Magazine article from our research archive:
|
|
Small-scale and mesoscale variability in cloudy boundary layers: Joint probability density functions
- Article from:
-
Journal of the Atmospheric Sciences
- Article date:
-
December 15, 2002
- Author:
-
;
;
|
Copyright informationCopyright American Meteorological Society Dec 15, 2002. Provided by ProQuest LLC. (Hide copyright information)
|
ABSTRACT
The joint probability density function (PDF) of vertical velocity and conserved scalars is important for at least two reasons. First, the shape of the joint PDF determines the buoyancy flux in partly cloudy layers. Second, the PDF provides a wealth of information about subgrid variability and hence can serve as the foundation of a boundary layer cloud and turbulence parameterization.
This paper analyzes PDFs of stratocumulus, cumulus, and clear boundary layers obtained from both aircraft observations and large eddy simulations. The data are used to fit five families of PDFs: a double delta function, a single Gaussian, and three PDF families based on the sum of two Gaussians.
...
Related newspaper, magazine, and journal articles:
|
Parameterization of the dry convective boundary layer based on a mass flux...
Journal of the Atmospheric Sciences;
March 15, 2002 ;
700+ words
......the planetary boundary layer. J. Atmos. Sci., 54, 1850-18...the convective boundary layer evaluated from...simulation. J. Atmos. Sci., 46, 2178-22...the atmospheric boundary layer over the equatorial...Pacific Ocean. J. Atmos. Sci., 39, 1803-18...
|
|
Simple inclusion os z-less turbulence within and above the modeled...
Monthly Weather Review;
August 1, 2001 ;
700+ words
......convective atmospheric boundary layer. J. Atmos. Sci., 48, 1690-1698. and...of the stable, nocturnal boundary layer. J. Atmos. Sci., 41, 2202-2216. and...the stable atmospheric boundary layer. J. Atmos. Sci., 48, 856-868. Sun...
|
|
Linking boundary layer circulations and surface processes during FIFE 89....
Journal of the Atmospheric Sciences;
April 1, 1998 ;
700+ words
......between biophysical feedback processes, boundary layer structure, and circulations in the boundary layer. The objective is to understand how...convection associated with an undisturbed boundary layer situation and rainfall occurring during...
|
|
The flatland boundary layer experiments
Bulletin of the American Meteorological Society;
March 1, 1998 ;
700+ words
......article describes the 1995 and 1996 Flatland boundary layer experiments, known as Flatland95 and Flatland96...theme of characterization of the convective boundary layer, especially the boundary layer top and entrainment zone. In this article...
|
|
Boundary layer development over a tropical island during the maritime...
Journal of the Atmospheric Sciences;
August 1, 2001 ;
700+ words
......December 1995) have been used to analyze boundary layer development and circulations over two...every day of the field campaign. The boundary layer depth, temperature, and circulation...measurements. On average, the island boundary layer depth reaches 1.5 km by early to ...
|
|
Formulation of turbulent fluxes in the stable boundary layer
Journal of the Atmospheric Sciences;
October 15, 2003 ;
700+ words
......generalized version includes a dependence on boundary layer depth, which approaches the usual boundary layer height dependence for neutral conditions...many of the observational cases, a boundary layer did not exist in the usual sense, in...
|
|
Convective boundary layer depth: Improved measurement by Doppler wind...
Journal of Atmospheric and Oceanic Technology;
November 1, 2002 ;
642 words
......Avery, 1994a: Boundary-- layer depth and entrainment...characterization with a boundary-layer profiler. Bound...techniques. J. Atmos. Oceanic Technol...determining convective boundary layer mixing depth from...Doppler spectra. J. Atmos. Oceanic Technol...solutions. J. ...
|
|
Mesoscale fluctuations in scalars generated by boundary layer convection
Journal of the Atmospheric Sciences;
March 1, 1999 ;
700+ words
......simulations of the penetrating dry convective boundary layer (microscale convection). The simulated...horizontal size being roughly 16 times the boundary layer depth. It turns out that both the turbulent...originates from a scale of the order of the boundary layer height. ...
|
|
Analysis of mesoscale linear features observed in the Artic atmospheric...
Monthly Weather Review;
September 1, 1996 ;
700+ words
......shallow (z^sub i^ == 150 m) atmospheric boundary layer is documented. These were observed...within and above the arctic atmospheric boundary layer. These aircraft data also exhibit smaller-sca...circulations with scales of 3-8 times the boundary layer depth. Based on analysis of our ...
|
|
boundary layer
A Dictionary of Geography;
54 words
...boundary layer In meteorology, any layer of the atmosphere...boundary: the earth's surface. The laminar boundary layer is the few millimetres above the surface; the turbulent boundary layer, or surface boundary layer, is an ill‐...
|
|
Convective boundary layer height measurement with wind profilers and...
Journal of Atmospheric and Oceanic Technology;
December 1, 1998 ;
700+ words
...ABSTRACT The depth of the atmospheric boundary layer is of interest in several different...compare several different measurements of boundary layer depth. First, the authors use the standard...humidity gradients to estimate the boundary layer depth. A method for obtaining meaningful...
|
|
An observational and numerical study of a sheared, convective boundary...
Journal of the Atmospheric Sciences;
September 1, 1999 ;
700+ words
......of a convective, sheared planetary boundary layer during an afternoon over the High Plains...layer and lowest third of the observed boundary layer were similar to minimally sheared convective...differences in the upper two-thirds of the boundary layer. An overrunning residual ...
|
|
Application of a perturbation recycling method in the large-eddy...
Journal of the Atmospheric Sciences;
August 1, 2002 ;
700+ words
......addition to the domain where the internal boundary layer develops, the method requires a section...surface that is of the order of 10 boundary layer thicknesses and thus similar in size to that needed for the LES of the upwind boundary layer. In addition to periodic lateral, closed...
|
|
Entrainment, Rayleigh friction, boundary layer winds over the tropical...
Journal of Climate;
January 1, 2002 ;
700+ words
......mixing of momentum into the boundary layer (entrainment)-is very successful...entrainment rate and the boundary layer depth) are assumed to have...Such a procedure leads to boundary layer depths between 300 and 400...more general model of the boundary layer winds (the ...
|
See all results.
Or, try our
Advanced Search.
|