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Title: A Case Study of the Weather Research and Forecasting Model Applied to the Joint Urban 2003 Tracer Field Experiment. Part 1. Wind and Turbulence

Journal Article · · Boundary-Layer Meteorology
ORCiD logo [1];  [1];  [1];  [2];  [3];  [2];  [4]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Aeris, Louisville, CO (United States)
  3. Citadel, Chicago, IL (United States)
  4. Science and Technology in Atmospheric Research (STAR), Boulder, CO (United States)
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We found that numerical-weather-prediction models are often used to supply the mean wind and turbulence fields for atmospheric transport and dispersion plume models as they provide dense horizontally- and vertically-resolved geographic coverage in comparison to typically sparse monitoring networks. Here, the Weather Research and Forecasting (WRF) model was run over the month-long period of the Joint Urban 2003 field campaign conducted in Oklahoma City and the simulated fields important to transport and dispersion models were compared to measurements from a number of sodars, tower-based sonic anemometers, and balloon soundings located in the greater metropolitan area. Time histories of computed wind speed, wind direction, turbulent kinetic energy (e), friction velocity (u* ), and reciprocal Obukhov length (1 / L) were compared to measurements over the 1-month field campaign. Vertical profiles of wind speed, potential temperature (θ ), and e were compared during short intensive operating periods. The WRF model was typically able to replicate the measured diurnal variation of the wind fields, but with an average absolute wind direction and speed difference of 35° and 1.9 m s-1 , respectively. Then, using the Mellor-Yamada-Janjic (MYJ) surface-layer scheme, the WRF model was found to generally underpredict surface-layer TKE but overpredict u* that was observed above a suburban region of Oklahoma City. The TKE-threshold method used by the WRF model’s MYJ surface-layer scheme to compute the boundary-layer height (h) consistently overestimated h derived from a θ gradient method whether using observed or modelled θ profiles.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1235664
Report Number(s):
LA-UR-14-27675; PII: 91
Journal Information:
Boundary-Layer Meteorology, Vol. 158, Issue 2; ISSN 0006-8314
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

References (20)

Description and Evaluation of the Characteristics of the NCAR High-Resolution Land Data Assimilation System journal June 2007
The integrated WRF/urban modelling system: development, evaluation, and applications to urban environmental problems journal January 2011
Evaluation of an Urban Canopy Parameterization in a Mesoscale Model Using VTMX and URBAN 2000 Data journal July 2005
Single-Column Model Intercomparison for a Stably Stratified Atmospheric Boundary Layer journal September 2005
Numerical Study of Convection Observed during the Winter Monsoon Experiment Using a Mesoscale Two-Dimensional Model journal October 1989
The Step-Mountain Eta Coordinate Model: Further Developments of the Convection, Viscous Sublayer, and Turbulence Closure Schemes journal May 1994
The Kain–Fritsch Convective Parameterization: An Update journal January 2004
The NCEP/NCAR 40-Year Reanalysis Project journal March 1996
Coupling a Single-Layer Urban Canopy Model with a Simple Atmospheric Model: Impact on Urban Heat Island Simulation for an Idealized Case journal January 2004
Urban heat island effect and its impact on boundary layer development and land–sea circulation over northern Taiwan journal July 2008
Observed Diurnal Cycle Climatology of Planetary Boundary Layer Height journal November 2010
Verification of a Mesoscale Data-Assimilation and Forecasting System for the Oklahoma City Area during the Joint Urban 2003 Field Project journal July 2006
Current research and future challenges in urban mesoscale modelling journal January 2007
Radiative transfer for inhomogeneous atmospheres: RRTM, a validated correlated-k model for the longwave journal July 1997
Urban and land surface effects on the 30 July 2003 mesoscale convective system event observed in the southern Great Plains journal January 2006
A Study of the Urban Boundary Layer Using Different Urban Parameterizations and High-Resolution Urban Canopy Parameters with WRF journal May 2011
An Introduction to Boundary Layer Meteorology book January 1988
Impact of coupling a microscale computational fluid dynamics model with a mesoscale model on urban scale contaminant transport and dispersion journal June 2010
Explicit Forecasts of Winter Precipitation Using an Improved Bulk Microphysics Scheme. Part II: Implementation of a New Snow Parameterization journal December 2008
Evaluation of the coupling between mesoscale-WRF and LES‐EULAG models for simulating fine-scale urban dispersion journal November 2012

Cited By (2)

A New Scheme for the Simulation of Microscale Flow and Dispersion in Urban Areas by Coupling Large-Eddy Simulation with Mesoscale Models journal December 2017
Assessment of Planetary-Boundary-Layer Schemes in the Weather Research and Forecasting Model Within and Above an Urban Canopy Layer journal March 2018

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Related Subjects

54 ENVIRONMENTAL SCIENCES
QUIC
WRF
ASL turbulence
Atmospheric surface-layer winds Turbulence
Urban transport and dispersion
Vertical structure
Weather Research and Forecasting