Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3181-3200 of 13215
-
Factors Affecting the Evolution of Hurricane Erin (2001) and the Distributions of Hydrometeors: Role of Microphysical Processes
(American Meteorological Society, 2006)Fine-resolution simulations of Hurricane Erin are conducted using the fifth-generation Pennsylvania State University?NCAR Mesoscale Model (MM5) to investigate roles of thermodynamic, boundary layer, and microphysical ... -
Mesoscale Aspects of the Downshear Reformation of a Tropical Cyclone
(American Meteorological Society, 2006)The downshear reformation of Tropical Storm Gabrielle (2001) was investigated using radar reflectivity and lightning data that were nearly continuous in time, as well as frequent aircraft reconnaissance flights. Initially ... -
Drop Size Ambiguities in the Retrieval of Precipitation Profiles from Dual-Frequency Radar Measurements
(American Meteorological Society, 2006)The threat of flooding from landfalling tropical cyclones is a function of the local variation in rain rate and rain accumulation. To date, these have been inferred from single-frequency radar reflectivity measurements. ... -
Targeting and Data Assimilation Studies during Hurricane Humberto (2001)
(American Meteorological Society, 2006)Two operational synoptic surveillance missions were conducted by the National Oceanic and Atmospheric Administration into Hurricane Humberto (2001). Forecasts from two leading dynamical hurricane track forecast models were ... -
A Photograph of a Wavenumber-2 Asymmetry in the Eye of Hurricane Erin
(American Meteorological Society, 2006)A photograph of a wavenumber-2 asymmetry in the eye of Hurricane Erin taken during a NOAA WP-3D research flight during the Fourth Convection and Moisture Experiment (CAMEX-4) field program on 10 September 2001 is described. ... -
X-band Polarimetric Radar Rainfall Measurements in Keys Area Microphysics Project
(American Meteorological Society, 2006)The Keys Area Microphysics Project (KAMP), conducted as part of NASA?s Fourth Convective and Moisture Experiment (CAMEX-4) in the lower Keys area, deployed a number of ground radars and four arrays of rain gauge and ... -
Estimation of Oceanic Precipitation Efficiency in Cloud Models
(American Meteorological Society, 2005)Precipitation efficiency is estimated based on vertically integrated budgets of water vapor and clouds using hourly data from both two-dimensional (2D) and three-dimensional (3D) cloud-resolving simulations. The 2D ... -
Dynamical Processes of Equatorial Atmospheric Angular Momentum
(American Meteorological Society, 2006)The dynamical processes that drive intraseasonal equatorial atmospheric angular momentum (EAAM) fluctuations are examined with the National Centers for Environmental Prediction?National Center for Atmospheric Research ... -
The 29 June 2000 Supercell Observed during STEPS. Part I: Kinematics and Microphysics
(American Meteorological Society, 2005)This is a two-part study that addresses the kinematic, microphysical, and electrical aspects of a severe storm that occurred in western Kansas on 29 June 2000 observed during the Severe Thunderstorm Electrification and ... -
A Barotropic Envelope Rossby Soliton Model for Block–Eddy Interaction. Part IV: Block Activity and Its Linkage with a Sheared Environment
(American Meteorological Society, 2005)In this paper, a basic-state flow that has a linear, weak meridional shear is used as a mean flow condition to see if the blocking activity is related to the state of the zonal mean flow based upon the envelope soliton ... -
Large-Scale Modes in a Rotating Atmosphere with Radiative–Convective Instability and WISHE
(American Meteorological Society, 2005)A highly simplified parameterization of diabatic processes is applied to linearized equations on a equatorial beta plane. The diabatic processes include moist convection, cloud?radiation interactions (CRI), and wind-induced ... -
Observations and Analysis of Uncorrelated Rain
(American Meteorological Society, 2005)Most microphysical models in precipitation physics and radar meteorology assume (at least implicitly) that raindrops are completely uncorrelated in space and time. Yet, several recent studies have indicated that raindrop ... -
Study of the Aerosol Indirect Effect by Large-Eddy Simulation of Marine Stratocumulus
(American Meteorological Society, 2005)A total of 98 three-dimensional large-eddy simulations (LESs) of marine stratocumulus clouds covering both nighttime and daytime conditions were performed to explore the response of cloud optical depth (τ) to various aerosol ... -
Dynamic Instabilities of Simulated Hurricane-like Vortices and Their Impacts on the Core Structure of Hurricanes. Part I: Dry Experiments
(American Meteorological Society, 2005)A series of numerical simulations of dry, axisymmetric hurricane-like vortices is performed to examine the growth of barotropic and baroclinic eddies and their potential impacts on hurricane core structure and intensity. ... -
The Role of Deformation and Potential Vorticity in Southern Hemisphere Blocking Onsets
(American Meteorological Society, 2005)The relative importance of interactions between deformation and potential vorticity (PV) as a block-onset mechanism is examined in 30 cases of atmospheric blocking over the Southern Hemisphere (SH). The blocking cases are ... -
Low-Level Mesocyclonic Concentration by Nonaxisymmetric Transport. Part II: Vorticity Dynamics
(American Meteorological Society, 2006)An idealized supercell simulation using the Regional Atmospheric Modeling System (RAMS) produced an elongated low-level mesocyclone that subsequently collapsed into a concentrated vortex. Though vorticity continually ... -
Influences of Asymmetric Heating on Hurricane Evolution in the MM5
(American Meteorological Society, 2005)While previous idealized studies have demonstrated the importance of asymmetric atmospheric features in the intensification of a symmetric tropical cyclone vortex, the role of convectively generated asymmetries in creating ... -
A New Method for Detection of Cirrus Overlapping Water Clouds and Determination of Their Optical Properties
(American Meteorological Society, 2005)The frequent occurrence of high cirrus overlapping low water cloud poses a major challenge in retrieving their optical properties from spaceborne sensors. This paper presents a novel retrieval method that takes full advantage ... -
Stirring and Mixing in Two-Dimensional Divergent Flow
(American Meteorological Society, 2005)While stirring and mixing properties in the stratosphere are reasonably well understood in the context of balanced (slow) dynamics, as is evidenced in numerous studies of chaotic advection, the strongly enhanced presence ... -
Atmospheric Factors Governing Banded Orographic Convection
(American Meteorological Society, 2005)The three-dimensional structure of shallow orographic convection is investigated through simulations performed with a cloud-resolving numerical model. In moist flows that overcome a given topographic barrier to form ...