Spatiotemporal Analysis of Black Carbon Sources: Case of Santiago, Chile, under SARS-CoV-2 Lockdowns.
Int J Environ Res Public Health
; 19(24)2022 12 19.
Artículo
en Inglés
| MEDLINE | ID: covidwho-2166576
ABSTRACT
BACKGROUND:
The SARS-CoV-2 pandemic has temporarily decreased black carbon emissions worldwide. The use of multi-wavelength aethalometers provides a quantitative apportionment of black carbon (BC) from fossil fuels (BCff) and wood-burning sources (BCwb). However, this apportionment is aggregated local and non-local BC sources are lumped together in the aethalometer results.METHODS:
We propose a spatiotemporal analysis of BC results along with meteorological data, using a fuzzy clustering approach, to resolve local and non-local BC contributions. We apply this methodology to BC measurements taken at an urban site in Santiago, Chile, from March through December 2020, including lockdown periods of different intensities.RESULTS:
BCff accounts for 85% of total BC; there was up to an 80% reduction in total BC during the most restrictive lockdowns (April-June); the reduction was 40-50% in periods with less restrictive lockdowns. The new methodology can apportion BCff and BCwb into local and non-local contributions; local traffic (wood burning) sources account for 66% (86%) of BCff (BCwb).CONCLUSIONS:
The intensive lockdowns brought down ambient BC across the city. The proposed fuzzy clustering methodology can resolve local and non-local contributions to BC in urban zones.Palabras clave
Texto completo:
Disponible
Colección:
Bases de datos internacionales
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Atmosféricos
/
COVID-19
Tipo de estudio:
Estudio observacional
Límite:
Humanos
País/Región como asunto:
America del Sur
/
Chile
Idioma:
Inglés
Año:
2022
Tipo del documento:
Artículo
País de afiliación:
Ijerph192417064
Similares
MEDLINE
...
LILACS
LIS