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La doble expansión de la piscina cálida del Indo-Pacífico deforma el ciclo de vida de la MJO
M K Roxy1,2, Panini Dasgupta3,4, Michael J McPhaden5
1Centre for Climate Change Research, Indian Institute of Tropical Meteorology, Pune, India. roxy@tropmet.res.in.
Nature
|November 29, 2019
Resumen
El ciclo de vida de la Oscilación Madden-Julian (MJO) está cambiando debido al calentamiento de los océanos. Su tiempo ha cambiado, impactando los patrones de lluvia a nivel mundial.
Área de la Ciencia:
- Ciencias del clima
- Ciencias atmosféricas
- La oceanografía
Sus antecedentes:
- La Oscilación Madden-Julian (MJO) es el principal impulsor de la variabilidad subestacional tropical.
- El MJO influye en los patrones climáticos globales, incluidos El Niño, los ciclones tropicales y los monzones.
- Los océanos tropicales se están calentando debido a las emisiones antropogénicas de gases de efecto invernadero.
Objetivo del estudio:
- Investigar el impacto del calentamiento del océano tropical en el ciclo de vida de la MJO.
- Para analizar los cambios en los tiempos de residencia de MJO y su relación con la piscina cálida del Indo-Pacífico.
Principales métodos:
- Análisis de los datos del ciclo de vida del MJO de 1981 a 2018.
- Cuantificación de los cambios en los tiempos de residencia de las OGM en el Océano Índico y el continente marítimo del Indo-Pacífico.
- Evaluación de la expansión de la piscina cálida del Indo-Pacífico y su correlación con los cambios en la MJO.
Principales resultados:
- El tiempo de residencia del MJO se redujo en 3-4 días sobre el Océano Índico.
- El tiempo de residencia del MJO aumentó en 5-6 días en el continente marítimo del Indo-Pacífico.
- La piscina cálida del Indo-Pacífico se ha expandido significativamente, a un ritmo acelerado desde 1981.
Conclusiones:
- El calentamiento del océano ha alterado el ciclo de vida del MJO.
- Los cambios en el MJO y la piscina cálida están relacionados con los cambios en los patrones de lluvia globales.
- Se necesita más investigación para comprender el comportamiento futuro de MJO bajo el calentamiento continuo.
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