Influence of ENSO event on the maintenance of Pacific storm track in the Northern winter

An influence of ENSO event on the maintenance of Pacific storm track in the Northern winter is studied based on the NCEP/NCAR daily re-analysis data. The result shows that in El Nino (La Nina) year an increase (decrease) of b aroclinicity over the storm track, extension (withdrawal) eastward and sout hward (westward but northward for its east end) of its position and augment ation (debilitation) of its strength are closely in response to the enhance ment (abatement) of eddy heat flux and momentum flux that are associated wi th the development of the storm track. It thus indicates that ENSO event ex erts an important impact on its maintenance and development in the Pacific Ocean.