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Calentamiento del agua de fondo en el Océano Pacífico Norte
Masao Fukasawa1, Howard Freeland, Ron Perkin
1Ocean Observation and Research Department, Japan Marine Science and Technology Centre, Yokosuka, 237-0061, Japan. fksw@jamstec.go.jp
Nature
|February 27, 2004
Resumen
Las aguas oceánicas más profundas en el Pacífico Norte se han calentado significativamente, lo que indica cambios detectables incluso en las masas de agua aisladas. Este hallazgo tiene implicaciones para comprender la circulación oceánica y el cambio climático.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- La geofísica es la geofísica.
Sus antecedentes:
- Observar los cambios en las aguas oceánicas profundas es un desafío debido a las pequeñas magnitudes de la señal.
- Los cambios temporales en las propiedades de las aguas profundas son cruciales para comprender el transporte oceánico y la circulación termohalina.
Objetivo del estudio:
- Para comparar los datos oceanográficos del Pacífico Norte de 1985 y 1999.
- Detectar y analizar cambios en las propiedades de las aguas oceánicas profundas a través de la cuenca del Pacífico Norte.
Principales métodos:
- Se utilizaron datos de un estudio oceanográfico transpacífico realizado en 1985.
- Comparó estos datos históricos con una encuesta repetida de 1999.
- Analizó la temperatura y los cambios de propiedades en masas de aguas profundas.
Principales resultados:
- Calentamiento significativo detectado en las aguas más profundas del Océano Pacífico Norte.
- El calentamiento se observa en toda la anchura de la cuenca oceánica.
- Los cambios en las propiedades de las aguas profundas ahora son medibles, incluso en masas de agua aisladas.
Conclusiones:
- El calentamiento de las profundidades oceánicas se está produciendo en el Pacífico Norte, lo que desafía las suposiciones anteriores sobre el aislamiento.
- Estos hallazgos sugieren impactos detectables en masas de agua que anteriormente se pensaba que estaban aisladas de la influencia atmosférica.
- Los cambios observados proporcionan nuevas restricciones al transporte de agua del océano y a los patrones de circulación termohalina global.
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