摘要
通过对哈尔滨市1961-2010年初霜冻和终霜冻日期的气候特征分析,得出哈尔滨市初霜冻日期明显推迟,且推迟是一个突变现象,具体是从2002年开始;而终霜冻日期随气候变暖略有提前。初霜冻日期在不同年份分别存在准3 a和准30 a的振荡周期;终霜冻则存在准5 a和10-15 a的振荡周期。此外,初霜冻出现极早年,我国东北地区位势高度偏低,气温偏低;而初霜冻极晚年,我国华北及东北地区位势高度场较常年偏高,气温偏高。
Analyze the climatic characteristics of first frost and last frost date during 1961 to 2010, the results show that the first frosts delay and the last frosts advanced with the global warming. The first frosts have quasi oscillation periods of 3 years and 30 years, and oscillation periods of the last frosts are quasi 5 years and 10-15 years. Besides that, in the year of first frosts advanced, the geopotential height and temperature is lower in North- east China; on the contrary, the high geopotential height and temperature is higher in North and Northeast China.
出处
《黑龙江气象》
2014年第3期1-3,共3页
Heilongjiang Meteorology
关键词
哈尔滨
霜冻
气候特征
Harbin
frosts
climatic characteristics
