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Title: Lambda-PFLOTRAN 1.0: a workflow for incorporating organic matter chemistry informed by ultra high resolution mass spectrometry into biogeochemical modeling

Journal Article · · Geoscientific Model Development (Online)

Organic matter (OM) composition plays a central role in microbial respiration of dissolved organic matter and subsequent biogeochemical reactions. Here, a direct connection of organic matter chemistry and thermodynamics to reactive transport simulators has been achieved through the newly developed Lambda-PFLOTRAN workflow tool that succinctly incorporates carbon chemistry data generated from Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) into reaction networks to simulate organic matter degradation and the resulting biogeochemistry. Lambda-PFLOTRAN is a Python-based workflow, executed through a Jupyter notebook interface, that digests raw FTICR-MS data, develops a representative reaction network based on substrate-explicit thermodynamic modeling (also termed lambda modeling due to its key thermodynamic parameter λ used therein), and completes a biogeochemical simulation with the open source, reactive flow and transport code PFLOTRAN. The workflow consists of the following five steps: configuration, thermodynamic (lambda) analysis, sensitivity analysis, parameter estimation, and simulation output and visualization. Two test cases are provided to demonstrate the functionality of the Lambda-PFLOTRAN workflow. The first test case uses laboratory incubation data of temporal oxygen depletion to fit lambda parameters (i.e., maximum utilization rate and microbial carrying capacity). A slightly more complex second test case fits multiple lambda formulation and soil organic matter release parameters to temporal greenhouse gas generation measured during a soil incubation. Overall, the Lambda-PFLOTRAN workflow facilitates upscaling by using molecular-scale characterization to inform biogeochemical processes occurring at larger scales.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth & Environmental Systems Science (EESS)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2483358
Report Number(s):
PNNL-SA--194808
Journal Information:
Geoscientific Model Development (Online), Journal Name: Geoscientific Model Development (Online) Journal Issue: 24 Vol. 17; ISSN 1991-9603
Publisher:
Copernicus Publications, EGUCopyright Statement
Country of Publication:
United States
Language:
English

References (26)

Elements of Information Theory book April 2005
Evaluating the performance of parallel subsurface simulators: An illustrative example with PFLOTRAN: Evaluating the Parallel Performance of Pflotran journal January 2014
A History of Molecular Level Analysis of Natural Organic Matter by FTICR Mass Spectrometry and The Paradigm Shift in Organic Geochemistry journal December 2020
Biomarker heatmaps: visualization of complex biomarker data to detect storm-induced source changes in fluvial particulate organic carbon journal June 2023
The Essence of Metabolic Engineering book January 1998
Sequential extraction protocol for organic matter from soils and sediments using high resolution mass spectrometry journal June 2017
Ensemble smoother with multiple data assimilation journal June 2013
DART-PFLOTRAN: An ensemble-based data assimilation system for estimating subsurface flow and transport model parameters journal August 2021
Formularity: Software for Automated Formula Assignment of Natural and Other Organic Matter from Ultrahigh-Resolution Mass Spectra journal November 2017
Soil Organic Matter Characterization by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICR MS): A Critical Review of Sample Preparation, Analysis, and Data Interpretation journal July 2021
Carbon Limitation Leads to Thermodynamic Regulation of Aerobic Metabolism journal May 2020
A Mechanistic Model of Microbially Mediated Soil Biogeochemical Processes: A Reality Check journal June 2019
Using Mutual Information for Global Sensitivity Analysis on Watershed Modeling journal October 2022
Numerical modeling of natural and enhanced denitrification processes in aquifers journal June 1991
A thermodynamic theory of microbial growth journal February 2014
Persistence of soil organic matter as an ecosystem property journal October 2011
Degradation of terrestrially derived macromolecules in the Amazon River journal May 2013
Influences of organic carbon speciation on hyporheic corridor biogeochemistry and microbial ecology journal February 2018
Persistence of soil organic carbon caused by functional complexity journal July 2020
A Generalized Method for Thermodynamic State Analysis of Environmental Systems journal January 2010
Development of microbial-enzyme-mediated decomposition model parameters through steady-state and dynamic analyses journal January 2013
Representing Organic Matter Thermodynamics in Biogeochemical Reactions via Substrate-Explicit Modeling journal October 2020
Exploring the determinants of organic matter bioavailability through substrate-explicit thermodynamic modeling journal July 2023
Unifying soil organic matter formation and persistence frameworks: the MEMS model journal January 2019
Maximum respiration rates in hyporheic zone sediments are primarily constrained by organic carbon concentration and secondarily by organic matter chemistry journal July 2023
The PFLOTRAN Reaction Sandbox journal February 2022