Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2001-2020 of 13215
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Modulation of Shallow-Water Equatorial Waves due to a Varying Equivalent Height Background
(American Meteorological Society, 2013)he dynamics of convectively coupled equatorial waves (CCEWs) is analyzed in an idealized model of the large-scale atmospheric circulation. The model is composed of a linear rotating shallow-water system with a variable ... -
Large-Eddy Simulation of a Residual Layer: Low-Level Jet, Convective Rolls, and Kelvin–Helmholtz Instability
(American Meteorological Society, 2014)iurnal variations of an atmospheric boundary layer from 0900 LST on day 33 to 0600 LST on day 34 of the Wangara experiment are studied using a large-eddy simulation (LES) model that includes longwave radiation and ... -
Wind Speed Control of Tropical Orographic Convection
(American Meteorological Society, 2014)his study compares observations from the Dominica Experiment (DOMEX) field campaign with 3D and 2D Weather Research and Forecasting Model (WRF) simulations to understand how ambient upstream wind speed controls the transition ... -
Sudden Track Changes of Tropical Cyclones in Monsoon Gyres: Full-Physics, Idealized Numerical Experiments
(American Meteorological Society, 2014)ropical cyclones (TCs) in the eastern semicircle of large-scale monsoon gyres (MGs) were observed to take either a northward (sudden northward and northward without a sharp turn) or a westward TC turn, but only the northward ... -
On the Choice of Average Solar Zenith Angle
(American Meteorological Society, 2014)dealized climate modeling studies often choose to neglect spatiotemporal variations in solar radiation, but doing so comes with an important decision about how to average solar radiation in space and time. Since both ... -
Scaling of Off-Equatorial Jets in Giant Planet Atmospheres
(American Meteorological Society, 2014)n the off-equatorial region of Jupiter?s and Saturn?s atmospheres, baroclinic eddies transport angular momentum out of retrograde and into prograde jets. In a statistically steady state, this angular momentum transfer by ... -
Poleward Stationary Eddy Heat Transport by the Tibetan Plateau and Equatorward Shift of Westerlies during Northern Winter
(American Meteorological Society, 2013)he orographic effect of the Tibetan Plateau on atmospheric poleward heat transport is investigated using an atmospheric general circulation model. The linear interference between the Tibetan Plateau?induced winds and the ... -
Sea Surface Temperature Anomalies off Baja California: A Possible Precursor of ENSO
(American Meteorological Society, 2014)any recent studies have shown that observed El Niño?Southern Oscillation (ENSO) events are spatially and temporally diverse and that they have undergone changes in characteristics. To quantitatively capture these features, ... -
Summer Season Squall-Line Simulations: Sensitivity of Gravity Waves to Physics Parameterization and Implications for Their Parameterization in Global Climate Models
(American Meteorological Society, 2014)ravity waves have important effects on the middle atmosphere circulation, and those generated by convection are prevalent in the tropics and summer midlatitudes. Numerous case studies have been carried out to investigate ... -
Microphysical Characteristics of Overshooting Convection from Polarimetric Radar Observations
(American Meteorological Society, 2014)he authors present observations of the microphysical characteristics of deep convection that overshoots the altitude of the extratropical tropopause from analysis of the polarimetric radar variables of radar reflectivity ... -
A Unified Representation of Deep Moist Convection in Numerical Modeling of the Atmosphere. Part II
(American Meteorological Society, 2014)n Part I of this paper, a generalized modeling framework for representing deep moist convection was presented. The framework, called unified parameterization, effectively unifies the parameterizations in general circulation ... -
The Turbulent Structure and Diurnal Growth of the Saharan Atmospheric Boundary Layer
(American Meteorological Society, 2014)he turbulent structure and growth of the remote Saharan atmospheric boundary layer (ABL) is described with in situ radiosonde and aircraft measurements and a large-eddy simulation model. A month of radiosonde data from ... -
Scaling Laws for the Heterogeneously Heated Free Convective Boundary Layer
(American Meteorological Society, 2014)he heterogeneously heated free convective boundary layer (CBL) is investigated by means of dimensional analysis and results from large-eddy simulations (LES) and direct numerical simulations (DNS). The investigated physical ... -
Dual-Doppler-Derived Profiles of the Southwesterly Flow Associated with Southwest and Ordinary Typhoons off the Southwestern Coast of Taiwan
(American Meteorological Society, 2014)his study used ground-based dual-Doppler observations to explore an understanding of kinematic characteristics of the southwesterly flow associated with the southwest (SW) and ordinary (OR) typhoons immediately off the ... -
Eastward-Propagating Intraseasonal Oscillation Represented by Chikira–Sugiyama Cumulus Parameterization. Part II: Understanding Moisture Variation under Weak Temperature Gradient Balance
(American Meteorological Society, 2013)he eastward-propagating intraseasonal oscillation represented by the Chikira?Sugiyama cumulus scheme in a general circulation model was investigated focusing on the variation of the free-tropospheric humidity. The net ... -
Water Vapor Budget in a Developing Tropical Cyclone and Its Implication for Tropical Cyclone Formation
(American Meteorological Society, 2014)volution of the water vapor budget from the tropical wave stage to the tropical cyclone stage is examined using a high-resolution numerical model simulation. The focus is on a time window from 27 h prior to genesis to 9 h ... -
Theory of Time-Dependent Freezing. Part II: Scheme for Freezing Raindrops and Simulations by a Cloud Model with Spectral Bin Microphysics
(American Meteorological Society, 2014)he time-dependent process of raindrop freezing is described in a general form, including thermodynamic effects from the accretion of cloud liquid and cloud ice. Freezing drops (FDs) larger than 80 ?m (and their water mass) ... -
A Closer Look at Boundary Layer Inversion in Large-Eddy Simulations and Bulk Models: Buoyancy-Driven Case
(American Meteorological Society, 2014)he inversion layer (IL) of a clear-sky, buoyancy-driven convective boundary layer is investigated using large-eddy simulations covering a wide range of convective Richardson numbers. A new model of the IL is suggested and ... -
Convective Characteristics of the Madden–Julian Oscillation over the Central Indian Ocean Observed by Shipborne Radar during DYNAMO
(American Meteorological Society, 2014)his study investigates the convective population and environmental conditions during three MJO events over the central Indian Ocean in late 2011 using measurements collected from the Research Vessel (R/V) Roger Revelle ... -
A Theoretical Study on the Spontaneous Radiation of Inertia–Gravity Waves Using the Renormalization Group Method. Part II: Verification of the Theoretical Equations by Numerical Simulation
(American Meteorological Society, 2014)he renormalization group equations (RGEs) describing spontaneous inertia?gravity wave (GW) radiation from part of a balanced flow through a quasi resonance that were derived in a companion paper by Yasuda et al. are validated ...