Abstract
Wildfires burn approximately 3%–4% of the global land area annually, resulting in massive emissions of greenhouse gases and air pollutants. Over the past two decades, there has been a declining trend in both global burned area and wildfire emissions. This trend is largely attributed to a decrease in wildfire activity in Africa, which accounts for a substantial portion of the total burned area and emissions. However, the northern high-latitude regions of Asia and North America have witnessed substantial interannual variability in wildfire activity, with several severe events occurring in recent years. Climate plays a pivotal role in influencing wildfire activity and has led to more wildfires in high-latitude regions. These wildfires pose significant threats to climate, ecosystems, and human health. Given recent changes in wildfire patterns and their impacts, it is critical to understand the contributors of wildfires, focus on deteriorating high-latitude areas, and address health risks in poorly managed areas to mitigate wildfire effects.
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Abades S R, Gaxiola A, Marquet P A (2014). Fire, percolation thresholds and the savanna forest transition: a neutral model approach. Journal of Ecology, 102(6): 1386–1393
Abatzoglou J T, Williams A P (2016). Impact of anthropogenic climate change on wildfire across western US forests. Proceedings of the National Academy of Sciences of the United States of America, 113(42): 11770–11775
Abdo M, Ward I, O’Dell K, Ford B, Pierce J R, Fischer E V, Crooks J L (2019). Impact of wildfire smoke on adverse pregnancy outcomes in Colorado, 2007–2015. International Journal of Environmental Research and Public Health, 16(19): 3720
Alló M, Loureiro M L (2020). Assessing preferences for wildfire prevention policies in Spain. Forest Policy and Economics, 115: 102145
AMAP 2222)). AMAP Assessment 2021: Impacts of Short-lived Climate Forcers on Arctic Climate, Air Quality, and Human Health. Tromso: Arctic Monitoring and Assessment Programme (AMAP)
Andela N, Van Der Werf G R (2014). Recent trends in African fires driven by cropland expansion and El Nino to La Nina transition. Nature Climate Change, 4(9): 791–795
Arora V K, Melton J R (2018). Reduction in global area burned and wildfire emissions since 1930s enhances carbon uptake by land. Nature Communications, 9(1): 1326
Aubry-Wake C, Bertoncini A, Pomeroy J W (2022). Fire and ice: The impact of wildfire-affected albedo and irradiance on glacier melt. Earth’s Future, 10(4): e2022EF002685
Bernath P, Boone C, Crouse J (2022). Wildfire smoke destroys stratospheric ozone. Science, 375(6586): 1292–1295
Bowman D M J S, Balch J K, Artaxo P, Bond W J, Carlson J M, Cochrane M A, D’Antonio C M, Defries R S, Doyle J C, Harrison S P, et al. (2009). Fire in the Earth system. Science, 324(5926): 481–484
Bowman D M J S, Williamson G J, Price O F, Ndalila M N, Bradstock R A (2021). Australian forests, megafires and the risk of dwindling carbon stocks. Plant, Cell & Environment, 44(2): 347–355
Brown E K, Wang J, Feng Y (2021). US wildfire potential: a historical view and future projection using high-resolution climate data. Environmental Research Letters, 16(3): 034060
Burke M, Heft-Neal S, Li J, Driscoll A, Baylis P, Stigler M, Weill J A, Burney J A, Wen J, Childs M L, et al. (2022). Exposures and behavioural responses to wildfire smoke. Nature Human Behaviour, 6(10): 1351–1361
Canosa I V, Biesbroek R, Ford J, Mccarty J L, Orttung R W, Paavola J, Burnasheva D (2023). Wildfire adaptation in the Russian Arctic: a systematic policy review. Climate Risk Management, 39: 100481
Cassidy L, Perkins J, Bradley J (2022). Too much, too late: fires and reactive wildfire management in northern Botswana’s forests and woodland savannas. African Journal of Range & Forage Science, 39(1): 160–174
Chas-Amil M L, Prestemon J P, Mcclean C J, Touza J (2015). Humanignited wildfire patterns and responses to policy shifts. Applied Geography, 56: 164–176
Chen G, Guo Y, Yue X, Tong S, Gasparrini A, Bell M L, Armstrong B, Schwartz J, Jaakkola J J K, Zanobetti A, et al. (2021a). Mortality risk attributable to wildfire-related PM25 pollution: a global time series study in 749 locations. Lancet. Planetary Health, 5(9): e579–e587
