Atmospheric teleconnections and regional-scale atmospheric anomalies over the Northern Hemisphere

作者：Qian Wei Hong^*; Liang Hao Yuan

来源：Chinese Journal of Geophysics, 2012, 55(5): 1449-1461.

DOI：10.6038/j.issn.0001-5733.2012.05.003

• Atmospheric teleconnections
• Physical decomposition
• Arctic Oscillation
• North Atlantic Oscillation
• Pacific-North American teleconnection pattern

Atmospheric teleconnections in the Northern Hemisphere such as Arctic Oscillation (AO), North Atlantic Oscillation (NAO) and Pacific-North American (PNA) teleconnection can be explained by the physical decomposition of geopotential height. The result shows that the AO reflects planetary-scale zonal-mean anomalies in the Arctic region; the PNA results from persistent regional-scale atmospheric anomalies; NAO is a combined result of both planetary-scale zonal-mean and regional-scale anomalies. The rotated empirical orthogonal REOF) of planetary-scale zonal-mean and regional-scale anomalies not only confirms the already known regional oscillations and wave trains, but also discovers new patterns, such as "twin dipole oscillations" in the Arctic region, Euro-Asia Oscillation (EAO) and Atlantic-Euro-Asia (AEA) wave-train pattern. These oscillations or wave trains are linked to adjacent regional weather anomalies and climate anomalies.

• 出版日期2012-5
• 单位北京大学