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Las olas de calor marinas récord de 2023

Tianyun Dong1,2,3, Zhenzhong Zeng1,2,3, Ming Pan4

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2023 vio olas de calor marinas (MHW) récord a nivel mundial, impulsadas por factores como el aumento de la radiación solar y las corrientes oceánicas alteradas. Estos fenómenos extremos ponen de relieve los crecientes impactos del cambio climático en los ecosistemas marinos.

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Área de la Ciencia:

  • La oceanografía
  • Ciencias del clima
  • Biología marina

Sus antecedentes:

  • 2023 experimentará olas de calor marinas sin precedentes a nivel mundial.
  • Se observó una duración, extensión e intensidad récord de los MHW.
  • La actividad de MHW superó las normas históricas en más de tres desviaciones estándar.

Objetivo del estudio:

  • Analice los impulsores de las olas de calor marinas de 2023.
  • Investigar las variaciones regionales en las causas de la MHW.
  • Evaluar el impacto del cambio climático en los fenómenos marinos extremos.

Principales métodos:

  • Se han utilizado datos diarios de alta resolución ECCO2.
  • Se llevó a cabo un análisis del presupuesto de calor en capas mixtas.
  • Modelos de flujo y advección de calor específicos de la región identificados.

Principales resultados:

  • Los MHW del Atlántico Norte y el Pacífico Norte impulsados por un flujo de onda corta mejorado y capas mixtas más poco profundas.
  • Los MHW del suroeste del Pacífico están relacionados con la reducción de la cobertura de nubes y el aumento de la advección.
  • MHW del Pacífico oriental tropical influenciado por la advección oceánica.

Conclusiones:

  • Los MHW de 2023 demuestran los efectos intensificados del calentamiento climático.
  • La comprensión de los factores regionales es crucial para predecir eventos marinos extremos.
  • Se necesita más investigación para abordar los desafíos planteados por estos eventos.