Key Takeaways
- In 2023, global wildfires emitted approximately 2.8 billion metric tons of CO2 equivalent
- Siberia's 2021 wildfires burned 18 million hectares, releasing 500 million tons of CO2
- Boreal forests accounted for 60% of global fire carbon emissions in 2021
- Between 2001 and 2023, the Amazon rainforest experienced over 1.2 million fire alerts detected by MODIS satellites
- From 2010-2020, Australia saw 25 major wildfire events affecting 80 million hectares cumulatively
- Europe recorded 1,200 wildfires in summer 2022, burning 700,000 hectares
- California's 2020 wildfire season burned 4.3 million acres, the largest on record for the state
- Global wildfire burned area averaged 350 million hectares annually from 2003-2022
- Global fire radiative power increased by 15% from 2001-2021, indicating hotter fires
- In 2022, wildfires caused $100 billion in global economic damages
- Wildfires in 2023 displaced 500,000 people worldwide, primarily in Canada and Greece
- Australia's Black Summer fires (2019-2020) killed or injured 3 billion animals
- Global fire season lengthened by 20 days on average from 1979-2020
- Projections indicate 30% increase in global burned area by 2050 under RCP4.5
- Fire weather index globally increased 25% since 1970
The blog post details alarming recent global wildfire trends in emissions, destruction, and intensity.
Burned Area and Severity
- California's 2020 wildfire season burned 4.3 million acres, the largest on record for the state
- Global wildfire burned area averaged 350 million hectares annually from 2003-2022
- Global fire radiative power increased by 15% from 2001-2021, indicating hotter fires
- In 2020, global wildfires burned 170 million hectares, 50% above the 2001-2019 average
- Canada’s 2023 wildfires burned 18.5 million hectares, largest in modern history
- Australia's fire-prone areas expanded 50% from 1900-2020 due to land use
- Global burned area in croplands: 4% of total, but rising with drought
- Siberia fires 2019-2023 averaged 10 million ha/year
- Tropical deforestation fires account for 25% of global tree cover loss
- Boreal fire severity index up 40% from 1980-2020
- Fire-induced tree mortality in western US doubled since 1984
- Wildfires destroy 20% of global peatlands every decade
- Global fire patch size increased 20% since 2000
- Bolivia 2024 fires burned 7 million ha in Chiquitania
- France 2022 Gironde fires burned 20,000 ha, largest since 1940s
- Post-fire erosion increases sediment yield 10-100x
- Fire intensity doubled in Iberian Peninsula 1970-2017
- Global burned fraction stable at 3.7% land area/year
- Fire refugia decreased 25% in severity, aiding recovery
- Zambia 2023 fires burned 1 million ha of forests
- Oregon 2020 fires burned 1 million acres, 4 deaths
- Fire-induced biodiversity loss: 15% species decline in hotspots
- UK 2022 fires burned 5,000 ha, record for country
- Fire escape rate from suppression: 2-5% become megafires
- Finland 2018 fires burned 1,000 ha
- Fire perimeter growth rate: 1-5 km/day average
Burned Area and Severity Interpretation
Carbon Emissions and Climate Impact
- In 2023, global wildfires emitted approximately 2.8 billion metric tons of CO2 equivalent
- Siberia's 2021 wildfires burned 18 million hectares, releasing 500 million tons of CO2
- Boreal forests accounted for 60% of global fire carbon emissions in 2021
- Indonesia's peatland fires in 2019 emitted 1.5 billion tons of CO2, equivalent to India's annual emissions
- Wildfires contributed 8% to global anthropogenic CO2 emissions in 2023
- In 2021, global wildfires released 1.8 PgC, highest since 2007
- Northern Hemisphere fire emissions doubled from 2001-2020
- Peat fires in Indonesia contribute 40% of tropical fire emissions annually
- Europe’s 2022 wildfires emitted 100 MtCO2, equivalent to 20% of EU emissions
- 80% of global fire emissions from 10% of burned area (high-intensity fires)
- CO emissions from fires: 300 Tg/year average 2010-2020
- Black carbon from fires: 10 Tg/year, warming effect 0.1 W/m²
- Southeast Asia fires 2015 emitted 1.6 GtCO2
- Global NOx emissions from fires: 5 TgN/year
- CH4 emissions from fires: 15 Tg/year average
- OC emissions from biomass burning: 40 Tg/year
- Smoke plume heights average 5km, spreading globally
- Global fire CO2 uptake deficit: 1.3 PgC/year 2000-2019
- Fire aerosol radiative forcing: -0.1 to +0.2 W/m² net
- NMHC emissions from fires: 20 Tg/year
- Pyrogenic mercury release: 600 Mg/year from fires
- Fire-induced soil carbon loss: 200 TgC/year
- Fire volatile organic compounds: 100 Tg/year emissions
