The Spatial and Temporal Characteristics of Winter Snowfall in Northeast China and Its Relation with Global Sea Surface Temperature Anomaly
The Spatial and Temporal Characteristics of Winter Snowfall in Northeast China and Its Relation with Global Sea Surface Temperature Anomaly
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发表时间：
2012
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通讯作者：
L. Duo
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作者：
L. Duo
利用1961-2008年中国气象站观测资料和全球1°×1°海表温度（SST）资料，采用主成分分析、小波分析和相关分析等方法，分析了东北地区冬季降雪的时空特征及其与全球SST的相关性。高频振荡周期（2- 3 a和7-8 a）和准十年尺度（16 a）的低-东北地区近48年来冬季降雪量总体上呈增加趋势，但东北地区冬季降雪量总体上呈增加趋势，45°N以北地区冬季降雪量显著增加，而45°N以南地区冬季降雪量变化不显著。分析表明，北大西洋30° ~ 50 ° N、10 ° ~ 40 ° W海温与第1/2时间系数呈显著正相关，研究区北方冬季降雪量与全球海温的相关性不明显，但研究区南方冬季降雪量与全球海温的相关性不明显，SST的增暖可能导致研究区北方冬季降雪量显著增加。
Based on the observational data in the period 1961-2008 from China weather stations and the 1°×1°global sea surface temperature(SST) data,the spatial and temporal characteristics of winter snowfall in Northeast China and the correlation with global SST are explored by using principal component analysis, wavelet analysis and correlation analysis.The study found that:the high frequency oscillation periods(2- 3 a and 7-8 a) and a quasi-decadal scale(16 a) of the low-frequency oscillation were always existing during the past 48 years.Winter snowfall revealed an increasing trend in the past 48 years as a whole in Northeast region.However,the winter snowfall in the area north of 45°N increased significantly,while it did not change significantly in the area south of 45°N.Analysis has shown that a significantly positive correlation exists between SST in the North Atlantic 30°-50°N,10°-40°W and the lst/2nd time coefficient, and also between the winter snowfall in the northern part of the study area and SST,but the correlation between winter snowfall in the south region and the global SST is not obvious.The warming of SST may lead to a significant increase in snowfall in the northern part of the study area.