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Published on: December 10, 2019
Composición de la atmósfera inferior de Venus: análisis por cromatografía de gases.
Resumen
La cromatografía de gas revela la presencia de Venus.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Química de la atmósfera La química de la atmósfera
- La cromatografía de gas es una cromatografía de gas.
Sus antecedentes:
- La composición de la atmósfera inferior de Venus es crucial para comprender su temperatura superficial extrema y la dinámica atmosférica.
- Las observaciones anteriores basadas en la Tierra sugirieron gradientes en los componentes atmosféricos, insinuando procesos químicos complejos.
Objetivo del estudio:
- Para llevar a cabo el primer análisis cromatográfico de gases in situ de la atmósfera inferior de Venus.
- Para determinar las concentraciones precisas de los principales constituyentes atmosféricos.
- Proporcionar datos para validar los modelos atmosféricos y de efecto invernadero de Venus.
Principales métodos:
- Recopilación y análisis de tres muestras atmosféricas de la atmósfera inferior de Venus.
- Utilizó cromatografía de gases para un análisis preciso de la composición.
Principales resultados:
- La tercera muestra atmosférica incluía 96,4% de dióxido de carbono, 3,41% de nitrógeno molecular, 0,135% de vapor de agua y 186 ppm de dióxido de azufre.
- Los gases traza detectados incluyeron oxígeno molecular (69,3 ppm), argón (18,6 ppm) y neón (4,31 ppm).
- Las abundancias medidas de vapor de agua y dióxido de azufre se alinean con los requisitos del modelo de invernadero para la alta temperatura de la superficie de Venus.
Conclusiones:
- Los niveles detectados de vapor de agua y dióxido de azufre apoyan los modelos de efecto invernadero que explican la alta temperatura superficial de Venus.
- Los gradientes observados de dióxido de azufre, oxígeno molecular y vapor de agua apoyan la presencia de nubes acuosas de ácido sulfúrico.
- El inventario de gases inertes sugiere la desgasificación planetaria como el origen de los componentes atmosféricos de Venus, la Tierra y Marte.
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