Article Type:
Research Article

Further Aspects of Large Eddy Simulation Model Statistics and Inconsistencies with Field Data

Ernest Agee Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana

Search for other papers by Ernest Agee in
Current site
Google Scholar
PubMed Close
and
Alexander Gluhovsky Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana

Search for other papers by Alexander Gluhovsky in
Current site
Google Scholar
PubMed Close
Print Publication:
01 Aug 1999
DOI:
https://doi.org/10.1175/1520-0469(1999)056<2948:FAOLES>2.0.CO;2
Page(s):
2948–2950
Restricted access

We are aware of a technical issue preventing figures and tables from showing in some newly published articles in the full-text HTML view.
While we are resolving the problem, please use the online PDF version of these articles to view figures and tables.

Abstract

This study has employed the concept of bandpass filtering of aircraft field data that are obtained within convective planetary boundary layers, for the purpose of comparing the characteristic turbulence statistics with the results of large eddy simulation (LES) models. Field data from Project LESS (10 January 1984) conducted over Lake Michigan in wintertime cold air outbreaks have been used to demonstrate the validity of the concept presented. These results show excellent agreement in variance statistics for LESS filtered data and LES model simulations; however, agreement in the skewness statistics is unsatisfactory. This is attributed to either the authors’ inability to design a proper bandpass filter or the lack of an adequate dataset for computing third-moment statistics.

Corresponding author address: Dr. Ernest M. Agee, Department of Earth and Atmospheric Sciences, Purdue University, 1397 CIVL Building, West Lafayette, IN 47907-1397.

Abstract

This study has employed the concept of bandpass filtering of aircraft field data that are obtained within convective planetary boundary layers, for the purpose of comparing the characteristic turbulence statistics with the results of large eddy simulation (LES) models. Field data from Project LESS (10 January 1984) conducted over Lake Michigan in wintertime cold air outbreaks have been used to demonstrate the validity of the concept presented. These results show excellent agreement in variance statistics for LESS filtered data and LES model simulations; however, agreement in the skewness statistics is unsatisfactory. This is attributed to either the authors’ inability to design a proper bandpass filter or the lack of an adequate dataset for computing third-moment statistics.

Corresponding author address: Dr. Ernest M. Agee, Department of Earth and Atmospheric Sciences, Purdue University, 1397 CIVL Building, West Lafayette, IN 47907-1397.

Save
Cover Journal of the Atmospheric Sciences
Journal of the Atmospheric Sciences

  • Agee, E. M., 1987: Mesoscale cellular convection over the oceans. Dyn. Atmos. Oceans,10, 317–341.

  • ——, and M. L. Hart, 1990: Boundary layer and mesoscale structure over Lake Michigan during a wintertime cold air outbreak. J. Atmos. Sci.,47, 2293–2316.

  • ——, and A. Gluhovsky, 1999: LES model sensitivities to domains, grids, and large eddy timescales. J. Atmos. Sci.,56, 599–604.

  • Gluhovsky, A., and E. Agee, 1994: A definitive approach to turbulence statistical studies in planetary boundary layers. J. Atmos. Sci.,51, 1682–1690.

  • Moeng, C.-H., and R. Rotunno, 1990: Vertical velocity skewness in the boundary layer. J. Atmos. Sci.,47, 1149–1162.

  • Rao, G.-S., and E. M. Agee, 1996: Large eddy simulation of turbulent flow in a marine convective boundary layer with snow. J. Atmos. Sci.,53, 86–100.

  • Rothermel, J., and E. M. Agee, 1980: Aircraft investigation of mesoscale cellular convection during AMTEX 75. J. Atmos. Sci.,37, 1027–1040.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 449 330 70
PDF Downloads 33 19 3