Representing high-latitude deep carbon in the pre-industrial  state of the ORCHIDEE-MICT land surface model (r8704)

Xi, Yi; Ciais, Philippe; Zhu, Dan; Qiu, Chunjing; Zhang, Yuan; Peng, Shushi; Hugelius, Gustaf; Bowring, Simon P. K.; Goll, Daniel S.; Wang, Ying-Ping

doi:https://doi.org/10.5194/gmd-18-6043-2025

Articles | Volume 18, issue 18

https://doi.org/10.5194/gmd-18-6043-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-18-6043-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 18

Development and technical paper

|

16 Sep 2025

Development and technical paper |

| 16 Sep 2025

Representing high-latitude deep carbon in the pre-industrial state of the ORCHIDEE-MICT land surface model (r8704)

Yi Xi, Philippe Ciais, Dan Zhu, Chunjing Qiu, Yuan Zhang, Shushi Peng, Gustaf Hugelius, Simon P. K. Bowring, Daniel S. Goll, and Ying-Ping Wang

Supplement

https://doi.org/10.5194/gmd-18-6043-2025-supplement

Data sets

Data and code for GMDD paper: Representing high-latitude deep carbon in the pre-industrial state of the ORCHIDEE-MICT land surface model (r8704) Yi Xi https://doi.org/10.5281/zenodo.15371113

``MGK'' database of peat inception (basal 14C ages) across the northern peatland domain J. Loisel https://doi.org/10.1594/PANGAEA.902549

Database of Ice-Rich Yedoma Permafrost Version 2 (IRYP v2) J. Strauss et al. https://doi.org/10.1594/PANGAEA.940078

Model code and software

Model code for ORCHIDEE-MICT-teb-deepc (r8704) Yi Xi https://doi.org/10.14768/704f7a4e-3a1d-4a51-8c70-1920c32684ce

Short summary

Including high-latitude deep carbon is critical for projecting future soil carbon emissions, yet it is absent in most land surface models. Here we propose a new carbon accumulation protocol by integrating deep carbon from Yedoma deposits and representing the observed history of peat carbon formation in ORCHIDEE-MICT. Our results show an additional 157 Pg C in present-day Yedoma deposits and a 1–5 m shallower peat depth and 43 % less passive soil carbon in peatlands compared to the conventional protocol.