Preprints
https://doi.org/10.5194/gmd-2023-207
https://doi.org/10.5194/gmd-2023-207
Submitted as: model description paper
 | 
22 Nov 2023
Submitted as: model description paper |  | 22 Nov 2023
Status: this preprint is currently under review for the journal GMD.

Assessment of a multi-tiling energy budget approach in a land surface model, ORCHIDEE-MICT (r8205)

Yi Xi, Chunjing Qiu, Yuan Zhang, Dan Zhu, Shushi Peng, Gustaf Hugelius, Jinfeng Chang, Elodie Salmon, and Philippe Ciais

Abstract. The surface energy budget plays a critical role in terrestrial hydrologic and biogeochemical cycles. Nevertheless, its highly spatial heterogeneity across different vegetation types is still missing in the land surface model, ORCHIDEE-MICT (ORganizing Carbon and Hydrology in Dynamic EcosystEms–aMeliorated Interactions between Carbon and Temperature). In this study, we describe the representation of a multi-tiling energy budget in ORCHIDEE-MICT, and assess its short and long-term impacts on energy, hydrology, and carbon processes. With the specific values of surface properties for each vegetation type, the new version presents warmer surface and soil temperatures, wetter soil moisture, and increased soil organic carbon storage across the Northern Hemisphere. Despite reproducing the absolute values and spatial gradients of surface and soil temperatures from satellite and in-situ observations, the considerable uncertainties in simulated soil organic carbon and hydrologic processes prevent an obvious improvement of temperature bias existing in the original ORCHIDEE-MICT. However, the separation of sub-grid energy budgets in the new version improves permafrost simulation greatly by accounting for the presence of discontinuous permafrost type, which will facilitate various permafrost-related studies in the future.

Yi Xi, Chunjing Qiu, Yuan Zhang, Dan Zhu, Shushi Peng, Gustaf Hugelius, Jinfeng Chang, Elodie Salmon, and Philippe Ciais

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2023-207', Joe Melton, 09 Jan 2024
  • RC2: 'Comment on gmd-2023-207', Anonymous Referee #2, 18 Feb 2024
Yi Xi, Chunjing Qiu, Yuan Zhang, Dan Zhu, Shushi Peng, Gustaf Hugelius, Jinfeng Chang, Elodie Salmon, and Philippe Ciais

Model code and software

ORCHIDEE-MICT-teb (r8205) Yi XI https://doi.org/10.14768/0954a0e9-6a7a-4006-803e-4db36ef2db88

Code for GMD paper: Assessment of a multi-tiling energy budget approach in a land surface model, ORCHIDEE-MICT (r8205) Yi XI https://doi.org/10.5281/zenodo.10014533

Yi Xi, Chunjing Qiu, Yuan Zhang, Dan Zhu, Shushi Peng, Gustaf Hugelius, Jinfeng Chang, Elodie Salmon, and Philippe Ciais

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Short summary
The ORCHIDEE-MICT (ORganizing Carbon and Hydrology in Dynamic EcosystEms–aMeliorated Interactions between Carbon and Temperature) model can simulate carbon cycle and hydrology at subgrid scale but energy budgets only at grid scale. This paper assessed the implementation of a multi-tiling energy budget approach in ORCHIDEE-MICT and found that warmer surface and soil temperatures, wetter soil moisture, and more soil organic carbon across the Northern Hemisphere compared to the original version.