摘要
气候变化背景下东北地区极端大风事件频发,由极端风蚀事件造成的水土流失逐渐引起了相关学者的广泛关注.本研究使用线性分析、Sen+Mann-Kendal趋势分析、Kriging插值法对2005-2020年东北地区极端大风时空特征进行分析,并使用RWEQ风蚀估算模型计算典型风蚀站点的全年土壤风蚀量和极端大风条件下的风蚀量.结果表明:2005-2020年间,东北地区极端大风频次呈显著上升趋势,上升幅度为2.9次·a-1.东北地区极端大风频次的年均值在1～49次·a-1,频次高值区分布在锡林郭勒西北部、呼伦贝尔高原西部及长白山东北部等地.4个典型风蚀点(锡林浩特、新巴尔虎右旗、嫩江、通榆)极端大风对土壤风蚀量的平均贡献率为31％.
Abstract
Under the background of climate change,extreme wind events occur frequently in Northeast China,and the soil erosion caused by these extreme wind events has attracted progressively more attention from scholars.We used the methods of linear analysis,Sen+Mann-Kendal trend analysis,and Kriging interpolation to analyze the spa-tial and temporal characteristics of extreme wind in Northeast China from 2005 to 2020,and used the RWEQ wind erosion estimation model to calculate the annual soil wind erosion of typical wind erosion sites and wind erosion un-der extreme wind conditions.The results showed that the extreme wind frequency in Northeast China presented a significant upward trend from 2005 to 2020,with an increase of 2.9 times·a-1.The annual average extreme wind frequency in Northeast China ranged from l to 49 times·a-1,and the high frequency areas were distributed in the northwest of Xilin Gol,the west of the Hulunbuir Plateau,and the northeast of Changbai Mountain.The average contribution rate of extreme wind to soil wind erosion in four typical sites(Xilinhot,New Barhu Right Banner,Nenjiang,and Tongyu)was 31％.
基金项目
国家重点研发计划项目(2021YFD1500701)
维普
万方数据