Substantial Increases in Eastern Amazon and Cerrado Biomass Burning‐Sourced Tropospheric Ozone

Pope, Richard J.; Arnold, S. R.; Chipperfield, Martyn P.; Reddington, Carly L.; Butt, Edward; Keslake, Tim; Feng, Wuhu; Latter, Barry G.; Kerridge, B. J.; Siddans, Richard; Rizzo, L. V.; Artaxo, Paulo; Sadiq, Mehliyar; Tai, Amos P. K.

doi:10.1029/2019gl084143

Cited by 28 publications

(19 citation statements)

References 63 publications

(93 reference statements)

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“…Lei et al: Indirect contributions of global fires to surface ozone dry deposition. Moreover, weakened leaf-level transpiration following O 3 damage modulates meteorological parameters, such as surface air temperature and atmospheric relative humidity, leading to substantial biogeophysical feedbacks on surface O 3 (Lombardozzi et al, 2012;Sadiq et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Interactions between air pollution and terrestrial ecosystems remain challenging due to limited process-based knowledge and the separate development of chemistry and vegetation models (He et al, 2020). At present, the feedbacks from O 3 -damaging vegetation on O 3 have only been examined by four papers (Sadiq et al, 2017;Zhou et al, 2018;Zhu et al, 2021). Sadiq et al (2017) implemented a parameterization of O 3 vegetation damage into a climate model and quantified online O 3 -vegetation coupling.…”

Section: Introductionmentioning

confidence: 99%

“…At present, the feedbacks from O 3 -damaging vegetation on O 3 have only been examined by four papers (Sadiq et al, 2017;Zhou et al, 2018;Zhu et al, 2021). Sadiq et al (2017) implemented a parameterization of O 3 vegetation damage into a climate model and quantified online O 3 -vegetation coupling. Simulations showed that surface O 3 could be enhanced by up to 4-6 ppbv over Europe, North America, and China through comparable effects from biogeochemical (decreased dry deposition and increased isoprene emissions) and biogeophysical (changes in meteorological variables following reduced transpiration rate) feedbacks from O 3 -vegetation interactions.…”

Section: Introductionmentioning

confidence: 99%

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Indirect contributions of global fires to surface ozone through ozone–vegetation feedback

et al. 2021

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Abstract. Fire is an important source of ozone (O3) precursors. The formation of surface O3 can cause damage to vegetation and reduce stomatal conductance. Such processes can feed back to inhibit dry deposition and indirectly enhance surface O3. Here, we apply a fully coupled chemistry–vegetation model to estimate the indirect contributions of global fires to surface O3 through O3–vegetation feedback during 2005–2012. Fire emissions directly increase the global annual mean O3 by 1.2 ppbv (5.0 %) with a maximum of 5.9 ppbv (24.4 %) averaged over central Africa by emitting a substantial number of precursors. Considering O3–vegetation feedback, fires additionally increase surface O3 by 0.5 ppbv averaged over the Amazon in October, 0.3 ppbv averaged over southern Asia in April, and 0.2 ppbv averaged over central Africa in April. During extreme O3–vegetation interactions, such a feedback can rise to >0.6 ppbv in these fire-prone areas. Moreover, large ratios of indirect-to-direct fire O3 are found in eastern China (3.7 %) and the eastern US (2.0 %), where the high ambient O3 causes strong O3–vegetation interactions. With the likelihood of increasing fire risks in a warming climate, fires may promote surface O3 through both direct emissions and indirect chemistry–vegetation feedbacks. Such indirect enhancement will cause additional threats to public health and ecosystem productivity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Indirect contributions of global fires to surface ozone through ozone–vegetation feedback

et al. 2021

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“…9). As burning in this biome increases, it may significantly alter atmospheric chemistry, as reported in recent study on the Eastern Amazon and Cerrado; Pope et al 27 found an increase in burning rates, mainly between 2005 and 2016. This significant increase in fires as a result of deforestation in the Amazon and the increase in fires in the Cerrado produces atmospheric CO 2 emissions to the troposphere and exacerbates the ozone problem, further accelerating global warming.…”

