Diagnostic Downscaling of Large-Scale Wind Fields to Compute Local-Scale Trajectories

Abstract This paper describes a simple method, based on routine meteorological data, to produce high-resolution wind analyses throughout the planetary boundary layer (PBL). It is a new way to interpolate wind measurements. According to this method, high-frequency information from surface wind measurements is extrapolated to greater heights by assuming that the vertical shear of the horizontal wind, that is, the differential vertical wind profile, is horizontally more homogeneous than the wind profile itself. Under this assumption, it is sufficient to combine high-resolution surface wind measurements with low-resolution vertical profiles of differential winds—for which high-resolution measurements usually do not exist—to yield high-resolution wind analyses throughout the PBL. The method can thus be viewed as a diagnostic downscaling of large-scale wind fields. Downscaling works best during daytime within a homogeneous air mass and in flat terrain. A validation against sodar wind measurements demonstrates t...

[1]  A. Stohl,et al.  Validation of a Long-Range Trajectory Model Using Gas Balloon Tracks from the Gordon Bennett Cup 95 , 1997 .

[2]  Nicolas Moussiopoulos,et al.  Simulation of the wind field in Athens using refined boundary conditions , 1995 .

[3]  A. Stohl,et al.  A method for computing single trajectories representing boundary layer transport , 1995 .

[4]  Maurizio Brocchini,et al.  Calculation of a Mass-Consistent Two-Dimensional Wind Field with Divergence Control , 1995 .

[5]  A. Stohl,et al.  Interpolation Errors in Wind Fields as a Function of Spatial and Temporal Resolution and Their Impact on Different Types of Kinematic Trajectories , 1995 .

[6]  Glenn D. Rolph,et al.  Influence of grid size and terrain resolution on wind field predictions from an operational mesoscale model , 1995 .

[7]  F. Martín,et al.  A Simple Method for Spatial Interpolation of the Wind in Complex Terrain , 1995 .

[8]  Hendrik Feldmann,et al.  The use of nested models for air pollution studies: an application of the EURAD model to a SANA episode , 1995 .

[9]  David R. Miller,et al.  An interpretation of radiosonde errors in the atmospheric boundary layer , 1995 .

[10]  Laurence C. Breaker,et al.  The Application of a Technique for Vector Correlation to Problems in Meteorology and Oceanography , 1994 .

[11]  F. Ludwig,et al.  Evaluation of the WOCSS Wind Analysis Scheme for the San Francisco Bay Area , 1994 .

[12]  M. Piringer.  Selected results of a sodar intercomparison experiment , 1994 .

[13]  G. Carver,et al.  Accuracy of the isentropic trajectories calculated for the EASOE Campaign , 1994 .

[14]  Werner K. Graber,et al.  Windfeldmodellierung über komplexer Topographie durch Überlagerung skalenbezogener Prozesse und deren Anwendung auf den alpinen Luftmassenaustausch , 1993 .

[15]  H. Richner,et al.  Lokalwinde aus einer Analyse der potentiellen Temperatur auf einer meso-ß-Scale über komplexem Terrain während POLLUMET 1990 und 1991 , 1993 .

[16]  Laurence C. Breaker,et al.  A Proposed Definition for Vector Correlation in Geophysics: Theory and Application , 1993 .

[17]  Ionel M. Navon,et al.  An Optimal Nudging Data Assimilation Scheme Using Parameter Estimation , 1992 .

[18]  Steven R. Hanna,et al.  Representativeness of wind measurements on a mesoscale grid with station separations of 312 m to 10 km , 1992 .

[19]  F. L. Ludwig,et al.  Use of Mass Conservation and Critical Dividing Streamline concepts for Efficient Objective Analysis of Winds in Complex Terrain. , 1991 .

[20]  D. Strimaitis,et al.  Analysis of Tracer Data Collected during the SCCCAMP 1985 Intensive Measurement Periods , 1991 .

[21]  R. Daley.  Atmospheric Data Analysis , 1991 .

[22]  J. Kahl,et al.  Uncertainty in Estimating Boundary-Layer Transport during Highly Convective Conditions , 1988 .

[23]  R. Stull.  An Introduction to Boundary Layer Meteorology , 1988 .

[24]  D. Ross,et al.  Diagnostic Wind Field Modeling for Complex Terrain: Model Development and Testing , 1988 .

[25]  R. Berkowicz,et al.  Nocturnal boundary-layer height: Observations by acoustic sounders and predictions in terms of surface-layer parameters , 1988 .

[26]  J. Kahl,et al.  Uncertainty in Trajectory Calculations Due to Low Resolution Meteorological Data. , 1986 .

[27]  Nicolas Moussiopoulos,et al.  Two Vectorized Algorithms for the Effective Calculation of Mass-Consistent Flow Fields , 1986 .

[28]  S. F. Mueller,et al.  Comparisons of Tetroon and Computed Trajectories , 1983 .

[29]  J. Seinfeld,et al.  A Comparison of Interpolation Methods for Sparse Data: Application to Wind and Concentration Fields , 1979 .

[30]  C. Sherman.  A Mass-Consistent Model for Wind Fields over Complex Terrain. , 1978 .

[31]  J. Angell,et al.  Three-Dimensional Air Trajectories Determined from Tetroon Flights in the Planetary Boundary Layer of the Los Angeles Basin , 1972 .

[32]  K. Maßmeyer,et al.  Berechnung von Windfeldern über Nordrhein-Westfalen mit einem massenkonsistenten Windfeldmodell , 1995 .

[33]  Graeme Fairweather,et al.  The current state and future direction of Eulerian models in simulating the tropospheric chemistry and transport of trace species: a review , 1995 .

[34]  K. Schlünzen.  Mesoscale modelling in complex terrain ― an overview on the German nonhydrostatic models , 1994 .

[35]  William H. Press,et al.  Numerical Recipes in Fortran 77 , 1992 .

[36]  J. Snow,et al.  Characteristics of plume Releases as Depicted by Balloon Launchings and Model Simulations , 1990 .

[37]  Rohit Mathur,et al.  Adjustment of wind fields for application in air pollution modeling , 1990 .

[38]  B. Neininger.  Quasi-Lagrange'sche Turbulenzmessung mit Schwebeballonen in der planetaren Grenzschicht , 1987 .

[39]  William R. Goodin,et al.  An Objective Analysis Technique for Constructing Three-Dimensional Urban-Scale Wind Fields , 1980 .

[40]  J. Angell,et al.  ANALYSIS OF SOME PRELIMINARY LOW-LEVEL CONSTANT LEVEL BALLOON ( TETROON ) FLIGHTS , 1960 .

[41]  Sverre Petterssen,et al.  Weather analysis and forecasting , 1940 .

[42]  Air motion from potential temperature analysis on a meso-ß-scale over complex terrain during POLLUMET 1990 and 1991 , 2022 .