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Title: Explicitly representing soil microbial processes in Earth system models: Soil microbes in earth system models

Journal Article · · Global Biogeochemical Cycles
DOI:https://doi.org/10.1002/2015GB005188· OSTI ID:1267596
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10]; ORCiD logo [11];  [12];  [13];  [14]
  1. National Center for Atmospheric Research, Boulder, CO (United States)
  2. Univ. of California, Irvine, CA (United States)
  3. Univ. of Maryland Center for Environmental Science, Frostburg, MD (United States). Appalachian Lab.
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Natural Resources Canada, Victoria, BC (Canada). Canadian Forest Service, Pacific Forestry Centre
  6. Univ. of California, Irvine, CA (United States); Purdue Univ., West Lafayette, IN (United States)
  7. Univ. of California, Irvine, CA (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)
  8. Univ. of Oklahoma, Norman, OK (United States)
  9. Microsoft Research, Cambridge (United Kingdom). Computational Science Lab.
  10. Indiana Univ., Bloomington, IN (United States)
  11. Univ. of Oklahoma, Norman, OK (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  12. CSIRO Ocean and Atmosphere Flagship, Aspendale, VIC (Australia)
  13. Univ. of Oklahoma, Norman, OK (United States); East China Normal Univ., Shanghai (China)
  14. Univ. of Texas at El Paso, TX (United States)

Microbes influence soil organic matter (SOM) decomposition and the long-term stabilization of carbon (C) in soils. Herein, we contend that by revising the representation of microbial processes and their interactions with the physicochemical soil environment, Earth system models (ESMs) may 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: (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.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); USDA; National Institute of Food and Agriculture
Contributing Organization:
Terrestrial Ecosystem Science (TES) Program
Grant/Contract Number:
AC05-76RL01830; DEB 0840964; SC0008270; 2015-67003-23485; SC0014374
OSTI ID:
1267596
Report Number(s):
PNNL-SA-113961
Journal Information:
Global Biogeochemical Cycles, Vol. 29, Issue 10; ISSN 0886-6236
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 213 works
Citation information provided by
Web of Science

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