Pyrocumulonimbus pair in Wollemi and Blue Mountains National Parks, 22 November 2006

Fromm, M. D.; McRae, Rick; Sharples, Jason J.; Kablick, George P.

doi:10.22499/2.6203.001

Cited by 29 publications

(38 citation statements)

References 14 publications

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“…The present paper therefore extends the study of Fromm et al (2012) by exploiting data recorded for the Grose Valley fire by an airborne multispectral line scanner (Cook et al, 2009), which provides critical insights into the wildfire dynamics. The combination of time-stamped, spatially rectified fire data and radar data (vertically aggregated convective intensity and plume-top height) permits detailed examination of the fire's development and the localised pyroconvective contributions.…”

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 84%

“…Lavoue et al, 2000;Val Martin et al, 2010). Fromm et al (2010) discuss the global climatology of pyroCb events and note in particular the small number of published studies. Since 2001 there have been at least 30 instances of significant pyroCb occurrence in Australia either demonstrated or inferred from their injection of aerosols into the upper troposphere/lower stratosphere (Tables A1 and A2).…”

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

“…The recent frequency of pyroCb occurrence in Australia necessitates ongoing monitoring and study. Fromm et al (2012) analysed pyroCb occurrence associated with two of the fires that occurred in eastern Australia during the spring and summer of 2006/2007, at locations shown in Fig. 1a.…”

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

“…1a. The so-called Grose Valley and Wollemi fires were notable due to the fact that their behaviour escalated quasi-simultaneously in the late morning rather than in the late afternoon when this typically occurs (Fromm et al, 2010).…”

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

“…Based on remotely sensed data from a range of satellites and weather radar and surface and profile data from official weather observation sites, Fromm et al (2012) concluded that the factors of significance for the development of the pyroconvection were significant departures from the norm in boundary layer temperature (as indicated by the elevated value of the continuous Haines (C-Haines) Index) and wind speed. They also noted that neither factor alone was deterministic, reflecting a general need to further scrutinise the local drivers of the extreme fire behaviour.…”

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

See 4 more Smart Citations

Linking local wildfire dynamics to pyroCb development

McRae¹,

Sharples

Fromm

2015

Nat. Hazards Earth Syst. Sci.

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Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 84%

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

Section: R H D Mcrae Et Al: Linking Local Wildfire Dynamics To Pymentioning

confidence: 99%

See 3 more Smart Citations

Linking local wildfire dynamics to pyroCb development

McRae¹,

Sharples

Fromm

2015

Nat. Hazards Earth Syst. Sci.

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Pyrocumulonimbus lightning and fire ignition on Black Saturday in southeast Australia

2017

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A number of devastating wildfires occurred in southeast Australia on 7 February 2009, colloquially known as Black Saturday. Atmospheric responses to this extreme fire event are investigated here with a focus on convective processes associated with fire activity (i.e., pyroconvection). We examine six different fire complexes on Black Saturday, finding three clearly distinct pyrocumulonimbus storms, the largest of which reached heights of 15 km on that day and generated hundreds of lightning strokes. The first lightning stroke was recorded near the largest fire complex 5 h after fire ignition. One of the pyrocumulonimbus storms was initiated close to midnight due to mesoscale influences, consistent with extreme fire behavior observed at that time for that particular fire. As another example of fire‐atmosphere interactions, a fire that started late on Black Saturday is examined in relation to ignition caused by pyrogenic lightning, with implications for understanding the maximum rate of spread of a wildfire. Results are discussed in relation to another pyrocumulonimbus event associated with the 2003 Canberra fires. Our findings are intended to provide a greater understanding of pyroconvection and fire‐atmosphere feedback processes, as well as help enhance wildfire response capabilities. We also demonstrate the potential for using lightning, radar, and satellite remote sensing in combination with thermodynamic analyses as well as synoptic and mesoscale dynamics to provide enhanced real‐time guidance for dangerous fire conditions associated with pyroconvection, as well as for the risk of new fire ignitions from pyrogenic lightning.

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Informed Multi-scale Approach Applied to the British Columbia Fires of Late Summer 2017

Reisner

Josephson

Gorkowski

et al. 2022

Preprint

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Pyrocumulonimbus clouds have a complex origin depending on fire dynamics and meteorological conditions. When a pyrocumulonimbus (PyroCb) cloud formation develops and is maintained over a period of time, it can inject significant aerosol into the troposphere and lower stratosphere, resulting in longer term (months to years) climate cooling effects. In this work we investigate the British Columbia and northern Washington wildfires on August 12-13, 2017 using a multi-scale simulation framework. We use the output of a physics based wildfire model (FIRETEC) with parameterized energy, particle, and gas emissions to drive the upper atmospheric aerosol mass injection within a regional cloud resolving model (HIGRAD). We demonstrate that vertical motions produced by latent heat release of the condensation of ice and cloud particles within the PyroCbs induce another 5 km of lifting of the simulated aerosol plume. Primary black carbon and organic aerosols alone may not be enough to explain the observed aerosol burden, thus we show that dust and ash particles can enhance lofted aerosol mass. Additionally, we show that semi volatile organic gases emitted by the fires eventually condense, further increasing the aerosol burden. A simulation with all aerosol mechanisms active, driven by the observed fuel load and environmental conditions, reasonably reproduces an aerosol profile inferred from observational data.

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Pyrocumulonimbus pair in Wollemi and Blue Mountains National Parks, 22 November 2006

Cited by 29 publications

References 14 publications

Linking local wildfire dynamics to pyroCb development

Linking local wildfire dynamics to pyroCb development

Pyrocumulonimbus lightning and fire ignition on Black Saturday in southeast Australia

Informed Multi-scale Approach Applied to the British Columbia Fires of Late Summer 2017

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