Nonlinear interactions of land carbon cycle feedbacks in Earth System Models

Abstract

Earth System Model (ESM) has become a major tool for studying the responses of the Earth system to anthropogenic CO 2 emissions and interactions among different processes. CO 2 is a substrate for primary production. Elevated atmospheric concentration of CO 2 (eCO 2 ) affects biogeochemical activities across land and ocean.Increase in land carbon uptake over the last three decades was largely attributed to the positive response of photosynthesis to increasing atmospheric CO 2 concentration or CO 2 fertilization effect

Microbial Adaptations Within Fine‐Scale Soil Structure Alleviate Phosphorus Limitation on Carbon Sequestration Following Afforestation

“…Moreover, our results underlined the importance of microbial adaptions in terms of community composition and metabolic activities within fine‐scale soil structure in alleviating P limitation on soil C sequestration following afforestation (Figure 6). These P dynamics from microscales have not yet been adequately investigated, and ignoring them may lead to inaccurate estimation of C sequestration potential by afforestation (Green & Keenan, 2022; Huang et al., 2022). For instance, current land‐use models are dominantly based on parameters involved in plant C metabolism (such as leaf photosynthesis), C stocks in plant biomass and soils, causing high variabilities in soil C stock and emission estimates (Albani et al., 2006; Y. Chen et al., 2021; Krause et al., 2018).…”

“…Therefore, the assemblies of aggregates with different physical, chemical and biological properties can be upscaled to influence biochemical fluxes and ecosystem functions following afforestation at the ecosystem level. However, soil P dynamics and its relative availability for C sequestration within different soil aggregate‐size fractions (i.e., fine‐scale soil structure) remain largely unknown, despite knowledge gained at larger scales from ecosystem to regional or global (C. R. Chen et al., 2008; Deng et al., 2016; Huang et al., 2022).…”

ACCESS datasets for CMIP6: methodology and idealised experiments

“…ACCESS data have also been used in many multimodel analyses (e.g. Watterson et al 2021;Huang et al 2022). CMIP6 publications are tracked at the CMIP Publication Hub, 21 which lists 208 publications (as of 8 April 2022), though tracking is dependent on authors adding their publication details, optionally with the models that have been included in their analysis.…”