Journal ArticleDOI
Observations of complex terrain flows using acoustic sounders: Echo interpretation
Reads0
Chats0
TLDR
In this paper, the authors examined methods for the interpretation of sodar facsimile records obtained in the study of complex terrain flows, including simple drainage jets, complex basin flows, convection with a capping inversion and dynamical instabilities.Abstract:
We examine methods for the interpretation of sodar facsimile records obtained in the study of complex terrain flows. Acoustic scattering theory is presented first and then interpreted using a simpolified second-order turbulence closure scheme. The use of this theory suggests the strong sensitivity of acoustic scatter to changes in the wind shear. With this introduction, detailed sodar facsimile records, temperature and wind profiles, and model calculations follow. Characteristic scattering patterns are described for simple drainage jets, complex basin flows, convection with a capping inversion, stratus, and dynamical instabilities. Examples are also shown of bistatic facsimile records detailing the strong temporal and spatial variability in small-scale turbulence.read more
Citations
More filters
Journal ArticleDOI
Shear-Flow Instability in the Stable Nocturnal Boundary Layer as Observed by Doppler Lidar during CASES-99
Rob K. Newsom,Robert M. Banta +1 more
TL;DR: In this paper, the authors investigated a shear-flow instability observed in the stably stratified nighttime boundary layer on 6 October 1999 during the Cooperative Atmosphere-Surface Exchange Study (CASES-99) in south-central Kansas.
Journal ArticleDOI
OH photochemistry and methane sulfonic acid formation in the coastal Antarctic boundary layer
Anne Jefferson,David J. Tanner,Fred Eisele,Douglas D. Davis,G. Chen,James H. Crawford,J. W. Huey,A. L. Torres,Harald Berresheim +8 more
TL;DR: For example, this paper found that the dominant source of DMS oxidation is from the reaction of O(1D) with H20, where O( 1D) is the product of 03 photolysis.
Journal Article
OH photochemistry and methane sulfonic acid formation in the coastal Antarctic boundary layer
TL;DR: For example, this paper found that the dominant source of DMS oxidation is from the reaction of O(1D) with H20, where O( 1D) is the product of 03 photolysis.
Journal ArticleDOI
A study of boundary layer behavior associated with high NO concentrations at the South Pole using a minisodar, tethered balloon, and sonic anemometer
TL;DR: In this article, the use of an acoustic sounder, or sodar, during the 2003 Antarctic Tropospheric Chemistry Investigation (ANTCI), to document the behavior of very shallow (
Journal ArticleDOI
Propagation of electromagnetic waves through a turbulent atmosphere
TL;DR: A review of the major advances achieved in the studies of EM wave propagation in turbulent media can be found in this paper, where the theoretical results of this treatise include: the path integration technique, the predominant correlation method, the two-scale method, hybrid approach to scattering from small inhomogeneities in the presence of large ones, the theory of coherent channels in backscattering, and the concept of partially determinate processes and fields.
References
More filters
Journal ArticleDOI
The Turbulent Structure of the Stable, Nocturnal Boundary Layer
TL;DR: In this paper, a large number of turbulence observations were made under stable conditions along a meteorological mast at Cabauw, The Netherlands, and they were used to present and organize these data and turn to the parameterized equations for the turbulent variances and covariances.
Waves in the atmosphere
TL;DR: In this paper, the authors propose a method to solve the problem of how to find the shortest path between two points of interest in a set of images. Index Reference Record created on 2004-09-07, modified on 2016-08-08
Journal ArticleDOI
A Model Study of the Stably Stratified Planetary Boundary Layer
R. A. Brost,J. C. Wyngaard +1 more
TL;DR: In this paper, a second-order turbulence model is used to study the stable boundary layer (SBL) over a horizontal surface, a constant surface cooling rate drives the SBL to a steady state within a few hours.
Journal ArticleDOI
A Model of Katabatic Winds
P. C. Manins,B. L. Sawford +1 more
TL;DR: In this article, a hydraulic approach is employed in which the detailed vertical structure of the flow is replaced by a quiescent stably stratified environment and an equivalent flowing layer which is subject to sustained layer cooling, surface stress and interfacial entrainment.
Journal ArticleDOI
Modeling the planetary boundary layer — Extension to the stable case
TL;DR: In this article, a higher-order closure model was developed and used to investigate the structure of the stably-stratified planetary boundary layer (PBL) and calculated surface-layer profiles of wind shear, temperature gradient, and dissipation rate agree well with the 1968 Kansas data.