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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, FP
This 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 Oceanography

Volume

58

Issue

3-4

Pagination

284-295

ISSN

0967-0645

Department/School

Institute for Marine and Antarctic Studies

Publisher

Pergamon-Elsevier Science Ltd

Place of publication

The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1Gb

Rights statement

The definitive version is available at http://www.sciencedirect.com

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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    University Of Tasmania

    Categories

    Keywords

    biological oceanography

    Licence

    In Copyright

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