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Intensity variation and coherence of 3–6 day equatorial waves
Author(s) -
Dunkerton Timothy J.
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl01780
Subject(s) - zonal and meridional , longitude , stratosphere , climatology , atmospheric sciences , coherence (philosophical gambling strategy) , intensity (physics) , middle latitudes , latitude , amplitude , kelvin wave , geology , geodesy , physics , quantum mechanics
Meridional wind oscillations of 3–6 day period are common in the equatorial lower stratosphere. Upper air data obtained from 32 equatorial stations, 1973–87, show that 70 mb wave intensity over the Maritime continent varied annually with largest amplitude in NH late winter and spring, but the seasonal cycle of intensity was not uniform in the tropics. Time series of meridional velocity and its spatial coherence suggest that 70 mb wave packets were local in longitude and episodic in time.