Exploració per tema "Boundary layer (Meteorology)"
Ara es mostren els items 1-20 de 54
-
A conceptual model of a shallow circulation induced by prescribed low-level radiative cooling
(2017-10-01)
Article
Accés obertA conceptual bulk model for a dry, convective boundary layer with prescribed horizontally homogeneous and heterogeneous low-level radiative cooling rates is developed. For horizontally homogeneous radiative cooling, the ... -
A model of the wind direction signature in the Stokes emission vector from the ocean surface at microwave frequencies
(JOHN WILEY & SONS INC, 2001-06-30)
Article
Accés obertThis paper presents a model of the Stokes emission vector from the ocean surface. The ocean surface is described as an ensemble of facets with Cox and Munk's (1954) Gram-Charlier slope distribution. The study discusses the ... -
A two-dimensional doppler-radiometer for earth observation
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-07-31)
Article
Accés obertCompared to synthetic aperture radars (SARs), the angular resolution of microwave radiometers is quite poor. Traditionally, it has been limited by the physical size of the antenna. However, the angular resolution can be ... -
An intercomparison of mesoscale simulations during the Boundary Layer Late Afternoon and Sunset Turbulence (BLLAST) experimental field campaign
(2014)
Comunicació de congrés
Accés obertThe Convective (diurnal, CBL) and Stably stratified (nocturnal, SBL) Boundary Layers over land have been extensively observed and relatively successfully modeled. But the early morning transition, when the CBL emerges from ... -
Analysis of correlation and total power radiometer front-ends using noise waves
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
Article
Accés obertA complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ... -
Atmospheric boundary layer height disambiguation using synergistic remote sensing observations: case examples from VORTEX-SE
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
Text en actes de congrés
Accés obertSynergistic remote sensing of the atmosphere, combined with adaptive techniques, offers unprecedented opportunities to characterise the evolution of key atmospheric features such as the Atmospheric Boundary Layer (ABL). ... -
Atmospheric-turbulence-induced power-fade statistics for a multiaperture optical receiver
(OPTICAL SOC AMER, 1997-01-31)
Article
Accés obertTo estimate the probability distributions of power fades, we consider two basic types of disturbance in electromagnetic wave propagation through atmospheric turbulence: wave-front intensity fluctuations and wave-front ... -
Cloud formation in the atmospheric boundary layer
(Universitat Politècnica de Catalunya, 2020-09-09)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorThe representation of cloud formation in weather and climate models remains a challenge, since it involves very complex phenomena such as turbulent mixing, which is key for the ability of clouds to form and dissipate. Thus, ... -
Convective boundary-layer height estimation from combined radar and Doppler lidar observations in VORTEX-SE
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
Text en actes de congrés
Accés obertThe Verification of the Origins of Rotation in Tornadoes Experiment Southeast (VORTEX-SE) provides a wealth of long-duration, high-resolution, vertically pointing observations from active and passive ground-based remote ... -
Denormalization of visibilities for in-orbit calibration of interferometric radiometers
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-10-31)
Article
Accés obertThis paper reviews the relative calibration of an interferometric radiometer taking into account the experimental results of the first batch of receivers developed in the frame of the European Space Agency's Soil Moisture ... -
Direct numerical simulation of free convection over a heated plate
(2012-12-10)
Article
Accés obertDirect numerical simulations of free convection over a smooth, heated plate are used to investigate unbounded, unsteady turbulent convection. Four different boundary conditions are considered: free-slip or no-slip walls, ... -
Direct Numerical Simulations of a smoke cloud-top mixing layer as a model for stratocumuli
(2013-08-05)
Article
Accés obertA radiatively driven cloud-top mixing layer is investigated using direct numerical simulations. This configuration mimics the mixing process across the inversion that bounds the stratocumulus-topped boundary layer. The ... -
Evaluation of the diurnal cycle in the atmospheric boundary layer over land as represented by a variety of single-column models: the second GABLS experiment
(2011-08)
Article
Accés restringit per política de l'editorial -
Evolution of the Thorpe and Ozmidov scales at the lower atmospheric and planetary boundary layer
(Universidad Complutense de Madrid (UCM), 2010)
Comunicació de congrés
Accés obertTurbulence affects the dynamics of atmospheric processes by enhancing the transport of mass, heat, humidity and pollutants. The global objective of our work is to analyze some turbulent descriptors which reflect the mixing ... -
Evolution of the turbulence during the afternoon transition of the convective boundary layer: a spectral analysis
(American Meteorological Society, 2014)
Text en actes de congrés
Accés obertThe transition from a well-mixed convective boundary layer to a residual layer overlying a stabilized nocturnal layer raises several issues, which remain difficult to address from both modeling and observational perspectives. ... -
Extension of Kirchhoff method under stationary phase approximation to determination of polarimetric thermal emission from the sea
(IEE-INST ELEC ENG, 1998-07-31)
Article
Accés obertWind direction over the sea can be determined from radiometric measurements of the third Stokes parameter (TU). The Kirchhoff method is extended under the stationary phase approximation to compute the dependence of TU on ... -
Formulation of the Dutch Atmospheric Large-Eddy Simulation (DALES) and overview of its applications
(2010-09-30)
Article
Accés obertThe current version of the Dutch Atmospheric Large-Eddy Simulation (DALES) is presented. DALES is a large-eddy simulation code designed for studies of the physics of the atmospheric boundary layer, including convective and ... -
Global intermittency and collapsing turbulence in a stratified planetary boundary layer
(2014-07-19)
Article
Accés obert -
Growth and decay of a convective boundary layer over a surface with a constant temperature
(2016-05-05)
Article
Accés obertThe growth and decay of a convective boundary layer (CBL) over a surface with a constant surface temperature that develops into a linear stratification is studied, and a mathematical model for this system is derived. The ... -
Inter-comparison of lidar methods for obtaining planetary boundary-layer height from a July 2012 monitoring campaign over the Iberian Peninsula in the framework of EARLINET
(2013)
Comunicació de congrés
Accés obertThe depth of the planetary boundary-layer (PBL) is defined as the height of the inversion level separating the free troposphere (FT) from the boundary-layer (Stull, 1988). Reliable representation of PBL height is important ...