Response of Spatial and Temporal Patterns of Water Erosion Dynamic Factors to the Main Atmospheric and Oceanic Circulation Patterns in the Chinese Mollisol Region During 1960—2020

• Published in: Shui tu bao chi xue bao Vol. 38; no. 5; pp. 102 - 115
• Main Authors: GAO Xiaoyu, ZHENG Fenli, HU Wentao, ZHENG Runhe, FU Jinxia, ZHANG Jiaqiong, LIU Gang, LI Zhi
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Journal of Soil and Water Conservation 01.10.2024
• Subjects: atmospheric and oceanic circulation patterns; extreme precipitation; the chinese mollisol region; water erosion dynamic factors
• ISSN: 1009-2242
• DOI: 10.13870/j.cnki.stbcxb.2024.05.007

[Objective] A study on the spatial and temporal patterns of water erosion dynamic factors and their responses to atmospheric and oceanic circulation patterns in the Mollisol region of Northeast China is crucial for preventing and controlling soil erosion in the context of frequent extreme precipitation events. [Methods] Four water erosion dynamic factors, including rainfall erosivity (R), heavy rainfall (R50p), very wet day precipitation (R95p) and the maximum five-day rainfall (R5d), were selected to characterize water erosion dynamic factors. Based on daily rainfall data from 1960 to 2020, the spatial and temporal patterns of the water erosion dynamic factors in the Chinese Mollisol region in 1960—2020 were analyzed using the moving average, wavelet analysis, Sen's method and Mann-Kendall test methods, and the responses of water erosion dynamic factors to atmospheric and ocean circulation patterns were analyzed. [Results] (1) The annual rainfall erosivity R varied from 1 145.36 to 3 575.94 (MJ·mm)/(hm2·h·a)