P Interim Synthesis: Continental Fluxes from Forward and Inverse Mo y Jacobson, Mac Post, Debbie Huntzinger, Bob Cook, and lots of model
Jan 15, 2016
NACP Interim Synthesis: Continental Fluxes from Forward and Inverse Models
Andy Jacobson, Mac Post, Debbie Huntzinger, Bob Cook, and lots of modelers
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Atmospheric Inversions
ForwardModels
Flux tower sites
NEE
flux footprint
size
site
continent
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North AmericaBoreal (NABR)
North America Temperate (NATM)
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Inversions25th
percentileCentral
75th percentile
Uptake 0.7 1.0 1.4
IAV peak-peak 0.8 1.2 1.6
IAV (sd) 0.26 0.34 0.44
Forward models
25th percentile
Central75th
percentile
Uptake 0.1 0.3-0.5 0.7
IAV peak-peak 0 0.2 0.4
IAV (sd) 0.04 0.10 0.19
North America (boreal and temperate) summary stats for NEE
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Atmospheric Inversions
ForwardModels
MODIS
Flux tower sites
NEE GPP
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No apparent relationship between GPP and NEP(in the same year, anyway)
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Conclusions
Inversions do manifest more seasonality, uptake, and IAV over N. America than forward models.
Inversions don't agree as well as one might hope.
MODIS GPP generally smaller than forward simulations.
MODIS, CASA models and DLEM see less GPP in 2002, but NEE signal is not apparent.
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