Comparisons of "gray zone" simulations with one- and three-dimensional planetary boundary layer parameterizations and upscaled large eddy simulations over coastal central California.
Saved in:
| Title: | Comparisons of "gray zone" simulations with one- and three-dimensional planetary boundary layer parameterizations and upscaled large eddy simulations over coastal central California. |
|---|---|
| Authors: | A. Hendricks, Eric1 (AUTHOR) erichend@ucar.edu, W. Juliano, Timothy1 (AUTHOR), Ellen Haupt, Sue1 (AUTHOR), A. Sauer, Jeremy1 (AUTHOR), Muñoz-Esparza, Domingo1 (AUTHOR), Kosović, Branko2 (AUTHOR) |
| Source: | Journal of Applied Meteorology & Climatology. Jun2026, Vol. 65 Issue 6, p1-19. 19p. |
| Subjects: | Large eddy simulation models, Flow simulations, Weather forecasting, Wind power, Turbulent flow, Atmospheric boundary layer, Atmospheric physics |
| Geographic Terms: | California |
| Abstract: | Weather Research and Forecasting (WRF) model simulations at a "gray zone" horizontal grid spacing of Δ x = 200 m are compared with upscaled large eddy simulations (LES) with the FastEddy ® model and observations over coastal central California to understand and characterize high-resolution turbulent flows for offshore wind resource assessment. A case study of a strong coastal low level jet is examined, resulting from the typical spring and summertime conditions of a broad subtropical ridge in the Northeastern Pacific Ocean. The WRF model simulations use three different planetary boundary layer (PBL) parameterizations: two one-dimensional (1D) parameterizations and a three-dimensional (3D) parameterization, ideally suited for simulating flows at "gray zone" horizontal resolutions. Similarities and differences between the WRF model simulations and upscaled LES are assessed. Overall, the WRF model simulations compare reasonably well with the upscaled LES in simulating the coastal flows, and both the upscaled LES and WRF model simulations compare favorably with observations. The WRF 3D PBL simulation compares most favorably with the upscaled LES, in particular in simulating distributions of vertical velocity over the ocean and land and in capturing energetic small-scale structures, due to its more realistic treatment of horizontal mixing. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Applied Meteorology & Climatology is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | Weather Research and Forecasting (WRF) model simulations at a "gray zone" horizontal grid spacing of Δ x = 200 m are compared with upscaled large eddy simulations (LES) with the FastEddy ® model and observations over coastal central California to understand and characterize high-resolution turbulent flows for offshore wind resource assessment. A case study of a strong coastal low level jet is examined, resulting from the typical spring and summertime conditions of a broad subtropical ridge in the Northeastern Pacific Ocean. The WRF model simulations use three different planetary boundary layer (PBL) parameterizations: two one-dimensional (1D) parameterizations and a three-dimensional (3D) parameterization, ideally suited for simulating flows at "gray zone" horizontal resolutions. Similarities and differences between the WRF model simulations and upscaled LES are assessed. Overall, the WRF model simulations compare reasonably well with the upscaled LES in simulating the coastal flows, and both the upscaled LES and WRF model simulations compare favorably with observations. The WRF 3D PBL simulation compares most favorably with the upscaled LES, in particular in simulating distributions of vertical velocity over the ocean and land and in capturing energetic small-scale structures, due to its more realistic treatment of horizontal mixing. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 15588424 |
| DOI: | 10.1175/JAMC-D-25-0185.1 |