- Fire nutrient release: 5 TgN/year to atmosphere
Carbon Emissions and Climate Impact Interpretation
Economic and Human Costs
- In 2022, wildfires caused $100 billion in global economic damages
- Wildfires in 2023 displaced 500,000 people worldwide, primarily in Canada and Greece
- Australia's Black Summer fires (2019-2020) killed or injured 3 billion animals
- US wildfires cost $20 billion in suppression and damages in 2022 alone
- Chile's 2024 wildfires burned 50,000 hectares, killing 130 people
- US federal wildfire suppression costs reached $3.4 billion in 2021
- Canada’s 2016 Fort McMurray fire cost $9.9 billion CAD in damages
- Greece 2021 fires burned 100,000 ha, evacuating 20,000 people
- Wildfire smoke caused 300,000 premature deaths globally in 2020
- Portugal 2017 fires killed 66, burned 500,000 ha
- Maui 2023 fire killed 100+, cost $5 billion
- Economic loss from Australian 2019-20 fires: AUD 100 billion
- PM2.5 from fires caused $200 billion health costs in 2019-2021
- Canada evacuations 2023: 200,000 people from wildfires
- Insurance claims for wildfires globally doubled 2010-2020
- Wildfire suppression effectiveness: 95% containment rate in US, cost $2B/year
- Post-fire landslides risk up 5x for 2 years
- Restoration costs post-fire: $10,000/ha average
- Wildfire property damage US: $15B in 2023
- Global fire management spending: $10B/year
- Timber loss from fires: 50 million m³/year globally
- Hawaii fire suppression costs 2023: $200 million
- Global firefighter fatalities: 200/year average
Economic and Human Costs Interpretation
Fire Incidence and Frequency
- Between 2001 and 2023, the Amazon rainforest experienced over 1.2 million fire alerts detected by MODIS satellites
- From 2010-2020, Australia saw 25 major wildfire events affecting 80 million hectares cumulatively
- Europe recorded 1,200 wildfires in summer 2022, burning 700,000 hectares
- Global wildfire frequency rose 20% from 1998-2015 per GFED data
- From 2000-2020, Africa’s savanna fires burned 1.5 billion hectares annually on average
- Mediterranean basin wildfires increased 30% in frequency since 1980
- Global hotspots include Amazon (15%), Boreal (25%), and Southeast Asia (10%) of emissions
- 2023 global fire detections by VIIRS: 4.2 million, up 10% from 2022
- US West wildfires burned 7 million acres in 2020, 128% above average
- Amazon fire season starts 20 days earlier since 2001
- Global agricultural fires burn 400 million ha/year, 70% of total area
- Russia 2021 fires detected 1.5 million hotspots
- Spain 2022 fires burned 300,000 ha amid heatwave
- US fire ignitions: 60% human-caused, 40% lightning
- Africa fire pixels: 10 million/day peak season
- Turkey 2021 fires burned 170,000 ha, 10 deaths
- Brazil 2019 fires: 30,000 hotspots in Amazon
- Italy 2021 fires burned 10,000 ha amid drought
- Human expansion into wildlands increases fire starts 35%
- Sweden 2018 fires burned 25,000 ha, unusual for Scandinavia
- Global lightning fires: 10% of total ignitions
- Congo Basin fires doubled 2000-2020, 500,000 ha/year
- Venezuela 2019 fires burned 200,000 ha in Gran Sabana
- South Africa 2021 fires burned Table Mountain 1,000 ha
- Angola fires peak at 2 million ha/day in August
- Namibia grassland fires burn 80% of area annually
Fire Incidence and Frequency Interpretation
Trends and Projections
- Global fire season lengthened by 20 days on average from 1979-2020
- Projections indicate 30% increase in global burned area by 2050 under RCP4.5
- Fire weather index globally increased 25% since 1970
- Fire return interval in California chaparral shortened from 30 to 15 years
- Global fire carbon emissions projected to rise 50% by 2100 under high emissions
- Global vapor pressure deficit rose 10%, fueling 15% more fire spread
- Projected global fire weather days increase 2-6x by 2100
- Global fire projections: +14% burned area per 1°C warming
- By 2050, fire risk high in 40% more land area
- Fire season extension: 30% in Mediterranean, 50% in Australia
- Climate models predict 50% more extreme fire weather by 2100
- By 2030, fire costs could reach $300B/year globally
- Drought code threshold exceeded 50% more days since 1980
- Projections: Mediterranean burned area +50% by 2050
- Fire danger rating systems predict 80% of large fires
- Climate attribution: 30% of recent fire extremes to warming
- Long-term fire trend: +9% extreme fire weather globally
- Future projections: Boreal fires +50% by 2050
Trends and Projections Interpretation
Sources & References
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