Journal of the Atmospheric Sciences: Recent submissions
Now showing items 4001-4020 of 13215
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The Response to Stratospheric Forcing and Its Dependence on the State of the Troposphere
(American Meteorological Society, 2009)In simple GCMs, the time scale associated with the persistence of one particular phase of the model?s leading mode of variability can often be unrealistically large. In a particularly extreme example, the time scale in the ... -
Effect of Altitude Concentration Gradient of Soluble Gaseous Pollutants on Their Scavenging by Falling Rain Droplets
(American Meteorological Society, 2009)This paper analyzes absorption of soluble atmospheric trace gases by falling rain droplets with internal circulation, which is caused by interfacial shear stresses. It is assumed that the concentration of soluble trace ... -
The Tropical Response to Extratropical Thermal Forcing in an Idealized GCM: The Importance of Radiative Feedbacks and Convective Parameterization
(American Meteorological Society, 2009)The response of tropical precipitation to extratropical thermal forcing is reexamined using an idealized moist atmospheric GCM that has no water vapor or cloud feedbacks, simplifying the analysis while retaining the ... -
Systematic Metastable Atmospheric Regime Identification in an AGCM
(American Meteorological Society, 2009)In this study the authors apply a recently developed clustering method for the systematic identification of metastable atmospheric regimes in high-dimensional datasets generated by atmospheric models. The novelty of this ... -
Radiosity Approach for the Shortwave Surface Radiation Balance in Complex Terrain
(American Meteorological Society, 2009)The influence of topography on the radiation balance in complex terrain has so far been investigated either with very simple or very sophisticated approaches that are limited, respectively, by an uncontrolled spatial ... -
Equatorially Bounded Zonally Propagating Linear Waves on a Generalized β Plane
(American Meteorological Society, 2009)Meridionally confined zonally propagating wave solutions to the linear hydrostatic Boussinesq equations on a generalized equatorial ? plane that includes the ?nontraditional? Coriolis force terms associated with the poleward ... -
Reexamining the Vertical Structure of Tangential Winds in Tropical Cyclones: Observations and Theory
(American Meteorological Society, 2009)A few commonly held beliefs regarding the vertical structure of tropical cyclones drawn from prior studies, both observational and theoretical, are examined in this study. One of these beliefs is that the outward slope of ... -
Comments on “A Common Misunderstanding about the Voigt Line Profile”
(American Meteorological Society, 2009)In a recent paper, it was argued that some of the illustrations in popular textbooks comparing the Lorentz and Gaussian profiles with the ?corresponding? Voigt profile are incorrect. These ?misunderstandings? are shown to ... -
Numerical Simulations of Conditionally Unstable Flows over a Mountain Ridge
(American Meteorological Society, 2009)Numerical simulations of conditionally unstable flows impinging on a mesoscale mountain ridge have been performed with an explicitly resolving cloud model to investigate the statistically stationary features of the solution ... -
Application of a Subfilter-Scale Flux Model over the Ocean Using OHATS Field Data
(American Meteorological Society, 2009)Simple rate equation models for subfilter-scale scalar and momentum fluxes have previously been developed for application in the so-called ?terra incognita? of atmospheric simulations, where the model resolution is comparable ... -
Resonant Wave Interactions in the Presence of a Diurnally Varying Heat Source
(American Meteorological Society, 2009)Resonant interactions among equatorial waves in the presence of a diurnally varying heat source are studied in the context of the diabatic version of the equatorial ?-plane primitive equations for a motionless, hydrostatic, ... -
Equatorial Zonal Jet Formation through the Barotropic Instability of Low-Frequency Mixed Rossby–Gravity Waves, Equilibration by Inertial Instability, and Transition to Superrotation
(American Meteorological Society, 2009)Depth-dependent barotropic instability of short mixed Rossby?gravity (MRG) waves is proposed as a mechanism for the formation of equatorial zonal jets. High-resolution primitive equation simulations show that a single MRG ... -
Boundary Layer Dynamics in a Simple Model for Convectively Coupled Gravity Waves
(American Meteorological Society, 2009)A simplified model of intermediate complexity for convectively coupled gravity waves that incorporates the bulk dynamics of the atmospheric boundary layer is developed and analyzed. The model comprises equations for velocity, ... -
A Comprehensive Habit Diagram for Atmospheric Ice Crystals: Confirmation from the Laboratory, AIRS II, and Other Field Studies
(American Meteorological Society, 2009)Recent laboratory experiments and in situ observations have produced results in broad agreement with respect to ice crystal habits in the atmosphere. These studies reveal that the ice crystal habit at ?20°C is platelike, ... -
The Path Density of Interhemispheric Surface-to-Surface Transport. Part II: Transport through the Troposphere and Stratosphere Diagnosed from NCEP Data
(American Meteorological Society, 2009)Interhemispheric transport from the earth?s surface north of 32.4°N (region ΩN) to the surface south of 32.4°S (region ΩS) is quantified using the path-density diagnostic developed in Part I of this study. The path density ... -
Energy and Enstrophy Spectra of Geostrophic Turbulent Flows Derived from a Maximum Entropy Principle
(American Meteorological Society, 2009)The principle of maximum entropy is used to obtain energy and enstrophy spectra as well as average relative vorticity fields in the context of geostrophic turbulence on a rotating sphere. In the unforced-undamped (inviscid) ... -
The Path Density of Interhemispheric Surface-to-Surface Transport. Part I: Development of the Diagnostic and Illustration with an Analytic Model
(American Meteorological Society, 2009)A new path-density diagnostic for atmospheric surface-to-surface transport is formulated. The path density ? gives the joint probability that air whose last surface contact occurred on patch Ωi at time ti will make its ... -
Effects of Pressure on Collision, Coalescence, and Breakup of Raindrops. Part II: Parameterization and Spectra Evolution at 50 and 100 kPa
(American Meteorological Society, 2009)Fragment size distributions, experimentally obtained for six drop pairs colliding at 50 kPa, are parameterized similarly to the 100-kPa drop pair experiments by Low and List. This information is then introduced into a box ... -
Wave Driving in the Tropical Lower Stratosphere as Simulated by WACCM. Part I: Annual Cycle
(American Meteorological Society, 2009)This study explores the climatological annual cycle of temperature, circulation, and wave driving distributions in the tropical lower stratosphere as produced in a 50-yr simulation of the Whole Atmosphere Community Climate ... -
Effects of Pressure on Collision, Coalescence, and Breakup of Raindrops. Part I: Experiments at 50 kPa
(American Meteorological Society, 2009)Previous breakup experiments have been carried out at laboratory pressures (?100 kPa). However, raindrop interactions mainly take place higher up in the atmosphere, even in the supercooled part of a cloud where drops can ...