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Modelling of Advective Transport and Biogeochemistry at a Shallow Hydrothermal Vent System
Date
2017-08-18
Author
Bartlett, Stuart
Giovannelli, Donato
YÜCEL, MUSTAFA
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Inthisworkwepresentthefirstinaseriesofmodelresultsaimedatelucidatingthecomplexcouplingsbetweenfluidflow,heattransport,advectivetransportofsolutes,andmicrobialmatgrowthatashallowhydrothermalvent.WeareprimarilyinterestedintheventsystemsofMilos,Greece,wherebiofilmcommunitiesarespatiallysegregatedintodistinctdomains,eachwithaverydifferentspeciescomposition[1].Thelocationsofthesedomainsvarystronglywiththesandbedtopography.Inparticular,therearesharpspeciescompositiondifferencesbetweenthewindwardsideand the leeward side of the seafloor ripples. Thedeliveryofnutrientsandremovalofwasteproductsisclearlyafundamentalconstraintonthelocationofthevariousnichesforthesemicroorganisms.Thistransportofdissolvedchemicalspeciesiscontrolledbythephysicalpropertiesoftheseawaterandtheflowoffluidovertheripplesattheseafloor.Sincethisisahydrothermalregion,thefluidflowneartheseafloorcanbestronglyinfluencedbyrisingwarmfluidpercolatingthroughthesandfrombelow(combinedwiththetidalandwind-drivenmeanflowsabove).Thishydrothermalfluidcarriesitsownuniquesetofdissolved chemical species.Totrytouncovertherelationshipsbetweenthegrowthofthevariousmicroorganismsandthephysicochemicaldynamicsofthesesystems,weembarkedonanumericalmodellingeffort,makinguseoftheLatticeBoltzmannMethodtosimulatefluidflowandtheadvectionanddiffusionofheatandpassivescalars.Inthiswork,wepresenttheinitialresultsofoursimulations,showinghowdifferentfluiddynamicalboundaryconditionscontrolthesteadystatedistributionofchemicalspeciesandtemperatures throughout the vent system.
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https://hdl.handle.net/11511/72060
https://goldschmidtabstracts.info/2017/249.pdf
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Graduate School of Marine Sciences, Conference / Seminar
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S. Bartlett, D. Giovannelli, and M. YÜCEL, “Modelling of Advective Transport and Biogeochemistry at a Shallow Hydrothermal Vent System,” presented at the Goldschmidt Conference (13 - 18 Ağustos 2017), Paris, France, 2017, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/72060.