气候变化背景下吉林省风蚀气候侵蚀力时空特征

发布时间：2019-02-16 13:15

【摘要】：利用吉林省50个气象站1961—2015年的观测资料,计算了吉林省不同区域的风蚀气候因子指数,并分析其变化特征及其影响因子。结果表明:风蚀气候因子指数C值从1月开始逐渐升高,在4月达到最高,7月最低。C值在季节变化上表现为春季冬季秋季夏季。全年尺度上,C值呈显著的降低趋势(p0.001),倾向率为-18.7/10a。春季、秋季和冬季C值降低趋势显著(p0.001),夏季C值降低趋势不显著。年代际变化上,C值在近5a最低。风蚀气候因子指数呈由西向东逐渐递减的空间分布,西部风蚀气候侵蚀力最强,中部次之,东部最弱。吉林省各站风蚀气候因子指数均呈降低趋势,降低最显著的站点主要分布在中部。风速是西部风蚀气候因子指数的主要气候影响因子,大风日数是中部和东部的主要气候影响因子。
[Abstract]:Based on the observational data of 50 meteorological stations in Jilin Province from 1961 to 2015, the climatic factor index of wind erosion in different regions of Jilin Province was calculated, and its variation characteristics and its influencing factors were analyzed. The results showed that the wind erosion climatic factor index C value increased gradually from January to April and reached the highest in April and the lowest in July. The seasonal variation of C value was spring winter autumn summer. In the whole year, the C value showed a significant decreasing trend (p0.001), and the tendency rate was -18.7 / 10a. C value decreased significantly in spring, autumn and winter (p0.001), but not in summer. In Interdecadal variation, C value was the lowest in 5 years. The climatic factor index of wind erosion is gradually decreasing from west to east, and the erosive force is the strongest in the west, the second in the middle and the weakest in the east. The climatic factor index of wind erosion in all stations of Jilin Province showed a decreasing trend, and the most significant stations were mainly distributed in the central part of Jilin Province. Wind speed is the main climatic influence factor of wind-erosion climate index in western China, and the number of windy days is the main climatic influence factor in central and eastern part of China.
【作者单位】：吉林省气象科学研究所;吉林省气象台;
【基金】：公益性行业(气象)科研专项“东北地区春玉米农业气象指标体系研究”(GYHY201206018) 吉林省重点科技攻关项目“基于试验的春玉米生育关键期低温冷害农业气象指标研究”(20150204014NY) 中国气象局省级气象科研所科技创新发展经费项目“气候变化对吉林省黑土地影响评估及适应对策”
【分类号】：S157.1

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