Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2581-2600 of 13215
-
Ice Growth from the Vapor at −5°C
(American Meteorological Society, 2012)esults are summarized and illustrated from a long series of experiments on ice growth from the vapor, nearly all in a very small range of conditions: ?5°C, slightly below liquid water saturation, with minimal environmental ... -
Solar Cycle Signals in the Pacific and the Issue of Timings
(American Meteorological Society, 2012)he solar cycle signal in sea level pressure during 1856?2007 is analyzed. Using composites of data from January?February in solar cycle peak years the strong positive signal in the region of the Aleutian low, found by ... -
Responses of Shallow Cumulus Convection to Large-Scale Temperature and Moisture Perturbations: A Comparison of Large-Eddy Simulations and a Convective Parameterization Based on Stochastically Entraining Parcels
(American Meteorological Society, 2012)esponses of shallow cumuli to large-scale temperature/moisture perturbations are examined through diagnostics of large-eddy simulations (LESs) of the undisturbed Barbados Oceanographic and Meteorological Experiment (BOMEX) ... -
A Stochastic Model for the Transition to Strong Convection
(American Meteorological Society, 2011)simple stochastic model is designed and analyzed in order to further understand the transition to strong convection. The transition has been characterized recently in observational data by an array of statistical measures, ... -
Microphysical Structure of the Marine Boundary Layer under Strong Wind and Spray Formation as Seen from Simulations Using a 2D Explicit Microphysical Model. Part II: The Role of Sea Spray
(American Meteorological Society, 2012)he effect of sea spray on the thermodynamics and microphysical structure of the lowest 400-m layer under strong wind speeds is investigated using a 2D hybrid Lagrangian?Eulerian model with spectral bin microphysics. A large ... -
Parameterization of Cloud Microphysics Based on Full Integral Moments
(American Meteorological Society, 2012)his paper describes a microphysics parameterization based on integral moments of the full drop size distributions (DSDs) as opposed to a partial moments approach (sometimes referred to as Kessler-type parameterization) ... -
Hypercooling in the Nocturnal Boundary Layer: Broadband Emissivity Schemes
(American Meteorological Society, 2012)roadband flux emissivity schemes are often used to model infrared radiative exchanges in the atmosphere. In particular, such schemes help highlight the interaction of radiation with other transport processes, an aspect ... -
A Numerical Sensitivity Study on the Impact of Soil Moisture on Convection-Related Parameters and Convective Precipitation over Complex Terrain
(American Meteorological Society, 2011)he impact of soil moisture on convection-related parameters and convective precipitation over complex terrain is studied by numerical experiments using the nonhydrostatic Consortium for Small-Scale Modeling (COSMO) model. ... -
Air–Sea Enthalpy and Momentum Exchange at Major Hurricane Wind Speeds Observed during CBLAST
(American Meteorological Society, 2012)uantifying air?sea exchanges of enthalpy and momentum is important for understanding and skillfully predicting tropical cyclone intensity, but the magnitude of the corresponding wind speed?dependent bulk exchange coefficients ... -
On the Northward Motion of Midlatitude Cyclones in a Barotropic Meandering Jet
(American Meteorological Society, 2012)he combined effects of the deformation (horizontal stretching and shearing) and nonlinearities on the beta drift of midlatitude cyclones are studied using a barotropic quasigeostrophic model on the beta plane. It is found ... -
Ice in Clouds Experiment–Layer Clouds. Part II: Testing Characteristics of Heterogeneous Ice Formation in Lee Wave Clouds
(American Meteorological Society, 2011)eterogeneous ice nucleation is a source of uncertainty in models that represent ice clouds. The primary goal of the Ice in Clouds Experiment?Layer Clouds (ICE-L) field campaign was to determine if a link can be demonstrated ... -
Enthalpy Transfer across the Air–Water Interface in High Winds Including Spray
(American Meteorological Society, 2012)ontrolled experiments were conducted in the Air?Sea Interaction Saltwater Tank (ASIST) at the University of Miami to investigate air?sea moist enthalpy transfer rates under various wind speeds (range of 0.6?39 m s?1 scaled ... -
Arctic Response to an MJO-Like Tropical Heating in an Idealized GCM
(American Meteorological Society, 2012)sing an initial-value approach with an idealized general circulation model, the mechanisms by which the Madden?Julian oscillation (MJO) influences the Arctic surface air temperature (SAT) are investigated. Model calculations ... -
The Effects of Changes in Sea Surface Temperature and CO2 Concentration on the Quasi-Biennial Oscillation
(American Meteorological Society, 2012)he effects of sea surface temperature (SST) and CO2 on future changes in the quasi-biennial oscillation (QBO) are investigated using a climate model that simulates the QBO without parameterized nonstationary gravity wave ... -
Bulk Convergence of Cloud-Resolving Simulations of Moist Convection over Complex Terrain
(American Meteorological Society, 2012)he explicit treatment of moist convection in cloud-resolving models with kilometer-scale horizontal resolution is increasingly used for atmospheric research and numerical weather prediction purposes. However, several ... -
CAPE in Tropical Cyclones
(American Meteorological Society, 2012)onvective available potential energy (CAPE) and the vertical distribution of buoyancy were calculated for more than 2000 dropsonde soundings collected by the NOAA Gulfstream-IV aircraft. Calculations were done with and ... -
Simulated Density Currents beneath Embedded Stratified Layers
(American Meteorological Society, 2012)he goal of this research is to investigate the impacts of a stably stratified layer embedded within a neutrally stratified environment on the behavior of density currents in an effort to extend the environmental regimes ... -
Steady-State Large-Eddy Simulations to Study the Stratocumulus to Shallow Cumulus Cloud Transition
(American Meteorological Society, 2012)his study presents a series of steady-state large-eddy simulations (LESs) to study the stratocumulus to shallow cumulus cloud transition. To represent the different stages of what can be interpreted as an Eulerian view of ... -
Detailed Investigation of the Self-Aggregation of Convection in Cloud-Resolving Simulations
(American Meteorological Society, 2012)n models of radiative?convective equilibrium it is known that convection can spontaneously aggregate into one single localized moist region if the domain is large enough. The large changes in the mean climate state and ... -
Comparison of Simulated and Observed Continental Tropical Anvil Clouds and Their Radiative Heating Profiles
(American Meteorological Society, 2012)ertically pointing millimeter-wavelength radar observations of anvil clouds extending from mesoscale convective systems (MCSs) that pass over an Atmospheric Radiation Measurement Program (ARM) field site in Niamey, Niger, ...