Indigenous knowledge to be used in future Australian bushfire research

Australia’s National Aboriginal and Islander Day Observance Committee (NAIDOC) Week started on July 7 with a commitment from bushfire researchers at the University of New South Wales (UNSW) in Canberra City.

The university has previously published numerous articles of landmark research on bushfires, including creating the world’s first extreme bushfire warning system, developing the first fire-retardant paint that passes the stringent BAL-40 test, and studying the long-lasting impacts of Australia’s “Black Summer” Bushfires.

University researchers have made a new commitment to future bushfire projects, vowing to incorporate more Indigenous practices.

“UNSW Canberra researchers are working to better incorporate Indigenous practices and understandings of fire in bushfire management, to better prepare for an increasingly uncertain future thanks to climate change,” a press release from the university said.

bushfires

Similar to the practices of various Native American tribes, fire played an intrinsic role in the lives of Australia’s Indigenous communities of Aboriginal and Torres Strait Islander peoples for countless generations, and is still in use today.

Small controlled fires help them hunt, clear pathways through bush, and regenerate vegetation, according to The Nature Conservancy. “Cool Burns” have recently made a comeback after centuries of Euro-Australian suppression diminished the practice, caused by early colonizers’ view of fire as only a threat rather than a land-management practice. The loss of managed fire on Australia’s landscape, along with climate change, is a direct contributor to the severe bushfires that have burned the country since.

UNSW Bushfire Director Jason Sharples, a member of the Aboriginal Bundjalung people, said Indigenous fire knowledge adds needed depth to modern bushfire research.

“Local Indigenous people would know the land was ready for a burn when certain environmental indicators aligned, for example, when wattle flowers fell and when certain cloud formations were observed over prominent mountains,” Sharples said.

“Essentially, Country told them the right time to burn, and the people would offer fire as a gift back to Country. From a Western scientific perspective, this aligns with selecting the correct season based on the native flora, and only burning on a day when temperature and relative humidity conditions are within an acceptable range, as indicated by the cloud formations.”

UNSW is already working on two projects with the commitment to Indigenous practices in mind. One of the projects is studying how ridgelines, which correspond closely with Indigenous Songlines, cause unique wind patterns and influence fire spread. The other project compares modern bushfire regimes in southeast Australia with traditional fire regimes, Indigenous calendars, and cultural fire lore to better understand how climate change will affect future bushfires.

The university’s commitment pairs well with this year’s NAIDOC theme: “Keep the Fire Burning! Blak, Loud and Proud.” The theme conveys the strength and vitality of the nation’s Indigenous cultures which have stayed alive for generations despite historic and ongoing oppression and persecution.

“NAIDOC Week is a good opportunity to remind ourselves of the importance of promoting the cultural practices and learnings of Indigenous Australians and this will remain central to the work we do within UNSW Bushfire,” Sharples said.

 

 

World’s largest tropical wetland burned this year

Record-breaking wildfires between January and June burned an ecological foothold — and biodiversity haven — spanning across Brazil, Bolivia, and Paraguay this year, just four years after similar fires burned 13,300 acres of the preserve.

The Pantanal is considered the world’s largest tropical wetland area, the world’s largest flooded grasslands, and one of the most important areas of freshwater in the world.

NASA captured some of the intense fires’ burn scars in satellite imagery.

“Fire season in southern Brazil usually starts in July and peaks in August and September,” NASA said. “The false-color images emphasize the burn scars (brown) from several of the fires. Unburned vegetation is green. Near- and short-wave infrared bands help penetrate some of the smoke to reveal the hot spots associated with active fires, which appear orange.”

Pantanal fires
Pantanal fires June 2024

The repeated fires have left the environment in a state of constant recovery — and nearby communities are struggling.

“We were just trying to recover from the 2020 fire, which devastated our Pantanal. We had not fully recovered and now we are facing this again,” said a volunteer firefighter with the Baia Negra Environmental Protection Area’s Association of Women Producers.

A recent report from MapBiomas Brazil, a collaborative initiative including NGOs, universities, and technology companies, sheds light on a major cause of the fires: surface water loss.

