Carbon Fluxes
This page has the information of how to access and use the FLUXCOM carbon fluxes data products. The data are publicly available for download from Data Portal of the Max Planck Institute for Biogeochemistry. All data download will be handled through the portal.
FTP Access
The native FLUXCOM carbon flux products amount to more than 4 TB of data. Products with daily or 8-daily temporal resolution or customized ensemble estimates are available on request to Martin Jung (mjung@bgc-jena.mpg.de).
The overview of all carbon fluxes from FLUXCOM is provided in the synthesis paper published in Biogeosciences.
Monthly carbon flux data of all ensemble members as well as the ensemble estimates from the FLUXCOM initiative are freely available (CC4.0 BY licence) from the Data Portal after registration. Choose ‘FluxCom’ in the dropdown menu of the database and select FileID 260.
The users will be provided with an access to a ftp server.
FTP Directory Structure
The ftp directory stores 179+ GB of data and is structured in a consistent way with the file naming in Table below. The folder structure was designed to facilitate easy download of relevant subsets of the archive and is as per the following convention:
SETUP/TYPE/sReso or METEO/tRESO"
- SETUP is either “RS” or “RS_METEO”.
- TYPE is either “ensemble” or “member”.
- At the third level,
- RS uses sRESO (“720_360” or “4320_2160”)
- RS+METEO uses METEO (see Table below).
- tRESO is “monthly” or "annual" here. The daily resolution data is available upon request, and it will be provided in the same ftp structure under "daily".
File Naming Conventions
The files are provided in network Common Data Form, version 4 (netCDF-4) data format. The data files are named using the following convention:
CF.SETUP.FP.MLM.METEO.sRESO.tRESO.YYYY.nc
Key to naming convention used for the folder structure and naming conventions.
| SN | item | information | prefix | values |
|---|---|---|---|---|
| 1 | CF | Carbon flux | no prefix | - GPP, TER, NEE |
| 2 | SETUP | Upscaling set up | no prefix | - RS: for RS products - RS_METEO: for RS+METEO products |
| 2 | FP | Flux partitioning method | FP- | - ALL: for ensembles that include GPP and TER from all flux partitioning methods - NONE: no flux partitioning - DT: carbon fluxes partitioned using daytime NEE fluxes - NT: carbon fluxes partitioned using night-time NEE fluxes Note that FP is always NONE for NEE. |
| 3 | MLM | Machine learning method | MLM- | - ALL: for ensembles that include carbon fluxes from all machine learning methods - ANN, MARS, or RF for carbon fluxes from RS+METEO - RF, ANN, MARS, GMDH, KRR, MTE, MTEV, MTEM, or SVM for carbon fluxes from RS |
| 4 | METEO | Meteorological data | METEO- | - ALL: for RS+METEO ensembles that include carbon fluxes from all meteorological data - CERES_GPCP, CRUJRA_v1, ERA5, GSWP3, or WFDEI: for RS+METEO products using different meteorological data - NONE: for all carbon fluxes from RS (because RS does not use meteorological forcing data) |
| 5 | sRESO | Spatial resolution | no prefix | - 720_360: for 0.5°x0.5° native RS+METEO and spatially aggregated RS data - 4320_2160: for 0.0833°x0.0833° native RS data |
| 6 | tRESO | Temporal resolution | no prefix | - monthly: for all data files |
| 7 | YYYY | Year | no prefix | - the year for which the data is |
Usage Notes for Carbon Fluxes
The usages of FLUXCOM carbon fluxes data as well as the potential limitations are also extensively discussed in the overview and sysnthesis manuscript. Please refer the manuscript for a detailed explanation.
Carbon FLuxes Subset from Jung et al., 2017
The subset of carbon fluxes data used in Jung et al. (2017) is also available separately through the Data Portal of the Max Planck Institute for Biogeochemistry. This data can be downloaded by selecting FLUXCOM project in the dropdown menu. The system requires a registration, and the download link is sent to the registered email address only.