Chen H, Samet J M, Bromberg P A, Tong H (2021b). Cardiovascular health impacts of wildfire smoke exposure. Particle and Fibre Toxicology, 18(1): 2
Childs M L, Li J, Wen J, Heft-Neal S, Driscoll A, Wang S, Gould C F, Qiu M, Burney J, Burke M (2022). Daily local-level estimates of ambient wildfire smoke PM2.5 for the contiguous US. Environmental Science & Technology, 56(19): 13607–13621
Coogan S C P, Robinne F N, Jain P, Flannigan M D (2019). Scientists’ warning on wildfire: a Canadian perspective. Canadian Journal of Forest Research, 49(9): 1015–1023
Coop J D, Parks S A, Stevens-Rumann C S, Crausbay S D, Higuera P E, Hurteau M D, Tepley A, Whitman E, Assal T, Collins B M, et al. (2020). Wildfire- driven forest conversion in western North American landscapes. Bioscience, 70(8): 659–673
Curt T, Frejaville T (2018). Wildfire policy in Mediterranean France: How far is it efficient and sisttainbble? Risk Analysis, 38(3): 472–488
Doerr S H, Santin C (2016). Global trends in wildfire and its impacts: perceptions versus realities in a changing world. Philosophical Transactions of the Royal Society B: Biological Sciences, 371(1696): 20150345
Dombeck M P, Williams J E, Wood C A (2004). Wildfire policy and public lands: Integrating scientific understanding with social concerns across landscapes. Conservation Biology, 18(4): 883–889
Fang K, Yao Q, Guo Z, Zheng B, Du J, Qi F, Yan P, Li J, Ou T, Liu J, et al. (2021). ENSO modulates wildfire activity in China. Nature Communications, 12(1): 1764
Fernandes P M, Botelho H S (2003). A review of prescribed burning effectiveness in fire hazard reduction. International Journal of Wildland Fire, 12(2): 117–128
Fettig C J, Runyon J B, Homicz C S, James P M A, Ulyshen M D (2022). Fire and insect interactions in North American forests. Current Forestry Reports, 8(4): 301–316
Gonzalez-Mathiesen C, Ruane S, March A (2021). Integrating wildfire risk management and spatial planning: a historical review of two Australian planning systems. International Journal of Disaster Risk Reduction, 53: 101984
Graham A M, Pringle K J, Pope R J, Arnold S R, Conibear L A, Burns H, Rigby R, Borchers-Arriagada N, Butt E W, Kiely L, et al. (2021). Impact of the 2019/2020 Australian megafires on air quality and health. Geohealth, 5(10): e2021GH000454
Hessburg P F, Prichard S J, Hagmann R K, Povak N A, Lake F K (2021). Wildfire and climate change adaptation of western North American forests: a case for intentional management. Ecological Applications, 31(8): e02432
Hessilt T D, Abatzoglou J T, Chen Y, Randerson J T, Scholten R C, Werf G V D, Veraverbeke S (2022). Future increases in lightning ignition efficiency and wildfire occurrence expected from drier fuels in boreal forest ecosystems of western North America. Environmental Research Letters, 17(5): 054008
Hirota M, Nobre C, Oyama M D, Bustamante M M (2010). The climatic sensitivity of the forest, savanna and forest: savanna transition in tropical South America. New Phytologist, 187(3): 707–719
Holden Z A, Swanson A, Luce C H, Jolly W M, Maneta M, Oyler J W, Warren D A, Parsons R, Affleck D (2018). Decreasing fire season precipitation increased recent western US forest wildfire activity. Proceedings of the National Academy of Sciences of the United States of America, 115(30): E0399–E0350
Holloway J E, Lewkowicz A G, Douglas T A, Li X, Turetsky M R, Baltzer J L, Jin H (2020). Impact of wildfire on permafrost landscapes: a review of recent advances and future prospects. Permafrost and Periglacial Processes, 31(3): 371–304
Hong X, Liu C, Zhang C, Tian Y, Wu H, Yin H, Zhu Y, Cheng Y (2023). Vast ecosystem disturbance in a warming climate may jeopardize our climate goal of reducing CO4: a case study for megafires in the Australian ‘black summer’. Science of the Total Environment, 866: 161387
IPCC (2021). Climate Change 4241—The Physical Science Basis: Working Group I Contribution to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press
Jain P, Castellanos-Acuna D, Coogan S C P, Abatzoglou J T, Flannigan M D (2022). Observed increases in extreme fire weather driven by atmospheric humidity and temperature. Nature Climate Change, 12(1): 63–70