Edge effects
Edge effects on the native vegetation and continuous habitat — including exposure to wind and solar radiation, susceptibility to fire, increased predation rates, and

The Pantanal is the biome in Brazil that has dried up the most between 1985 and 2023. The report said annual water surface for the area last year was just under 944,000 acres — only 2 percent of the wetland biome was covered by water. The total is reportedly 61 percent under the historical average. The area was 50 percent drier in 2023 than it was in 2018 when the area’s last major flood happened.

“In 2024, we didn’t have a flood peak,” said Eduardo Rosa with  MapBiomas. “The year has seen a peak drought, which should last until September. The Pantanal in extreme drought is already facing fires that are difficult to control.”

The report also found that the entire Amazon region suffered a severe drought with a decrease of 8.2 million acres of water surface.

Up to 25% of Brazil’s native vegetation may be degraded

A new platform from the MapBiomas network shows that between 1986 and 2021 Brazil had between 11 and 25 percent of its native vegetation susceptible to degradation. This corresponds to an area ranging from 60.3 million hectares to 135 million hectares.

Fire effects over time
Visualized fire effects over 7 years, resulting from a single burn or multiple burns.

About 64 percent of Brazil — more than half the country — is covered by native vegetation. The beta version of MapBiomas’ degradation vectors platform makes it possible to generate unprecedented scenarios of the impact of factors that can cause degradation on native vegetation across  Brazil.

“This is the first time that degradation can be assessed in a broader way and in all Brazilian biomes,” says Tasso Azevedo, general coordinator of MapBiomas. “But we know that this degradation process occurs in other types of cover, such as agriculture and pasture, as well as soils and water, where we also intend to advance with this information in MapBiomas in the coming years.”

  ➤ View the main highlights [PDF] of the Degradation module

The degradation vectors considered by the MapBiomas team in this first edition of the platform include the size and isolation of the native vegetation fragments, their edge areas, the frequency of fire and the time since the last burn, as well as the age of the secondary vegetation.

Pantanal: fire as a factor in degradation

In the Pantanal, the degraded area can vary from 800,000 hectares (6.8 percent) to 2.1 million hectares (almost 19 percent). Although it is a biome that coexists with fire, the incidence of fires in the last five years has meant that 9 percent of the Pantanal’s forest formations, which are fire-sensitive areas, have been damaged.

Eduardo Rosa with the MapBiomas’ Pantanal team says some of the vectors of degradation in the Pantanal beyond this analysis must consider the entire biome’s surroundings, since all the rivers that naturally irrigate the Pantanal plain are born in plateau areas. “The removal of native vegetation for agricultural and livestock expansion unprotects the soil and interferes with the distribution of water and sediment. The quantity and quality of water that reaches the plains also depends on dams and hydroelectric plants that alter the natural flow of water,” he says. “Climate issues relating to rainfall and temperature regulate droughts and floods, and the increase in periods of drought has hampered the resilience of the Pantanal ecosystem.”

 

 

Oregon State research team pursuing “burn to learn”

Fire science researchers at Oregon State University launched  a new project on May 10 to study how embers from homes and other buildings spread to nearby structures. “Our motto is burn to learn,” said OSU full-time research assistant Adarsh Verma. “So we are burning stuff to learn more about fire and how it’s going to spread.”

From May 10 to 16, the research team will burn outbuildings in a field and  examine the effects that structures of different sizes have on the firebrands — the embers and coals produced by a fire. They’ll analyze the numbers of embers produced, the distances they’re lofted on the breeze, and embers’ potential for new starts on adjacent buildings or other fuels.

OSU sheds for burning
OSU sheds slated for burning — photo from video ©Albert James / KEZI

Research assistant Jonathan Carter told Albert James with KEZI-TV that researchers are tracking the number of embers generated by flames and how hot embers get. Firebrands must hit a minimum temperature before ignition occurs in adjacent fuels.

Undergraduate research assistant Jonathan Carter and research faculty member Deepak Sharma on the faculty carry a water barrel at the test site.
Undergraduate research assistant Jonathan Carter and research faculty member Deepak Sharma on the faculty carry a water barrel at the test site. Photo from video ©Albert James / KEZI
Burning shed close
Flames rip through the 6-foot shed. Photo from video ©Albert James / KEZI.
The project kicked off on Friday, and the research team members hope to learn from the experience for future planning. “As we increase the size of the structure, the number of embers and their spread will increase,” Sharma said. “They will spread over larger areas and the number of firebrands will increase.” He said their results could guide structure design in residential areas. He hopes to look into additional factors that could affect fire behavior, including wind and home building materials.

