气候变暖背景下沙坡头区霜冻变化特征  

Change Characteristics of frost in Shapotou District under the Background of Climate Warming

作　　者：高杰 杨苑 庞婷婷 张德有 

机构地区：[1]宁夏中卫市气象局,宁夏中卫755000 [2]宁夏中卫市沙坡头区气象局,宁夏中卫755000

出　　处：《安徽农业科学》2017年第13期186-188,共3页Journal of Anhui Agricultural Sciences

摘　　要：利用1961—2015年中卫市沙坡头区国家气候基本站的逐日平均气温及地面最低气温资料,采用线性倾向估计等方法研究了近55年沙坡头区气温及霜冻的变化特征。结果表明,近55年来沙坡头区年平均气温在波动中不断上升,尤其21世纪初气候变暖明显,在此背景下,沙坡头区初霜冻日呈推后趋势,终霜冻日呈提前趋势,无霜期呈延长趋势;进入21世纪,初霜冻日平均推后4~5 d,终霜冻日平均提前15 d左右,无霜期明显增加,尤其在近5年平均延长了31 d,特早终霜冻日和特长无霜期也均出现在21世纪。Using the daily average temperature and ground minimum temperature data of the national climate base station in Shapotou District of Zhongwei City from 1961 to 2015, the change characteristics of temperature and frost in Shapotou District were studied by linear propensity estimation method. The results showed that the annual average temperature in Shapotou District had been increasing in the past 55 years, especially in the beginning of the 21st century. On this background,the first frost day in Shapotou District was pushed forward, and the final frost day was in advance, and the frost-free period was prolonged. In the 21 ~＇ century, the average first frost day pushed 4 -5 days, the average final frost day was about 15 days in advance, and the frost-free period was obviously increased, especially in the past 5 years, an average of 31 days extended, special early final frost day and specialty frost-free period also appeared in the 21 st century.

关 键 词：初霜冻 终霜冻 无霜冻期 变化特征 沙坡头区 

分 类 号：S425[农业科学—植物保护]