Characterizing Climate and Human Influences on Coastal Margin … · 2017. 7. 10. · •...
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Characterizing Climate and Human Influences on Coastal Margin Carbon Dynamics Using Integrated Land - Ocean Modeling Approaches Steven Lohrenz (U. Mass Dartmouth) Wei-Jun Cai (U. Delaware) Hanqin Tian (Auburn) Ruoying He (N. Carolina State U.) Zuo “George” Xue (Louisiana State U.) Katja Fennel (Dalhousie) OCB Workshop - 2017 Acknowledgements: NASA, NSF, NOAA, USGS, EPA
Transcript of Characterizing Climate and Human Influences on Coastal Margin … · 2017. 7. 10. · •...
CharacterizingClimateandHumanInfluencesonCoastalMarginCarbonDynamicsUsingIntegratedLand-Ocean
ModelingApproaches
StevenLohrenz(U.MassDartmouth)Wei-JunCai(U.Delaware)HanqinTian(Auburn)
RuoyingHe(N.CarolinaStateU.)Zuo“George”Xue(LouisianaStateU.)
Katja Fennel(Dalhousie)
OCBWorkshop- 2017Acknowledgements:NASA,NSF,NOAA,USGS,EPA
Approach: Coupled Terrestrial-Ocean Models
DynamicLandEcosystemModel(v2.0)usedtoestimatespatialandtemporalpatternsofland-aircarbonfluxesandlateraltransportofwater,carbon,andnitrogen
DLEMterrestrialoutputslinkedtoaphysical-biogeochemicalmodel(SABGOM)tocharacterizecoastalcarbonfluxesandecosystemdynamics
Modelingeffortssupportedbyfieldsurvey-basedandsatellite-basedobservationsofcarbonfluxesandotherbiogeochemicalprocesses
Tianetal.,2010a,b;Tianetal.,2011;Tianetal.,2012;Zhangetal.,2012;Taoetal.,2014;Renetal.,2015;Tianetal.,2015
Hoffmanetal.,Ann.Rev.,2011;Fenneletal.,2011,2013
HyunandHe(2010);Xueetal.,2013,2016
DynamicLandEcosystemModelResults
CarbonLeachingPatterns -Spatialdistributionofyearlytotalorganiccarbon(TOC)anddissolvedinorganiccarbonleachingintheMARBaveragedduring2001-2010(Tianetal.,GBC,2015)
IncreasingRiverDischarge - ProjectedMississippiriverdischargeoverthe21stcenturyanditsenvironmentalcontrolsunderhighemissionscenario(A2)(Taoetal.,GRL,2014)
IncreasingTrendinDIC- Annualchangesinexportofdissolvedinorganiccarbon(DIC,Tg Cyr1)fromtheMississippiRiverbasintotheGulfofMexicooverthe21stcentury (Renetal.,JGR-B,2015)
CoupledModelSimulations:1904-1910vs.2004-2010• IncreaseinDLEM-simulatedDINexportfrom
MARBfrom1904-1910comparedto2004-2010• Significantincreaseinsimulatedoceanprimary
production,anddecreaseinpCO2 asaresultofincreasedriverinputs
• Oceanmodelalsoprovidesestimateofalong- andcross-shelftransportofdissolvedinorganicnitrogenforthe2004-2010period
Xueetal.,2013,2016
Summary:UnderstandingClimateandHumanImpactsonTerrestrial-CoastalFluxes
• Integratedmodelingapproachescanbeusefulinunderstandinghowclimateandweather-relatedforcinginconjunctionwithchanginghumanactivitycanalterthetransferofwater,carbonandnutrientsthroughvariousterrestrialreservoirsintorivers,estuaries,andcoastaloceanwaters
• Coastalmarginsmaybeparticularlysensitivetosuchchanges,whichcanalterbiogeochemistryofthecoastaloceanandhaveimplicationsforcarbonsequestration,eutrophication,hypoxia,andoceanacidification
• Modelproductscanprovidedecisionsupportforcarbonmanagement,waterquality,andecosystemsustainability
