Black carbon lofts wildfire smoke high into the stratosphere to form a persistent plume.
Science
; 365(6453): 587-590, 2019 08 09.
Article
em En
| MEDLINE
| ID: mdl-31395782
ABSTRACT
In 2017, western Canadian wildfires injected smoke into the stratosphere that was detectable by satellites for more than 8 months. The smoke plume rose from 12 to 23 kilometers within 2 months owing to solar heating of black carbon, extending the lifetime and latitudinal spread. Comparisons of model simulations to the rate of observed lofting indicate that 2% of the smoke mass was black carbon. The observed smoke lifetime in the stratosphere was 40% shorter than calculated with a standard model that does not consider photochemical loss of organic carbon. Photochemistry is represented by using an empirical ozone-organics reaction probability that matches the observed smoke decay. The observed rapid plume rise, latitudinal spread, and photochemical reactions provide new insights into potential global climate impacts from nuclear war.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fumaça
/
Incêndios Florestais
/
Ozônio Estratosférico
País/Região como assunto:
America do norte
Idioma:
En
Revista:
Science
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Estados Unidos