Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3221-3240 of 13215
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Cross-Barrier Flow during Orographic Precipitation Events: Results from MAP and IMPROVE
(American Meteorological Society, 2005)Ground-based and airborne Doppler radar data collected during passage of frontal rainstorms over the European Alps and Cascade Mountains of Oregon are found to exhibit characteristic cross-barrier flow and precipitation ... -
The 13–14 December 2001 IMPROVE-2 Event. Part II: Comparisons of MM5 Model Simulations of Clouds and Precipitation with Observations
(American Meteorological Society, 2005)This paper compares airborne in situ observations of cloud microphysical parameters with the fifth-generation Pennsylvania State University?National Center for Atmospheric Research (PSU?NCAR) Mesoscale Model (MM5) simulations, ... -
The 13–14 December 2001 IMPROVE-2 Event. Part III: Simulated Microphysical Budgets and Sensitivity Studies
(American Meteorological Society, 2005)This paper investigates the microphysical pathways and sensitivities within the Reisner-2 bulk microphysical parameterization (BMP) of the fifth-generation Pennsylvania State University?National Center for Atmospheric ... -
Microphysical Processes and Synergistic Interaction between Frontal and Orographic Forcing of Precipitation during the 13 December 2001 IMPROVE-2 Event over the Oregon Cascades
(American Meteorological Society, 2005)On 13?14 December 2001 a vigorous cyclonic storm passed over the Pacific Northwest, producing heavy orographic precipitation over the Cascade Mountains. This storm was one of several studied during the second field phase ... -
The 13–14 December 2001 IMPROVE-2 Event. Part I: Synoptic and Mesoscale Evolution and Comparison with a Mesoscale Model Simulation
(American Meteorological Society, 2005)This paper describes the large-scale synoptic and mesoscale features of a major precipitation event that affected the second Improvement of Microphysical Parameterization through Observational Verification Experiment ... -
The Effects of the Full Coriolis Force on the Structure and Motion of a Tropical Cyclone. Part I: Effects due to Vertical Motion
(American Meteorological Society, 2005)In most dynamical studies of synoptic-scale phenomena, only the components of the Coriolis force contributed by the horizontal motion are considered, and only in the horizontal momentum equation. The other components are ... -
Equivalent-Barotropic Definition of Tropospheric Mean Temperature
(American Meteorological Society, 2005)An equivalent-barotropic (EB) description of the tropospheric temperature field is derived from the geostrophic empirical mode (GEM) in the form of a scalar function Γ(p, ?), where p is pressure and ? is 300?850-mb thickness. ... -
Mountain-Wave Momentum Flux in an Evolving Synoptic-Scale Flow
(American Meteorological Society, 2005)The evolution of mountain-wave-induced momentum flux is examined through idealized numerical simulations during the passage of a time-evolving synoptic-scale flow over an isolated 3D mountain of height h. The dynamically ... -
Estimating Cloud Optical Depth from Surface Radiometric Observations: Sensitivity to Instrument Noise and Aerosol Contamination
(American Meteorological Society, 2005)The spectral-difference algorithm of Barker and Marshak for inferring optical depth τ of broken clouds has been shown numerically to be potentially useful. Their method estimates cloud-base reflectance and τ using spectral ... -
The IMPROVE-1 Storm of 1–2 February 2001. Part II: Cloud Structures and the Growth of Precipitation
(American Meteorological Society, 2005)On 1?2 February 2001, a strong cyclonic storm system developed over the northeastern Pacific Ocean and moved onto the Washington coast. This storm was one of several that were documented during the first field phase of the ... -
The IMPROVE-1 Storm of 1–2 February 2001. Part I: Development of a Forward-Tilted Cold Front and a Warm Occlusion
(American Meteorological Society, 2005)Analysis of observations and the fifth-generation Pennsylvania State University?National Center for Atmospheric Research (PSU?NCAR) Mesoscale Model (MM5) are used to study the development of a forward-tilted cold front off ... -
Mesoscale Observations of the Genesis of Hurricane Dolly (1996)
(American Meteorological Society, 2005)Recent numerical studies of tropical cyclone genesis suggest a new paradigm for how the surface vortex is established based on a highly nonaxisymmetric mechanism involving the interaction of low-level cyclonic circulations ... -
Humidity Halos Surrounding Small Cumulus Clouds in a Tropical Environment
(American Meteorological Society, 2005)A large dataset of aircraft cloud traverses from the Small Cumulus Microphysics Study (SCMS) was used to add to the existing knowledge of humidity halo characteristics for small cumulus clouds in a tropical environment. ... -
Influence of Western North Pacific Tropical Cyclones on Their Large-Scale Environment
(American Meteorological Society, 2005)The authors investigate the influence of western North Pacific (WNP) tropical cyclones (TCs) on their large-scale environment by lag regressing various large-scale climate variables [atmospheric temperature, winds, relative ... -
A Multimoment Bulk Microphysics Parameterization. Part II: A Proposed Three-Moment Closure and Scheme Description
(American Meteorological Society, 2005)Many two-moment bulk schemes use a three-parameter gamma distribution of the form N(D) = N0Dαe??D to describe the size spectrum of a given hydrometeor category. These schemes predict changes to the mass content and the ... -
Net Exchange Reformulation of Radiative Transfer in the CO2 15-μm Band on Mars
(American Meteorological Society, 2005)The net exchange formulation (NEF) is an alternative to the usual radiative transfer formulation. It was proposed by two authors in 1967, but until now, this formulation has been used only in a very few cases for atmospheric ... -
The Continuum and Dynamics of Northern Hemisphere Teleconnection Patterns
(American Meteorological Society, 2005)This study presents an alternative interpretation for Northern Hemisphere teleconnection patterns. Rather than comprising several different recurrent regimes, this study suggests that there is a continuum of teleconnection ... -
Observations of Entrainment in Eastern Pacific Marine Stratocumulus Using Three Conserved Scalars
(American Meteorological Society, 2005)Fast measurements of three scalars, ozone, dimethyl sulfide (DMS), and total water, are used to investigate the entrainment process in the stratocumulus-topped boundary layer (STBL) observed over the eastern subtropical ... -
Predictability Studies of the Intraseasonal Oscillation with the ECHAM5 GCM
(American Meteorological Society, 2005)Our ability to predict active and break periods of the Asian summer monsoon is intimately tied to our ability to predict the intraseasonal oscillation (ISO). The present study analyzes the upper limit of potential ... -
A Multimoment Bulk Microphysics Parameterization. Part I: Analysis of the Role of the Spectral Shape Parameter
(American Meteorological Society, 2005)With increasing computer power, explicit microphysics schemes are becoming increasingly important in atmospheric models. Many schemes have followed the approach of Kessler in which one moment of the hydrometeor size ...