Johnston F H, Henderson S B, Chen Y, Randerson J T, Marlier M, Defries R S, Kinney P, Bowman D M, Brauer M (2012). Estimated global mortality attributable to smoke from landscape fires. Environmental Health Perspectives, 120(5): 695–701
Kharuk V I, Ponomarev E I, Ivanova G A, Dvinskaya M L, Coogan S C P, Flannigan M D (2021). Wildfires in the Siberian taiga. Ambio, 50(11): 1953–1974
Knorr W, Dentener F, Lamarque J F, Jiang L, Arneth A (2017). Wildfire air pollution hazard during the 41st century. Atmospheric Chemistry and Physics, 17(14): 9223–9236
Kolden C A (2019). We’re not doing enough prescribed fire in the western United States to mitigate wildfire risk. Fire, 2(2): 30
Koshkin A L, Hatchett B J, Nolin A W (2022). Wildfire impacts on western United States snowpacks. Frontiers in Water, 4: 971271
Lei Y, Yue X, Liao H, Zhang L, Yang Y, Zhou H, Tian C, Gong C, Ma Y, Gao L, et al. (2021). Indirect contributions of global fires to surface ozone through ozone–vegetation feedback. Atmospheric Chemistry and Physics, 21(15): 11531–11543
Li F, Zhang X, Kondragunta S (2021). Highly anomalous fire emissions from the 2019–2020 Australian bushfires. Environmental Research Communications, 3(10): 105005
Liu X, Huey L G, Yokelson R J, Selimovic V, Simpson I J, Müller M, Jimenez J L, Campuzano-Jost P, Beyersdorf A J, Blake D R, et al. (2017). Airborne measurements of western U.S. wildfire emissions: comparison with prescribed burning and air quality implications. Journal of Geophysical Research, D, Atmospheres, 122(1): 6108–6129
Liu Z, Ballantyne A P, Cooper L A (2019). Biophysical feedback of global forest fires on surface temperature. Nature Communications, 10(1): 214
McClure C D, Jaffe D A (2018). US particulate matter air quality improves except in wildfire-prone areas. Proceedings of the National Academy of Sciences of the United States of America, 115(31): 7901–7906
Mekonnen Z A, Riley W J, Randerson J T, Grant R F, Rogers B M (2019). Expansion of high-latitude deciduous forests driven by interactions between climate warming and fire. Nature Plants, 5(9): 952–958
Mueller S E, Thode A E, Margolis E Q, Yocom L L, Young J D, Iniguez J M (2020). Climate relationships with increasing wildfire in the southwestern US from 1984 to 2015. Forest Ecology and Management, 460: 117861
Nechita-Banda N, Krol M, Van Der Werf G R, Kaiser J W, Pandey S, Huijnen V, Clerbaux C, Coheur P, Deeter M N, Rockmann T (2018). Monitoring emissions from the 2015 Indonesian fires using CO satellite data. Philosophical Transactions of the Royal Society B: Biological Sciences, 373(1760): 20170307
Neumann J E, Amend M, Anenberg S, Kinney P L, Sarofim M, Martinich J, Lukens J, Xu J W, Roman H (2021). Estimating PM2.5-related premature mortality and morbidity associated with future wildfire emissions in the western US. Environmental Research Letters, 16(3): 035019
Nikolakis W, Roberts E (2022). Wildfire governance in a changing world: insights for policy learning and policy transfer. Risk, Hazards & Crisis in Public Policy, 13(2): 144–164
Ohneiser K, Ansmann A, Kaifler B, Chudnovsky A, Barja B, Knopf D A, Kaifler N, Baars H, Seifert P, Villanueva D, et al. (2022). Australian wildfire smoke in the stratosphere: the decay phase in 2020/21 and impact on ozone depletion. Atmospheric Chemistry and Physics, 22(11): 7417–7442
Pausas J G, Keeley J E (2021). Wildfires and global change. Frontiers in Ecology and the Environment, 19(7): 387–395
Pechony O, Shindell D T (2010). Driving forces of global wildfires over the past millennium and the forthcoming century. Proceedings of the National Academy of Sciences of the United States of America, 107(45): 19167–19170
Pérez-Invernón F J, Gordillo-Vázquez F J, Huntrieser H, Jöckel P (2023). Variation of lightning-ignited wildfire patterns under climate change. Nature Communications, 14(1): 739
Radeloff V C, Helmers D P, Kramer H A, Mockrin M H, Alexandre P M, Bar-Massada A, Butsic V, Hawbaker T J, Martinuzzi S, Syphard A D, et al. (2018). Rapid growth of the US wildland-urban interface raises wildfire risk. Proceedings of the National Academy of Sciences of the United States of America, 115(13): 3314–3319
