A study of wind speed modification and internal boundary-layer heights in a coastal region

1988 ◽  
Vol 42 (4) ◽  
pp. 313-335 ◽  
Author(s):  
Hans Bergström ◽  
Per-Erik Johansson ◽  
Ann-Sofi Smedman
Keyword(s):  
Boundary Layer ◽  
Wind Speed ◽  
Coastal Region ◽  
Internal Boundary Layer ◽  
Internal Boundary

scholarly journals Study of the Thermal Internal Boundary Layer in Sea Breeze Conditions Using Different Parameterizations: Application of the WRF Model in the Greater Vitória Region

2016 ◽  
Vol 31 (4 suppl 1) ◽  
pp. 593-609 ◽  
Author(s):  
Nadir Salvador ◽  
◽  
Ayres G. Loriato ◽  
Alexandre Santiago ◽  
Taciana T.A. Albuquerque ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Land Surface ◽  
Wrf Model ◽  
Coastal Region ◽  
Sea Breeze ◽  
Internal Boundary Layer ◽  
Internal Boundary ◽  
Surface Model ◽  
Thermal Internal Boundary Layer ◽  
Local Closure

Abstract In the present study, the physical parameterizations of the Weather Research and Forecasting (WRF) model are verified for making accurate inferences about the dynamics of the Thermal Internal Boundary Layer (TIBL) generated by sea breeze in an urban center with an island in a bay along a coastal region with rugged topography. The simulations were performed using parameterizations from Yonsei University (YSU), Mellor-Yamada-Janjic (MYJ) and Asymmetric Convective Model version 2 (ACM2) for the atmospheric boundary layer (ABL) and Noah and Rapid Update Cycle (RUC) for the Land Surface Model (LSM). The data inferred by the WRF model were compared with those obtained by a Surface Meteorological Station (SMS) and by measurements generated using Light Detection and Ranging (LIDAR), Sonic Detection and Ranging (SODAR) and radiosonde. The simulations showed that although the object of this research was a region with high geographical complexity, the YSU parameterization set (non-local closure) for the ABL and the Noah parameterization for the LSM presented satisfactory results in determining ABL height generated by the sea breeze on the day in question.

Diabatic wind speed profiles in coastal regions: Comparison of an internal boundary layer (IBL) model with observations

1990 ◽  
Vol 51 (1-2) ◽  
pp. 49-75 ◽  
Author(s):  
A. C. M. Beljaars ◽  
A. A. M. Holtslag ◽  
W. C. Turkenburg
Keyword(s):  
Boundary Layer ◽  
Wind Speed ◽  
Internal Boundary Layer ◽  
Internal Boundary ◽  
Coastal Regions

INTEGRAL TRANSFORM SOLUTION FOR THE INTERNAL BOUNDARY LAYER OF NON-NEWTONIAN FLUIDS

1999 ◽  
Vol 1 (2) ◽  
pp. 12 ◽  
Author(s):  
R. N. O. Magno ◽  
Joao N. N. Quaresma ◽  
E. N. Macedo
Keyword(s):  
Boundary Layer ◽  
Integral Transform ◽  
Internal Boundary Layer ◽  
Newtonian Fluids ◽  
Internal Boundary

Fine structure of the internal boundary layer in the near-shore zone of the sea

1976 ◽  
Vol 10 (4) ◽  
pp. 503-505 ◽  
Author(s):  
P. Hupfer ◽  
Th. Foken ◽  
U. Bachstein
Keyword(s):  
Boundary Layer ◽  
Fine Structure ◽  
Internal Boundary Layer ◽  
Internal Boundary ◽  
Shore Zone ◽  
Near Shore

scholarly journals On the internal boundary layer related wind stress curl and its role in generating shallow lake circulations

2014 ◽  
Vol 62 (1) ◽  
pp. 16-23 ◽  
Author(s):  
János Józsa
Keyword(s):  
Boundary Layer ◽  
Wind Stress ◽  
Shallow Lake ◽  
Large Scale ◽  
Internal Boundary Layer ◽  
Internal Boundary ◽  
Development Theory ◽  
Wind Stress Curl ◽  
Flow Models ◽  
Boundary Layer Development

Abstract The paper demonstrates that the wind stress curl as an external vorticity source plays an important role in shaping large scale shallow lake circulations. The analysis of purpose-oriented simultaneous wind and current measurements data from the Hungarian part of Lake Neusiedl reasonably fits well the internal boundary layer development theory over the lake surface. A 2-D vorticity formulation of wind-induced flows is used to demonstrate mathematically the IBL-related large scale circulation generation mechanism well reflected in the measured data. Further validation of the findings is carried out by means of simple 2-D numerical flow modelling, in which details on the flow pattern besides the measurement sites could be also revealed. Wind-induced lake circulations linked to IBL development shows a novelty to be implemented in up-to-date numerical flow models.

scholarly journals Turbulence Adjustment and Scaling in an Offshore Convective Internal Boundary Layer: A CASPER Case Study

2020 ◽  
Vol 77 (5) ◽  
pp. 1661-1681
Author(s):  
Qingfang Jiang ◽  
Qing Wang ◽  
Shouping Wang ◽  
Saša Gaberšek
Keyword(s):  
Boundary Layer ◽  
Surface Layer ◽  
Kinetic Energy ◽  
Wind Shear ◽  
Vertical Wind Shear ◽  
Internal Boundary Layer ◽  
Turbulence Kinetic Energy ◽  
Internal Boundary ◽  
Field Observations ◽  
The Mean

Abstract The characteristics of a convective internal boundary layer (CIBL) documented offshore during the East Coast phase of the Coupled Air–Sea Processes and Electromagnetic Ducting Research (CASPER-EAST) field campaign has been examined using field observations, a coupled mesoscale model (i.e., Navy’s COAMPS) simulation, and a couple of surface-layer-resolving large-eddy simulations (LESs). The Lagrangian modeling approach has been adopted with the LES domain being advected from a cool and rough land surface to a warmer and smoother sea surface by the mean offshore winds in the CIBL. The surface fluxes from the LES control run are in reasonable agreement with field observations, and the general CIBL characteristics are consistent with previous studies. According to the LESs, in the nearshore adjustment zone (i.e., fetch < 8 km), the low-level winds and surface friction velocity increase rapidly, and the mean wind profile and vertical velocity skewness in the surface layer deviate substantially from the Monin–Obukhov similarity theory (MOST) scaling. Farther offshore, the nondimensional vertical wind shear and scalar gradients and higher-order moments are consistent with the MOST scaling. An elevated turbulent layer is present immediately below the CIBL top, associated with the vertical wind shear across the CIBL top inversion. Episodic shear instability events occur with a time scale between 10 and 30 min, leading to the formation of elevated maxima in turbulence kinetic energy and momentum fluxes. During these events, the turbulence kinetic energy production exceeds the dissipation, suggesting that the CIBL remains in nonequilibrium.

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