58年华北地区初、 终霜日及无霜期变化特征分析
焦文慧,张勃,马彬,崔艳强,邢立亭,王晓丹,黄浩

Variation Characteristics of the Date of First Frost and Last Frost and the Frost-Free Period in North China in Recent 58 Years
Wenhui JIAO,Bo ZHANG,Bin MA,Yanqiang CUI,Liting XING,Xiaodan WANG,Hao HUANG
表3 1961 -2018年华北地区及各区域初、 终霜日和无霜期突变
Table 3 The mutation time of the first frost date, the last frost date and frost-free period in North China and the three sub-regions during 1961 -2018
区域初霜日期终霜日期无霜期
突变年前(月-日)后(月-日)突变年前(月-日)后(月-日)突变年前/天后/天
华北地区198610-0610-11199504-2504-171995164176
京津冀地区198610-2110-26198704-0904-011986193206
山西省199710-1310-19199604-1904-101996176190
内蒙古自治区198409-2209-28199605-1005-011983133147