Update on Deep Ocean EOVs: Biogeochemistry. Felix Janssen Alfred Wegener Institute, Bremerhaven, Germany
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1 Update on Deep Ocean EOVs: Biogeochemistry Felix Janssen Alfred Wegener Institute, Bremerhaven, Germany OOI Deep Ocean Observing Workshop, August 2018
2 DOOS BGC EOV update Identify & specify deep-ocean biogeochemistry EOVs needed to address scientific and societal needs
3 Deep ocean BGC observation needs and EOVs How much organic matter Particulate is exported Vertical organic to the Dissolved deep organic ocean matter and how fluxes! organic much is matter recycled at depth?
4 Deep ocean BGC observation needs and EOVs How much organic matter seafloor arrives labile detritus at the supply seafloor seafloor & and organic how matter remineralization! much is remineralized respiration & buried in the sediment?
5 Deep ocean BGC observation needs and EOVs How fast are solutes Deep ocean transported Transient and mixed in the transport and deep ocean, Tracers what are typical mixing rates! residence times?
6 Deep ocean BGC observation needs and EOVs How much inorganic (esp. anthropogenic) carbon is Inorganic Deep carbon/ ocean inorganic Stable carbon stored in the deep ocean, and carbonate carbon system inventory! isotopes what is the impact on deep ocean chemistry (OA)?
7 Deep ocean BGC observation needs and EOVs How much nutrients are Deep ocean nutrient available Nutrients to sustain ocean inventory! productivity?
8 Deep ocean BGC observation needs and EOVs Is oxygen Deep decline threatening Oxygen ocean the oxygenation! deep ocean?
9 Deep ocean BGC observation needs and EOVs How much does the Deep ocean greenhouse deep Nitrous ocean contribute oxide to gas budget! greenhouse gas emissions? seafloor methane efflux
10 Current list of GOOS & DOOS BGC EOVs EOV DOOS experts Inorganic C / carbonate system Christopher L. Sabine, Peter Brown 13 C inorganic carbon Christopher L. Sabine, Peter Brown Inorganic macro nutrients Dissolved oxygen Dissolved organic matter Particulate (organic) matter Nitrous oxide Transient tracers Respiration rates Seafloor labile organic matter Seafloor methane efflux Ocean Color Sinhue Torres Valdes Clare Reimers, Rick Wanninkhof, Sinhue Torres Valdes Thorsten Dittmar Ian Salter Hermann W. Bange Marie-Jose Messias, Peter Brown, Toste Tanhua Clare Reimers, Frank Wenzhöfer, Henry DOOS Ruhl, and Thomas GOOS Soltwedel Matthias DOOS only Haeckel GOOS only
11 Multidisciplinary approach to EOVs
12 Example Biological Pump Physics EOVs: stratification, advection, mixing, residence time Biogeochemical EOVs: Organic matter export & remineralization Biology/Ecosystem EOVs: OM consumption, sustaining productivity & biodiversity Subsurface temperature Subsurface salinity Subsurface currents Turbulence Particulate organic matter Dissolved organic matter seafloor labile organic matter seafloor respiration Zooplankton biomass & diversity specific biomass and density microbial biomass & diversity benthic invertebrate abundance & distrib.
13 DOOS BGC EOV revision Tasks Identify missing BGC EOVs, draft spec sheets Revise representation of deep-ocean specificities in GOOS EOV spec. sheets (e.g., phenomena, scales, observation networks) Feedback to GOOS BGC panel & issue DOOS EOVs Dissemination of outcomes (e.g., DOOS SIG, OceanObs 19) Status First DOOS spec sheets drafted Deep ocean experts gathered in DOOS BGC EOV task team Guiding experts Preparing and guiding EOV revision process Consulting experts Revising GOOS and DOOS spec sheets
14 Current list of GOOS & DOOS BGC EOVs EOV DOOS experts Inorganic C / carbonate system Christopher L. Sabine, Peter Brown 13 C inorganic carbon Christopher L. Sabine, Peter Brown Inorganic macro nutrients Dissolved oxygen Dissolved organic matter Particulate (organic) matter Nitrous oxide Transient tracers Respiration rates Seafloor labile organic matter Seafloor methane efflux Ocean Color Sinhue Torres Valdes Clare Reimers, Rick Wanninkhof, Sinhue Torres Valdes Thorsten Dittmar Ian Salter Hermann W. Bange Marie-Jose Messias, Peter Brown, Toste Tanhua Clare Reimers, Frank Wenzhöfer, Henry Ruhl, Thomas Soltwedel Matthias Haeckel
15 Thank you! OOI Deep Ocean Observing Workshop, August 2018
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