Seasonal forecasting of subsurface marine heatwaves

Abstract Marine heatwaves damage marine ecosystems and services, with effects identified mostly below the ocean surface. To create a truly user-relevant detection system, it is necessary to provide subsurface forecasts. Here, we demonstrate the feasibility of seasonal forecasting of subsurface marin...

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Main Authors: Ronan McAdam, Simona Masina, Silvio Gualdi
Format: Article
Language:English
Published: Nature Portfolio 2023-06-01
Series:Communications Earth & Environment
Online Access:https://doi.org/10.1038/s43247-023-00892-5
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author Ronan McAdam
Simona Masina
Silvio Gualdi
author_facet Ronan McAdam
Simona Masina
Silvio Gualdi
author_sort Ronan McAdam
collection DOAJ
description Abstract Marine heatwaves damage marine ecosystems and services, with effects identified mostly below the ocean surface. To create a truly user-relevant detection system, it is necessary to provide subsurface forecasts. Here, we demonstrate the feasibility of seasonal forecasting of subsurface marine heatwaves by using upper ocean heat content. We validate surface and subsurface events forecast by an operational dynamical seasonal forecasting system against satellite observations and an ocean reanalysis, respectively. We show that indicators of summer events (number of days, strongest intensity, and number of events) are predicted with greater skill than surface equivalents across much of the global ocean. We identify regions which do not display significant surface skill but could still benefit from accurate subsurface early warning tools (e.g., the mid-latitudes). The dynamical system used here outperforms a persistence model and is not widely influenced by warming trends, demonstrating the ability of the system to capture relevant subseasonal variability.
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spelling doaj.art-a9eaa72c9fdc423fb9e64827055955332023-07-02T11:27:37ZengNature PortfolioCommunications Earth & Environment2662-44352023-06-014111110.1038/s43247-023-00892-5Seasonal forecasting of subsurface marine heatwavesRonan McAdam0Simona Masina1Silvio Gualdi2Ocean modeling and Data Assimilation Division, Fondazione Centro Euro-Mediterraneo sui Cambiamenti Climatici—CMCCOcean modeling and Data Assimilation Division, Fondazione Centro Euro-Mediterraneo sui Cambiamenti Climatici—CMCCClimate Simulations and Predictions Division, Fondazione Centro Euro-Mediterraneo sui Cambiamenti Climatici—CMCCAbstract Marine heatwaves damage marine ecosystems and services, with effects identified mostly below the ocean surface. To create a truly user-relevant detection system, it is necessary to provide subsurface forecasts. Here, we demonstrate the feasibility of seasonal forecasting of subsurface marine heatwaves by using upper ocean heat content. We validate surface and subsurface events forecast by an operational dynamical seasonal forecasting system against satellite observations and an ocean reanalysis, respectively. We show that indicators of summer events (number of days, strongest intensity, and number of events) are predicted with greater skill than surface equivalents across much of the global ocean. We identify regions which do not display significant surface skill but could still benefit from accurate subsurface early warning tools (e.g., the mid-latitudes). The dynamical system used here outperforms a persistence model and is not widely influenced by warming trends, demonstrating the ability of the system to capture relevant subseasonal variability.https://doi.org/10.1038/s43247-023-00892-5
spellingShingle Ronan McAdam
Simona Masina
Silvio Gualdi
Seasonal forecasting of subsurface marine heatwaves
Communications Earth & Environment
title Seasonal forecasting of subsurface marine heatwaves
title_full Seasonal forecasting of subsurface marine heatwaves
title_fullStr Seasonal forecasting of subsurface marine heatwaves
title_full_unstemmed Seasonal forecasting of subsurface marine heatwaves
title_short Seasonal forecasting of subsurface marine heatwaves
title_sort seasonal forecasting of subsurface marine heatwaves
url https://doi.org/10.1038/s43247-023-00892-5
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AT simonamasina seasonalforecastingofsubsurfacemarineheatwaves
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