陕西关中西部近50年无霜期气候特征分析  

Climate Characteristics of Frost-Free Period: In Recent 50 Years in Western Guanzhong

作　　者：王春娟 

机构地区：[1]凤翔县气象局,陕西凤翔721400

出　　处：《中国农学通报》2016年第35期166-170,共5页Chinese Agricultural Science Bulletin

基　　金：陕西省气象局科技创新基金项目"宝鸡主要农作物对气候变化的响应研究"(2013M-12)

摘　　要：为了研究气候变化背景下陕西关中西部无霜期变化特征及其影响,选取宝鸡市11个气象站1961—2010年气温、初(终)霜日等观测资料,应用气候变化理论统计分析。结果表明:近50年来,宝鸡市平均初霜日以1.77 d/10 a倾向率延后,而终霜日以1.72 d/10 a的倾向率提前,影响无霜期以3.11 d/10 a的倾向率显著延长。初霜日在1974年,终霜日和无霜期在1982年分别发生了明显的转折。研究结果显示无霜期延长对农业生产有积极作用。The paper aims to study the change laws of frost- free period and its influence in westernGuanzhong, Shaanxi Province, under the background of climate change. The author chose the temperature andthe first（last） frost day data of 11 meteorological stations in Baoji from 1961 to 2010, and used climate changetheory to conduct statistical analysis. The results showed that： in recent 50 years, the first frost day was delayedwith a tendency rate of 1.77 d/10 a on average in Baoji, and the last frost day advanced with a tendency rate of1.72 d/10 a, which made the frost-free period significantly extend with a tendency rate of 3.11 d/10 a. The firstfrost day, the last frost day, and frost-free period had a turning point in 1974, 1982, 1982, respectively. Theextension of frost-free period had positive effects on agricultural production.

关 键 词：变化特征 初(终)霜日 无霜期 关中西部 

分 类 号：P423.4[天文地球—大气科学及气象学]