2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean
Abstract During late 2019 and early 2020, Australia experienced one of the most active bushfire seasons that advected large emissions over the adjacent ocean. Herein, we present a comprehensive research on mixed atmospheric aerosol particulate pollution emitted by wildfires in the atmosphere and the...
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Online Access: | http://dx.doi.org/10.1038/s41598-021-91547-y http://www.nature.com/articles/s41598-021-91547-y.pdf http://www.nature.com/articles/s41598-021-91547-y |
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crspringernat:10.1038/s41598-021-91547-y 2023-05-15T13:06:45+02:00 2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean Li, Mengyu Shen, Fang Sun, Xuerong National Natural Science Foundation of China East China Normal University 2021 http://dx.doi.org/10.1038/s41598-021-91547-y http://www.nature.com/articles/s41598-021-91547-y.pdf http://www.nature.com/articles/s41598-021-91547-y en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 11, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2021 crspringernat https://doi.org/10.1038/s41598-021-91547-y 2022-01-04T08:51:11Z Abstract During late 2019 and early 2020, Australia experienced one of the most active bushfire seasons that advected large emissions over the adjacent ocean. Herein, we present a comprehensive research on mixed atmospheric aerosol particulate pollution emitted by wildfires in the atmosphere and the ocean. Based on a wide range of physical and biochemical data, including the Aerosol Robotic Network, multi-satellite observations, and Argo floats, we investigated the spatio-temporal variations and mixed compositions of aerosol particles, deposition in the coastal waters of eastern Australia and the South Pacific Ocean, and biogeochemical responses in the water column. Four types of wildfire-derived mixed particles were classified by using the optical properties of aerosols into four types, including the background aerosols, mineral dust, wildfire smoke particles, and residual smoke. The coarse particles accounted for more than 60% of the mineral dust on 22 November 2019 in the Tasman Sea; afterwards, during the wildfire smoke episode from December 2019 to January 2020, the particles affected large areas of the atmosphere such as eastern Australia, the South Pacific Ocean, and South America. The maximum value of the aerosol optical depth reached 2.74, and the proportion of fine particles accounted for 98.9% in the smoke episode. Mineral dust and smoke particles from the fire emissions changed the particle composition in the surface ocean. Particle deposition accounted for increases in chlorophyll-a concentration (Chl a ) standardized anomaly up to maximum of 23.3 with a lag time of less than 8 days. In the vertical direction, float observations showed the impact of exogenous particles on the water column could up to 64.7 m deep, resulting in Chl a of 1.85 mg/m 3 . The high Chl a lasted for a minimum period of two months until it returned to normal level. Article in Journal/Newspaper Aerosol Robotic Network Springer Nature (via Crossref) Pacific Scientific Reports 11 1 |
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Springer Nature (via Crossref) |
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English |
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Multidisciplinary |
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Multidisciplinary Li, Mengyu Shen, Fang Sun, Xuerong 2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean |
topic_facet |
Multidisciplinary |
description |
Abstract During late 2019 and early 2020, Australia experienced one of the most active bushfire seasons that advected large emissions over the adjacent ocean. Herein, we present a comprehensive research on mixed atmospheric aerosol particulate pollution emitted by wildfires in the atmosphere and the ocean. Based on a wide range of physical and biochemical data, including the Aerosol Robotic Network, multi-satellite observations, and Argo floats, we investigated the spatio-temporal variations and mixed compositions of aerosol particles, deposition in the coastal waters of eastern Australia and the South Pacific Ocean, and biogeochemical responses in the water column. Four types of wildfire-derived mixed particles were classified by using the optical properties of aerosols into four types, including the background aerosols, mineral dust, wildfire smoke particles, and residual smoke. The coarse particles accounted for more than 60% of the mineral dust on 22 November 2019 in the Tasman Sea; afterwards, during the wildfire smoke episode from December 2019 to January 2020, the particles affected large areas of the atmosphere such as eastern Australia, the South Pacific Ocean, and South America. The maximum value of the aerosol optical depth reached 2.74, and the proportion of fine particles accounted for 98.9% in the smoke episode. Mineral dust and smoke particles from the fire emissions changed the particle composition in the surface ocean. Particle deposition accounted for increases in chlorophyll-a concentration (Chl a ) standardized anomaly up to maximum of 23.3 with a lag time of less than 8 days. In the vertical direction, float observations showed the impact of exogenous particles on the water column could up to 64.7 m deep, resulting in Chl a of 1.85 mg/m 3 . The high Chl a lasted for a minimum period of two months until it returned to normal level. |
author2 |
National Natural Science Foundation of China East China Normal University |
format |
Article in Journal/Newspaper |
author |
Li, Mengyu Shen, Fang Sun, Xuerong |
author_facet |
Li, Mengyu Shen, Fang Sun, Xuerong |
author_sort |
Li, Mengyu |
title |
2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean |
title_short |
2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean |
title_full |
2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean |
title_fullStr |
2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean |
title_full_unstemmed |
2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean |
title_sort |
2019‒2020 australian bushfire air particulate pollution and impact on the south pacific ocean |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41598-021-91547-y http://www.nature.com/articles/s41598-021-91547-y.pdf http://www.nature.com/articles/s41598-021-91547-y |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Scientific Reports volume 11, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-91547-y |
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Scientific Reports |
container_volume |
11 |
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1 |
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1766018915375251456 |