International Journal of Wildland Fire最新文献_第10页

IX International Conference on Forest Fire Research and 17th International Wildland Fire Safety Summit: introduction to special issue (Part 2) 九国际森林火灾研究会议暨第十七届国际野外消防安全峰会：特刊介绍（下）

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-03-28 DOI: 10.1071/wf23037

M. Almeida, D. Viegas, L. Ribeiro

引用次数: 2

Atmospheric turbulent structures and fire sweeps during shrub fires and implications for flaming zone behaviour 灌木火灾期间的大气湍流结构和火灾波及以及对燃烧区行为的影响

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-02-22 DOI: 10.1071/wf22100

M. Katurji, Bob Noonan, Jiawei Zhang, Andres Valencia, Benjamin Shumacher, J. Kerr, T. Strand, G. Pearce, P. Zawar-Reza

{"title":"Atmospheric turbulent structures and fire sweeps during shrub fires and implications for flaming zone behaviour","authors":"M. Katurji, Bob Noonan, Jiawei Zhang, Andres Valencia, Benjamin Shumacher, J. Kerr, T. Strand, G. Pearce, P. Zawar-Reza","doi":"10.1071/wf22100","DOIUrl":"https://doi.org/10.1071/wf22100","url":null,"abstract":"Background Wildfires propagate through vegetation exhibiting complex spread patterns modulated by ambient atmospheric wind turbulence. Wind gusts at the fire-front extend and intensify flames causing direct convective heating towards unburnt fuels resulting in rapid acceleration of spread. Aims To characterise ambient and fire turbulence over gorse shrub and explore how this contributes to fire behaviour. Methods Six experimental burns were carried out in Rakaia, New Zealand under varying meteorological conditions. The ignition process ensured a fire-line propagating through dense gorse bush (1 m high). Two 30-m sonic anemometer towers measured turbulent wind velocity at six different levels above the ground. Visible imagery was captured by cameras mounted on uncrewed aerial vehicles at 200 m AGL. Key results Using wavelet decomposition, we identified different turbulent time scales that varied between 1 and 128 s relative to height above vegetation. Quadrant analysis identified statistical distributions of atmospheric sweeps (downbursts of turbulence towards vegetation) with sustained events emanating from above the vegetation canopy and impinging at the surface with time scales up to 10 s. Conclusions Image velocimetry enabled tracking of ‘fire sweeps’ and characterised for the first time their lifetime and dynamics in comparison with overlying atmospheric turbulent structures. Implications This methodology can provide a comprehensive toolkit when investigating coupled atmosphere–fire interactions.","PeriodicalId":14464,"journal":{"name":"International Journal of Wildland Fire","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42192792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Corrigendum to: Atmospheric turbulent structures and fire sweeps during shrub fires and implications for flaming zone behaviour 勘误表:灌木火灾期间的大气湍流结构和火灾横扫以及对火区行为的影响

3区农林科学

International Journal of Wildland Fire Pub Date : 2023-02-22 DOI: 10.1071/wf22100_co

Marwan Katurji, Bob Noonan, Jiawei Zhang, Andres Valencia, Benjamin Schumacher, Jessica Kerr, Tara Strand, Grant Pearce, Peyman Zawar-Reza

{"title":"Corrigendum to: Atmospheric turbulent structures and fire sweeps during shrub fires and implications for flaming zone behaviour","authors":"Marwan Katurji, Bob Noonan, Jiawei Zhang, Andres Valencia, Benjamin Schumacher, Jessica Kerr, Tara Strand, Grant Pearce, Peyman Zawar-Reza","doi":"10.1071/wf22100_co","DOIUrl":"https://doi.org/10.1071/wf22100_co","url":null,"abstract":"<sec> Background Wildfires propagate through vegetation exhibiting complex spread patterns modulated by ambient atmospheric wind turbulence. Wind gusts at the fire-front extend and intensify flames causing direct convective heating towards unburnt fuels resulting in rapid acceleration of spread. </sec> <sec> Aims To characterise ambient and fire turbulence over gorse shrub and explore how this contributes to fire behaviour. </sec> <sec> Methods Six experimental burns were carried out in Rakaia, New Zealand under varying meteorological conditions. The ignition process ensured a fire-line propagating through dense gorse bush (1&#x2009;m high). Two 30-m sonic anemometer towers measured turbulent wind velocity at six different levels above the ground. Visible imagery was captured by cameras mounted on uncrewed aerial vehicles at 200&#x2009;m AGL. </sec> <sec> Key results Using wavelet decomposition, we identified different turbulent time scales that varied between 1 and 128&#x2009;s relative to height above vegetation. Quadrant analysis identified statistical distributions of atmospheric sweeps (downbursts of turbulence towards vegetation) with sustained events emanating from above the vegetation canopy and impinging at the surface with time scales up to 10&#x2009;s. </sec> <sec> Conclusions Image velocimetry enabled tracking of &#x2018;fire sweeps&#x2019; and characterised for the first time their lifetime and dynamics in comparison with overlying atmospheric turbulent structures. </sec> <sec> Implications This methodology can provide a comprehensive toolkit when investigating coupled atmosphere&#x2013;fire interactions. </sec>","PeriodicalId":14464,"journal":{"name":"International Journal of Wildland Fire","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136196217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to: Altered mixed-severity fire regime has homogenised montane forests of Jasper National Park 更正:改变的混合严重程度的火灾制度使贾斯珀国家公园的山地森林同质化

