The Effect of Aerosol Radiative Heating on Turbulence Statistics and Spectra in the Atmospheric Convective Boundary Layer: A Large-Eddy Simulation Study
Abstract
:1. Introduction
2. Model and Methodology
2.1. Model Description
2.2. Numerical Experiments
3. Results and Discussions
3.1. Flow Visualization
3.2. Spectral Analysis
3.3. Profiles of Turbulence Statistics
3.4. Scaling Parameters for Normalization of Statistics
4. Summary and Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Characteristic | Setting |
---|---|
Domain size | 5 km × 5 km × 1.92 km |
Grid spacing | 50 m × 50 m × 20 m |
Temperature gradient above CBL | dθ/dz = 3 K km−1, 6 K km−1, and 9 K km−1 |
Time step | Determined from a numerical stability constraint, varies from 1.6 s to 2.0 s |
Lateral boundary layer conditions | Periodic |
Upper boundary layer conditions | A radiation boundary layer condition [52] |
Lower boundary layer conditions | No slip for velocity and Monin-Obukhov similarity |
Aerosol optical depth (AOD) | CTL: 0, A03: 0.3, A06: 0.6, A09: 0.9, A12: 1.2, A15: 1.5 |
Single scattering albedo (SSA) | 0.9 |
Asymmetry factor (gf) | 0.6 |
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Liu, C.; Huang, J.; Fedorovich, E.; Hu, X.-M.; Wang, Y.; Lee, X. The Effect of Aerosol Radiative Heating on Turbulence Statistics and Spectra in the Atmospheric Convective Boundary Layer: A Large-Eddy Simulation Study. Atmosphere 2018, 9, 347. https://doi.org/10.3390/atmos9090347
Liu C, Huang J, Fedorovich E, Hu X-M, Wang Y, Lee X. The Effect of Aerosol Radiative Heating on Turbulence Statistics and Spectra in the Atmospheric Convective Boundary Layer: A Large-Eddy Simulation Study. Atmosphere. 2018; 9(9):347. https://doi.org/10.3390/atmos9090347
Chicago/Turabian StyleLiu, Cheng, Jianping Huang, Evgeni Fedorovich, Xiao-Ming Hu, Yongwei Wang, and Xuhui Lee. 2018. "The Effect of Aerosol Radiative Heating on Turbulence Statistics and Spectra in the Atmospheric Convective Boundary Layer: A Large-Eddy Simulation Study" Atmosphere 9, no. 9: 347. https://doi.org/10.3390/atmos9090347