A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage.
Uptake of atmospheric carbon by the ocean, especially at high latitudes, plays an important role in offsetting anthropogenic emissions. At the surface of the Southern Ocean south of 30∘S, the ocean carbon uptake, which had been weakening in 1990s, strengthened in the 2000s. However, sparseness of in...
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Online Access: | https://doi.org/10.1038/s41467-022-31560-5 https://pubmed.ncbi.nlm.nih.gov/35831323 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9279406/ |
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ftpubmed:35831323 2024-09-30T14:43:56+00:00 A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage. Zemskova, Varvara E He, Tai-Long Wan, Zirui Grisouard, Nicolas 2022 Jul 13 https://doi.org/10.1038/s41467-022-31560-5 https://pubmed.ncbi.nlm.nih.gov/35831323 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9279406/ eng eng Nature Publishing Group https://doi.org/10.1038/s41467-022-31560-5 https://pubmed.ncbi.nlm.nih.gov/35831323 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9279406/ © 2022. The Author(s). Nat Commun ISSN:2041-1723 Volume:13 Issue:1 Journal Article 2022 ftpubmed https://doi.org/10.1038/s41467-022-31560-5 2024-08-31T16:02:00Z Uptake of atmospheric carbon by the ocean, especially at high latitudes, plays an important role in offsetting anthropogenic emissions. At the surface of the Southern Ocean south of 30∘S, the ocean carbon uptake, which had been weakening in 1990s, strengthened in the 2000s. However, sparseness of in-situ measurements in the ocean interior make it difficult to compute changes in carbon storage below the surface. Here we develop a machine-learning model, which can estimate concentrations of dissolved inorganic carbon (DIC) in the Southern Ocean up to 4 km depth only using data available at the ocean surface. Our model is fast and computationally inexpensive. We apply it to calculate trends in DIC concentrations over the past three decades and find that DIC decreased in the 1990s and 2000s, but has increased, in particular in the upper ocean since the 2010s. However, the particular circulation dynamics that drove these changes may have differed across zonal sectors of the Southern Ocean. While the near-surface decrease in DIC concentrations would enhance atmospheric CO2 uptake continuing the previously-found trends, weakened connectivity between surface and deep layers and build-up of DIC in deep waters could reduce the ocean's carbon storage potential. Article in Journal/Newspaper Southern Ocean PubMed Central (PMC) Southern Ocean Nature Communications 13 1 |
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English |
description |
Uptake of atmospheric carbon by the ocean, especially at high latitudes, plays an important role in offsetting anthropogenic emissions. At the surface of the Southern Ocean south of 30∘S, the ocean carbon uptake, which had been weakening in 1990s, strengthened in the 2000s. However, sparseness of in-situ measurements in the ocean interior make it difficult to compute changes in carbon storage below the surface. Here we develop a machine-learning model, which can estimate concentrations of dissolved inorganic carbon (DIC) in the Southern Ocean up to 4 km depth only using data available at the ocean surface. Our model is fast and computationally inexpensive. We apply it to calculate trends in DIC concentrations over the past three decades and find that DIC decreased in the 1990s and 2000s, but has increased, in particular in the upper ocean since the 2010s. However, the particular circulation dynamics that drove these changes may have differed across zonal sectors of the Southern Ocean. While the near-surface decrease in DIC concentrations would enhance atmospheric CO2 uptake continuing the previously-found trends, weakened connectivity between surface and deep layers and build-up of DIC in deep waters could reduce the ocean's carbon storage potential. |
format |
Article in Journal/Newspaper |
author |
Zemskova, Varvara E He, Tai-Long Wan, Zirui Grisouard, Nicolas |
spellingShingle |
Zemskova, Varvara E He, Tai-Long Wan, Zirui Grisouard, Nicolas A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage. |
author_facet |
Zemskova, Varvara E He, Tai-Long Wan, Zirui Grisouard, Nicolas |
author_sort |
Zemskova, Varvara E |
title |
A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage. |
title_short |
A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage. |
title_full |
A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage. |
title_fullStr |
A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage. |
title_full_unstemmed |
A deep-learning estimate of the decadal trends in the Southern Ocean carbon storage. |
title_sort |
deep-learning estimate of the decadal trends in the southern ocean carbon storage. |
publisher |
Nature Publishing Group |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41467-022-31560-5 https://pubmed.ncbi.nlm.nih.gov/35831323 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9279406/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Nat Commun ISSN:2041-1723 Volume:13 Issue:1 |
op_relation |
https://doi.org/10.1038/s41467-022-31560-5 https://pubmed.ncbi.nlm.nih.gov/35831323 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9279406/ |
op_rights |
© 2022. The Author(s). |
op_doi |
https://doi.org/10.1038/s41467-022-31560-5 |
container_title |
Nature Communications |
container_volume |
13 |
container_issue |
1 |
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1811645500938518528 |