ameriflux and fluxnet report dennis baldocchi bev law asiaflux workshop, 2008, seoul, korea

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AmeriFlux and FLUXNET Report Dennis Baldocchi Bev Law AsiaFlux Workshop, 2008, Seoul, Korea

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Fluxnet Report

AmeriFlux and FLUXNET ReportDennis BaldocchiBev Law

AsiaFlux Workshop, 2008, Seoul, KoreaAmeriFlux Data Archive & NetworkOne of the basic requirements for participation in the AmeriFlux network is to submit or make data available, within one year of collection, to the AmeriFlux data archive at the Carbon Dioxide Information Analysis Center (CDIAC).

131 AmeriFlux sites92 active sites39 inactive sites

Data received from 105 sites

Over 550 site-years of data received to date

http://public.ornl.gov/ameriflux/2Presentation_nameLength of Operation for Active Sites (92)

12 new sites began in 2007Mean operating age 5.7 yrs10 sites operating over a decade but several have uncertain future funding# of years operating3New Sites Marcy Litvak (6), Tilden Meyers urban/SD, 2 everglades, Russ Scott southern Az., Tim Grifis KCMP, Bev Marys River

10+ Sites Sky Oaks (old & young), Barrow, Niwot Ridge, Mize, Bondville, Harvard, Howland, Duke (loblolly), WLEF/Park FallsIntegrating ecosystem studies and modelingLong-term flux observations, biological/ancillary dataExperimental manipulationsCO2 x warming x nutrientsCoupling of plant-microbial processesDisturbance effectsWildfire emissions, C transformations, ecosystem recoveryDrought effectsLand-use changeEddy covariance flux tower(courtesy Dennis Baldocchi)

ObservationsExperimental ManipulationSoil warming, Harvard ForestCO2 enrichment, Duke Forest

Disturbance chronosequence(Law et al. 2004, Irvine et al. 2008) Human modification of land use may be a dominant control on carbon-nutrient-climate interactions over the coming century4FLUXNET: From Sea to Shining Sea543+ Sites, circa 2008

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Network RepresentativenessSundareshwar et al, 2007 Science7Global distribution of Flux Towers with Respect to Climate

8Institutional Memory:Evolution of FLUXNETMeasure Annual Cycle of NEEMicromet issues of Detrending, Transfer Functions, Flux Sampling and Measurements, Gap-filling, Error AssessmentMeasure and Interpret Intra-annual Variation of NEEFlux partitioning (GPP & Reco); assessment of metadata,e.g. Vcmax, soil respiration, LAI, biomass inventories. Quantifying Biophysical Controls on FluxesMeasure and Interpret Inter-annual variations of NEEMeasure NEE over multiple Land-Use Classescrops, grasslands, deciduous and evergreen broadleaf and conifer forestsDisturbance, logging, biodiversity and fireManipulative StudiesNitrogen and H2O additionsMeasure NEE over Representative AreasScaling Flux Information of Footprint to MODIS pixel

WorkshopsLaThuile Italy, 1995Flathead Lake MT, 1997Marconi CA, 2000Orvieto Italy, 2002Lake Tahoe CA, 2003Firenze Italy, 2004LaThuile, 20079FLUXNET SuccessesMountains of data from a spectrum of canopy roughness and stability conditions, functional types and climate spaces have been collectedA Model for Data SharingFLUXNET Web Site, a venue for distributing Primary, Value-added and Meta-Data productsValue-Added Products have been producedDevelopment of Gap-Filling TechniquesProduction of Gap-Filled Daily and Annual SumsMany New Findings on Emergent Processes, Environmental Controls and Seasonality and Annual C fluxesData for Validating and Improving SVAT models used for weather, climate, biogeochemistry and ecosystem dynamicsCollaboration & Synthesis through Workshops and Hosting VisitorsBuilding a Collaborative, Cooperative, Multi-Disciplinary & International Community of ResearchersTraining New and Next Generation of Scientists, Postdocs, Students10Failures/Un-resolved IssuesNot Measuring Night-time Fluxes WellImPerfect U* correction Not Measuring Fluxes over Complex terrain and during Advection WellImPerfect Flux PartitioningWorks Better on Longer Time ScalesImPerfect Energy Balance ClosureCould be red-herring based limited Rn and G fetch11FLUXNET Project OfficePostdocRodrigo VargasHost VisitorsPaul StoySebastiaan LuyssaertProduce FLUXNET NewsletterConsult to Data Archives LBL and ORNLCoordinate Synthesis ProjectsSponsor WorkshopLaThuile, 2007AGU, 2008Asilomar, 2009

LaThuile Fluxnet Workshop, Feb. 2007New Gap-Filled, Qa/Qc Dataset250 Sites; 930 Site-years of Datawww.fluxdata.org

13Current and Future Scientific DirectionsNEE in Urban and Suburban, Africa, India, Latin America and High Arctic EnvironmentsQuantifying and Understanding the controls on Interannual Variability of C and energy FluxesMonitoring the Metabolism of Ecosystems as we undergo Global ChangeCoupling CO2, Trace Gas Deposition/Emission (O3, voc) and Methane FluxesAdopting New Technology (TDL, wireless networks) to embellish flux measurementsCouple tower data with Real-time Data Assimilation Models.Boundary Layer Budgets using Fluxes and High Precision CO2 measurementsSpectral reflectance measurements and Digital Photos across the network for phenology and dynamics of structure and functionSpatial-Temporal Network-Scale AnalysisReal-time Data AssimilationMatching Footprints of Tower and PixelsModel Lags, Switches and PulsesUsing Fluxnet data to assess problems inEcology, Ecohydrology, Biogeochemistry, Biogeography, Remote Sensing, Global Modeling, BiodiversityTesting Maximum Entropy, Ecosystem Ecology, Biogeography and EcoHydrology Theories

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