Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, Tasmania

Non-stand-replacing wildfires are the most common natural disturbance in the tall eucalypt forests of Tasmania, yet little is known about the conditions under which these fires burn and the effects they have on the forest. A dry lightning storm in January 2019 initiated the Riveaux Road fire. This f...

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Bibliographic Details
Main Author: Tim Wardlaw
Format: Article
Language:English
Published: MDPI AG 2021-03-01
Series:Fire
Subjects:
Online Access:https://www.mdpi.com/2571-6255/4/2/15
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author Tim Wardlaw
author_facet Tim Wardlaw
author_sort Tim Wardlaw
collection DOAJ
description Non-stand-replacing wildfires are the most common natural disturbance in the tall eucalypt forests of Tasmania, yet little is known about the conditions under which these fires burn and the effects they have on the forest. A dry lightning storm in January 2019 initiated the Riveaux Road fire. This fire burnt nearly 64,000 ha of land, including tall eucalypt forests at the Warra Supersite. At the Supersite, the passage of the fire was recorded by a suite of instruments measuring weather conditions and fluxes (carbon, water and energy), while a network of permanent plots measured vegetation change. Weather conditions in the lead-up and during the passage of the fire through the Supersite were mild—a moderate forest fire danger index. The passage of the fire through the Supersite caused a short peak in air temperature coinciding with a sharp rise in CO<sub>2</sub> emissions. Fine fuels and ground vegetation were consumed but the low intensity fire only scorched the understorey trees, which subsequently died and left the <i>Eucalyptus obliqua</i> canopy largely intact. In the aftermath of the fire, there was prolific seedling regeneration, a sustained reduction in leaf area index, and the forest switched from being a carbon sink before the fire to becoming a carbon source during the first post-fire growing season.
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spelling doaj.art-f1e8d3f2bd8247ca8773b6617d244a0f2023-11-21T12:00:00ZengMDPI AGFire2571-62552021-03-01421510.3390/fire4020015Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, TasmaniaTim Wardlaw0ARC Centre for Forest Value, University of Tasmania, Sandy Bay, Tasmania 7005, AustraliaNon-stand-replacing wildfires are the most common natural disturbance in the tall eucalypt forests of Tasmania, yet little is known about the conditions under which these fires burn and the effects they have on the forest. A dry lightning storm in January 2019 initiated the Riveaux Road fire. This fire burnt nearly 64,000 ha of land, including tall eucalypt forests at the Warra Supersite. At the Supersite, the passage of the fire was recorded by a suite of instruments measuring weather conditions and fluxes (carbon, water and energy), while a network of permanent plots measured vegetation change. Weather conditions in the lead-up and during the passage of the fire through the Supersite were mild—a moderate forest fire danger index. The passage of the fire through the Supersite caused a short peak in air temperature coinciding with a sharp rise in CO<sub>2</sub> emissions. Fine fuels and ground vegetation were consumed but the low intensity fire only scorched the understorey trees, which subsequently died and left the <i>Eucalyptus obliqua</i> canopy largely intact. In the aftermath of the fire, there was prolific seedling regeneration, a sustained reduction in leaf area index, and the forest switched from being a carbon sink before the fire to becoming a carbon source during the first post-fire growing season.https://www.mdpi.com/2571-6255/4/2/15WarraTERN<i>Eucalyptus obliqua</i>Riveaux Road firefire weathercarbon fluxes
spellingShingle Tim Wardlaw
Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, Tasmania
Fire
Warra
TERN
<i>Eucalyptus obliqua</i>
Riveaux Road fire
fire weather
carbon fluxes
title Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, Tasmania
title_full Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, Tasmania
title_fullStr Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, Tasmania
title_full_unstemmed Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, Tasmania
title_short Measuring a Fire. The Story of the January 2019 Fire Told from Measurements at the Warra Supersite, Tasmania
title_sort measuring a fire the story of the january 2019 fire told from measurements at the warra supersite tasmania
topic Warra
TERN
<i>Eucalyptus obliqua</i>
Riveaux Road fire
fire weather
carbon fluxes
url https://www.mdpi.com/2571-6255/4/2/15
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