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Tropical Pacific Drifting Buoys

Rick Lumpkin / Mayra Pazos, AOML, Miami

JULY 2019

During July 2019, 276 satellite-tracked surface drifting buoys were reporting from the tropical Pacific. Strong anomalies in the eastern near-equatorial Pacific were likely associated with Tropical Instability Waves. Elsewhere, the drifter array indicated that large-scale currents were close to their climatological July strengths across the basin.

FIGURE A1.1 a) Top: Movements of drifting buoys in the tropical Pacific Ocean. The linear segments of each trajectory represent a one week displacement. Trajectories of buoys which have lost their subsurface drogues are gray; those with drogues are blue. b) Middle: Monthly mean currents calculated from all buoys 1993-2010 (gray), and currents measured by the drogued buoys this month (black) smoothed by an optimal filter. c) Bottom: Anomalies from the climatological monthly mean currents for this month.


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