长江中下游湖泊热浪的气水替代特征

IF 4.7 2区 地球科学 Q1 WATER RESOURCES
Zihan Zhu , Wei Wang , Heng Lyu , Bo Wang , Zhiwen Wen , Qiuxiang Jin
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引用次数: 0

摘要

研究区域本研究以长江流域中下游面积大于100 km2的17个湖泊为研究对象。本研究比较了长江中下游地区17个湖泊的湖泊热浪与大气热浪指标的时空差异,并阐明了两种热浪的强度差异。该研究表明,空气-水替代法在表征该地区湖泊热浪方面是无效的。与大气热浪相比,研究区湖泊热浪具有频率高、强度低、持续时间长等特点。在长江中下游地区,湖泊热浪的发生频率和持续时间明显增加。在年际时间尺度上,湖泊热浪的年总持续时间比大气热浪的增加快0.8 d / a,频率比大气热浪的增加快1.2倍,但平均强度比大气热浪慢0.3 K / a。但两次热浪之间的长期变化率的差异没有明显的空间格局。虽然气温(4.41 K,占总量的94.23 %)是影响湖泊热浪平均强度的最大因素,但其他气象变量共同调节湖泊热浪强度,不可忽视。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Air-for-water substitution in characterizing lake heatwaves in the middle and lower reaches of the Yangtze River Basin

Study region

This study focuses on seventeen lakes with surface area larger than 100 km2 located in the middle and lower reaches of the Yangtze River Basin, China.

Study focus

This study compares the spatiotemporal differences between lake heatwave and atmospheric heatwave metrics and elucidates the intensity differences between two heatwaves across seventeen lakes in the middle and lower reaches of the Yangtze River Basin.

New hydrological insights for the region

This study demonstrated that air-for-water substitution is invalid in characterizing lake heatwaves in this region. Compared to atmospheric heatwaves, lake heatwaves in the study region are characterized by higher frequency, lower intensity, and longer duration. Significantly more frequent and longer-lasting lake heatwaves are observed in the middle and lower reaches of the Yangtze River. At the interannual timescale, lake heatwaves are increasing faster than atmospheric ones by 0.8 d per decade in total annual duration and 1.2 times as fast in frequency, but more slowly by 0.3 K per decade in average intensity. But the difference in long-term change rates between two heatwaves exhibits no discernible spatial pattern. Although air temperature (4.41 K, 94.23 % of the total) is the largest contributor to the average intensity of lake heatwaves, other meteorological variables collectively modulate lake heatwave intensity and cannot be neglected.
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来源期刊
Journal of Hydrology-Regional Studies
Journal of Hydrology-Regional Studies Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)
CiteScore
6.70
自引率
8.50%
发文量
284
审稿时长
60 days
期刊介绍: Journal of Hydrology: Regional Studies publishes original research papers enhancing the science of hydrology and aiming at region-specific problems, past and future conditions, analysis, review and solutions. The journal particularly welcomes research papers that deliver new insights into region-specific hydrological processes and responses to changing conditions, as well as contributions that incorporate interdisciplinarity and translational science.
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