根据读者要求,今年本刊将分期介绍一年中四个季度的主要灾害性天气和农事活动。现将一季度(1～3月)主要灾害性天气和农事简介如下。 灾害性天气。阳历1～2月份,历来是我省的严寒季节,主要灾害性天气是冰冻,其次是寒潮。冰冻天气一般于先年12月上中旬开始,到次年2月中下旬结束,但以1月中下旬最为严重。 According to the reader’s request, this year we will introduce in phases the major disastrous weather and agricultural activities in four quarters of the year. The first quarter (January to March) main disastrous weather and agricultural briefings are as follows. Severe weather. Gregorian calendar January to February, has always been the province’s cold season, the main catastrophic weather is frozen, followed by the cold wave. Frozen weather generally begins in mid-December of the first year of December and ends in mid-to-late February of the following year, but it is most severe in mid-to-late January.