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El ozono troposférico tropical y la quema de biomasa queman el ozono troposférico tropical y la biomasa
A M Thompson1, J C Witte, R D Hudson
1NASA-Goddard Space Flight Center, Code 916, Greenbelt, MD 20771, USA. anne.m.thompson@gsfc.nasa.gov
Science (New York, N.Y.)
|March 17, 2001
Resumen
Nuevos métodos revelan que los incendios indonesios crearon columnas de ozono que llegaron a la India, influenciadas por El Niño. El análisis del ozono troposférico y los aerosoles de humo muestran variabilidad regional, pero no hay una tendencia clara en la década de 1980.
Área de la Ciencia:
- Ciencias de la atmósfera ciencia atmosférica.
- La teledetección es la sensorización remota.
- Investigación de la capa de ozono.
Sus antecedentes:
- El ozono troposférico y los aerosoles absorbentes tienen un impacto significativo en la calidad del aire y el clima.
- Comprender su variabilidad y tendencias es crucial para el monitoreo ambiental.
- Estudios anteriores han explorado los vínculos entre los aerosoles, el ozono y los fenómenos climáticos como El Niño.
Objetivo del estudio:
- Desarrollar y aplicar nuevos métodos para recuperar la profundidad de la columna de ozono troposférico y absorber aerosoles (humo y polvo) utilizando datos del espectrómetro de mapeo de ozono total de Earth Probe (EP/TOMS).
- Investigar la variabilidad interanual y las tendencias del ozono troposférico y los aerosoles.
- Para analizar el impacto de eventos importantes como los incendios de Indonesia y El Niño en la composición atmosférica regional.
Principales métodos:
- Se utilizaron nuevos algoritmos de recuperación para el ozono troposférico y los aerosoles absorbentes a partir de datos satelitales EP/TOMS.
- Se analizaron datos de agosto a noviembre de 1997, centrándose en los intensos incendios indonesios.
- Comparó los hallazgos de EP/TOMS con los datos de Nimbus 7 TOMS de la década de 1980 para el análisis de tendencias.
Principales resultados:
- Se observaron columnas de ozono distintas, desacopladas de los aerosoles de humo, que se extendían desde Indonesia a la India durante los incendios de 1997.
- Se identificó un aumento regional del ozono relacionado con las respuestas atmosféricas a El Niño y el dipolo del Océano Índico.
- Los datos de Nimbus 7 TOMS indicaron señales de El Niño en el ozono troposférico y aerosoles de humo, pero no revelaron ninguna tendencia significativa en el ozono troposférico durante la década de 1980.
Conclusiones:
- Nuevos métodos basados en satélites rastrean efectivamente la contaminación y evalúan la variabilidad atmosférica.
- Los grandes incendios pueden generar una contaminación generalizada del ozono, influenciada por los patrones climáticos a gran escala.
- La variabilidad del ozono tropical troposférico está impulsada por múltiples factores, con desplazamientos estacionales entre el humo y el ozono que sugieren interacciones complejas.
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