Impacts of an urban density gradient on land-atmosphere turbulent heat fluxes across seasonal timescales

Surface energy partitioning directly connects to the urban heat island effect, which consequently changes regional climate, the health of the urban dwellers, and anthropogenic energy use. In order to quantify land-atmosphere fluxes from urban areas and the impact of the level of intensity of develop...

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Bibliographic Details
Published in:Theoretical and applied climatology 2024-09, Vol.155 (9), p.8557-8566
Main Authors: Reed, David E., Lei, Cheyenne, Baule, William, Shirkey, Gabriela, Chen, Jiquan, Czajkowski, Kevin P., Ouyang, Zutao
Format: Article
Language:English
Subjects:
Anthropogenic factors
Aquatic Pollution
Atmosphere
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Atmospheric turbulence
Bowen ratio
climate
Climate and health
Climate change
Climatology
Density
Density gradients
Earth and Environmental Science
Earth Sciences
energy
Energy consumption
Enthalpy
Evapotranspiration
Heat
Heat flux
heat island
Heat transfer
Human influences
Island effects
Latent heat
Original Paper
Potential evapotranspiration
Redevelopment
Regional climates
Regional development
Rivers
Sensible heat
Surface energy
Surface properties
temperature
Urban areas
Urban heat islands
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Surface energy partitioning directly connects to the urban heat island effect, which consequently changes regional climate, the health of the urban dwellers, and anthropogenic energy use. In order to quantify land-atmosphere fluxes from urban areas and the impact of the level of intensity of development, we use seven site-years of land-atmosphere flux data from three locations averaged to seasonal timescales through binning by temperature. Additionally, all three of our study sites include urban rivers, allowing us to examine urban areas with high and low amounts of potential evapotranspiration. As expected, the urban river decreases the Bowen Ratio of observed fluxes, primarily through lowering sensible heat fluxes. Latent heat fluxes are positively correlated with urban density with coming from the river areas and negatively correlated with latent and sensible heat fluxes when coming from the urban river. We conclude that effective urban redevelopment guidelines can adopt this knowledge to decrease the urban heat island effect and reach sustainability targets to counteract increased temperatures from climate change.
ISSN:0177-798X
1434-4483
DOI:10.1007/s00704-024-05133-z