The regional asymmetric effect of increased daily extreme temperature on the streamflow from a multiscale perspective: A case study of the Yellow River Basin, China
The regional asymmetric effect of increased daily extreme temperature on the streamflow from a multiscale perspective: A case study of the Yellow River Basin, China
复制标题
多尺度视角下逐日极端气温升高对径流的区域不对称影响——以中国黄河流域为例
DOI：
10.1016/j.atmosres.2019.06.003
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发表时间：
2019
影响因子：
5.5
通讯作者：
Wang Yu
中科院分区：
文献类型：
--
作者：
Chen Lei;Chang Jianxia;Wang Yimin;Peng Shaoming;Li Yunyun;Long Ruihao;Wang Yu
全球变暖造成了严重的区域水安全风险，从水文循环理论来看，每日极端温度也可能对径流量带来影响，这可能比平均温度更重要。因此，基于最高或最低气温变暖情景的水平，选择各种气象数据集，利用可变入渗能力(VIC)模型从多尺度角度评估日极端气温升高对径流的非对称影响。模式模拟表明，径流对最高温度的响应比对最低温度的响应有更大的变化，径流与最高温度和最低温度的关系均呈抛物线向上的响应函数，但响应函数随增温类型的不同而不同。此外，季节和月历时曲线的结果表明，最高气温和最低气温的升高表现出相似的响应，导致汛期径流的比例增加(Tmin：0.16-0.53%/°C；Tmax：0.11-0.51%/°C)。当最低气温升高时，该区域的原始气温越高，汛期径流所占的比例越大。然而，当最高温度升高时，会出现相反的效果。
Global warming has caused severe regional water security risks, and from the theory of the hydrological cycle, the daily extreme temperature could also bring an impact on the streamflow volume, which could be even more important than the average temperature. Therefore, based on the level of the maximum or minimum temperature warming scenarios, a variety of meteorological datasets were selected to assess the asymmetric effect of increased daily extreme temperature on the streamflow from a multi-scale perspective by using the Variable Infiltration Capacity (VIC) model. Model simulations indicate that the streamflow experiences more significant changes in response to the maximum temperature than in response to the minimum temperature, and the relationships of streamflow with both the maximum and minimum temperatures show an upwards parabolic response function, but the response function varies with the type of warming. Additionally, the seasonal and monthly duration curves results show that the increases in both the maximum and minimum temperatures demonstrate a similar response that leads the proportion of the flood period streamflow to be increased (Tmin: 0.16–0.53%/°C;Tmax: 0.11–0.51%/°C). When the minimum temperature increases, the higher the original temperature in the region, the greater the proportion of the flood period streamflow increases. However, when the maximum temperature increases, the opposite effect occurs.