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: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

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Cumulative views and downloads (calculated since 23 Jan 2025)

Month	HTML	PDF	XML	Total
Jan 2025	60	14	5	79
Feb 2025	76	17	5	98
Mar 2025	74	15	3	92
Apr 2025	26	9	1	36
May 2025	60	15	6	81
Jun 2025	35	17	10	62
Jul 2025	37	3	1	41
Aug 2025	101	7	5	113
Sep 2025	1,040	21	4	1,065
Oct 2025	146	35	7	188
Nov 2025	129	30	8	167
Dec 2025	116	38	8	162
Jan 2026	138	51	12	201
Feb 2026	152	29	6	187
Mar 2026	134	33	11	178
Apr 2026	159	44	7	210
May 2026	97	27	7	131
Jun 2026	32	10	5	47
Jul 2026	72	26	8	106
Aug 2026	56	13	26	95
Sep 2026	176	70	64	310
Oct 2026	187	83	38	308
Nov 2026	12	2	1	15

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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.