24th Conference on Hurricanes and Tropical Meteorology

4B.4

Variability of Near-Equatorial Lower Tropospheric Flow Over the East Pacific Cold Tongue

Leslie M. Hartten, CIRES/Univ. of Colorado and NOAA/AL, Boulder, CO; and N. A. Bond and K. S. Gage

High-resolution UHF profiler observations of lower tropospheric winds at San Crist�bal in Ecuador's Gal�pagos Islands have been collected and analyzed. The dates for which data are available include much of the 1997-98 El Ni�o and the subsequent La Ni�a. A detailed picture of the lower troposphere's annual cycle over this portion of the East Pacific cold tongue and its interaction with the larger-scale ocean-atmosphere environment will be presented, together with a look at the dramatic changes in the flow over the cold tongue during the 97-98 warm event. The Gal�pagos profiler soundings will also be compared to numerous balloon soundings collected during ship transects along 95�W.

Session 4B, Interannual variations in the tropics (Parallel with Sessions 4A and J1)
Wednesday, 24 May 2000, 8:00 AM-9:30 AM

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