Inverse Determination of the Influence of Fire on Vegetation Carbon Turnover in the Pantropics

Jean François Exbrayat, T. Luke Smallman, A. Anthony Bloom, Lindsay B. Hutley, Mathew Williams

    Research output: Contribution to journalArticlepeer-review

    23 Downloads (Pure)

    Abstract

    Fire is a major component of the terrestrial carbon cycle that has been implemented in most current global terrestrial ecosystem models. Here we use terrestrial carbon cycle observations to characterize the importance of fire regime gradients in the spatial distribution of ecosystem functional properties such as carbon allocation, fluxes, and turnover times in the tropics. A Bayesian model-data fusion approach is applied to an ecosystem carbon model to derive the posterior distribution of corresponding parameters for the tropics from 2000 to 2015. We perform the model-data fusion procedure twice, that is, with and without imposing fire. Gradient of differences in model parameters and ecosystem properties in response to fire emerge between these experiments. For example, mean annual burned fraction correlates with an increase in carbon use efficiency and reductions in carbon turnover times. Further, our analyses reveal an increased allocation to more fire-resistant tissues in the most frequently burned regions. As fire modules are increasingly implemented in global terrestrial ecosystem models, we recommend that model development includes a representation of the impact of fire on ecosystem properties as they may lead to large differences under climate change projections.

    Original languageEnglish
    Pages (from-to)1776-1789
    Number of pages14
    JournalGlobal Biogeochemical Cycles
    Volume32
    Issue number12
    Early online date1 Jan 2018
    DOIs
    Publication statusPublished - Dec 2018

    Fingerprint

    Dive into the research topics of 'Inverse Determination of the Influence of Fire on Vegetation Carbon Turnover in the Pantropics'. Together they form a unique fingerprint.

    Cite this