1961—2018年衡邵干旱走廊地带气候变化特征分析

Analysis on the Characteristics of Climate Change in the Hengshao Arid Corridor from 1961 to 2018

利用衡邵干旱走廊地带1961—2018年的逐月平均气温和降水量,综合分析衡邵干旱走廊地带的气候变化特征。结果表明,近58年来衡邵干旱走廊地带的气候呈暖干趋势,年平均气温上升率为0.157℃/10 a,进入21世纪,气候变暖明显;春季升温贡献最大,气温上升率为0.254℃/10 a;年平均气温以及春季、冬季、秋季平均气温均通过了显著性检验。年降水量呈缓慢减少趋势,减少率为4.3 mm/10 a,未通过显著性检验;以春季降水量的减幅最大,减少率为11.4 mm/10 a。

Based on the monthly average temperature and precipitation in the Hengshao arid corridor from 1961 to 2018, the characteristics of climate change in the Hengshao arid corridor were comprehensively analyzed.The results showed that in the past 58 years, the climate in the Hengshao arid corridor had been warm and dry, with an annual average temperature rise rate of 0.157 ℃/10 a.In the 21 st century, the climate had warmed significantly.Spring contributed the most to the warming, with a temperature rise rate of 0.254 ℃/10 a;the annual average temperature, the temperature of spring, winter and autumn all passed the significance test.The annual precipitation showed a slow decreasing trend with a decreasing rate of 4.3 mm/10 a, which failed the significance test;the decrease of precipitation in spring was the largest, with a decreasing rate of 11.4 mm/10 a.