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Dinámica de las emisiones de carbono urbanas: un análisis comparativo de pre y post-bloqueo a través de mediciones de
Lu Zhao1, Hongxing Zhang2, Xu Sun2
1State Key Laboratory of Regional and Urban Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of environmental sciences (China)
|August 21, 2025
Resumen
El cierre por COVID-19 en Beijing redujo significativamente las emisiones de dióxido de carbono (CO2) urbanas en un 31.8% en 2020. Las reducciones se vincularon a las restricciones de actividad, destacando el transporte
Área de la Ciencia:
- Ciencias del medio ambiente
- Química de la atmósfera
- Ecología urbana
Sus antecedentes:
- Las zonas urbanas son las principales fuentes antropogénicas de dióxido de carbono atmosférico (CO2).
- El monitoreo a largo plazo de las emisiones de CO2 en las ciudades es crucial para comprender el cambio climático.
- La pandemia de COVID-19 proporcionó un experimento natural único para estudiar los impactos de la actividad humana en los flujos de CO2 urbanos.
Objetivo del estudio:
- Para analizar el impacto de las restricciones de COVID-19 en las emisiones de CO2 urbanas en Beijing.
- Investigar la relación entre el nivel de las medidas de confinamiento y las variaciones del flujo de CO2.
- Identificar los sectores clave que contribuyen a las emisiones de CO2 en las ciudades durante la pandemia.
Principales métodos:
- Se utilizó la técnica de covarianza de remolinos para analizar los datos de flujo de CO2 de 2015 a 2020.
- Flujo de CO2 comparado durante el período de confinamiento de COVID-19 de 2020 con los años anteriores (2015-2019).
- Variaciones evaluadas del flujo de CO2 en diferentes niveles de movilidad social y restricciones económicas.
Principales resultados:
- El flujo anual de CO2 en Beijing disminuyó un 31,8% en 2020 en comparación con 2019.
- Las reducciones de las emisiones de CO2 se correlacionaron directamente con el rigor de las restricciones aplicadas.
- Se observaron reducciones significativas de las emisiones durante las horas pico de tráfico por la mañana y por la noche, lo que implica el transporte.
Conclusiones:
- Las actividades relacionadas con el transporte son una de las principales causas de las emisiones de CO2 urbanas.
- La orientación hacia las fuentes de CO2 relacionadas con el transporte es una prioridad para las estrategias de reducción de emisiones urbanas.
- El monitoreo continuo del flujo de CO2 ayuda a la supervisión de las políticas y al logro de los objetivos de neutralidad de carbono.
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