Interactive impacts of fire and vegetation dynamics on global carbon and water budget using Community Land Model version 4.5

Hocheol Seo, Yeonjoo Kim

Research output: Contribution to journalArticle

Abstract

Fire plays an important role in terrestrial ecosystems. The burning of biomass affects carbon and water fluxes and vegetation distribution. To understand the effect of interactive processes of fire and ecological succession on surface carbon and water fluxes, this study employed the Community Land Model version 4.5 to conduct a series of experiments that included and excluded fire and dynamic vegetation processes. Results of the experiments that excluded the vegetation dynamics showed a global increase in net ecosystem production (NEP) in post-fire regions, whereas the inclusion of vegetation dynamics revealed a fire-induced decrease in NEP in some regions, which was depicted when the dominant vegetation type was changed from trees to grass. Carbon emissions from fires are enhanced by reduction in NEP when vegetation dynamics are considered; however, this effect is somewhat mitigated by the increase in NEP when vegetation dynamics are not considered. Fire-induced changes in vegetation modify the soil moisture profile because grasslands are more dominant in post-fire regions. This results in less moisture within the top soil layer than that in unburned regions, even though transpiration is reduced overall. These findings are different from those of previous fire model evaluations that ignored vegetation dynamics and thus highlight the importance of interactive processes between fires and vegetation dynamics in evaluating recent model developments.

Original languageEnglish
Pages (from-to)457-472
Number of pages16
JournalGeoscientific Model Development
Volume12
Issue number1
DOIs
Publication statusPublished - 2019 Jan 29

Fingerprint

carbon budget
vegetation dynamics
Vegetation
water budget
Carbon
Fires
Water
net ecosystem production
Ecosystem
Ecosystems
Model
land
Community
Fluxes
Model Evaluation
Transpiration
Soil Moisture
vegetation
carbon
Soil moisture

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Earth and Planetary Sciences(all)

Cite this

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Interactive impacts of fire and vegetation dynamics on global carbon and water budget using Community Land Model version 4.5. / Seo, Hocheol; Kim, Yeonjoo.

In: Geoscientific Model Development, Vol. 12, No. 1, 29.01.2019, p. 457-472.

Research output: Contribution to journalArticle

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