Characterizing Marine Heatwaves in the Kerguelen Plateau Region
Marine heatwaves (MHWs) are prolonged extreme oceanic warm water events. Globally, the frequency and intensity of MHWs have been increasing in recent years, and it is expected that this trend is reflected in the Kerguelen Plateau region. MHWs can negatively impact the structure of marine biodiversit...
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ftdoajarticles:oai:doaj.org/article:123844aafd2b49338a8767a2d125167e 2023-05-15T17:54:43+02:00 Characterizing Marine Heatwaves in the Kerguelen Plateau Region Zimeng Su Gabriela S. Pilo Stuart Corney Neil J. Holbrook Mao Mori Philippe Ziegler 2021-01-01T00:00:00Z https://doi.org/10.3389/fmars.2020.531297 https://doaj.org/article/123844aafd2b49338a8767a2d125167e EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2020.531297/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.531297 https://doaj.org/article/123844aafd2b49338a8767a2d125167e Frontiers in Marine Science, Vol 7 (2021) climate extremes ocean extremes anomalous temperatures ocean warming Patagonian toothfish hot-spot Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2020.531297 2022-12-31T07:00:44Z Marine heatwaves (MHWs) are prolonged extreme oceanic warm water events. Globally, the frequency and intensity of MHWs have been increasing in recent years, and it is expected that this trend is reflected in the Kerguelen Plateau region. MHWs can negatively impact the structure of marine biodiversity, marine ecosystems, and commercial fisheries. Considering that the KP is a hot-spot for marine biodiversity, characterizing MHWs and their drivers for this region is important, but has not been performed. Here, we characterize MHWs in the KP region between January 1994 and December 2016 using a combination of remotely sensed observations and output from a publicly available model hindcast simulation. We describe a strong MHW event that starts during the 2011/2012 austral summer and persists through winter, dissipating in late 2012. During the winter months, the anomalous temperature signal deepens from the surface to a depth of at least 150 m. We show that downwelling-favorable winds occur in the region during these months. At the end of 2012, as the MHW dissipates, upwelling-favorable winds prevail. We also show that the ocean temperature on the KP is significantly correlated with key modes of climate variability. Over the KP, temperature at both the ocean surface and at a depth of 150 m correlates significantly with the Indian Ocean Dipole. To the south of the KP, temperature variations are significantly correlated with the El Niño Southern Oscillation, and to both the north and south of the KP, with the Southern Annular Mode. These results suggest there may be potential predictability in ocean temperatures, and their extremes, in the KP region. Strong MHWs, like the event in 2012, may be detrimental to the unique ecosystem of this region, including economically relevant species, such as the Patagonian Toothfish. Article in Journal/Newspaper Patagonian Toothfish Directory of Open Access Journals: DOAJ Articles Austral Kerguelen Indian Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
climate extremes ocean extremes anomalous temperatures ocean warming Patagonian toothfish hot-spot Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
climate extremes ocean extremes anomalous temperatures ocean warming Patagonian toothfish hot-spot Science Q General. Including nature conservation geographical distribution QH1-199.5 Zimeng Su Gabriela S. Pilo Stuart Corney Neil J. Holbrook Mao Mori Philippe Ziegler Characterizing Marine Heatwaves in the Kerguelen Plateau Region |
topic_facet |
climate extremes ocean extremes anomalous temperatures ocean warming Patagonian toothfish hot-spot Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Marine heatwaves (MHWs) are prolonged extreme oceanic warm water events. Globally, the frequency and intensity of MHWs have been increasing in recent years, and it is expected that this trend is reflected in the Kerguelen Plateau region. MHWs can negatively impact the structure of marine biodiversity, marine ecosystems, and commercial fisheries. Considering that the KP is a hot-spot for marine biodiversity, characterizing MHWs and their drivers for this region is important, but has not been performed. Here, we characterize MHWs in the KP region between January 1994 and December 2016 using a combination of remotely sensed observations and output from a publicly available model hindcast simulation. We describe a strong MHW event that starts during the 2011/2012 austral summer and persists through winter, dissipating in late 2012. During the winter months, the anomalous temperature signal deepens from the surface to a depth of at least 150 m. We show that downwelling-favorable winds occur in the region during these months. At the end of 2012, as the MHW dissipates, upwelling-favorable winds prevail. We also show that the ocean temperature on the KP is significantly correlated with key modes of climate variability. Over the KP, temperature at both the ocean surface and at a depth of 150 m correlates significantly with the Indian Ocean Dipole. To the south of the KP, temperature variations are significantly correlated with the El Niño Southern Oscillation, and to both the north and south of the KP, with the Southern Annular Mode. These results suggest there may be potential predictability in ocean temperatures, and their extremes, in the KP region. Strong MHWs, like the event in 2012, may be detrimental to the unique ecosystem of this region, including economically relevant species, such as the Patagonian Toothfish. |
format |
Article in Journal/Newspaper |
author |
Zimeng Su Gabriela S. Pilo Stuart Corney Neil J. Holbrook Mao Mori Philippe Ziegler |
author_facet |
Zimeng Su Gabriela S. Pilo Stuart Corney Neil J. Holbrook Mao Mori Philippe Ziegler |
author_sort |
Zimeng Su |
title |
Characterizing Marine Heatwaves in the Kerguelen Plateau Region |
title_short |
Characterizing Marine Heatwaves in the Kerguelen Plateau Region |
title_full |
Characterizing Marine Heatwaves in the Kerguelen Plateau Region |
title_fullStr |
Characterizing Marine Heatwaves in the Kerguelen Plateau Region |
title_full_unstemmed |
Characterizing Marine Heatwaves in the Kerguelen Plateau Region |
title_sort |
characterizing marine heatwaves in the kerguelen plateau region |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2020.531297 https://doaj.org/article/123844aafd2b49338a8767a2d125167e |
geographic |
Austral Kerguelen Indian |
geographic_facet |
Austral Kerguelen Indian |
genre |
Patagonian Toothfish |
genre_facet |
Patagonian Toothfish |
op_source |
Frontiers in Marine Science, Vol 7 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2020.531297/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.531297 https://doaj.org/article/123844aafd2b49338a8767a2d125167e |
op_doi |
https://doi.org/10.3389/fmars.2020.531297 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766162525395615744 |