Cirene : air-sea iInteractions in the Seychelles-Chagos thermocline ridge region


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dc.contributor.author Vialard, J.
dc.contributor.author Duvel, J. P.
dc.contributor.author McPhaden, Michael J.
dc.contributor.author Bouruet-Aubertot, P.
dc.contributor.author Ward, Brian
dc.contributor.author Key, E.
dc.contributor.author Bourras, D.
dc.contributor.author Weller, Robert A.
dc.contributor.author Minnett, Peter
dc.contributor.author Weill, A.
dc.contributor.author Cassou, Christophe
dc.contributor.author Eymard, L.
dc.contributor.author Fristedt, T.
dc.contributor.author Basdevant, C.
dc.contributor.author Dandonneau, Y.
dc.contributor.author Duteil, O.
dc.contributor.author Izumo, T.
dc.contributor.author de Boyer Montegut, C.
dc.contributor.author Masson, S.
dc.contributor.author Marsac, F.
dc.contributor.author Menkes, C.
dc.contributor.author Kennan, S.
dc.date.accessioned 2010-10-27T15:24:43Z
dc.date.available 2010-10-27T15:24:43Z
dc.date.issued 2009-01
dc.identifier.citation Bulletin of the American Meteorological Society 90 (2009): 1337-1350 en_US
dc.identifier.uri http://hdl.handle.net/1912/4014
dc.description Author Posting. © American Meteorological Society, 2009. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Bulletin of the American Meteorological Society 90 (2009): 1337-1350, doi:10.1175/2008BAMS2499.1. en_US
dc.description.abstract The Vasco—Cirene program ex-plores how strong air—sea inter-actions promoted by the shallow thermocline and high sea surface temperature in the Seychelles—Chagos thermocline ridge results in marked variability at synoptic, intraseasonal, and interannual time scales. The Cirene oceano-graphic cruise collected oceanic, atmospheric, and air—sea flux observations in this region in Jan-uary—February 2007. The contem-poraneous Vasco field experiment complemented these measure-ments with balloon deployments from the Seychelles. Cirene also contributed to the development of the Indian Ocean observing system via deployment of a moor-ing and 12 Argo profilers. Unusual conditions prevailed in the Indian Ocean during Janu-ary and February 2007, following the Indian Ocean dipole climate anomaly of late 2006. Cirene measurements show that the Seychelles—Chagos thermocline ridge had higher-than-usual heat content with subsurface anomalies up to 7°C. The ocean surface was warmer and fresher than average, and unusual eastward currents prevailed down to 800 m. These anomalous conditions had a major impact on tuna fishing in early 2007. Our dataset also sampled the genesis and maturation of Tropical Cyclone Dora, including high surface temperatures and a strong diurnal cycle before the cyclone, followed by a 1.5°C cool-ing over 10 days. Balloonborne instruments sampled the surface and boundary layer dynamics of Dora. We observed small-scale structures like dry-air layers in the atmosphere and diurnal warm layers in the near-surface ocean. The Cirene data will quantify the impact of these finescale features on the upper-ocean heat budget and atmospheric deep convection. en_US
dc.description.sponsorship CNES funded the Vasco part of the experiment; INSU funded the Cirene part. R/V Suroît is an Ifremer ship. The contributions from ODU, WHOI, and FOI (Sweden) are supported by the National Science Foundation under Grant Number 0525657. The participation of the University of Miami group was funded though NASA (NNG04HZ33C). PMEL participation was supported through NOAA’s Office of Climate Observation. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Meteorological Society en_US
dc.relation.uri http://dx.doi.org/10.1175/2008BAMS2499.1
dc.title Cirene : air-sea iInteractions in the Seychelles-Chagos thermocline ridge region en_US
dc.type Article en_US
dc.identifier.doi 10.1175/2008BAMS2499.1

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