|
|
|
| 论文编号: |
25 |
| 论文题目: |
Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China) and implications for hydroclimatic changes in headwater areas of the Yellow River on the northeastern Tibetan Plateau |
| 英文论文题目: |
Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China) and implications for hydroclimatic changes in headwater areas of the Yellow River on the northeastern Tibetan Plateau |
| 第一作者: |
Li, XZ |
| 英文第一作者: |
|
| 联系作者: |
Li Xiangzhong |
| 英文联系作者: |
Li Xiangzhong |
| 外单位作者单位: |
|
| 英文外单位作者单位: |
|
| 发表年度: |
2017 |
| 卷: |
134 |
| 期: |
|
| 页码: |
150-159 |
| 摘要: |
|
| 英文摘要: |
The water resource issue is one of the most significant problems in the Yellow River basin, and has received much attention from the public and government because of the dramatically decreased Yellow River streamflow in the last several years. In this study, oxygen isotopic compositions of bulk carbonates from Lake Kuhai in the headwaters of the Yellow River were evaluated as an indirect proxy of past Yellow River streamflow in order to place the recent flow reduction in a long-term context. The results indicated that delta 18O values of bulk carbonates from core KHC14-1 generally vary with changes in the Yellow River streamflows related to the precipitation/evaporation (temperature) ratio above the Tangnaihai hydrological station over the past 50 years. In general, the Yellow River streamflow in the headwaters area continued to decrease from the early 1980s to the late 1990s because of decreased precipitation and increased temperature. Then, the streamflow increased with enhancing precipitation over the last two decades. In addition, delta O-18 values of bulk carbonates in the Lake Kuhai core roughly correlate with the streamflows of the upper reaches of the Yellow River recorded by tree ring width over the past 800 years. The enriched delta O-18(BC) values showed that the precipitation/evaporation (P/E) ratio or streamflow was very low and the climate might be very dry in the middle of the 1400s CE in the headwaters of the Yellow River over the past 800 years. Our results suggested that changes in the P/E ratio or streamflow of the upper reaches of the Yellow River were dominated by variations in Indian Summer Monsoon precipitation over a long time scale, consistent with other records from the northeastern Tibetan Plateau. |
| 刊物名称: |
JOURNAL OF ASIAN EARTH SCIENCES |
| 英文刊物名称: |
JOURNAL OF ASIAN EARTH SCIENCES |
| 论文全文: |
|
| 英文论文全文: |
|
| 全文链接: |
http://www.sciencedirect.com/science/article/pii/S1367912016303182 |
| 其它备注: |
|
| 英文其它备注: |
|
| 学科: |
|
| 英文学科: |
|
| 影响因子: |
|
| 第一作者所在部门: |
|
| 英文第一作者所在部门: |
|
| 论文出处: |
|
| 英文论文出处: |
|
| 论文类别: |
|
| 英文论文类别: |
|
| 参与作者: |
|
| 英文参与作者: |
|
|
