The relationship between the North Atlantic Oscillation and El Niño-Southern Oscillation.Geophys

• Main Authors: Jianping Huang, Kaz Higuchi, Amir Shabbar
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1998
• Subjects: Pacific; North Atlantic; North Atlantic oscillation
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.667.2272; http://hjp.lzu.edu.cn/KeyPublications/Huang-GRL-1998.pdf

Abstract. We have applied a multiresolution cross-spectral analysis technique to resolve the temporal re-lationship between the NAO and ENSO. The study shows significant coherence between NAO and Nifio3 SST in about 70 % of the warm ENSO events from 1900 to 1995, of which 33 % and 37 % are associated with a 5- to 6-year period (El) and a 2- to 4-year period (E2) oscillation terms in the spectral decomposition, respec-tively. The dominant teleconnection pattern associated with changes in the mean atmospheric irculation dur-ing the initial winter of a typical E1 and E2 events is the positive phase of the Pacific/North American (PNA) pattern. Non-coherence between the NAO and ENSO occurs during relatively weak Nifio3 SST anomaly, with a teleconnection pattern which shows a strong negative phase of the NAO and a pattern which resembles a weak eastward shifted negative phase of the PNA pattern. 1.