Supplementary material to "Divergent predictions of northern peatland responses to climate warming and elevated CO 2 : A multi-model intercomparison at the SPRUCE experiment"
Year: 2026
Type: supplementary-materials
Abstract: This supplementary document provides supporting information for the SPRUCE-MIP intercomparison.It includes detailed descriptions of the participating models, supplementary figures supporting the analyses presented in the main manuscript, additional methodological information, and illustrative parameter sensitivity figures for ELM-SPRUCE (Figs.S7-S8).A separate list of references cited in the Supplementary Materials is provided at the end of this document. S1.1 CLASSICThe peatland module of the Canadian Land Surface Scheme Including Biogeochemical Cycles (CLASSIC) is described by (Wu et al., 2016), with the full land model documented by (Melton et al., 2020; Seiler et al., 2021).The version used here (v1.5) includes coupled carbon and nitrogen cycling (Asaadi and Arora, 2021; Kou-Giesbrecht and Arora, 2022).Vascular plant productivity responds dynamically to nitrogen availability, whereas Sphagnum productivity remains independent of simulated nitrogen dynamics because moss Vcmax is prescribed and moss nitrogen is not mineralized.Model parameters were not specifically calibrated for the SPRUCE site but were adopted from previous peatland applications and the CLASSIC peatland benchmarking collection ((Melton et al., 2022;Wu et al., 2016)).Although CLASSIC includes the WETMETH methane model (Nzotungicimpaye et al., 2021), both the nitrogen and methane modules were disabled for the present SPRUCE-MIP simulations. S1.2 CLM-MicrobeCLM-Microbe extends the CLM4.5 framework (Oleson et al., 2013) by incorporating a microbial functional group-based representation of methane production and consumption (Xu et al., 2015).The model explicitly represents dissolved organic carbon fermentation, hydrogenotrophic and acetoclactic methanogenesis, aerobic and anaerobic methanotrophy, and hydrogen production within the CLM4.5 decomposition framework (Koven et al., 2013).For SPRUCE-MIP, CLM-Microbe includes an explicit Sphagnum plant functional type with moss physiology (Shi et al.,
Authors: Xiaoying Shi, Daniel M. Ricciuto, Yaoping Wang, Joe R. Melton, Fortunat Joos, Yiqi Luo, Xiaofeng Xu, Dafeng Hui, Qianlai Zhuang, Chunjing Qiu, Hongxing He, Siya Shao, Xingjie Lu, Yongjiu Dai, Akihiko Ito, Qing Sun, Nitin Chaudhary, Ayesha Hussain, Mousong Wu, Jian Zhou, Jingwei Zhang, Ye Yuan, Rachael H. Turton, Eleanor J. Burke, Jiafu Mao, Yuefeng Hao, Natalie A. Griffiths, Verity Salmon, Paul J. Hanson, Melanie A. Mayes, Peter E. Thornton
Institution: Oak Ridge National Laboratory
Language: English
Subfield: Ecology
Field: Environmental Science
Domain: Physical Sciences
SDGs: Climate action, Life on land
Open Access status: gold
OpenAlex ID: W7204996216