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Validation and Improvement of the WRF Building Environment Parametrization (BEP) Urban Scheme

Department of Atmospheric and Oceanic Science, University of Maryland-College Park, Maryland, MD 20742, USA
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Climate 2019, 7(9), 109; https://doi.org/10.3390/cli7090109
Received: 7 May 2019 / Revised: 12 August 2019 / Accepted: 28 August 2019 / Published: 10 September 2019
(This article belongs to the Special Issue Urban Climate: Strategic Planning)
The building environment parameterization scheme (BEP) is a built-in “urban physics” scheme in the weather research and forecasting (WRF) model. The urbanized College Park (CP) in Maryland state (MD) in the United States (US) covers an approximate land area of 14.8 km2 and has a population of 32,000 (reported by The United States Census Bureau, as of 2017). This study was an effort to validate and improve the BEP urban physics scheme for a small urban setting, College Park, MD. Comparing the WRF/BEP-simulated two-meter air temperatures with the local rooftop WeatherBug® observations and with the airport observations, systemic deficiencies in BEP for urban heat island effect simulation are evident. Specifically, WRF/BEP overestimates the two-meter air temperature by about 10 °F during clear summer nights and slightly underestimates it during noon of the same days by about 1–3 °F. Similar deficiencies in skin temperature simulations are also evident in WRF/BEP. Modification by adding an anthropogenic heat flux term resulted in better estimates for both skin and two-meter air temperatures on diurnal and seasonal scales. View Full-Text
Keywords: WRF; BEP; urban heat island effect; urban dynamic system WRF; BEP; urban heat island effect; urban dynamic system
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Gohil, K.; Jin, M.S. Validation and Improvement of the WRF Building Environment Parametrization (BEP) Urban Scheme. Climate 2019, 7, 109.

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