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April 24, 2026Atmospheric chemistry and physicsOpen Access

Observational insights into atmospheric CO 2 and CO at the urban canopy layer top in Metropolitan Shanghai, China

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Authors

SFShuang FuXQXuemei QingKZKunpeng Zang

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Overview

Observational campaign examines urban carbon emissions, highlighting the impact of anthropogenic activities in metropolitan areas.

Key Points

  • This research aims to investigate carbon dynamics, specifically CO2 and CO levels, from the urban canopy layer in Shanghai.
  • Conducted a nearly 2-year field campaign from the Shanghai Tower using high-precision in situ measurements.
  • Utilized a cavity ringdown laser spectrometer for continuous monitoring of CO2 and CO.
  • Implemented a multi-stage filtering framework to analyze nocturnal measurements and derive robust background values.
  • Campaign-averaged CO2 and CO levels significantly exceeded global background values, indicating high urban carbon burden.
  • Fossil fuel combustion was identified as the primary source of CO2 excess, contributing approximately 85%.
  • The study revealed the impact of the 2022 Shanghai lockdown on carbon emissions, showing significant declines and subsequent rebounds of CO2 and CO.

Cite This Study

Fu et al. (2026) studied this question.

synapsesocial.com/papers/69eb0bfa553a5433e34b5688https://doi.org/10.5194/acp-26-5477-2026
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