1961—2010年辽宁省初霜日期变化规律及特征研究

Research on Change Rules and Characteristics of First Frost Date in Liaoning Province from 1961 to 2010

利用1961—2010年辽宁省52个代表站逐日地面气温资料,采用周期分析、趋势分析等方法,揭示气候变化的背景下,辽宁省初霜日期的周期性、趋势性、突变性等特征。结果表明:辽宁省平均初霜日期地域性明显,大部分初霜日期是在10月的第2候,北部和西部地区出现较早,大连地区出现较晚。初霜日期出现最早的是朝阳地区的建平站,日期为9月18日,出现最晚的是大连地区的长海站,平均出现日期是10月29日。辽宁省初霜日期呈现显著的推迟趋势。

The period,tendency and abruption of the first frost date in Liaoning Province had been revealed using the daily temperature data of 52 stations from 1961 to 2010 under the background of climate change.The results showed that the average first frost date in Liaoning Province showed a significant regional characteristics.Most of the first frost date appeared in the second Hou of October,northern and western regions appeared earlier,later in Dalian.The earliest first frost date appeared in Jianping station of Chaoyang,which was in September 18.The latest first frost date appeared in Changhai station of Dalian,which was in October 29.The first frost date in Liaoning Province showed a postponed tendency.