Land-atmosphere interactions over urban terrain
Speaker: Dan Li, Graduate Student
Series: EEWR Brown Bag Seminars
Location: Engineering Quad E225
Date/Time: Friday, October 12, 2012, 12:00 p.m. - 1:00 p.m.
Urban heat island effect is induced by urban-rural land surface contrasts, but is modulated by weather systems. This study tries to combine in-situ and satellite observations, high-resolution numerical simulations, and simple analytical models to address the interaction between urban heat islands and heat waves. A positive feedback is observed between urban heat islands and heat waves. That is, during heat waves, cities are hotter than the rural areas, as expected; but the urban-rural contrast is larger compared to that before or after heat waves.
Much effort has been devoted to improving the parameterization for land-atmosphere interactions over urban terrain in the Weather Research and Forecasting (WRF) model. A newly-developed urban canopy model (UCM) is implemented into the WRF model. The coupled WRF-UCM enables further investigation of mitigation strategies for urban heat islands.