宁夏近40多年积温及不同积温期降水量变化研究

Study on the accumulative temperature and the precipitation in the period of the accumulative temperature in Ningxia

选取宁夏22个地面气象站1961-2005年逐日平均气温、逐日降水量资料,统计计算日平均气温稳定通过0℃和10℃期间的积温,结果表明：随着气候的变暖,宁夏各地≥0℃和≥10℃积温呈明显增加趋势,近19 a增加显著;≥10℃积温不同等值线明显向地势较高地区移动,喜温作物面积扩大;积温持续日数明显增加,有利于作物的成熟;≥0℃和≥10℃积温期间降水量主要在部分干旱地带增加,这有利于干旱地带农牧业生产和植被恢复。

The paper uses such indexes collected by 22 surface stations in Ningxia between 1961 and 2005 as daily temperature and precipitation, and calculated the accumulative temperature above 0℃ and 10℃ and the precipitation. The results show that, with global climate warming the accumulative temperature above 0℃ and 10℃ last 19 years remarkably increased in Ningxia, the isoline of the accumulative temperature above 10℃ moved remarkably toward south, so the warm-liking crops increased in planting area. The durative days of the accumulative temperature increased remarkably, which is beneficial to the growth of crops. The precipitation increased in some dry regions, which is also beneficial to agriculture and stockbreeding, and vegetation can come back.