African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean.
The deposition of phosphorus (P) from African dust is believed to play an important role in bolstering primary productivity in the Amazon Basin and Tropical Atlantic Ocean (TAO), leading to sequestration of carbon dioxide. However, there are few measurements of African dust in South America that can...
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Online Access: | https://doi.org/10.1073/pnas.1906091116 https://pubmed.ncbi.nlm.nih.gov/31358622 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6697889/ |
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ftpubmed:31358622 2024-09-15T18:37:19+00:00 African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean. Barkley, Anne E Prospero, Joseph M Mahowald, Natalie Hamilton, Douglas S Popendorf, Kimberly J Oehlert, Amanda M Pourmand, Ali Gatineau, Alexandre Panechou-Pulcherie, Kathy Blackwelder, Patricia Gaston, Cassandra J 2019-08-13 https://doi.org/10.1073/pnas.1906091116 https://pubmed.ncbi.nlm.nih.gov/31358622 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6697889/ eng eng Atypon https://doi.org/10.1073/pnas.1906091116 https://pubmed.ncbi.nlm.nih.gov/31358622 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6697889/ Proc Natl Acad Sci U S A ISSN:1091-6490 Volume:116 Issue:33 Amazon Basin Atlantic Ocean biomass burning dust phosphorus Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2019 ftpubmed https://doi.org/10.1073/pnas.1906091116 2024-07-19T16:02:00Z The deposition of phosphorus (P) from African dust is believed to play an important role in bolstering primary productivity in the Amazon Basin and Tropical Atlantic Ocean (TAO), leading to sequestration of carbon dioxide. However, there are few measurements of African dust in South America that can robustly test this hypothesis and even fewer measurements of soluble P, which is readily available for stimulating primary production in the ocean. To test this hypothesis, we measured total and soluble P in long-range transported aerosols collected in Cayenne, French Guiana, a TAO coastal site located at the northeastern edge of the Amazon. Our measurements confirm that in boreal spring when African dust transport is greatest, dust supplies the majority of P, of which 5% is soluble. In boreal fall, when dust transport is at an annual minimum, we measured unexpectedly high concentrations of soluble P, which we show is associated with the transport of biomass burning (BB) from southern Africa. Integrating our results into a chemical transport model, we show that African BB supplies up to half of the P deposited annually to the Amazon from transported African aerosol. This observational study links P-rich BB aerosols from Africa to enhanced P deposition in the Amazon. Contrary to current thought, we also show that African BB is a more important source of soluble P than dust to the TAO and oceans in the Southern Hemisphere and may be more important for marine productivity, particularly in boreal summer and fall. Article in Journal/Newspaper Southern Ocean PubMed Central (PMC) Proceedings of the National Academy of Sciences 116 33 16216 16221 |
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op_collection_id |
ftpubmed |
language |
English |
topic |
Amazon Basin Atlantic Ocean biomass burning dust phosphorus |
spellingShingle |
Amazon Basin Atlantic Ocean biomass burning dust phosphorus Barkley, Anne E Prospero, Joseph M Mahowald, Natalie Hamilton, Douglas S Popendorf, Kimberly J Oehlert, Amanda M Pourmand, Ali Gatineau, Alexandre Panechou-Pulcherie, Kathy Blackwelder, Patricia Gaston, Cassandra J African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean. |
topic_facet |
Amazon Basin Atlantic Ocean biomass burning dust phosphorus |
description |
The deposition of phosphorus (P) from African dust is believed to play an important role in bolstering primary productivity in the Amazon Basin and Tropical Atlantic Ocean (TAO), leading to sequestration of carbon dioxide. However, there are few measurements of African dust in South America that can robustly test this hypothesis and even fewer measurements of soluble P, which is readily available for stimulating primary production in the ocean. To test this hypothesis, we measured total and soluble P in long-range transported aerosols collected in Cayenne, French Guiana, a TAO coastal site located at the northeastern edge of the Amazon. Our measurements confirm that in boreal spring when African dust transport is greatest, dust supplies the majority of P, of which 5% is soluble. In boreal fall, when dust transport is at an annual minimum, we measured unexpectedly high concentrations of soluble P, which we show is associated with the transport of biomass burning (BB) from southern Africa. Integrating our results into a chemical transport model, we show that African BB supplies up to half of the P deposited annually to the Amazon from transported African aerosol. This observational study links P-rich BB aerosols from Africa to enhanced P deposition in the Amazon. Contrary to current thought, we also show that African BB is a more important source of soluble P than dust to the TAO and oceans in the Southern Hemisphere and may be more important for marine productivity, particularly in boreal summer and fall. |
format |
Article in Journal/Newspaper |
author |
Barkley, Anne E Prospero, Joseph M Mahowald, Natalie Hamilton, Douglas S Popendorf, Kimberly J Oehlert, Amanda M Pourmand, Ali Gatineau, Alexandre Panechou-Pulcherie, Kathy Blackwelder, Patricia Gaston, Cassandra J |
author_facet |
Barkley, Anne E Prospero, Joseph M Mahowald, Natalie Hamilton, Douglas S Popendorf, Kimberly J Oehlert, Amanda M Pourmand, Ali Gatineau, Alexandre Panechou-Pulcherie, Kathy Blackwelder, Patricia Gaston, Cassandra J |
author_sort |
Barkley, Anne E |
title |
African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean. |
title_short |
African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean. |
title_full |
African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean. |
title_fullStr |
African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean. |
title_full_unstemmed |
African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean. |
title_sort |
african biomass burning is a substantial source of phosphorus deposition to the amazon, tropical atlantic ocean, and southern ocean. |
publisher |
Atypon |
publishDate |
2019 |
url |
https://doi.org/10.1073/pnas.1906091116 https://pubmed.ncbi.nlm.nih.gov/31358622 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6697889/ |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Proc Natl Acad Sci U S A ISSN:1091-6490 Volume:116 Issue:33 |
op_relation |
https://doi.org/10.1073/pnas.1906091116 https://pubmed.ncbi.nlm.nih.gov/31358622 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6697889/ |
op_doi |
https://doi.org/10.1073/pnas.1906091116 |
container_title |
Proceedings of the National Academy of Sciences |
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116 |
container_issue |
33 |
container_start_page |
16216 |
op_container_end_page |
16221 |
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1810481684236206080 |