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The impact of equatorial Pacific tropical instability waves on hydrography and nutrients: 2004-2005
journal contribution
posted on 2023-05-17, 10:39 authored by Peter StruttonPeter Strutton, Palacz, AP, Dugdale, RC, Chai, F, Marchi, A, Parker, AE, Hogue, V, Wilkerson, FPThis paperdocumentsthevariabilityinphysicsandnutrientsduringtwocruisesspanning1101W to 1401W inDecember2004andSeptember2005.Thegoalofthisworkistosetthehydrographic frameworkforcompanionpaperswhichquantifytheroleofiron,siliconandgrazinginmaintainingthe high nitrate,lowchlorophyll(HNLC)conditionsintheequatorialPacific.Thetwocruiseswere conductedalmostayearapart,atdifferentphasesoftheElNin˜o cycle,butduringsimilarlyintense tropicalinstabilitywave(TIW)seasons.Thehigherphytoplanktonbiomassobservedonthe2005cruise was duetoacombinationoftimeofyearandaweakeningElNin˜ o. AgeneralrelationshipbetweenTIWs and Sicyclingisdescribed.TIWsadvecttheequatorialupwellingplumealternatelytothenorthand south, andalsogeneratelocalizedenhancedupwelling.Thedistortedupwellingplumeisaregion of enhancedbiogenicsilicaproductionandexport.Awayfromregionsofactiveupwelling, Si remineralizationisenhancedandexportissignificantlyreducedorabsent.
History
Publication title
Deep-Sea Research. Part 2: Topical Studies in OceanographyVolume
58Issue
3-4Pagination
284-295ISSN
0967-0645Department/School
Institute for Marine and Antarctic StudiesPublisher
Pergamon-Elsevier Science LtdPlace of publication
The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1GbRights statement
The definitive version is available at http://www.sciencedirect.comRepository Status
- Restricted