Explicitly representing soil microbial processes in Earth system models

Global Biogeochemical Cycles - Tập 29 Số 10 - Trang 1782-1800 - 2015
William R. Wieder1, Steven Allison2,3, Eric A. Davidson4, Katerina Georgiou5,6, Oleksandra Hararuk7, Yujie He2,8, F. M. Hopkins2,9, Yiqi Luo10, Matthew J. Smith11, Benjamin N. Sulman12, Katherine EO Todd-Brown10,13, Ying‐Ping Wang14, Jianyang Xia10,15, Xiaofeng Xu16
1Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, Colorado, USA
2Department of Earth System Science, University of California, Irvine, California, USA
3Department of Ecology and Evolutionary Biology, University of California, Irvine, California, USA
4Appalachian Laboratory, University of Maryland Center for Environmental Science, Frostburg, Maryland, USA
5Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California, USA
6Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
7Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, British Columbia, Canada
8Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, Indiana, USA
9Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California USA
10Department of Microbiology & Plant Biology, University of Oklahoma, Norman, Oklahoma, USA
11Computational Science Laboratory, Microsoft Research, Cambridge, UK
12Department of Biology, Indiana University, Bloomington, Indiana, USA
13Pacific Northwest National Laboratory, Richland, Washington, USA
14CSIRO Ocean and Atmosphere Flagship, Aspendale, Victoria, Australia
15Tiantong National Forest Ecosystem Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
16Department of Biological Sciences, University of Texas at El Paso, Texas, USA

Tóm tắt

AbstractMicrobes influence soil organic matter decomposition and the long‐term stabilization of carbon (C) in soils. We contend that by revising the representation of microbial processes and their interactions with the physicochemical soil environment, Earth system models (ESMs) will make more realistic global C cycle projections. Explicit representation of microbial processes presents considerable challenges due to the scale at which these processes occur. Thus, applying microbial theory in ESMs requires a framework to link micro‐scale process‐level understanding and measurements to macro‐scale models used to make decadal‐ to century‐long projections. Here we review the diversity, advantages, and pitfalls of simulating soil biogeochemical cycles using microbial‐explicit modeling approaches. We present a roadmap for how to begin building, applying, and evaluating reliable microbial‐explicit model formulations that can be applied in ESMs. Drawing from experience with traditional decomposition models, we suggest the following: (1) guidelines for common model parameters and output that can facilitate future model intercomparisons; (2) development of benchmarking and model‐data integration frameworks that can be used to effectively guide, inform, and evaluate model parameterizations with data from well‐curated repositories; and (3) the application of scaling methods to integrate microbial‐explicit soil biogeochemistry modules within ESMs. With contributions across scientific disciplines, we feel this roadmap can advance our fundamental understanding of soil biogeochemical dynamics and more realistically project likely soil C response to environmental change at global scales.

Từ khóa


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Global Biogeochemical Cycles

Tập 29 Số 10

1782-1800

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