Pope, RJ orcid.org/0000-0002-3587-837X, Arnold, SR orcid.org/0000-0002-4881-5685, Chipperfield, MP orcid.org/0000-0002-6803-4149 et al. (11 more authors) (2020) Substantial Increases in Eastern Amazon and Cerrado Biomass Burning‐Sourced Tropospheric Ozone. Geophysical Research Letters, 47 (3). e2019GL084143. ISSN 0094-8276
Abstract
The decline in Amazonian deforestation rates and biomass burning activity (2001–2012) has been shown to reduce air pollutant emissions (e.g., aerosols) and improve regional air quality. However, in the Cerrado region (savannah grasslands in northeastern Brazil), satellite observations reveal increases in fire activity and tropospheric column nitrogen dioxide (an ozone precursor) during the burning season (August‐October, 2005–2016), which have partially offset these air quality benefits. Simulations from a 3‐D global chemistry transport model (CTM) capture this increase in NO2 with a surface increase of ~1 ppbv per decade. As there are limited long‐term observational tropospheric ozone records, we utilize the well‐evaluated CTM to investigate changes in ozone. Here, the CTM suggests that Cerrado region surface ozone is increasing by ~10 ppbv per decade. If left unmitigated, these positive fire‐sourced ozone trends will substantially increase the regional health risks and impacts from expected future enhancements in South American biomass burning activity under climate change.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019. American Geophysical Union. All Rights Reserved. This is an author produced version of a paper published in Earth and Planetary Science Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | air quality; Earth observation; biomass burning; tropospheric ozone; tropospheric column NO2; burned area |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > National Centre for Atmos Science (NCAS) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 Mar 2020 11:48 |
Last Modified: | 18 Jun 2020 00:38 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1029/2019GL084143 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:157863 |