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Journal of the Atmospheric Sciences
EISSN: 1520-0469
ISSN: 0022-4928
Priority: 12
Description: Journal of the Atmospheric Sciences (JAS) publishes basic research related to the physics, dynamics, and chemistry of the atmosphere of Earth and other planets, with emphasis on the quantitative and deductive aspects of the subject More ...
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RISOn the Source of Midlatitude Low-Frequency Variability. Part I: A Statistical Approach to Persistence
Publisher: American Meteorological Society
Abstract: The forcing of low-frequency variability by synoptic transient traveling perturbations is investigated within a quasi-geostrophic channel forced by a localized baroclinic jet. Spontaneously generated baroclinic perturbations ...
Temperature and Supersaturation Dependent Nucleation Rates of Water by Molecular Cluster Model Calculations
Publisher: American Meteorological Society
Abstract: The homogeneous nucleation process for water has been the subject of great interest, despite the fact that water droplet formation in the atmosphere occurs by heterogeneous nucleation. This is because the homogeneous ...
Baroclinic Instability at Short Wavelengths in Vertically Discrete Quasi-Geostrophic and Ageostrophic Models
Publisher: American Meteorological Society
Abstract: Short wavelength linear baroclinic instability is examined numerically in two quasi-geostrophic models and one ageostrophic model. The growth rate spectra for the ageostrophic model differ little from those of the ...
Evolution of Peaks in the Spectral Distribution of Raindrops from Warm Isolated Maritime Clouds
Publisher: American Meteorological Society
Abstract: Two and one-half years of observations and measurements of isolated maritime clouds in Guadeloupe (Lesser Antilles) are presented. Raindrop spectra are measured on the ground with a Joss device and an Epson PX8 Analyser. ...
A Delayed Action Oscillator for ENSO
Publisher: American Meteorological Society
Abstract: A simple nonlinear model is proposed for the El Niño/Southern Oscillation (ENSO) phenomenon. Its key feature is the inclusion of oceanic wave transit effects through a negative, delayed feedback. A linear stability analysis ...
Equilibrium Raindrop Size Distributions in Tropical Rain
Publisher: American Meteorological Society
Abstract: Observations of raindrop size distributions in Brazil were analyzed. For long lasting records and during periods when there was no evidence of rain falling through updraft, the observations indicate that equilibrium between ...
The Statistical Properties of a Zonal Jet in a Baroclinic Atmosphere: A Semilinear Approach. Part I: Quasi-geostrophic, Two-Layer Model Atmosphere
Publisher: American Meteorological Society
Abstract: A semilinear (the wave-dynamics are linear with the time-evolution operator determined by the time-varying zonal flow while the zonal flow is fully nonlinear in the eddy fluxes) model of a baroclinic zonal jet is integrated, ...
Numerical Simulations of an Isolated Microburst. Part I: Dynamics and Structure
Publisher: American Meteorological Society
Abstract: Isolated and stationary microbursts are simulated using a time-dependent, high-resolution, axisymmetric numerical model. A microburst downdraft is initiated by specifying a distribution of precipitation at the top boundary ...
Analysis and Numerical Simulations of the Saharan Air Layer and Its Effect on Easterly Wave Disturbances
Publisher: American Meteorological Society
Abstract: A Conceptual model of the Saharan Air Layer (SAL) and easterly wave disturbance is presented in light of diagnostic analyses of dust outbreaks. Numerical simulations of the SAL were carried out to 5 days for two case studies ...
Parameterization of Reflectivity for Broken Cloud Fields
Publisher: American Meteorological Society
Abstract: To parameterize the reflected fluxes from broken cloud fields, Monte Carlo calculations are performed for several cumulus cloud fields. The results with the effects of cloud-cloud interaction and enhanced illuminated area ...