The KEZI broadcast with Albert’s video is online [HERE].

Fire science researchers at Oregon State University launched  a new project on May 10 to study how embers from homes and other buildings spread to nearby structures. “Our motto is burn to learn,” said OSU full-time research assistant Adarsh Verma. “So we are burning stuff to learn more about fire and how it’s going to spread.”

Climate change will make wildfires worse, even in areas that don’t have wildfires today

Yet another destination known for its skiing and snowy winters will be forced to contend with growing wildfire severity and frequency.

The Alps, Europe’s largest mountain range and a world-renowned skiing destination, and the Alpine Foreland, a deep trough in southern Germany at the edge of the Alps, have both enjoyed minimal wildfire danger thanks to abundant winter snowfall and temperate summer conditions. But that will change by 2040.

A study published in Natural Hazards and Earth System Sciences (NHESS) used climate models to forecast fire risk for the two locations and others from 1980 to 2099. Researcher Julia Miller used the Canadian Forest Fire Weather Index (FWI) as a fire danger indicator.

The research forecasted a likely increase in wildfire danger in temperate areas through the 21st century, with fire danger increasing to high even in regions where it is very low today. The results displayed a continual trend of worsening wildfire danger in the Alps and Alpine Foreland, with the climate change trend exceeding natural variability in the late 2040s. The excess would likely have happened earlier if not for the area’s current low wildfire danger.

These areas are expected to see what’s today considered a “100-year” fire event every 30 years by 2050 and every 10 years by the end of the century.

Severe debris flow in Ascona, Switzerland, in summer 1997, five months after a forest fire. Photo: Lorenza Re, Forest Service Canton Ticino
Severe debris flow in Ascona, Switzerland, in summer 1997, five months after a forest fire — photo ©1997 Lorenza Re, Forest Service Canton Ticino

“Alterations in these variables are projected to more than double the frequency of occurrence of extreme fire weather until the end of the 21st century … and increase the duration, severity, and spatial extent of fires,” Miller said. “Due to climate change, fire weather and hence the likelihood of fire events are projected to increase in several regions of the world – including historically less fire-prone areas – in the future.”

A study posted on PreventionWeb indicates that fires in the Alps will increase because of growing intensity of drought periods and heat waves — and the increasing fire hazard resulting from rural abandonment and more recreational activities.

Alpine communities, such as the previously mentioned Canadian community of Whistler, may see this as a hard pill to swallow. The lack of historical fires in the area means local people also lack an established “culture” for living with fires, according to Switzerland’s University of Bern. Researchers there are currently working to identify the wildfire risk awareness of communities throughout the canton of Bern and determine the best approaches for specific groups in the area.

“Based on scientific findings, the project aims to develop optimized and/or new communication strategies and materials for implementation,” the university said. “These can promote behavioral changes regarding forest fire risks, thus helping to prevent such fires.”

Humans are by far the main cause of wildfires

Every year in the U.S., billions of dollars are spent on wildfire suppression and risk reduction. The five federal fire agencies — Forest Service, Bureau of Land Management, National Park Service, Bureau of Indian Affairs, and Fish & Wildlife Service — spent a combined $4.4 billion (2021) and $3.5 billion (2022) in wildfire suppression alone, according to the National Interagency Fire Center (NIFC). The USFS announced in February that it would be investing nearly $500 million more in its “Confronting the Wildfire Crisis” 10-year strategy focusing on 21 priority landscapes across the West.

Despite the numerous projects and strategies billions in taxpayer monies have funded, one thing hasn’t changed over the past decade: Humans are still the main cause of wildfires — and numbers have worsened since 2014.

Air quality publication HouseFresh analyzed NIFC data from 2023 and ranked the causes of wildfires by number of occurrences. Of the recorded fires, 72.6 percent were directly caused by humans.

