Introduction

Motivation:

• Evaluation of CTESSEL model fluxes from diurnal/synoptic/seasonal.
• Attribution of biogenic flux correction into GPP and Reco

SIF linear operator

Extending BFAS with SIF

BFAS-SIF GPP/Reco correction coefficients and resulting budgets

IFS CO2 experiments

IFS CO2 experiments have been performed  with resolution tco399 (~25km) L137.

Impact of BFAS-SIF on NEE/GPP/Reco seasonal cycle, synoptic variability and diurnal cycle

FLUXNET    FLUXCOM    CTESSEL_orig   CTESSEL_bfas(dash)   CTESSEL_bfas_sif    PYVAR18  PYVARFT19

FLUXNET Site	Seasonal cycle (weekly mean fluxes)	Diurnal cycle (hourly fluxes)
SE-Nor (ENF)
SE-Htm (ENF)
SE-Svb (ENF)
SE-Lnn (CRO)
SE-Ros (ENF)
SE-Deg (WET)
FI-Hyy (ENF)
FI-Sii (WET)
BE-Bra (MF)
BE-Lon (CRO)
DE-Geb (CRO)
DK-Sor (DBF)
FR-Bil (ENF)
FR-Hes (DBF)
CH-Dav (ENF)
CH-Fru (Unknown)
CH-Lae (MF)
CH-Oe2 (CRO)
CH-Cha (GRA)
IT-Tor (GRA)
IT-Cp2 (EBF)
IT-SR2 (ENF)
ES-Abr (SAV)
ES-LM1 (SAV)
ES-LM2 (Unknown)

Impact of BFAS-SIF on CO2 seasonal cycle, synoptic variability and diurnal cycle

Site	Seasonal cycle (daily mean CO2)	Synoptic variability (daily mean CO2)	Diurnal cycle (hourly CO2)
LEF Park Falls  (USA)
WBI (USA)
NOR Norunda (Sweden)
BIR (Norway)
HUN (Hungary)

Impact on total column CO2 (XCO2)

BFAS-CTRL    BFAS-SIF