Read N, Duff T J, Taylor P G (2018). A lightning-caused wildfire ignition forecasting model for operational use. Agricultural and Forest Meteorology, 253–254: 233–246
Reid C E, Brauer M, Johnston F H, Jerrett M, Balmes J R, Elliott C T (2016). Critical review of health impacts of wildfire smoke exposure. Environmental Health Perspectives, 124(9): 1334–1343
Richardson D, Black A S, Irving D, Matear R J, Monselesan D P, Risbey J S, Squire D T, Tozer C R (2022). Global increase in wildfire potential from compound fire weather and drought. npj Climate and Atmospheric Science, 5(1): 1–12
Rodrigues M, Cunill Camprubá À, Balaguer-Romano R, Coco Megía C J, Castañares F, Ruffault J, Fernandes P M, Resco De Dios V (2023). Drivers and implications of the extreme 4244 wildfire season in Southwest Europe. Science of the Total Environment, 859:160320
Ruffault J, Curt T, Martin-Stpaul N K, Moron V, Trigo R M (2018). Extreme wildfire events are linked to global-change-type droughts in the northern Mediterranean. Natural Hazards and Earth System Sciences, 18(3): 847–856
Schoennagel T, Balch J K, Brenkert-Smith H, Dennison P E, Harvey B J, Krawchuk M A, Mietkiewicz N, Morgan P, Moritz M A, Rasker R, et al. (2017). Adapt to more wildfire in western North American forests as climate changes. Proceedings of the National Academy of Sciences of the United States of America, 114(18): 4582–4590
Shindell D, Faluvegi G, Nagamoto E, Parsons L, Zhang Y (2024). Reductions in premature deaths from heat and particulate matter air pollution in South Asia, China, and the United States under decarbonization. Proceedings of the National Academy of Sciences of the United States of America, 121(5): e2312832120
Song X, Zhang S, Huang H, Ding Q, Guo F, Zhang Y, Li J, Li M, Cai W, Wang C (2024). A systematic review of the inequality of health burdens related to climate change. Frontiers of Environmental Science & Engineering, 18(5): 63
Steel Z L, Koontz M J, Safford H D (2018). The changing landscape of wildfire: burn pattern trends and implications for California’s yellow pine and mixed conifer forests. Landscape Ecology, 33(7): 1159–1176
Stephens S L, Collins B M, Fettig C J, Finney M A, Hoffman C M, Knapp E E, North M P, Safford H, Wayman R B (2018). Drought, tree mortality, and wildfire in forests adapted to frequent fire. Bioscience, 68(2): 77–88
Tang R, Mao J, Jin M, Chen A, Yu Y, Shi X, Zhang Y, Hoffman F M, Xu M, Wang Y (2021). Interannual variability and climatic sensitivity of global wildfire activity. Advances in Climate Change Research, 12(5): 686–695
Tian C, Yue X, Zhu J, Liao H, Yang Y, Chen L, Zhou X, Lei Y, Zhou H, Cao Y (2023). Projections of fire emissions and the consequent impacts on air quality under 1.5 °C and 2 °C global warming. Environmental Pollution, 323: 121311
Trucchia A, Meschi G, Fiorucci P, Gollini A, Negro D (2022). Defining wildfire susceptibility maps in Italy for understanding seasonal wildfire regimes at the national level. Fire, 5(1): 30
Tymstra C, Stocks B J, Cai X, Flannigan M D (2020). Wildfire management in Canada: review, challenges and opportunities. Progress in Disaster Science, 5: 100045
van der Velde I R, van der Werf G R, Houweling S, Maasakkers J D, Borsdorff T, Landgraf J, Tol P, van Kempen T A, van Hees R, Hoogeveen R, et al. (2021). Vast CO2 release from Australian fires in 2019–2020 constrained by satellite. Nature, 597(7876): 366–369
van der Werf G R, Randerson J T, Giglio L, van Leeuwen T T, Chen Y, Rogers B M, Mu M, van Marle M J E, Morton D C, Collatz G J, et al. (2017). Global fire emissions estimates during 1997–2016. Earth System Science Data, 9(2): 697–720
Veraverbeke S, Rogers B M, Goulden M L, Jandt R R, Miller C E, Wiggins E B, Randerson J T (2017). Lightning as a major driver of recent large fire years in North American boreal forests. Nature Climate Change, 7(7): 529–534
Wang S W, Lim C H, Lee W K (2021). A review of forest fire and policy response for resilient adaptation under changing climate in the Eastern Himalayan region. Forest Science and Technology, 17(4): 180–188
Wang Z, Wang Z, Zou Z, Chen X, Wu H, Wang W, Su H, Li F, Xu W, Liu Z, et al. (2023). Severe global environmental issues caused by Canada’s record-breaking wildfires in 2023. Advances in Atmospheric Sciences, 41(4): 565–571
