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Automated, High-resolution Mobile Collection System for the Nitrogen Isotopic Analysis of NOx
Published on: December 20, 2016
Dióxido de nitrógeno estratosférico en las cercanías de Soufriere, St. Vincent
Resumen
Las mediciones de dióxido de nitrógeno en la atmósfera superior revelaron un aumento del 25% cerca del volcán Soufriere. Este aumento puede representar la variabilidad estratosférica normal o un límite superior del impacto volcánico.
Área de la Ciencia:
- Química atmosférica La química atmosférica es la química de la atmósfera.
- Volcanología Volcanología.
- La teledetección es la sensorización remota.
Sus antecedentes:
- Comprender el impacto de las erupciones volcánicas en la composición atmosférica es crucial.
- El dióxido de nitrógeno (NO2) juega un papel importante en la química de la estratosfera.
- Las mediciones anteriores de NO2 estratosférico existían para las regiones ecuatoriales.
Objetivo del estudio:
- Para medir las concentraciones de dióxido de nitrógeno (NO2) en la atmósfera superior cerca del volcán Soufriere.
- Para evaluar el potencial aumento volcánico del NO2 estratosférico.
- Para determinar un límite superior para el efecto del volcán en la abundancia de NO2.
Principales métodos:
- Utilizó técnicas de absorción óptica de crepúsculo para mediciones atmosféricas.
- Mediciones realizadas en abril de 1979 cerca del volcán Soufriere.
- Densidades calculadas de la columna de dióxido de nitrógeno.
Principales resultados:
- Se obtuvo una densidad de columna de dióxido de nitrógeno de 5 x 1015 moléculas por centímetro cuadrado.
- Este valor indica una mejora del 25% en comparación con las abundancias previamente medidas en regiones latitudinales similares.
- La mejora observada proporciona un límite superior para el impacto volcánico en el NO2.
Conclusiones:
- El aumento medido del dióxido de nitrógeno estratosférico cerca del volcán Soufriere puede atribuirse a la variabilidad estratosférica natural.
- Los hallazgos establecen un límite superior para la influencia del volcán en el NO2 atmosférico total.
- Investigaciones adicionales podrían diferenciar entre fuentes volcánicas y naturales de la variabilidad del NO2.
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