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La partición mar-aire del mercurio en el océano Pacífico ecuatorial
Science (New York, N.Y.)
|March 7, 1986
Resumen
El mercurio gaseoso en el Pacífico ecuatorial es más alto en aguas más frías y ricas en nutrientes. Es probable que esta región oceánica libere vapores de mercurio significativos a la atmósfera, lo que potencialmente coincide con las emisiones causadas por el hombre.
Área de la Ciencia:
- Química del medio ambiente Química del medio ambiente
- Oceanografía La oceanografía es la oceanografía.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- El mercurio es un contaminante ambiental persistente con importantes componentes atmosféricos y oceánicos.
- Comprender el intercambio aire-mar del mercurio es crucial para las evaluaciones globales del presupuesto de mercurio.
- El Pacífico ecuatorial es una región clave para las interacciones océano-atmósfera y el ciclo biogeoquímico.
Objetivo del estudio:
- Para cuantificar la partición del mercurio gaseoso entre la atmósfera y las aguas superficiales en el Pacífico ecuatorial.
- Identificar los factores que influyen en las concentraciones de mercurio en las aguas superficiales ecuatoriales del Pacífico.
- Para estimar el flujo de mercurio desde el océano Pacífico ecuatorial a la atmósfera.
Principales métodos:
- Mediciones de campo de mercurio gaseoso disuelto en aguas superficiales.
- Análisis de la temperatura del agua y las concentraciones de nutrientes.
- Cálculo de la saturación de mercurio y el flujo aire-mar previsto.
Principales resultados:
- Las concentraciones más altas de mercurio gaseoso disuelto se encontraron en zonas de surgimiento más frías y ricas en nutrientes.
- Las aguas superficiales estaban sobresaturadas con respecto al mercurio elemental.
- Se predice un flujo significativo de mercurio elemental a la atmósfera para esta región.
Conclusiones:
- Las corrientes ascendentes del Pacífico ecuatorial generan altas concentraciones de mercurio en las aguas superficiales.
- El flujo oceánico de mercurio desde el Pacífico ecuatorial es sustancial.
- Las emisiones mundiales de mercurio del océano, particularmente de esta región, pueden rivalizar con las fuentes antropogénicas.
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