Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/15497
Título: Vertical profiles of Ozone concentration collected by an Unmanned Aerial Vehicle and the mixing of the Nighttime Boundary Layer over an Amazonian Urban Area
Autor: Guimarães, Patrícia Costa
Ye, Jianhuai
Batista, Carla E.
Barbosa, Rafael G.
Ribeiro, Igor Oliveira
Medeiros, Adan Sady S.
Souza, Rodrigo Augusto Ferreira de
Martin, Scot T.
Palavras-chave: Antennas
Boundary Layer Flow
Forestry
Mixing
Ozone
Ozone Layer
Unmanned Aerial Vehicles (uav)
Above Ground Level
Amazonia
Boundary Layer Heights
Chemical Transport Models
Nighttime Boundary Layers
Ozone Concentration
Potential Temperature
Temporal Resolution
Boundary Layers
Boundary Layer
Concentration (composition)
Heat Island
Ozone
Turbulent Mixing
Unmanned Vehicle
Urban Area
Vertical Profile
Amazonia
Data do documento: 2019
Revista: Atmosphere
É parte de: Volume 10, Número 10
Abstract: The nighttime boundary layer was studied in an urban area surrounded by tropical forest by use of a copter-type unmanned aerial vehicle (UAV) in central Amazonia during the wet season. Fifty-seven vertical profiles of ozone concentration, potential temperature, and specific humidity were collected from surface to 500 m above ground level (a.g.l.) at high vertical and temporal resolutions by use of embedded sensors on the UAV. Abrupt changes in ozone concentration with altitude served as a proxy of nighttime boundary layer (NBL) height for the case of a normal, undisturbed, stratified nighttime atmosphere, corresponding to 40% of the cases. The median height of the boundary layer was 300 m. A turbulent mixing NBL constituted 28% of the profiles, while the median height of the boundary layer was 290 m. The remaining 32% of profiles corresponded to complex atmospheres without clear boundary layer heights. The occurrence of the three different cases correlated well with relative cloud cover. The results show that the standard nighttime model widely implemented in chemical transport models holds just 40% of the time, suggesting new challenges in modeling of regional nighttime chemistry. The boundary layer heights were also somewhat higher than observed previously over forested and pasture areas in Amazonia, indicating the important effect of the urban heat island. © 2019 by the authors.
DOI: 10.3390/atmos10100599
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