Modelling of Advective Transport and Biogeochemistry at a Shallow Hydrothermal Vent System

2017-08-18
Bartlett, Stuart
Giovannelli, Donato
YÜCEL, MUSTAFA
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.
Citation Formats
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.