DOI: 10.1175/JCLI-D-17-0543.1
Scopus记录号: 2-s2.0-85048487731
论文题名: Evaluation of planetary boundary layer simulation in GFDL atmospheric general circulation models
作者: Shin H.H. ; Ming Y. ; Zhao M. ; Golaz J.-C. ; Xiang B. ; Guo H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 13 起始页码: 5071
结束页码: 5087
语种: 英语
英文关键词: Boundary layer
; General circulation models
; Model evaluation/performance
; Parameterization
; Subgrid-scale processes
; Turbulence
Scopus关键词: Atmospheric boundary layer
; Boundary layer flow
; Boundary layers
; Climate models
; Clouds
; Fighter aircraft
; Gas dynamics
; Kinetic energy
; Kinetics
; Mixing
; NASA
; Parameterization
; Turbulence
; Weather forecasting
; Atmospheric general circulation models
; European centre for medium-range weather forecasts
; General circulation model
; Geophysical fluid dynamics laboratories
; K-profile parameterization
; Model evaluation/performance
; Sub-grid scale process
; Turbulence kinetic energy
; Atmospheric thermodynamics
; atmospheric general circulation model
; atmospheric modeling
; boundary layer
; climatology
; diurnal variation
; fluid dynamics
; parameterization
; turbulence
英文摘要: This study describes the performance of two Geophysical Fluid Dynamics Laboratory (GFDL) atmospheric general circulation models (AGCMs) in simulating the climatologies of planetary boundary layer (PBL) parameters, with a particular focus on the diurnal cycles. The two models differ solely in the PBL parameterization: one uses a prescribed K-profile parameterization (KPP) scheme with an entrainment parameterization, and the other employs a turbulence kinetic energy (TKE) scheme. The models are evaluated through comparison with the reanalysis ensemble, which is generated from European Centre for Medium-Range Weather Forecasts (ECMWF) twentieth-century reanalysis (ERA-20C), ERA-Interim, NCEP CFSR, and NASA MERRA, and the following systematic biases are identified. The models exhibit widespread cold biases in the high latitudes, and the biases are smaller when the KPP scheme is used. The diurnal cycle amplitudes are underestimated in most dry regions, and the model with the TKE scheme simulates larger amplitudes. For the near-surface winds, the models underestimate both the daily means and the diurnal amplitudes; the differences between the models are relatively small compared to the biases. The role of the PBL schemes in simulating the PBL parameters is investigated through the analysis of vertical profiles. The Sahara, which is suitable for focusing on the role of vertical mixing in dry PBLs, is selected for a detailed analysis. It reveals that compared to the KPP scheme, the heat transport is weaker with the TKE scheme in both convective and stable PBLs as a result of weaker vertical mixing, resulting in larger diurnal amplitudes. Lack of nonlocal momentum transport from the nocturnal low-level jets to the surfaces appears to explain the underestimation of the near-surface winds in the models. © 2018 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111468
Appears in Collections: 气候减缓与适应
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作者单位: Cooperative Programs for the Advancement of Earth System Science, University Corporation for Atmospheric Research, Boulder, CO, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Lawrence Livermore National Laboratory, Livermore, CA, United States
Recommended Citation:
Shin H.H.,Ming Y.,Zhao M.,et al. Evaluation of planetary boundary layer simulation in GFDL atmospheric general circulation models[J]. Journal of Climate,2018-01-01,31(13)