阜阳市霜冻变化特征

为了有效防御和减轻霜冻灾害对阜阳市农业生产的影响，为合理开展农业气候区划提供可靠依据，利用阜阳市1953—2014年62年整编资料，采用气候统计学方法，对阜阳市霜冻气候特征及其变化进行分析。结果表明：（1）初霜冻主要集中在10 月下旬—11 月中旬，占总次数的90%，终霜冻主要集中在3月中旬—4 月上旬，占总次数的77%。（2）平均初霜冻日为11 月2 日、终霜冻日为3 月26 日，无霜冻期为222天。（3）终霜冻出现异常较初霜冻频率高，20世纪80年代后期以来初霜冻未出现异常偏早和偏晚，21世纪以来终霜冻异常增多。（4）初霜冻整体变化趋势不明显，未发生气候突变。终霜冻在20世纪60年代末期出现气候突变呈提前趋势。无霜期在20世纪80年代后期出现气候突变呈延长趋势。

Frost Variation Characteristics in Fuyang City

The paper aims to effectively prevent and mitigate the impact of frost disaster on agricultural production in Fuyang, and provide a reliable basis for reasonable development of agricultural climate regionalization. Using the processed data of 62 years from 1953 to 2014, the statistical characteristics of frost and its change in Fuyang were analyzed. The results show that: (1) the earliest frost mainly occurred from the late October to the middle of November, which accounted for 90% of the total, the last frost mainly occurred from the middle of March to the middle of April, which accounted for 77% of the total; (2) the average occurring time of the earliest frost was on Nov. 2, the average occurring time of the last frost was on Mar. 26, the frost-free period was 222 days; (3) the abnormal frequency of the last frost was higher than that of the earliest frost, the abnormal earliest frost never occurred from the late 1980’s, but the abnormal last frost occurred more in the 21st century; (4) the overall trend of the earliest frost was not obvious, and had no climate mutation, the last frost showed an abrupt change in the late 1960’s and an advanced trend since then, and the frost-free period had an abrupt change in the late of 1980’s and a prolonged tendency from that time.