摘要
Abstract
Using monthly average ground temperature of 0-20 cm layer in Weihui City during 1961-2012,adopting climate tendency rate,accumulative anomaly,noise-signal ratio,the variation trend of shallow ground temperature,abrupt climate change and abnormal year of Weihui City in recent 52 years were studied.The results showed that annual average shallow ground temperature indicate extremely significant rising trend except for the surface,increasing 0.07-0.18 ℃/10a,maximum in 15 cm.Winter and spring showed extremely significant rising trend,especially in 15-20 cm,increasing 0.17-0.34 ℃/10a,the rising trend of summer and autumn is not obvious.The abrupt change of shallow ground temperature in winter and spring and annual average is in 1976,1986,early period of 1990' s respectively.Abnormal high annual average ground temperature are mostly occurred in 1990s',abnormal low in 1960s' and 21st century.Temperature rising and precipitation reducing are main reasons for ground temperature rising.关键词
浅层地温/气候倾向率/气候突变/异常年份/卫辉市Key words
Shallow ground temperature/ Climate tendency rate/ Abrupt climate change/ Abnormal year/ Weihui City分类
农业科技
