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Los aerosoles procedentes del extranjero compiten con las emisiones nacionales sobre América del Norte

Hongbin Yu¹, Lorraine A Remer, Mian Chin

¹Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, USA. hongbin.yu@nasa.gov

Science (New York, N.Y.)

|August 4, 2012

Resumen

El transporte transcontinental de aerosoles tiene un impacto significativo en la calidad del aire y el clima de América del Norte. Los aerosoles importados, principalmente el polvo asiático, compiten con las emisiones domésticas de partículas, lo que requiere controles de emisiones globales.

Área de la Ciencia:

Ciencias de la atmósfera Ciencias atmosféricas.
Ciencias ambientales Ciencias ambientales.
Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima

Sus antecedentes:

Los aerosoles pueden viajar largas distancias, influyendo en la calidad del aire y el clima a nivel mundial.
Comprender el transporte transcontinental de aerosoles es crucial para las regiones remotas.

Objetivo del estudio:

Para cuantificar la masa de aerosoles extranjeros que llegan a América del Norte.
Para evaluar la contribución de los aerosoles importados frente a las emisiones nacionales.

Principales métodos:

Estimación de la masa de aerosoles transportados a través de los continentes.
Comparación de la masa de aerosoles importados con las emisiones domésticas de partículas.

Principales resultados:

Los aerosoles extranjeros que llegan a América del Norte son comparables en masa a las emisiones domésticas de partículas.
El tipo de aerosol importado dominante es el polvo de Asia, no las partículas de combustión.

Conclusiones:

La reducción de las emisiones domésticas por sí sola es insuficiente para mitigar los impactos de los aerosoles en América del Norte.
El aumento de las emisiones de polvo de Asia, debido al cambio climático y la desertificación, podría anular las reducciones de emisiones industriales.

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