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Echo Particle Image Velocimetry
Published on: December 27, 2012
El impacto de las inyecciones de aerosoles volcánicos hemisféricamente asimétricos en la Oscilación del Atlántico
Olivia T Woods1, James U L Baldini2
1Department of Earth Sciences, Durham University, Durham, DH1 3LE, UK.
Scientific reports
|August 26, 2025
Resumen
Las grandes erupciones volcánicas del hemisferio norte se correlacionan significativamente con una respuesta positiva de la Oscilación del Atlántico Norte (NAO). Esta relación parece fortalecerse en las últimas décadas, potencialmente influenciada por factores antropogénicos.
Área de la Ciencia:
- Ciencias del clima
- Ciencias atmosféricas
- Volcanología
Sus antecedentes:
- Las erupciones volcánicas influyen significativamente en el clima global y la variabilidad atmosférica.
- La relación entre la actividad volcánica y la Oscilación del Atlántico Norte (NAO) carece de consenso debido a numerosos factores de confusión.
- Estudios anteriores muestran resultados contradictorios con respecto a los impactos volcánicos en el NAO.
Objetivo del estudio:
- Evaluar estadísticamente la relación entre las erupciones volcánicas históricas y la respuesta NAO observada desde principios del siglo XX.
- Determinar si las características de la erupción (ubicación hemisférica, magnitud) influyen en la respuesta de la NAO.
- Investigar posibles cambios en esta relación a lo largo del tiempo.
Principales métodos:
- Se utilizaron técnicas estadísticas, incluidos los análisis de Monte Carlo, para evaluar los datos históricos.
- Centrado en las grandes erupciones del hemisferio norte (Índice de Explosividad Volcánica 5 o mayor).
- Analizó la respuesta de NAO a lo largo del siglo XX y las últimas décadas.
Principales resultados:
- Se encontró una correlación positiva estadísticamente significativa entre las grandes erupciones del hemisferio norte y la respuesta NAO (nivel de significación del 1%).
- No se detectó una asociación significativa para las erupciones del hemisferio sur, posiblemente debido a los datos limitados.
- En las últimas décadas se observó una amplitud creciente de la respuesta de la NAO a las erupciones del hemisferio norte.
Conclusiones:
- Las erupciones volcánicas del hemisferio norte son un factor importante de las fases positivas de NAO.
- El impacto de las erupciones volcánicas en la NAO puede estar evolucionando, potencialmente debido al cambio climático antropogénico.
- Se necesita más investigación para confirmar los hallazgos de las erupciones del hemisferio sur y explorar los mecanismos detrás de la respuesta cambiante.
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