Equatorial Zonal Circulations from the NCEP-NCAR Reanalysis

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概要

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• The NCEP-NCAR 1958-97 upper-air dataset has been evaluated for evidence of equatorial zonal circulation cells around the globe. For this it is essential not only to isolate the divergent part of the wind but also to ascertain the continuity following the flow between the centers of upward and downward motion. Over the eastern to central Pacific a well developed cell persists all year round, with subsidence in the East, but with the compensating divergent westward flow concentrated in the realm of a midtropospheric jet rather than at the surface. A cell over the western Atlantic in January is characterized by subsidence in the East and divergent westerly flow at the surface. In the Indian Ocean sector during July, a small cell is recognized over the western part of the basin, contained in the upper-to mid-troposphere and with subsidence over the East African coast. In October a well developed cell spans the entire basin, with subsidence over the East African coast and eastward flow in the lower tropophere.

• 社団法人日本気象学会の論文
• 2001-04-25

著者

• Hastenrath Stefan

  Department of Atmospheric and Oceanic Sciences University of Wisconsin

関連論文

• 南方振動に関与する熱帯太平洋とAustralasia域における循環場と気候要素
• 東太平洋における赤道対流圏中層の東風ジェット
• Equatorial Zonal Circulations from the NCEP-NCAR Reanalysis
• Annual Cycle of Equatorial Zonal Circulations from the ECMWF Reanalysis
• Comments on "Influence of the Indian Ocean dipole on the Southern Oscillation" by S.K. BEHERA et al. (J. Meteor. Soc. Japan, Vol. 81, 169-177)

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