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Title: Assessing transboundary-local aerosols interaction over complex terrain using a doppler LiDAR network
Authors: Huang, Tao
Li, Yue
Cheng, Jack C. H.
Haywood, Jim
Hon, K. K.
Lam, David H. Y.
Lee, Olivia S. M.
Lolli, Simone
O'Connor, Ewan James
Lee, Harry F.
Wang, Mengya
Yim, Steve Hung Lam
Keywords: Engineering::Environmental engineering
Issue Date: 2021
Source: Huang, T., Li, Y., Cheng, J. C. H., Haywood, J., Hon, K. K., Lam, D. H. Y., Lee, O. S. M., Lolli, S., O'Connor, E. J., Lee, H. F., Wang, M. & Yim, S. H. L. (2021). Assessing transboundary-local aerosols interaction over complex terrain using a doppler LiDAR network. Geophysical Research Letters, 48(12), e2021GL093238-.
Journal: Geophysical Research Letters
Abstract: Transboundary-local aerosols interaction requires to be comprehensively understood in urban air quality research. A year-long intensive observation of the atmospheric boundary layer (ABL) at multiple sites in Hong Kong was conducted using a four-Doppler Light Detection and Ranging (LiDAR) network with different scanning modes. Results show that heterogeneity of the ABL in terms of mixing layer height and wind shear was induced by orographic topography. Interaction between local and advected aerosol layers during a transboundary air pollution (TAP) episode was identified by the network. During TAP episode, downward transport of transboundary aerosol relied on small scale eddies with weak wind speed in nighttime, while the transport of surface local aerosol to upper level was the dominated process in daytime, but the heterogeneity of the ABL affected by terrain determined the capacity of the mixing, eventually resulting in the opposite transport direction of aerosols in the transboundary-local aerosols interaction.
ISSN: 0094-8276
DOI: 10.1029/2021GL093238
Rights: © 2021 American Geophysical Union. All Rights Reserved. This paper was published in Geophysical Research Letters and is made available with permission of American Geophysical Union.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ASE Journal Articles

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