past 7.6 kyr, the carbonate content decreased with increasing lake water levels. This can be explained by gradual water freshening under low evaporation conditions and enhanced connection between Lake Qinghai and Lake Gahai. On the centennial scale, however, the carbonate content varied significantly and was positively correlated with Lake Gahai's water level. Such a variation is probably due to the periodically lower lake water levels and a stronger influence of terrestrial elastic material, which contributed to the dilution of the carbonate content under centennial cool and dry periods. Therefore, in order to advance our understanding of past hydroclimatic variations in the climatically sensitive region, information across different timescales should be separated. |
| WOS关键词 | RADIOCARBON AGE CALIBRATION ; ENVIRONMENTAL-CHANGE ; TIBET PLATEAU ; QAIDAM BASIN ; SEDIMENTS ; CHINA ; TEMPERATURE ; PACIFIC ; RECORDS |
| 资助项目 | National Natural Science Foundation of China[NSFC 41877332] ; National Natural Science Foundation of China[42073071] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41672163] ; Yunnan Provincial Science and Technology Department[202001AV070012] ; Young Elite Scientists Sponsorship Program by CAST[2018QNRC001] ; Youth Innovation Promotion Association CAS[Y201759] |
| WOS研究方向 | Physical Geography ; Geology ; Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:000604584600064 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Yunnan Provincial Science and Technology Department ; Young Elite Scientists Sponsorship Program by CAST ; Youth Innovation Promotion Association CAS |
| 源URL | [http://ir.ieecas.cn/handle/361006/15891]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 通讯作者 | He, Yuxin; Li, Xiangzhong |
| 作者单位 | 1.Zhejiang Univ, Sch Earth Sci, Key Lab Geosci Big Data & Deep Resource Zhejiang, Hangzhou 310027, Peoples R China 2.Yunnan Univ, Yunnan Key Lab Earth Syst Sci, Kunming 650500, Yunnan, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 4.Qinghai Normal Univ, Acad Plateau Sci & Sustainabil, Xining 810016, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Yuxin,Li, Xiangzhong,Cao, Yunning,et al. Water depth variation and its impact on carbonate content and oxygen isotopes: A study from a satellite lake near Lake Qinghai over the past 7.6 kyr[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,562:6. |
| APA | He, Yuxin,Li, Xiangzhong,Cao, Yunning,Hu, Jing,&Wang, Min.(2021).Water depth variation and its impact on carbonate content and oxygen isotopes: A study from a satellite lake near Lake Qinghai over the past 7.6 kyr.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,562,6. |
| MLA | He, Yuxin,et al."Water depth variation and its impact on carbonate content and oxygen isotopes: A study from a satellite lake near Lake Qinghai over the past 7.6 kyr".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 562(2021):6. |
入库方式： OAI收割
来源：地球环境研究所
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