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A Local Minimum Aliasing Method for Use in Nonlinear Numerical Models
Publisher: American Meteorological Society
Abstract: The local spectral method is a minimum aliasing technique for the discretization and numerical integration of prognostic systems consisting of nonlinear partial differential equations. The technique embodies many features ...
The Measurement of Doppler Wind Fields with Fast Scanning Radars: Signal Processing Techniques
Publisher: American Meteorological Society
Abstract: This paper discusses signal processing techniques being developed for making Doppler wind velocity measurements using airport surveillance radars. Techniques are presented and evaluated for velocity estimation using ...
The Response of the Tropical Atmosphere to Low Frequency Thermal Forcing
Publisher: American Meteorological Society
Abstract: The tropical response to a localized thermal forcing with approximately 45-day period is investigated for several models of increasing complexity consisting of two equivalent shallow water system and two fully stratified ...
Numerical Simulations of Microburst-producing Storms: Some Results from Storms Observed during COHMEX
Publisher: American Meteorological Society
Abstract: In the first part of this paper, the characteristics of microburst-producing storms are examined with a three-dimensional cloud model using soundings from the Cooperative Huntsville Meteorological Experiment (COHMEX). With ...
The Presence of Linear Wavelike Modes in a Zonally Symmetric Model of the Tropical Atmosphere
Publisher: American Meteorological Society
Abstract: The linear, zonally symmetric modes of the basic state of a Hadley cell are examined. We find that the inclusion of the divergent basic state leads to the formation of a new class of slowly oscillating modes, some of which ...
Extension and Application of a Local, Minimum Aliasing Method to Multidimensional Problems in Limited-Area Domains
Publisher: American Meteorological Society
Abstract: The minimal aliasing local spectral (LS) method is a numerical technique that embodies features of both finite-difference (FD) and spectral transform (ST) methods. Anderson first described this method in the context of the ...
A Numerical Study of Traveling Microbursts
Publisher: American Meteorological Society
Abstract: An analysis of traveling microbursts in unidirectionally sheared environments is undertaken using a three-dimensional numerical model with 50-m resolution in a 19 ? 12 ? 4 km domain. For each run, the cooling source is ...
The Latitude-Height Structure of 40–50 Day Variations in Atmospheric Angular Momentum
Publisher: American Meteorological Society
Abstract: Quasi-periodic variations in the relative angular momentum of the atmosphere on time scales of around 40?50 days have been observed by Langley et al. (1981). A description of the two-dimensional (latitude-height) structure ...
A Diagnostic Study of Pacific Basin Circulation Regimes as Determined from Extratropical Cyclone Tracks
Publisher: American Meteorological Society
Abstract: The interannual and intraseasonal track variability of cold season extratropical cyclones in the Pacific basin is examined using an 8 year cyclone track dataset. An EOF technique incorporating VARIMAX rotation in time is ...