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Title: Current developments in soil organic matter modeling and the expansion of model applications. A review

Journal Article · · Environmental Research Letters
 [1];  [1]
  1. Colorado State Univ., Fort Collins, CO (United States)

It is important to note that Soil organic matter (SOM) is a great natural resource. It is fundamental to soil and ecosystem functions across a wide range of scales, from site-specific soil fertility and water holding capacity to global biogeochemical cycling. It is also a highly complex material that is sensitive to direct and indirect human impacts. In our SOM research, simulation models play an important role by providing a mathematical framework to integrate, examine, and test the understanding of SOM dynamics. Simulation models of SOM are also increasingly used in more ‘applied’ settings to evaluate human impacts on ecosystem function, and to manage SOM for greenhouse gas mitigation, improved soil health, and sustainable use as a natural resource. Within this context, there is a need to maintain a robust connection between scientific developments in SOM modeling approaches and SOM model applications. This need forms the basis of this review. In this review we first provide an overview of SOM modeling, focusing on SOM theory, data-model integration, and model development as evidenced by a quantitative review of SOM literature. Second, we present the landscape of SOM model applications, focusing on examples in climate change policy. Finally, we conclude by discussing five areas of recent developments in SOM modeling including: (1) microbial roles in SOM stabilization; (2) modeling SOM saturation kinetics; (3) temperature controls on decomposition; (4)SOM dynamics in deep soil layers; and (5)SOM representation in earth system models. Our aim is to comprehensively connect SOM model development to its applications, revealing knowledge gaps in need of focused interdisciplinary attention and exposing pitfalls that, if avoided, can lead to best use of SOM models to support policy initiatives and sustainable land management solutions.

Research Organization:
South Dakota State Univ., Brookings, SD (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FC36-05GO85041
OSTI ID:
1240614
Journal Information:
Environmental Research Letters, Vol. 10, Issue 12; ISSN 1748-9326
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 125 works
Citation information provided by
Web of Science

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  • Laney, Christine M.; Pennington, Deana D.; Tweedie, Craig E.
  • Frontiers in Ecology and the Environment, Vol. 13, Issue 7 https://doi.org/10.1890/140341
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The Turnover of soil Organic Matter in some of the Rothamsted Classical Experiments journal January 1977
Terrestrial ecosystem production: A process model based on global satellite and surface data journal December 1993
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Quantitative analysis of factors affecting greenhouse gas emissions at institutions of higher education journal June 2013
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Uncertainty in climate’carbon-cycle projections associated with the sensitivity of soil respiration to temperature journal January 2003
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Soil carbon simulation confounded by different pool initialisation journal December 2019
Networking our science to characterize the state, vulnerabilities, and management opportunities of soil organic matter journal September 2017
How to measure, report and verify soil carbon change to realize the potential of soil carbon sequestration for atmospheric greenhouse gas removal journal October 2019
Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls journal November 2016
Carbon Turnover in a Sorghum-cultivated Semi-arid Mediterranean Soil Profile journal September 2019
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Beyond the black box: promoting mathematical collaborations for elucidating interactions in soil ecology journal July 2019
Zones of influence for soil organic matter dynamics: A conceptual framework for data and models journal August 2019
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Arable Podzols are A Substantial Carbon Sink under Current and Future Climate: Evidence From a Long-Term Experiment in Vladimir Region, Russia preprint December 2020
Additional carbon inputs to reach a 4 per 1000 objective in Europe: feasibility and projected impacts of climate change based on Century simulations of long-term arable experiments journal July 2021
Unifying soil organic matter formation and persistence frameworks: the MEMS model posted_content October 2018