Paper Info
Title
Comparison of Total Column and Surface Mixing Ratio of Carbon Monoxide Derived from the TROPOMI/Sentinel-5 Precursor with In-Situ Measurements from Extensive Ground-Based Network over South Korea
Abstract
Atmospheric carbon monoxide (CO) significantly impacts climate change and human health, and has become the focus of increased air quality and climate research. Since 2018, the Troposphere Monitoring Instrument (TROPOMI) has provided total column amounts of CO (C-TROPOMI) with a high spatial resolution to monitor atmospheric CO. This study compared and assessed the accuracy of C-TROPOMI measurements using surface in-situ measurements (S-KME) obtained from an extensive ground-based network over South Korea, where CO level is persistently affected by both local emissions and trans-boundary transport. Our analysis reveals that the TROPOMI effectively detected major emission sources of CO over South Korea and efficiently complemented the spatial coverage of the ground-based network. In general, the correlations between C-TROPOMI and S-KME were lower than those for NO2 reported in a previous study, and this discrepancy was partly attributed to the lower spatiotemporal variability. Moreover, vertical CO profiles were sampled from the ECMWF CAMS reanalysis data (EAC4) to convert C-TROPOMI to surface mixing ratios (S-TROPOMI). S-TROPOMI showed a significant underestimation compared with S-KME by approximately 40%, with a moderate correlation of approximately 0.51. The low biases of S-TROPOMI were more significant during the winter season, which was mainly attributed to the underestimation of the EAC4 CO at the surface. This study can contribute to the assessment of satellite and model data for monitoring surface air quality and greenhouse gas emissions.
Year
DOI
Venue
2021
10.3390/rs13193987
REMOTE SENSING
Keywords
DocType
Volume
carbon monoxide, TROPOMI, surface mixing ratio, Korea, EAC4, climate, air quality
Journal
13
Issue
Citations 
PageRank 
19
0
0.34
References 
Authors
0
2
Name
Order
Citations
PageRank
Ukkyo Jeong163.96
Hyunkee Hong262.77