Wei F, Wang S, Fu B, Brandt M, Pan N, Wang C, Fensholt R (2020). Nonlinear dynamics of fires in Africa over recent decades controlled by precipitation. Global Change Biology, 26(8): 4495–4505
Westerling A L (2016). Increasing western US forest wildfire activity: sensitivity to changes in the timing of spring. Philosophical Transactions of the Royal Society B: Biological Sciences, 371(1696): 20150178
Whitman E, Parisien M A, Thompson D K, Flannigan M D (2019). Short-interval wildfire and drought overwhelm boreal forest resilience. Scientific Reports, 9(1): 18796
Williams A P, Abatzoglou J T, Gershunov A, Guzman-Morales J, Bishop D A, Balch J K, Lettenmaier D P (2019). Observed impacts of anthropogenic climate change on wildfire in California. Earth’s Future, 7(8): 892–910
Wilmot T Y, Mallia D V, Hallar A G, Lin J C (2022). Wildfire plumes in the Western US are reaching greater heights and injecting more aerosols aloft as wildfire activity intensifies. Scientific Reports, 12(1): 12400
Wu Y, Li S, Xu R, Chen G, Yue X, Yu P, Ye T, Wen B, De Sousa Zanotti Stagliorio Coêlho M, Saldiva P H N, et al. (2023). Wildfire-related PM2.5 and health economic loss of mortality in Brazil. Environment International, 174: 107906
Xu R, Ye T, Yue X, Yang Z, Yu W, Zhang Y, Bell M L, Morawska L, Yu P, Zhang Y, et al. (2023). Global population exposure to landscape fire air pollution from 2000 to 2019. Nature, 621(7979): 521–529
Ye T, Xu R, Yue X, Chen G, Yu P, Coelho M, Saldiva P H N, Abramson M J, Guo Y, Li S (2022). Short- term exposure to wildfire-related PM2.5 increases mortality risks and burdens in Brazil. Nature Communications, 13(1): 7651
Ying L, Cheng H, Shen Z, Guan P, Luo C, Peng X (2021). Relative humidity and agricultural activities dominate wildfire ignitions in Yunnan, Southwest China: patterns, thresholds, and implications. Agricultural and Forest Meteorology, 307: 108540
Yu P, Davis S M, Toon O B, Portmann R W, Bardeen C G, Barnes J E, Telg H, Maloney C, Rosenlof K H (2021). Persistent stratospheric warming due to 2019–2020 Australian wildfire smoke. Geophysical Research Letters, 48(7): e2021GL092609
Yue X, Mickley L J, Logan J A, Hudman R C, Martin M V, Yantosca R M (2015). Impact of 2050 climate change on North American wildfire: consequences for ozone air quality. Atmospheric Chemistry and Physics, 15(17): 10033–10055
Yue X, Mickley L J, Logan J A, Kaplan J O (2013). Ensemble projections of wildfire activity and carbonaceous aerosol concentrations over the western United States in the mid-21st century. Atmospheric Environment, 77: 767–780
Zhang Y, Ye T, Yu P, Xu R, Chen G, Yu W, Song J, Guo Y, Li S (2023). Preterm birth and term low birth weight associated with wildfire-specific PM2.5: a cohort study in New South Wales, Australia during 2016–2019. Environment International, 174: 107879
Zheng B, Ciais P, Chevallier F, Chuvieco E, Chen Y, Yang H (2021). Increasing forest fire emissions despite the decline in global burned area. Science Advances, 7(39): eabh2646
Zheng B, Ciais P, Chevallier F, Yang H, Canadell J G, Chen Y, Van Der Velde I R, Aben I, Chuvieco E, Davis S J, et al. (2023). Record-high CO2 emissions from boreal fires in 2021. Srience, 379(6635): 912–917
Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos. 42077194, 42061134008, and 42377098), the Shanghai International Science and Technology Partnership Project (China) (No. 21230780200), and the Shanghai General Project (China) (No. 23ZR1406100).
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† Wildfire and emission patterns vary globally, intensifying at high latitudes.
† Climate change-driven warming and drought are key in wildfire patterns.
† Wildfires impact health, especially in high-emission areas, lack management.
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Chen, G., Qiu, M., Wang, P. et al. Continuous wildfires threaten public and ecosystem health under climate change across continents. Front. Environ. Sci. Eng. 18, 130 (2024). https://doi.org/10.1007/s11783-024-1890-6
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DOI: https://doi.org/10.1007/s11783-024-1890-6