The CAMS forecast e-suite (experiment gznv) was started on 2018-06-01 based on IFS CY45R1 to couple the new the GHG analysis experiment  (gwx3) running 4-days behind real time and the high resolution cyclic forecast run. This new experiment benefits from a couple of bug fixes in the modelled biogenic fluxes which result in an improved seasonal cycle in the northern hemisphere and some degradation in the tropics.

Main features are:

  • The experiment was initialized from the GHG analysis experiment gwx3.

  • The coupling with the analysis is done by merging the 4-day forecast from GHG delayed analysis experiment and the cyclic high resolution forecast.

  • Resolution: Tco1279 (9km) and 137 vertical levels
  • 5-day forecast from 00UTC
  • IFS cycle 45R1
  • Coupled to CTESSEL Net Ecosystem Exchange surface fluxes.
  • EDGARv4.2FT2010 anthropogenic emissions - scaled from 2011 with estimated and climatological trends for CO2.
  • GFASv1.2 fire emissions
  • Takahashi et al. (2009) CO2 air-sea CO2 flux climatology.
  • IFS model resolution Tco1279L137
  • operational meteorological analysis resolution
  • branch: paf_CY45R1_paf_CY45R1_GHG_CARBONTRAC_bugfixes
  • New tracer mass fixer: Diamantakis and Agusti-Panareda (2017) with BETA value of 2.

Changes introduced during production affecting the quality of the products

real dateexp datedescription of change
 20191106 20191101Experiment has been set to run in cyclic mode because GHG analysis (gwx3) was not available in near-real-time (technical problem )

Experiment has been reverted to nudging the initial conditions of the forecast with GHG analysis (gwx3) after it caught up in NRT (4 days behind RT)

Flux updates

real date  expdatedescription of change
2018081520180730CH4 flux bug fix associated with the temporal interpolation of monthly mean fluxes affecting second half of December.