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El transporte de dióxido de carbono por las corrientes oceánicas a 25oN de latitud en el Océano Atlántico
Science (New York, N.Y.)
|October 27, 1989
Resumen
El Océano Atlántico Norte mostró un flujo neto sorprendentemente pequeño de dióxido de carbono (CO2) en 1988, contrariamente a las expectativas. Este estudio revela que el océano es un sumidero más grande para el oxígeno (O2) que para el CO2 atmosférico.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Biogeoquímica La biogeoquímica es la bioquímica.
- Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- El Océano Atlántico Norte es tradicionalmente visto como un sumidero significativo para el dióxido de carbono atmosférico (CO2).
- La comprensión del intercambio de gases oceánicos es crucial para el modelado del clima y la predicción de las futuras concentraciones de CO2 atmosférico.
Objetivo del estudio:
- Para cuantificar el transporte bruto y neto de dióxido de carbono (CO2) y oxígeno (O2) a través del Estrecho de la Florida y en el Océano Atlántico a aproximadamente 25 grados N.
- Para evaluar el flujo neto de CO2 entre la atmósfera y el Océano Atlántico Norte en 1988.
Principales métodos:
- Las concentraciones medidas de CO2, O2 y especies químicas relacionadas.
- Mediciones químicas combinadas con estimaciones del transporte de masas oceánico.
- Flujos calculados hacia el norte y hacia el sur para CO2 y O2
Principales resultados:
- Un flujo neto de CO2 de 0,7 x 10 mol por segundo (0,26 +/- 0,03 gigatoneladas de carbono por año) se observó hacia el sur a través de 25 grados N en 1988.
- El transporte neto de O2 fue de 2,08 x 10 moles por segundo hacia el norte, tres veces el flujo neto de CO2.
- El papel del Océano Atlántico Norte como sumidero de CO2 fue menor de lo previsto, a pesar de la significativa pérdida de calor.
Conclusiones:
- El Océano Atlántico Norte actuó como un sumidero relativamente pequeño para el CO2 atmosférico en 1988.
- El océano era un sumidero más grande para O2 que para CO2 a esta latitud.
- Los efectos de bombeo térmico y químico influyen en los ciclos de CO2 y O2 de manera diferente, lo que afecta el intercambio neto de gases.
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