Monday, 12 January 2009
The impact of high-resolution, satellite-derived urban parameters on urban-coastal meso-circulations
Hall 5 (Phoenix Convention Center)
A collaborative effort with the University of Utah, University of Georgia, San Jose State University, and DTRA has been established to (1) develop methods to derive urban land surface parameters in coastal regions directly from satellite data, (2) establish an urban aerosol amount-surface isolation reduction relationship from radiative transfer model simulations to improve representation of the land surface energy balance and resultant wind flow, and (3) assess the impact of remotely sensed urban parameters and the aerosol adjustments on the meso-circulations of the coupled WRF-NOAH-UCP modeling framework. Items (1) and (2) are reported elsewhere at the meeting. Here, we provide preliminary results from WRF-NOAH-UCP simulations of three case days conducted during the TEXAQS-II field campaign in and around Houston, Texas. We evaluated the performance of the model under 3 basic scenarios: No Urban, Simple Urban, and Remotely Sensed Urban. We analyzed standard dynamic and thermodynamic variables related to meso-circulations (e.g. stability, temperature, wind flow) and developed to new parameters based on recent literature: the convective pump parameters (CPP) and urban dwell time (UDT). We also hope to present results of preliminary trajectory analysis to understand how transport and dispersion are affected by different urban representation.