Litter moisture adsorption is tied to tissue structure, chemistry, and energy concentration

Talhelm, Alan F.; Smith, Alistair M. S.

doi:10.1002/ecs2.2198

Cited by 9 publications

(8 citation statements)

References 73 publications

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“…The 4 mm h -1 rainfall accumulated water more slowly, while the 11 and 24 mm treatments behaved similarly. At the end of the experiment, the MaxWC values (5.9 to 6.6 g H2O g -1 dry residue) obtained for pea, maize and rice were significantly higher than the range (1 to 3 g H2O g -1 dry residue) previously reported by several authors (Kreye et al, 2013;Dunkerley, 2015;Talhelm & Smith, 2018). Soybean mulches retained less water, even at high cumulative rain amounts, than the other three residues, which cannot be explained by the initial differences in the bulk density of these mulches, and we hypothesize that this is due to the high proportion of high-density soybean material and low water retention of soybean pods.…”

Section: Water Dynamics Under Simulated Rainscontrasting

confidence: 65%

Water interception and release of soluble carbon by mulches of plant residues under contrasting rain intensities

Thiébeau

Girardin

Recous

2021

Soil and Tillage Research

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Section: Water Dynamics Under Simulated Rainscontrasting

confidence: 65%

Water interception and release of soluble carbon by mulches of plant residues under contrasting rain intensities

Thiébeau

Girardin

Recous

2021

Soil and Tillage Research

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“…Models of fire behavior and effects span spatial and temporal scales, but fundamental to each is the consideration of fuels, vegetation, and emissions. We must work to capture fuel heterogeneity, including the physiological dynamics that influence vegetation fuel loading (157), fuel moisture (158,159), and the flammability of live and dead vegetation (160,161). Fuel moisture and its variation in space and time have the capacity to alter fire behavior (162) and ecosystem vulnerability to wildfire (163).…”

Section: : Challenge: Develop Coupled Models That Include Human Dimen...mentioning

confidence: 99%

Reimagine fire science for the anthropocene

et al. 2022

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Fire is an integral component of ecosystems globally and a tool that humans have harnessed for millennia. Altered fire regimes are a fundamental cause and consequence of global change, impacting people and the biophysical systems on which they depend. As part of the newly emerging Anthropocene, marked by human-caused climate change and radical changes to ecosystems, fire danger is increasing, and fires are having increasingly devastating impacts on human health, infrastructure, and ecosystem services. Increasing fire danger is a vexing problem that requires deep transdisciplinary, trans-sector, and inclusive partnerships to address. Here, we outline barriers and opportunities in the next generation of fire science and provide guidance for investment in future research. We synthesize insights needed to better address the long-standing challenges of innovation across disciplines to (i) promote coordinated research efforts; (ii) embrace different ways of knowing and knowledge generation; (iii) promote exploration of fundamental science; (iv) capitalize on the “firehose” of data for societal benefit; and (v) integrate human and natural systems into models across multiple scales. Fire science is thus at a critical transitional moment. We need to shift from observation and modeled representations of varying components of climate, people, vegetation, and fire to more integrative and predictive approaches that support pathways towards mitigating and adapting to our increasingly flammable world, including the utilization of fire for human safety and benefit. Only through overcoming institutional silos and accessing knowledge across diverse communities can we effectively undertake research that improves outcomes in our more fiery future.

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“…However, modeling fine fuel moisture is challenging because there are limited empirical studies elucidating the mechanisms driving water adsorption by plant litter. In one study, Talhelm and Smith (2018) observed relationships between water adsorption and the structure and chemistry of leaf litter. Notably, it was shown that litter with high concentrations of heat content and lignin exhibited lower water adsorption (Talhelm & Smith, 2018).…”

Section: Temperature and Moisture Effects On Decompositionmentioning

confidence: 99%

Missing Climate Feedbacks in Fire Models: Limitations and Uncertainties in Fuel Loadings and the Role of Decomposition in Fine Fuel Accumulation

Hanan

Kennedy

Ren

et al. 2022

J Adv Model Earth Syst

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Climate change has lengthened wildfire seasons and transformed fire regimes throughout the world. Thus, capturing fuel and fire dynamics is critical for projecting Earth system processes in warmer and drier future. Recent advances in fire regime modeling have linked land surface models with fire behavior models. Such models often rely on fine surface fuels to drive fire behavior and effects, and while many models can simulate processes that control how these fuels change through time (i.e., fine fuel accumulation), fuel loading estimates remain highly uncertain, largely due to uncertainties in the algorithms controlling decomposition. Uncertainties are often amplified in climate change forecasts when initial conditions and feedbacks are not well represented. The goal of this review is to highlight fine fuel decomposition as a key uncertainty in model systems. We review the current understanding of mechanisms controlling decomposition, describe how they are incorporated into models, and evaluate the uncertainties associated with different approaches. We also use three state‐of‐the‐art land surface fire regime models to demonstrate the sensitivity of decomposition and subsequent wildfire projections to both parameter and model structure uncertainty and show that sensitivity can increase substantially under future climate warming. Given that many of the governing decomposition equations are based on individual case studies from a single location, and because key parameters are often hard coded, critical uncertainties are currently ignored. It is essential to be transparent about these uncertainties as the domain of land surface models is expanded to include the evaluation of future wildfire regimes.

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Litter moisture adsorption is tied to tissue structure, chemistry, and energy concentration

Cited by 9 publications

References 73 publications

Water interception and release of soluble carbon by mulches of plant residues under contrasting rain intensities

Water interception and release of soluble carbon by mulches of plant residues under contrasting rain intensities

Reimagine fire science for the anthropocene

Missing Climate Feedbacks in Fire Models: Limitations and Uncertainties in Fuel Loadings and the Role of Decomposition in Fine Fuel Accumulation

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