The bulk of last year’s wildfires were caused by debris burning and open burning, resulting in 1,302 wildfires. That is an increase from the 1,120 fires started by debris and open burning in 2022. Equipment and vehicle use, power generation/transmission/distribution, and arson were the next listed causes of wildfires in 2023 at 507, 390, and 364 respectively.

“The balance between human and natural fires has almost reversed since 2014, although the trend has not been smooth,” the HouseFresh report said. “The proportion of human-caused wildfires grew significantly in 2015, 2016 and 2020, peaking at 77.2 percent in 2020.”

How People Start Wildfires
This image is licensed under the Creative Commons Attribution-Share Alike 4.0 International License ::: creativecommons.org/licenses/by-sa/4.0

To no one’s surprise, California leads the nation in number of acres burned by wildfires. The state totaled 344,878 acres burned, followed by Alaska at 295,105 acres and Arizona at 218,286 acres. Arizona led the nation, however, in the biggest increase in acres from 147,553 acres in 2022 to 218,286 acres in 2023. Southeast Fairbanks County in Alaska was the leading county in acres burned in 2023 at 141,399 acres.

“Alaska suffered the second-most land damage in 2023, despite the largest annual reduction in acres — down 2,818,744 acres from 3,113,849 in the previous, record-breaking year,” the report says. “Unfortunately, many places where fires burn are hard to reach; at the same time, permafrost and surface fuels make Alaska’s wildfires particularly pollutive.”

~ The full report’s posted on the HouseFresh website.

Every year in the U.S., billions of dollars are spent on wildfire suppression and risk reduction. The five federal fire agencies — Forest Service, Bureau of Land Management, National Park Service, Bureau of Indian Affairs, and Fish & Wildlife Service — spent a combined $4.4 billion (2021) and $3.5 billion (2022) in wildfire suppression alone, according to the National Interagency Fire Center (NIFC). The USFS announced in February that it would be investing nearly $500 million more in its “Confronting the Wildfire Crisis” 10-year strategy focusing on 21 priority landscapes across the West.

Canadian conservationists push emission limits for wildfire reduction

Groundbreaking research last year found around 37 percent of burned land across North America can be traced directly back to carbon emissions from 88 major fossil fuel producers and cement manufacturers. Now, environmentalists in Canada are using the research to push for change.

The study, published last May in the journal Environmental Research Letters, used climate, burned area, and global energy balance models to determine what contribution carbon emissions had on increases in vapor pressure deficit (VPD), which partially caused a rise in burned forest area in the United States and Canada. The research concluded, along with the fossil fuel link, that carbon producer emissions contributed to 48 percent of long-term VPD rise between 1901 and 2021.

canada smoke reaches Europe
Smoke from fires in Canada traversed the Atlantic Ocean and drifted over European countries including Portugal and Spain. ~ NASA image of the day for June 27, 2023

“As loss and damage from these hazards mounts, this research can inform public and legal dialogues regarding the responsibility carbon producers bear for addressing past, present, and future climate risks associated with fires and drought in the western U.S. and southwestern Canada,”  researchers said. Nearly a year later, Climate Action Network Canada advocates are using that research to advocate a new push for nationwide carbon emission limits.

June 26, 2023 Canada smoke
June 26, 2023 Canada smoke

“To cap wildfires and other climate impacts, the government must cap oil and gas emissions,” said Climate Action Network Executive Director Caroline Brouillette. “Other sectors and everyday Canadians are reducing their emissions, while for decades the oil and gas sector has increased its pollution and pushed back against every form of accountability. Further delay benefits only oil and gas executives’ pocketbooks and climate-denying politicians.”

A survey of nearly 2,000 Canadians found that nearly two-thirds of residents support a greenhouse gas emissions cap for the oil and gas industry. The survey also found that support for an emissions cap is the highest among Canadians aged 60 or older at 71 percent and only 18 percent of Canadians said the industries shouldn’t be required to limit emissions.

Such a cap would prevent 4,800 premature Canadian deaths and yield $45 billion in economic benefits, according to research projections from the Canadian Association of Physicians for the Environment. The results were attributed to projected reductions in air pollution — specifically in nitrogen dioxide, fine particulate matter, and annual ozone — if oil and gas industry emissions are capped at 45 percent below 2005 levels by 2023, which is Canada’s national climate target.

~ Full statement from Climate Action Network Canada.