3区农林科学

International Journal of Wildland Fire Pub Date : 2023-02-22 DOI: 10.1071/wf15048_c1

Raphaël D. Chavardès, Lori D. Daniels

{"title":"Corrigendum to: Altered mixed-severity fire regime has homogenised montane forests of Jasper National Park","authors":"Raphaël D. Chavardès, Lori D. Daniels","doi":"10.1071/wf15048_c1","DOIUrl":"https://doi.org/10.1071/wf15048_c1","url":null,"abstract":"Fire suppression has altered the historical mixed-severity fire regime and homogenised forest structures in Jasper National Park, Canada. We used dendrochronology to reconstruct fire history and assess forest dynamics at 29 sites in the montane forests. Based on fire scars and even-aged post-fire cohorts, we determined 18 sites had mixed-severity fire histories through time, and 11 sites had evidence of high-severity fires only &#x2013; yielding a mixed-severity fire regime for the study area. Lodgepole pine, hybrid spruce and Douglas-fir established simultaneously after low- and high-severity fires. Regardless of fire history, forest canopies were mixed in composition and subcanopies were strongly dominated by shade-tolerant hybrid spruce. Despite their size, subcanopy trees were similar in age to the canopy trees. Current stand composition and age structures largely reflect the effects of high-severity fires that burned ~110 years ago at 18 of 29 sites. In the absence of fires after 1905, forests have matured simultaneously, homogenising the landscape and resulting in forest structures that are more conducive to high-severity fire than are fires of a range of severities. Proactive fire management is justified to restore fire as a vital ecological process and promote forest resilience by countering the effects of a century of fire suppression.","PeriodicalId":14464,"journal":{"name":"International Journal of Wildland Fire","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136195920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Special issue editorial team 特刊编辑团队

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-01-24 DOI: 10.1071/wfv32n1edboard

引用次数: 0

IX International Conference on Forest Fire Research and 17th International Wildland Fire Safety Summit: introduction to special issue (Part 1) 第九届国际森林火灾研究会议暨第十七届国际野地火灾安全高峰论坛特刊简介(上)

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-01-24 DOI: 10.1071/wf23003

D. Viegas, L. Ribeiro

引用次数: 4

Crown fire initiation of a thunderstorm 雷雨引起的冠火

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-01-01 DOI: 10.1071/wf21146

N. McCarthy, H. McGowan, A. Guyot, A. Dowdy, A. Sturgess, Benjamin I. Twomey

引用次数: 0

Consistent, high-accuracy mapping of daily and sub-daily wildfire growth with satellite observations 与卫星观测一致的、高精度的日和次日野火增长制图

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-01-01 DOI: 10.1071/wf22048

C. McClure, N. Pavlovic, Shihming Huang, M. Chaveste, Ningxin Wang

引用次数: 0

A satellite-based burned area dataset for the northern boreal region from 1982 to 2020 1982 - 2020年北方寒带地区基于卫星的烧毁面积数据集

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-01-01 DOI: 10.1071/wf22102

J. Moreno-Ruiz, J. García-Lázaro, M. Arbelo, P. Hernández-Leal

引用次数: 1

Future regional increases in simultaneous large Western USA wildfires 未来美国西部同时发生大型野火的区域增加

IF 3.1 3区农林科学

International Journal of Wildland Fire Pub Date : 2023-01-01 DOI: 10.1071/wf22107

S. McGinnis, Lee Kessenich, L. Mearns, Alison Cullen, Harry Podschwit, M. Bukovsky

引用次数: 0