Simulating measurable ecosystem carbon and nitrogen dynamics with the mechanistically defined MEMS 2.0 model
Abstract
For decades, predominant soil biogeochemical models have used conceptual soil organic matter (SOM) pools and only simulated them to a shallow depth in soil. Efforts to overcome these limitations have prompted the development of the new generation SOM models, including MEMS 1.0, which represents measurable biophysical SOM fractions, over the entire root zone, and embodies recent understanding of the processes that govern SOM dynamics. Here we present the result of continued development of the MEMS model, version 2.0. MEMS 2.0 is a full ecosystem model with modules simulating plant growth with above- and belowground inputs, soil water and temperature by layer, decomposition of plant inputs and SOM, and mineralization and immobilization of nitrogen (N). The model simulates two commonly measured SOM pools – particulate and mineral-associated organic matter (POM and MAOM, respectively). We present results of calibration and validation of the model with several grassland sites in the US. MEMS 2.0 generally captured the soil carbon (C) stocks (R2 of 0.89 and 0.6 for calibration and validation, respectively) and their distributions between POM and MAOM throughout the entire soil profile. The simulated soil N matches measurements but with lower accuracy (R2 of 0.73 and 0.31 for calibration and validation of totalmore »
- Publication Date:
- Research Org.:
- Colorado State Univ., Fort Collins, CO (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E); National Science Foundation (NSF); Shell Inc.
- OSTI Identifier:
- 1784795
- Alternate Identifier(s):
- OSTI ID: 1848280
- Grant/Contract Number:
- AR0000826; 1743237; 2016003; 4550183252
- Resource Type:
- Published Article
- Journal Name:
- Biogeosciences (Online)
- Additional Journal Information:
- Journal Name: Biogeosciences (Online) Journal Volume: 18 Journal Issue: 10; Journal ID: ISSN 1726-4189
- Publisher:
- Copernicus GmbH
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; environmental sciences & ecology; geology
Citation Formats
Zhang, Yao, Lavallee, Jocelyn M., Robertson, Andy D., Even, Rebecca, Ogle, Stephen M., Paustian, Keith, and Cotrufo, M. Francesca. Simulating measurable ecosystem carbon and nitrogen dynamics with the mechanistically defined MEMS 2.0 model. Germany: N. p., 2021.
Web. doi:10.5194/bg-18-3147-2021.
Zhang, Yao, Lavallee, Jocelyn M., Robertson, Andy D., Even, Rebecca, Ogle, Stephen M., Paustian, Keith, & Cotrufo, M. Francesca. Simulating measurable ecosystem carbon and nitrogen dynamics with the mechanistically defined MEMS 2.0 model. Germany. https://doi.org/10.5194/bg-18-3147-2021
Zhang, Yao, Lavallee, Jocelyn M., Robertson, Andy D., Even, Rebecca, Ogle, Stephen M., Paustian, Keith, and Cotrufo, M. Francesca. Wed .
"Simulating measurable ecosystem carbon and nitrogen dynamics with the mechanistically defined MEMS 2.0 model". Germany. https://doi.org/10.5194/bg-18-3147-2021.
@article{osti_1784795,
title = {Simulating measurable ecosystem carbon and nitrogen dynamics with the mechanistically defined MEMS 2.0 model},
author = {Zhang, Yao and Lavallee, Jocelyn M. and Robertson, Andy D. and Even, Rebecca and Ogle, Stephen M. and Paustian, Keith and Cotrufo, M. Francesca},
abstractNote = {For decades, predominant soil biogeochemical models have used conceptual soil organic matter (SOM) pools and only simulated them to a shallow depth in soil. Efforts to overcome these limitations have prompted the development of the new generation SOM models, including MEMS 1.0, which represents measurable biophysical SOM fractions, over the entire root zone, and embodies recent understanding of the processes that govern SOM dynamics. Here we present the result of continued development of the MEMS model, version 2.0. MEMS 2.0 is a full ecosystem model with modules simulating plant growth with above- and belowground inputs, soil water and temperature by layer, decomposition of plant inputs and SOM, and mineralization and immobilization of nitrogen (N). The model simulates two commonly measured SOM pools – particulate and mineral-associated organic matter (POM and MAOM, respectively). We present results of calibration and validation of the model with several grassland sites in the US. MEMS 2.0 generally captured the soil carbon (C) stocks (R2 of 0.89 and 0.6 for calibration and validation, respectively) and their distributions between POM and MAOM throughout the entire soil profile. The simulated soil N matches measurements but with lower accuracy (R2 of 0.73 and 0.31 for calibration and validation of total N in SOM, respectively) than for soil C. Simulated soil water and temperature were compared with measurements, and the accuracy is comparable to the other commonly used models. The seasonal variation in gross primary production (GPP; R2 = 0.83), ecosystem respiration (ER; R2 = 0.89), net ecosystem exchange (NEE; R2 = 0.67), and evapotranspiration (ET; R2 = 0.71) was well captured by the model. We will further develop the model to represent forest and agricultural systems and improve it to incorporate new understanding of SOM decomposition.},
doi = {10.5194/bg-18-3147-2021},
journal = {Biogeosciences (Online)},
number = 10,
volume = 18,
place = {Germany},
year = {Wed May 26 00:00:00 EDT 2021},
month = {Wed May 26 00:00:00 EDT 2021}
}
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