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The P/ACE Advantage

The P/ACE Advantage. Plankton Size/Functional Type/Community Structure Direct link to BGC models, biomass/rate partitioning, Use hyperspectral observations of R rs ( λ ) (incl. near-UV) Advanced Atmosphere Correction Absorbing aerosols (a HUGE problem in the coastal ocean!!)

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The P/ACE Advantage

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  1. The P/ACE Advantage • Plankton Size/Functional Type/Community Structure • Direct link to BGC models, biomass/rate partitioning, • Use hyperspectral observations of Rrs(λ) (incl. near-UV) • Advanced Atmosphere Correction • Absorbing aerosols (a HUGE problem in the coastal ocean!!) • Use 345 nm as dark pixel bridging aerosol corrections to the NIR • CDOM Separation • CDOM is the dominant optical property affecting ocean color and it contaminates ecosystem/BGC retrievals • Bands at 360 and 380 nm will allow robust CDOM retrievals • Chlorophyll Fluorescence • Physiological health using fluorescence emission spectra

  2. Essential OPCC Variables (1) • PFT/PSD (biomass partitioning, size, function, …) • HPLC analyses, cell counts, flow cyto/cams, etc. • NPP (biomass partitioned) • 14C/13C, GPP-RA, μPhytoC, etc. • NCP (export potential) • ΔO2/Ar, PS vs. RT, Δ(something)/Δt, gas tension, new production (15N), NPP-RH, etc. • Export & Flux Attenuation • Sediment traps, radioisotopes (234Th), AOUR, mass balances, camera, PFTs, pumps, etc.

  3. Essential OPCC Variables (2) • Surface pCO2 and pH – Rik/Steve/Joe • Direct observation • Air-Sea CO2 and O2fluxes – Joe/ • ΔpCO2/ΔO2 + wind + solubility model, atmosphere/ocean inversions • Calcification • 14C (microdiffusion), ΔPIC/Δt, ΔTAlk/ΔDIC, • N2 fixation • 15N2 incorporation, acetylene reduciton, Zehr…

  4. Assumptions • Supporting measurements / modling infrastructure • MLD, SST, winds, SSH, salinity, horizontal currents, model assessment of vertical water mass exchanges in the upper 500 m, etc. • Need Physical/BGC assimilative capabilities to use ACE obs to get at OPCC essential variables • Need to push the physicists to get what we need (OCB Clivar)

  5. Field / Modeling Studies Needed to Develop Robust “Paths” • Intercomparisonof NPP, NCP, GPP, export, Ri, etc. rate measurements and in a Lagrangian frame assessing DelSomething/Dt Q = How is the biological pump changing? Q = What are the interactions among GPP, NPP, NCP and export across a diversity of time evolving ecosystems? • ACE mission support • Interagency Carbon Cycle Working Group… • PFT intercomparison exercise • HPLC, cell counts, cameras, spectroscopy, backscatter, • Provide PFTs in form to be used by modelers • System simulation experiments – comparing sateliite/in situ data uncertainties propagate to OPCC variables • Long line process observation of appropriate variables • Clivar, AMT and other opportunities • Airborne Lidarintercomparison work

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