Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2381-2400 of 13215
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Data Assimilation as a Problem in Optimal Tracking: Application of Pontryagin’s Minimum Principle to Atmospheric Science
(American Meteorological Society, 2012)data assimilation strategy based on feedback control has been developed for the geophysical sciences?a strategy that uses model output to control the behavior of the dynamical system. Whereas optimal tracking through ... -
Time Scales of the Trade Wind Boundary Layer Adjustment
(American Meteorological Society, 2012)he adjustment of the trade wind atmospheric boundary layer to an abrupt sea surface warming is investigated using a large-eddy simulation (LES) and two simple bulk models: a mixed-layer model (MLM), and a model based on ... -
Deducing Multidecadal Anthropogenic Global Warming Trends Using Multiple Regression Analysis
(American Meteorological Society, 2012)o unmask the anthropogenic global warming trend imbedded in the climate data, multiple linear regression analysis is often employed to filter out short-term fluctuations caused by El Niño?Southern Oscillation (ENSO), volcano ... -
Observed Tropospheric Temperature Response to 11-yr Solar Cycle and What It Reveals about Mechanisms
(American Meteorological Society, 2012)sing 54 yr of NCEP reanalysis global data from 1000 to 10 hPa, this study establishes the existence and the statistical significance of the zonal-mean temperature response to the 11-yr solar cycle throughout the troposphere ... -
A Multisensor Observational Depiction of the Transition from Light to Heavy Rainfall on Subdaily Time Scales
(American Meteorological Society, 2013)tilizing data from the Quick Scatterometer (QuikSCAT), a new observational parameter related to mesoscale cold pool activity [termed cold pool kinetic energy (CPKE)] is developed and investigated. CPKE and the Climate ... -
The Effect of Climate Change on the Variability of the Northern Hemisphere Stratospheric Polar Vortex
(American Meteorological Society, 2012)ith extreme variability of the Arctic polar vortex being a key link for stratosphere?troposphere influences, its evolution into the twenty-first century is important for projections of changing surface climate in response ... -
Determination of Extratropical Tropopause Height in an Idealized Gray Radiation Model
(American Meteorological Society, 2013)his paper investigates the mechanisms that determine the extratropical tropopause height, extending previous results with a Newtonian cooling model. A primitive equation model forced by a meridional gradient of incoming ... -
Detecting Signals from Data with Noise: Theory and Applications
(American Meteorological Society, 2012)ignal detection from noisy data by rejecting a noise null hypothesis depends critically on a priori assumptions regarding the background noise and the associated statistical methods. Rejecting one kind of noise null ... -
Isentropic Analysis of Convective Motions
(American Meteorological Society, 2013)his paper analyzes the convective mass transport by sorting air parcels in terms of their equivalent potential temperature to determine an isentropic streamfunction. By averaging the vertical mass flux at a constant value ... -
Microphysical Structure of the Marine Boundary Layer under Strong Wind and Sea Spray Formation as Seen from a 2D Explicit Microphysical Model. Part III: Parameterization of Height-Dependent Droplet Size Distribution
(American Meteorological Society, 2013)his paper completes a series of studies using a 2D hybrid Lagrangian?Eulerian model to investigate the effect of sea spray on the thermodynamics and microphysics of the hurricane mixed layer. The evolution of the mixed ... -
Prediction of Graupel Density in a Bulk Microphysics Scheme
(American Meteorological Society, 2012)method to predict the bulk density of graupel ?g has been added to the two-moment Milbrandt?Yau bulk microphysics scheme. The simulation of graupel using the modified scheme is illustrated through idealized simulations of ... -
Large-Scale Errors and Mesoscale Predictability in Pacific Northwest Snowstorms
(American Meteorological Society, 2012)he predictability of lowland snow in the Puget Sound region of the Pacific Northwest is explored by analyzing the spread in 100-member ensemble simulations for two events from December 2008. Sensitivities to the microphysical ... -
Scale Localization of Cloud Particle Clustering Statistics
(American Meteorological Society, 2012)ecent work has examined the spatial distribution of droplets within a cloud. Experimentally, most studies analyze interevent times from static probes flown linearly through a cloud, allowing the spatial information to be ... -
On the Use of Doppler Radar–Derived Wind Fields to Diagnose the Secondary Circulations of Tornadoes
(American Meteorological Society, 2012)number of studies in recent years have used wind fields derived from portable Doppler radars in combination with the ground-based velocity track display (GBVTD) technique to diagnose the primary (tangential) and secondary ... -
A Frictional Skeleton Model for the Madden–Julian Oscillation
(American Meteorological Society, 2012)he Madden?Julian oscillation (MJO) is a multiscale system. A skeleton model, developed by Majda and Stechmann, can capture some of planetary-scale aspects of observed features such as slow eastward propagation, nondispersive ... -
Mesoscale Variations of the Atmospheric Snow Line over the Northern Sierra Nevada: Multiyear Statistics, Case Study, and Mechanisms
(American Meteorological Society, 2012)bservations from several mountain ranges reveal that the height of the transition from snowfall to rainfall, the snow line, can intersect the terrain at an elevation hundreds of meters below its elevation in the free air ... -
Aerosol Effects of the Condensation Process on a Convective Cloud Simulation
(American Meteorological Society, 2013)sing a nonhydrostatic model with a double-moment bulk cloud microphysics scheme, the authors introduce an aerosol effect on a convective cloud system by accelerating the condensation and evaporation processes (the aerosol ... -
On Thermally Forced Circulations over Heated Terrain
(American Meteorological Society, 2012)combination of analytical and numerical models is used to gain insight into the dynamics of thermally forced circulations over diurnally heated terrain. Solutions are obtained for two-layer flows (representing the boundary ... -
Rossby Wave Breaking and Transport between the Tropics and Extratropics above the Subtropical Jet
(American Meteorological Society, 2012)ossby wave breaking is an important mechanism for the two-way exchange of air between the tropical upper troposphere and lower stratosphere and the extratropical lower stratosphere. The authors present a 30-yr climatology ... -
CORRIGENDUM
(American Meteorological Society, 2012)