Nonlinear Processes in Geophysics
Nonlinear Processes in Geophysics
NPG
Articles | Volume 24, issue 2
Articles | Volume 24, issue 2
https://doi.org/10.5194/npg-24-125-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/npg-24-125-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 24, issue 2
Research article
 | 
06 Mar 2017
Research article |  | 06 Mar 2017

Insights on the role of accurate state estimation in coupled model parameter estimation by a conceptual climate model study

Xiaolin Yu, Shaoqing Zhang, Xiaopei Lin, and Mingkui Li

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Latest update: 26 Oct 2025
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Short summary
Parameter estimation (PE) with a global coupled data assimilation (CDA) system can improve the runs, but the improvement remains in a limited range. We have to come back to simple models to sort out the sources of noises. Incomplete observations and the chaotic nature of the atmosphere have much stronger influences on the PE through the state estimation (SE) process. Here, we propose the guidelines of how to enhance the signal-to-noise ratio under partial SE status.
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