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Open AccessArticle

Response of Near-Surface Meteorological Conditions to Advection under Impact of the Green Roof

1
Meteorology, Florida Institute of Technology, Melbourne, FL 32901, USA
2
IBM, Thomas J. Watson Research Center, Yorktown Heights, NY 10598, USA
3
The New York University Abu Dhabi, Center for Prototype Climate Modelling, Abu Dhabi 129188, UAE
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(12), 759; https://doi.org/10.3390/atmos10120759
Received: 6 November 2019 / Revised: 25 November 2019 / Accepted: 27 November 2019 / Published: 29 November 2019
(This article belongs to the Section Meteorology)
Due to rapid urbanization, the near-surface meteorological conditions over urban areas are greatly modulated. To capture such modulations, sophisticated urban parameterizations with enhanced hydrological processes have been developed. In this study, we use the single-layer urban canopy model (SLUCM) available within the Weather Research and Forecasting (WRF) model to assess the response of near-surface temperature, wind, and moisture to advection under the impact of the green roof. An ensemble of simulations with different planetary boundary layer (PBL) schemes is conducted in the presence (green roof (GR)) and absence (control (CTL)) of green roof systems. Our results indicate that the near-surface temperature is found to be driven primarily by the surface heat flux with a minor influence from the zonal advection of temperature. The momentum budget analysis shows that both zonal and meridional momentum advection during the evening and early nighttime plays an important role in modulating winds over urban areas. The near-surface humidity remains nearly unchanged in GR compared to CTL, although the physical processes that determine the changes in humidity were different, in particular during the evening when the GR tends to have less moisture advection due to the reduced temperature gradient between the urban areas and the surroundings. Implications of our results are discussed.
Keywords: urban heat island; Houston; green roof; advection; SLUCM urban heat island; Houston; green roof; advection; SLUCM
MDPI and ACS Style

Tan, H.; Ray, P.; Brownlee, J.; Tewari, M.; Ravindran, A. Response of Near-Surface Meteorological Conditions to Advection under Impact of the Green Roof. Atmosphere 2019, 10, 759.

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