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gfdl's external home page > gfdl on-line bibliography > 1997: Journal of Geophysical Research, 102(D12), 13,457-13,464

Observation of an ultraslow large-scale wave near the tropical tropopause

Hamilton, K., 1997: Observation of an ultraslow large-scale wave near the tropical tropopause. Journal of Geophysical Research, 102(D12), 13,457-13,464.
Abstract: An analysis is made of very high resolution radiosonde data taken at seven western Pacific island stations during TOGA-COARE (Tropical Ocean-Global Atmosphere and Coupled Ocean-Atmosphere Response Experiment). Evidence is found for a wave near the tropopause with periods ~30-40 days and with very slow (~3 m s-1) eastward propagation. This oscillation appears quite coherent across the region considered (a 37 degrees longitude spread). The oscillation has a short vertical wavelength (~3 km) and is strongly attenuated above the tropopause and thus would be very hard to observe in either satellite data or conventional meteorological analyses.
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last modified: March 23 2004.