Journal of the Atmospheric Sciences: Recent submissions
Now showing items 4081-4100 of 13215
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Aerosol Radiative Forcing and Forcing Efficiency in the UVB for Regions Affected by Saharan and Asian Mineral Dust
(American Meteorological Society, 2009)The influence of mineral dust on ultraviolet energy transfer is studied for two different mineralogical origins. The aerosol radiative forcing ?F and the forcing efficiency at the surface ?Feff in the range 290?325 nm were ... -
Consistent Scale Interaction of Gravity Waves in the Doppler Spread Parameterization
(American Meteorological Society, 2009)The standard Doppler spread parameterization of gravity waves, which was proposed by C.-O. Hines and has been applied in a number of middle atmosphere general circulation models, is extended by the inclusion of all effects ... -
The Relationship between Statistically Linear and Nonlinear Feedbacks and Zonal-Mean Flow Variability in an Idealized Climate Model
(American Meteorological Society, 2009)Simulations using an idealized, atmospheric general circulation model (GCM) subjected to various thermal forcings are analyzed via a combination of probability density function (PDF) estimation and spectral analysis ... -
A Simple Dynamical Model with Features of Convective Momentum Transport
(American Meteorological Society, 2009)Convective momentum transport (CMT) plays a central role in interactions across multiple space and time scales. However, because of the multiscale nature of CMT, quantifying and parameterizing its effects is often a ... -
How Generic Are Dipolar Jet EOFs?
(American Meteorological Society, 2009)Dipolar structures arise as empirical orthogonal functions (EOFs) of extratropical tropospheric zonal-mean zonal wind in observations, in idealized dynamical models, and in complex general circulation models. This study ... -
A New Algorithm for Low-Frequency Climate Response
(American Meteorological Society, 2009)The low-frequency response to changes in external forcing for the climate system is a fundamental issue. In two recent papers the authors developed a new blended response algorithm for predicting the response of a nonlinear ... -
Moisture Vertical Structure, Column Water Vapor, and Tropical Deep Convection
(American Meteorological Society, 2009)The vertical structure of the relationship between water vapor and precipitation is analyzed in 5 yr of radiosonde and precipitation gauge data from the Nauru Atmospheric Radiation Measurement (ARM) site. The first vertical ... -
A Critical Examination of the Observed First Aerosol Indirect Effect
(American Meteorological Society, 2009)The relative change in cloud droplet number concentration with respect to the relative change in aerosol number concentration, α, is an indicator of the strength of the aerosol indirect effect and is commonly used in models ... -
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(American Meteorological Society, 2008) -
Diagnostic Analysis of Tidal Winds and the Eliassen–Palm Flux Divergence in the Mesosphere and Lower Thermosphere from TIMED/SABER Temperatures
(American Meteorological Society, 2008)For migrating tides or fast-moving planetary waves, polarization relations derived from the linear wave equations are required to accurately derive the wind components from the temperature field. A common problem in ... -
The Frontogenetical Forcing of Secondary Circulations. Part II: Properties of Q Vectors in Exact Linear Solutions
(American Meteorological Society, 2009)An exact solution of the primitive equations (PEs) and the corresponding exact solutions of the alternative balance (AB), geostrophic momentum (GM), and quasigeostrophic (QG) equations are presented. The PE solution ... -
Predictability of Rotating Stratified Turbulence
(American Meteorological Society, 2009)Although predictability represents one of the fundamental problems in atmospheric science, gaps in our knowledge remain. Theoretical understanding of the inverse error cascade is limited mostly to homogeneous, isotropic ... -
A Continuum of Sudden Stratospheric Warmings
(American Meteorological Society, 2009)The k-means cluster technique is used to examine 43 yr of daily winter Northern Hemisphere (NH) polar stratospheric data from the 40-yr ECMWF Re-Analysis (ERA-40). The results show that the NH winter stratosphere exists ... -
Formation of Jets and Equatorial Superrotation on Jupiter
(American Meteorological Society, 2009)The zonal flow in Jupiter?s upper troposphere is organized into alternating retrograde and prograde jets, with a prograde (superrotating) jet at the equator. Existing models posit as the driver of the flow either differential ... -
Interannual Variability and Trends of Extratropical Ozone. Part II: Southern Hemisphere
(American Meteorological Society, 2008)A principal component analysis (PCA) is applied to the Southern Hemisphere (SH) total column ozone following the method established for analyzing the data in the Northern Hemisphere (NH) in a companion paper. The interannual ... -
Radiative Constraints on the Hydrological Cycle in an Idealized Radiative–Convective Equilibrium Model
(American Meteorological Society, 2009)The radiative constraints on the partitioning of the surface energy budget and, hence, on the strength of the hydrological cycle are analyzed in an idealized one-dimensional radiative?convective equilibrium model formulated ... -
Wind–Evaporation Feedback and the Axisymmetric Transition to Angular Momentum–Conserving Hadley Flow
(American Meteorological Society, 2008)The effect of wind-induced surface heat exchange (WISHE) on axisymmetric, solstitial Hadley circulations is examined for forcings strong enough to produce meridional flow that nearly conserves absolute angular momentum in ... -
Planetary Wave Breaking and Tropospheric Forcing as Seen in the Stratospheric Sudden Warming of 2006
(American Meteorological Society, 2009)The major stratospheric sudden warming (SSW) of January 2006 is examined using meteorological fields from Goddard Earth Observing System version 4 (GEOS-4) analyses and forecast fields from the Navy Operational Global ... -
Dynamics of Prediction Errors under the Combined Effect of Initial Condition and Model Errors
(American Meteorological Society, 2009)The transient evolution of prediction errors in the short to intermediate time regime is considered under the combined effect of initial condition and model errors. Some generic features are brought out and connected with ... -
Investigation of Droplet Size Distributions and Drizzle Formation Using A New Trajectory Ensemble Model. Part II: Lucky Parcels
(American Meteorological Society, 2009)A novel trajectory ensemble model of the cloud-topped boundary layer containing 1340 Lagrangian parcels moving with a turbulent-like flow with the observed statistical properties was applied to investigate the formation ...