Articles | Volume 21, issue 22
Atmos. Chem. Phys., 21, 17079–17097, 2021
https://doi.org/10.5194/acp-21-17079-2021
Atmos. Chem. Phys., 21, 17079–17097, 2021
https://doi.org/10.5194/acp-21-17079-2021

Research article 24 Nov 2021

Research article | 24 Nov 2021

Investigation of near-global daytime boundary layer height using high-resolution radiosondes: first results and comparison with ERA5, MERRA-2, JRA-55, and NCEP-2 reanalyses

Jianping Guo et al.

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Short summary
The planetary boundary layer (PBL) is the lowest part of the troposphere, and boundary layer height (BLH) is the depth of the PBL and is of critical importance to the dispersion of air pollution. The study presents the first near-global BLH climatology by using high-resolution (5-10 m) radiosonde measurements. The variations in BLH exhibit large spatial and temporal dependence, with a peak at 17:00 local solar time. The most promising reanalysis product is ERA-5 in terms of modeling BLH.
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