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| Water discharge variability of Changjiang （Yangtze） and Huanghe （Yellow） Rivers and its response to climatic changes | |
| 引用本文： | 张喜林,范德江,王厚杰,杨作升.Water discharge variability of Changjiang （Yangtze） and Huanghe （Yellow） Rivers and its response to climatic changes[J].中国海洋与湖沼学报,2014,32(6):1392-1405. |
| 作者姓名： | 张喜林 范德江 王厚杰 杨作升 |
| 作者单位： | [1]Key Laboratory of Submarine Geosciences and Technology of Ministry of Education, Ocean University of China, Qingdao 266100, China; [2]Key Laboratory of Marine Hydrocarbon Resources and Environment Geology, China Geological Survey, Ministry of Land and Resources, Qingdao 266071, China; [3]Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China |
| 基金项目： | Supported by the National Basic Research Program of China(973 Program)(No.2010CB951202);the National Natural Science Foundation of China(Nos.41376055,41030856) |
| 摘 要： | Influences of large-scale climatic phenomena, such as the E1Nifio/La Nifia-Southem Oscillation （ENSO） and the Pacific Decadal Oscillation （PDO）, on the temporal variations of the annual water discharge at the Lijin station in the Huanghe （Yellow） River and at the Datong station in the Changjiang （Yangtze） River were examined. Using the empirical mode decomposition-maximum entropy spectral analysis （EMD- MESA） method, the 2- to 3-year, 8- to 14-year, and 23-year cyclical variations of the annual water discharge at the two stations were discovered. Based on the analysis results, the hydrological time series on the inter- annual to interdecadal scales were constructed. The results indicate that from 1950 to 2011, a significant downward trend occurred in the natural annual water discharge in Huanghe River. However, the changes in water discharge in Changjiang River basin exhibited a slightly upward trend. It indicated that the changes in the river discharge in the Huanghe basin were driven primarily by precipitation. Other factors, such as the precipitation over the Changjiang River tributaries, ice melt and evaporation contributed much more to the increase in the Changjiang River basin. Especially, the impacts of the inter-annual and inter-decadal climate oscillations such as ENSO and PDO could change the long-term patterns of precipitation over the basins of the two major rivers. Generally, low amounts of basin-wide precipitation on interannual to interdecadal scales over the two rivers corresponded to most of the warm ENSO events and the warm phases of the PDO, and vice versa. The positive phases of the PDO and ENSO could lead to reduced precipitation and consequently affect the long-term scale water discharges at the two rivers. |
| 关 键 词： | 长江流域 污水排放 黄河流域 气候变化 流量变化 ENSO事件 太平洋十年涛动 流域降水 |
Water discharge variability of Changjiang (Yangtze) and Huanghe (Yellow) Rivers and its response to climatic changes |
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| Xilin Zhang,Dejiang Fan,Houjie Wang,Zuosheng Yang.Water discharge variability of Changjiang (Yangtze) and Huanghe (Yellow) Rivers and its response to climatic changes[J].Chinese Journal of Oceanology and Limnology,2014,32(6):1392-1405. | |
| Authors: | Xilin Zhang Dejiang Fan Houjie Wang Zuosheng Yang |
| Institution: | 1. Key Laboratory of Submarine Geosciences and Technology of Ministry of Education, Ocean University of China, Qingdao, 266100, China 2. Key Laboratory of Marine Hydrocarbon Resources and Environment Geology, China Geological Survey, Ministry of Land and Resources, Qingdao, 266071, China 3. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao, 266071, China |
| Abstract: | Infl uences of large-scale climatic phenomena, such as the El Niño/La Niña-Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO), on the temporal variations of the annual water discharge at the Lijin station in the Huanghe (Yellow) River and at the Datong station in the Changjiang (Yangtze) River were examined. Using the empirical mode decomposition-maximum entropy spectral analysis (EMDMESA) method, the 2- to 3-year, 8- to 14-year, and 23-year cyclical variations of the annual water discharge at the two stations were discovered. Based on the analysis results, the hydrological time series on the interannual to interdecadal scales were constructed. The results indicate that from 1950 to 2011, a significant downward trend occurred in the natural annual water discharge in Huanghe River. However, the changes in water discharge in Changjiang River basin exhibited a slightly upward trend. It indicated that the changes in the river discharge in the Huanghe basin were driven primarily by precipitation. Other factors, such as the precipitation over the Changjiang River tributaries, ice melt and evaporation contributed much more to the increase in the Changjiang River basin. Especially, the impacts of the inter-annual and inter-decadal climate oscillations such as ENSO and PDO could change the long-term patterns of precipitation over the basins of the two major rivers. Generally, low amounts of basin-wide precipitation on interannual to interdecadal scales over the two rivers corresponded to most of the warm ENSO events and the warm phases of the PDO, and vice versa. The positive phases of the PDO and ENSO could lead to reduced precipitation and consequently affect the long-term scale water discharges at the two rivers. |
| Keywords: | water discharge Changjiang(Yangtze) River Huanghe(Yellow) River empirical mode decomposition maximum entropy spectral analysis large-scale climate factor |
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