|orchidas : cams / CAMS41-CH4 /||Site Map|
Project CAMS41 Phase 2
Optimization of CH4 wetland emissions in CTESSEL model using FLUXNET-CH4 dataset and GCP inversion products
The optimization is performed in two steps:
1. Optimization of Q10
For the optimization 22 sites have been selected. All site simulations are performed with the same CTESSEL configuration:
The optimization is performed in multiple-site mode with 23 optimized parameters: s (individual scaling factor for each site) and Q10 (temperature dependency factor). The resulting Q10 value and site time-series are shown below.
2. Optimization of S
For optimization of the scaling factor the GCP-2019 inversion products have been used (median across 11 products). The global CTESSEL simulation is performed with E2OBS forcing for 2012-2014 starting from the scratch, the last year is used in the optimization.
The optimization has been performed in three different ways:
The resulting S values are shown below:
|Boreal North America||0.00612|
|Temperate North America||0.00468|
|Tropical South America||0.00232|
|Temperate South America||0.00637|
|Australia & New Zealand||0.00183|
The latitudinal and regional maps for S are shown below.
The maps in netcdf format can be downloaded here:
The resulting mean annual maps for observations (GCP products median), CTESSEL simulations obtained with different scaling factors and their differences are presented below:
The resulting mean seasonal cycle calculated for different regions together with the components of methane emission calculation are shown in the table:
|Region mask||CH4 flux||Wetland fraction||First soil layer temperature||Low vegetation respiration||High vegetation respiration|