The BETHY/JSBACH Carbon Cycle Data Assimilation System: experiences and challenges
Article first published online: 9 OCT 2013
©2013. American Geophysical Union. All Rights Reserved.
Journal of Geophysical Research: Biogeosciences
Volume 118, Issue 4, pages 1414–1426, December 2013
How to Cite
2013), The BETHY/JSBACH Carbon Cycle Data Assimilation System: experiences and challenges, J. Geophys. Res. Biogeosci., 118, 1414–1426, doi:10.1002/jgrg.20118., et al. (
- Issue published online: 17 JAN 2014
- Article first published online: 9 OCT 2013
- Accepted manuscript online: 17 SEP 2013 03:50PM EST
- Manuscript Accepted: 11 SEP 2013
- Manuscript Revised: 8 SEP 2013
- Manuscript Received: 29 JUN 2013
 We present the concept of the Carbon Cycle Data Assimilation System and describe its evolution over the last two decades from an assimilation system around a simple diagnostic model of the terrestrial biosphere to a system for the calibration and initialization of the land component of a comprehensive Earth system model. We critically review the capability of this modeling framework to integrate multiple data streams, to assess their mutual consistency and with the model, to reduce uncertainties in the simulation of the terrestrial carbon cycle, to provide, in a traceable manner, reanalysis products with documented uncertainty, and to assist the design of the observational network. We highlight some of the challenges we met and experience we gained, give recommendations for operating the system, and suggest directions for future development.