CIENCIANATURALEZA

Cambio climático pasa factura a los océanos, entramos a la «hora de emergencia».

Un estudio publicado en la revista Nature Climate Change, concluye que el cambio climático ya le pasa factura a más de la mitad de los océanos.

Foto: Ciencia Plus.

El cambio de temperatura y los niveles de salinidad en las profundidades de los océanos afectan la circulación oceánica global e impacta el nivel del mar y representa una amenaza para los ecosistemas.

Foto: AFP

Además las capas de hielo que se han derretido en Groenlandia y la Antártida han elevado el nivel del mar en 1.8 cm en promedio anual desde los años 90.

El Instituto Meteorológico Danés, junto con la Universidad de Leeds, coincide que el aumento del nivel del mar registra hoy su peor diagnóstico.

Foto: NASA

Aumento de nivel del mar afectaría a millones de personas.

De seguir a este ritmo el derretimiento de glaciares, espera que las capas de hielo aumenten el nivel del mar uno 17 centímetros y pongan en peligro a 16 millones de personas que viven en las franjas costeras de las naciones con océanos.

Foto: Especial/Web

El Dr. Tom Slater, autor principal del estudio e investigador del clima en el Centro de Observación y Modelado Polar de la Universidad de Leeds, dijo que el deshielo está superando los modelos climáticos que usamos para guiarnos, y corremos el peligro de no estar preparados para los riesgos que plantea el aumento del nivel del mar.

Por su parte, el Dr. Eri Guilyardi, investigador de la Universidad de Reading y del Laboratorio de Oceanografía y Clima de París, dijo que hemos visto cambios en las temperaturas de los océanos en la superficie de las aguas por el cambio climático durante décadas, pero los cambios en amplias áreas del océano, particularmente en las profundidades, son mucho más difíciles de detectar.

El estudio en el impacto del cambio climático en los océanos, se había logrado a través de la medición de las temperaturas en la superficie de las aguas, el aumento del nivel del mar y las lluvias, pero no en las profundidades dada las dificultades para medir las temperaturas y los niveles de sal.

Foto: Chris Linder/WWF-US

Entramos a la “hora de emergencia”.

Se han realizado simulaciones de modelos para diagnosticar el impacto en la actividad humana, así como para determinar la combinación entre la temperatura y la sal del océano y detectar cambios significativos en los océanos y su fecha de detección probable, también conocida como «hora de emergencia».

Foto: WWF

Los expertos aclaran que se necesita observar la reacción que los océanos tienen, frente al impacto del cambio climático, y los ecosistemas, para predecir con mayor precisión el efecto más amplio que esto podría tener en el planeta.

Con información de ONU_Cambio Climático y Revista Nature Climate Change.

Somos Extremo Mundial.

 

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