Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3821-3840 of 13215
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Influence of the Quasi-Biennial Oscillation on the Extratropical Winter Stratosphere in an Atmospheric General Circulation Model and in Reanalysis Data
(American Meteorological Society, 2009)The interannual variability of the stratospheric polar vortex during winter in both hemispheres is observed to correlate strongly with the phase of the quasi-biennial oscillation (QBO) in tropical stratospheric winds. It ... -
A Study of Microphysical Mechanisms for Correlation Patterns between Droplet Radius and Optical Thickness of Warm Clouds with a Spectral Bin Microphysics Cloud Model
(American Meteorological Society, 2009)This study investigates the correlation patterns between cloud droplet effective radius (CDR) and cloud optical thickness (COT) of warm clouds with a nonhydrostatic spectral bin microphysics cloud model. Numerical experiments ... -
Temporal Relations of Column Water Vapor and Tropical Precipitation
(American Meteorological Society, 2009)Empirical studies using satellite data and radiosondes have shown that precipitation increases with column water vapor (CWV) in the tropics, and that this increase is much steeper above some critical CWV value. Here, eight ... -
Transient Environmental Sensitivities of Explicitly Simulated Tropical Convection
(American Meteorological Society, 2009)A three-dimensional cloud-resolving model, maintained in a statistically steady convecting state by tropics-like forcing, is subjected to sudden (10 min) stimuli consisting of horizontally homogeneous temperature and/or ... -
Energy Flux and Wavelet Diagnostics of Secondary Mountain Waves
(American Meteorological Society, 2010)In recent years, aircraft data from mountain waves have been primarily analyzed using velocity and temperature power spectrum and momentum flux estimation. Herein it is argued that energy flux wavelets (i.e., pressure?velocity ... -
Reply
(American Meteorological Society, 2009) -
Droplet Growth in Warm Water Clouds Observed by the A-Train. Part I: Sensitivity Analysis of the MODIS-Derived Cloud Droplet Sizes
(American Meteorological Society, 2009)This study examines the sensitivity of the retrieved cloud droplet radii (CDR) to the vertical inhomogeneity of droplet radii, including the existence of a drizzle mode in clouds. The focus of this study is warm water-phase ... -
Low-Frequency Climate Response and Fluctuation–Dissipation Theorems: Theory and Practice
(American Meteorological Society, 2009)The low-frequency response to changes in external forcing or other parameters for various components of the climate system is a central problem of contemporary climate change science. The fluctuation?dissipation theorem ... -
Jet Alignment in a Two-Layer Quasigeostrophic Channel Using One-Dimensional Grid Warping
(American Meteorological Society, 2009)Because of position errors traditional methods of data assimilation can broaden and weaken jets or other flow structures leading to reduced forecast skill. Here a technique to assimilate properties of coherent structures ... -
Linear Response Functions of a Cumulus Ensemble to Temperature and Moisture Perturbations and Implications for the Dynamics of Convectively Coupled Waves
(American Meteorological Society, 2009)An approach is presented for the construction of linear response functions of a cumulus ensemble to large-scale temperature and moisture perturbations using a cloud system?resolving model (CSRM). A set of time-invariant, ... -
Thermodynamic Coupled Modes in the Tropical Atmosphere–Ocean: An Analytical Solution
(American Meteorological Society, 2009)The present study provides a consistent and unified solution for the two types of thermodynamical coupled modes in the atmosphere?ocean climate system: the tropical meridional mode and the subtropical dipole mode. The ... -
Patterns of Wintertime Jet Stream Variability and Their Relation to the Storm Tracks
(American Meteorological Society, 2009)A new approach is put forward for defining extratropical teleconnection patterns. The zonal wind field at 250 hPa is analyzed separately in the North Atlantic and North Pacific Ocean sectors during the winter season ... -
Environmental Controls on the Simulated Diurnal Cycle of Warm-Season Precipitation in the Continental United States
(American Meteorological Society, 2009)The diurnal cycle of warm-season precipitation in the Rocky Mountains and adjacent Great Plains of the United States is examined using a numerical modeling framework designed to isolate the role of terrain-influenced ... -
Comments on “Sigma-Point Kalman Filter Data Assimilation Methods for Strongly Nonlinear Systems”
(American Meteorological Society, 2009) -
Diurnal Variations of Global Thunderstorms and Electrified Shower Clouds and Their Contribution to the Global Electrical Circuit
(American Meteorological Society, 2010)The long-standing mainstay of support for C. T. R. Wilson?s global circuit hypothesis is the similarity between the diurnal variation of thunderstorm days in universal time and the Carnegie curve of electrical potential ... -
An Assessment of the Surface Longwave Direct Radiative Effect of Airborne Saharan Dust during the NAMMA Field Campaign
(American Meteorological Society, 2009)In September 2006, NASA Goddard?s mobile ground-based laboratories were deployed to Sal Island in Cape Verde (16.73°N, 22.93°W) to support the NASA African Monsoon Multidisciplinary Analysis (NAMMA) field study. The ... -
Structure of the Atmospheric Boundary Layer in the Vicinity of a Developing Upslope Flow System: A Numerical Model Study
(American Meteorological Society, 2010)The development of a morning upslope flow is studied by means of idealized numerical simulations. In particular, two cases are examined: a plane slope connecting a lower plain and an elevated plateau and a symmetric mountain ... -
A Case Study: The Indirect Aerosol Effects of Mineral Dust on Warm Clouds
(American Meteorological Society, 2010)The indirect aerosol effect (Twomey effect) is studied during a Saharan dust-transport event that presented an unusually favorable combination of a dust-loading gradient across clouds with warm cloud-top temperatures. ... -
CORRIGENDUM
(American Meteorological Society, 2009) -
Gravity Waves, Dynamical Resistance, and Forcing Efficiency
(American Meteorological Society, 2009)The effect of the dynamical response associated with high-frequency gravity waves on the total energy generated by imposed heating is examined in a 2D linear compressible model. The work performed by waves against a sustained ...