Skip to Main content Skip to Navigation
New interface
Journal articles

Using a process-based dendroclimatic proxy system model in a data assimilation framework: a test case in the Southern Hemisphere over the past centuries

Abstract : Currently available data-assimilation-based reconstructions of past climate variations have only used statistical proxy system models to make the link between climate model outputs and indirect observations from tree rings. However, the linearity and stationarity assumptions of the statistical approach may have limitations. In this study, we incorporate the process-based dendroclimatic model MAIDEN into a data assimilation procedure using the reconstruction of near-surface air temperature, precipitation and winds in the midlatitudes of the Southern Hemisphere over the past 400 years as a test case. We compare our results with a data assimilation approach including a linear regression as a proxy system model for tree-ring width proxies. Overall, when compared to instrumental data, the reconstructions using MAIDEN as a proxy system model offer a skill equivalent to the experiment using the regression model. However, knowing the advantages that a process-based model can bring and the improvements that can still be made with MAIDEN, those results are promising.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03824751
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Friday, October 21, 2022 - 4:46:22 PM
Last modification on : Sunday, October 23, 2022 - 3:15:30 AM

File

cp-18-2093-2022.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Jeanne Rezsöhazy, Quentin Dalaiden, François Klein, Hugues Goosse, Joël Guiot. Using a process-based dendroclimatic proxy system model in a data assimilation framework: a test case in the Southern Hemisphere over the past centuries. Climate of the Past, 2022, 18, pp.2093-2115. ⟨10.5194/cp-18-2093-2022⟩. ⟨insu-03824751⟩

Share

Metrics

Record views

0

Files downloads

0