Observed regional impacts of marine heatwaves on air-sea CO2 exchange
Marine heatwaves (MHWs) have devastating effects on ecosystems and impact regional air-sea CO2 exchange. Yet a global assessment of these regional impacts of MHWs on the air-sea CO2 exchange is missing. Here, we analyze thirty global observation-based air-sea CO2 flux datasets from 1990 to 2019. We...
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crwinnower:10.22541/essoar.171707892.29222066/v1 2024-06-23T07:56:56+00:00 Observed regional impacts of marine heatwaves on air-sea CO2 exchange Li, Catherine Burger, Friedrich Anton Raible, Christoph Frölicher, Thomas Lukas 2024 http://dx.doi.org/10.22541/essoar.171707892.29222066/v1 unknown Authorea, Inc. posted-content 2024 crwinnower https://doi.org/10.22541/essoar.171707892.29222066/v1 2024-06-04T06:49:21Z Marine heatwaves (MHWs) have devastating effects on ecosystems and impact regional air-sea CO2 exchange. Yet a global assessment of these regional impacts of MHWs on the air-sea CO2 exchange is missing. Here, we analyze thirty global observation-based air-sea CO2 flux datasets from 1990 to 2019. We observe minimal reduction in global oceanic CO2 uptake during MHWs. Regional variations are evident with the equatorial Pacific experiencing a 31% (spread across datasets: 3-49%) reduction in carbon release, suggesting that MHWs are the dominant drivers of strong air-sea CO2 flux anomalies in this region. In low-to-mid latitudes, MHWs cause a 29% (19-37%) decrease in air-sea CO2 uptake. Reduced dissolved inorganic carbon in the tropics weakens outgassing, while high ocean temperatures diminish uptake in the low-to-mid latitudes. In the North Pacific and Southern Ocean, enhanced carbon uptake occurs during MHWs, but uncertainties in pCO2 datasets limit a comprehensive assessment in these regions. Other/Unknown Material Southern Ocean The Winnower Pacific Southern Ocean |
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description |
Marine heatwaves (MHWs) have devastating effects on ecosystems and impact regional air-sea CO2 exchange. Yet a global assessment of these regional impacts of MHWs on the air-sea CO2 exchange is missing. Here, we analyze thirty global observation-based air-sea CO2 flux datasets from 1990 to 2019. We observe minimal reduction in global oceanic CO2 uptake during MHWs. Regional variations are evident with the equatorial Pacific experiencing a 31% (spread across datasets: 3-49%) reduction in carbon release, suggesting that MHWs are the dominant drivers of strong air-sea CO2 flux anomalies in this region. In low-to-mid latitudes, MHWs cause a 29% (19-37%) decrease in air-sea CO2 uptake. Reduced dissolved inorganic carbon in the tropics weakens outgassing, while high ocean temperatures diminish uptake in the low-to-mid latitudes. In the North Pacific and Southern Ocean, enhanced carbon uptake occurs during MHWs, but uncertainties in pCO2 datasets limit a comprehensive assessment in these regions. |
format |
Other/Unknown Material |
author |
Li, Catherine Burger, Friedrich Anton Raible, Christoph Frölicher, Thomas Lukas |
spellingShingle |
Li, Catherine Burger, Friedrich Anton Raible, Christoph Frölicher, Thomas Lukas Observed regional impacts of marine heatwaves on air-sea CO2 exchange |
author_facet |
Li, Catherine Burger, Friedrich Anton Raible, Christoph Frölicher, Thomas Lukas |
author_sort |
Li, Catherine |
title |
Observed regional impacts of marine heatwaves on air-sea CO2 exchange |
title_short |
Observed regional impacts of marine heatwaves on air-sea CO2 exchange |
title_full |
Observed regional impacts of marine heatwaves on air-sea CO2 exchange |
title_fullStr |
Observed regional impacts of marine heatwaves on air-sea CO2 exchange |
title_full_unstemmed |
Observed regional impacts of marine heatwaves on air-sea CO2 exchange |
title_sort |
observed regional impacts of marine heatwaves on air-sea co2 exchange |
publisher |
Authorea, Inc. |
publishDate |
2024 |
url |
http://dx.doi.org/10.22541/essoar.171707892.29222066/v1 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_doi |
https://doi.org/10.22541/essoar.171707892.29222066/v1 |
_version_ |
1802650323010977792 |