Section: Discussionmentioning

confidence: 71%

Persistent fire foci in all biomes undermine the Paris Agreement in Brazil

Silva

Teodoro

Delgado

et al. 2020

Sci Rep

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Brazil is one of the world’s biggest emitters of greenhouse gases (GHGs). Fire foci across the country contributes to these emissions and compromises emission reduction targets pledged by Brazil under the Paris Agreement. In this paper, we quantify fire foci, burned areas, and carbon emissions in all Brazilian biomes (i.e., Amazon, Cerrado, Caatinga, Atlantic Forest, Pantanal and Pampa). We analyzed these variables using cluster analysis and non-parametric statistics to predict carbon and CO2 emissions for the next decade. Our results showed no increase in the number of fire foci and carbon emissions for the evaluated time series, whereby the highest emissions occur and will persist in the Amazon and Cerrado biomes. The Atlantic Forest, Pantanal, Caatinga and Pampa biomes had low emissions compared to the Amazon and Cerrado. Based on 2030 projections, the sum of emissions from fire foci in the six Brazilian biomes will exceed 5.7 Gt CO2, compromising the national GHG reduction targets. To reduce GHG emissions, Brazil will need to control deforestation induced by the expansion of the agricultural frontier in the Amazon and Cerrado biomes. This can only be achieved through significant political effort involving the government, entrepreneurs and society as a collective.

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“…Measurements of surface [O3] in the U.S. are provided by Air Quality System (AQS, https://www.epa.gov/aqs), those over Europe are provided by European Monitoring and Evaluation Programme (EMEP, https://emep.int). The observed [O3] at Manaus, Tg Malim, and Welgegund sites are from earlier studies(Ahamad et al, 2014;Laban et al, 2018;Pope et al, 2020).…”

mentioning

confidence: 77%

Indirect contributions of global fires to surface ozone through ozone-vegetation feedback

Lei¹,

Yue²,

Liu³

et al. 2021

Preprint

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Abstract. Fire is an important source of surface ozone (O3), which causes damage to vegetation and reduces stomatal conductance. Such processes can feed back to inhibit dry deposition and indirectly enhance surface O3. Here, we apply a fully coupled chemistry-vegetation model to estimate the indirect contributions of global fires to surface O3 through O3-vegetation feedback during 2005–2012. Fire emissions directly increase the global mean annual O3 by 1.2 ppbv (5.0 %) with a maximum of 5.9 ppbv (24.4 %) averaged over central Africa by emitting substantial number of precursors. Considering O3-vegetation feedback, fires additionally increase surface O3 by 0.5 ppbv averaged over the Amazon in October, 0.3 ppbv averaged over southern Asia in April, and 0.2 ppbv averaged over central Africa in April. During extreme O3-vegetation interactions, such feedback can rise to > 0.6 ppbv in these fire-prone areas. Moreover, large ratios of indirect-to-direct fire O3 are found in eastern China (3.7 %) and the eastern U.S. (2.0 %), where the high ambient O3 causes strong O3-vegetation interactions. With likelihood of increasing fire risks in a warming climate, fires may promote surface O3 through both direct emissions and indirect chemistry-vegetation feedbacks. Such indirect enhancement will cause additional threats to public health and ecosystem productivity.

show abstract

Substantial Increases in Eastern Amazon and Cerrado Biomass Burning‐Sourced Tropospheric Ozone

Cited by 28 publications

References 63 publications

Indirect contributions of global fires to surface ozone through ozone–vegetation feedback

Indirect contributions of global fires to surface ozone through ozone–vegetation feedback

Persistent fire foci in all biomes undermine the Paris Agreement in Brazil

Indirect contributions of global fires to surface ozone through ozone-vegetation feedback

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