北极涛动对我国冬季气温的影响
Influence of Arctic Oscillation on Winter Temperature in China
摘要:
利用NCEP/NCAR再分析资料，采用相关、合成等方法分析了1969~2009年我国冬季气温的时空分布特征以及与北极涛动的关系。结果表明：冬季北极涛动与我国冬季气温间存在显著正相关关系，但其相关关系存在较大的区域差异，具体表现为中高纬地区相关关系较好，而与中低纬和青藏高原地区相关关系较为不稳定。因此，北极涛动异常可通过影响中高纬地区大气环流导致我国冬季气温产生异常。
Abstract:
Based on NCEP/NCAR reanalysis data, correlation and composite methods were used to analyze the spatial and temporal distribution characteristics of winter temperatures in China and the re-lationship between them and the Arctic Oscillation (AO) from 1969 to 2009. The results show that there is a significantly positive correlation between the winter oscillation and the winter temper-ature in China, but there is a large regional difference in the correlation, which is reflected in the good correlation between the middle and high latitudes and the unstable correlation between the middle and low latitudes and the Qinghai-Tibet plateau. Therefore, the anomaly of AO can cause the anomalous winter temperature in China by affecting the atmospheric circulation in the middle and high latitudes.
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