Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1681-1700 of 13215
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Diagnosis of Middle-Atmosphere Climate Sensitivity by the Climate Feedback–Response Analysis Method
(American Meteorological Society, 2015)he authors present a new method to diagnose the middle-atmosphere climate sensitivity by extending the climate feedback?response analysis method (CFRAM) for the coupled atmosphere?surface system to the middle atmosphere. ... -
Increase in Aerosol Black Carbon in the 2000s over Ny-Ålesund in the Summer
(American Meteorological Society, 2015)o investigate the concentrations, sources, and temporal variations of atmospheric black carbon (BC) in the summer Arctic, routine ground-level observations of BC by optical absorption were made in the summer from 2005 to ... -
The Latitudinal Dependence of Atmospheric Jet Scales and Macroturbulent Energy Cascades
(American Meteorological Society, 2015)he latitudinal width of atmospheric eddy-driven jets and scales of macroturbulence are examined latitude by latitude over a wide range of rotation rates using a high-resolution idealized GCM. It is found that for each ... -
Synthesis of Vortex Rossby Waves. Part I: Episodically Forced Waves in the Inner Waveguide
(American Meteorological Society, 2015)piral cloud bands dominate tropical cyclones? appearance in satellite and radar images. It is generally accepted that at least some of them are vortex Rossby waves that propagate on the radial gradient of mean-flow-relative ... -
Organized Convection Parameterization for the ITCZ
(American Meteorological Society, 2015)esoscale convective systems (MCSs) are of fundamental importance in the dynamics of the atmospheric circulation and the climate system. They are often observed to develop over significant terrain in ambient shear flows in ... -
Bacterial Communities in Marine Aerosols Revealed by 454 Pyrosequencing of the 16S rRNA Gene
(American Meteorological Society, 2015)lthough bacteria are an important biological component of aerosol particles, studies of bacterial communities in remote marine aerosol are largely lacking. In this study, aerosol samples were collected over the western ... -
Synthesis of Vortex Rossby Waves. Part II: Vortex Motion and Waves in the Outer Waveguide
(American Meteorological Society, 2015)eta, the meridional gradient of planetary vorticity, causes tropical cyclones to propagate poleward and westward at approximately 2 m s?1. In a previous shallow-water linear model, the simulated vortex accelerated without ... -
Cluster Analysis of Northern Hemisphere Wintertime 500-hPa Flow Regimes during 1920–2014
(American Meteorological Society, 2015)lusters in the Northern Hemisphere wintertime, 10-day low-pass-filtered 500-hPa height field are identified using the method of self-organizing maps (SOMs). Results are based on 1) a 57-winter record of ERA and 2) a 93-winter ... -
The Fluctuation–Dissipation Theorem Revisited: Beyond the Gaussian Approximation
(American Meteorological Society, 2015)linear response theory of systems of interest in atmospheric and climate dynamics taking fully into account the nonlinearities of the underlying processes is developed. Under the assumption that the source of intrinsic ... -
Determination of Convective Boundary Layer Entrainment Fluxes, Dissipation Rates, and the Molecular Destruction of Variances: Theoretical Description and a Strategy for Its Confirmation with a Novel Lidar System Synergy
(American Meteorological Society, 2015)tmospheric variables in the convective boundary layer (CBL), which are critical for turbulence parameterizations in weather and climate models, are assessed. These include entrainment fluxes, higher-order moments of humidity, ... -
Three-Dimensional Structure and Evolution of the Moisture Field in the MJO
(American Meteorological Society, 2015)he large-scale circulation features that determine the structure and evolution of MJO-related moisture and precipitation fields are examined using a linear analysis protocol based on daily 850- minus 150-hPa global velocity ... -
Concentration, Size Distribution, and Formation of Trimethylaminium and Dimethylaminium Ions in Atmospheric Particles over Marginal Seas of China
(American Meteorological Society, 2015)n this paper, the concentration, the size distribution, and the formation of dimethylaminium (DMA+) and trimethylaminium (TMA+) ions in atmospheric particles were studied during a cruise campaign over the Yellow Sea and ... -
Sensitivity of Precipitation Accumulation in Elevated Convective Systems to Small Changes in Low-Level Moisture
(American Meteorological Society, 2015)sing a method for initiating a quasi-stationary, heavy-rain-producing elevated mesoscale convective system in an idealized numerical modeling framework, a series of experiments is conducted in which a shallow layer of drier ... -
The Formation of Small-Scale Atmospheric Vortices via Baroclinic Horizontal Shearing Instability
(American Meteorological Society, 2015)his study presents a series of idealized simulations that attempt to replicate shear zones typical of drylines and other near-surface boundaries in the presence of horizontal virtual density gradients. The series of dry ... -
On the Rapid Intensification of Hurricane Wilma (2005). Part III: Effects of Latent Heat of Fusion
(American Meteorological Society, 2015)he impacts of the latent heat of fusion on the rapid intensification (RI) of Hurricane Wilma (2005) are examined by comparing a 72-h control simulation (CTL) of the storm to a sensitivity simulation in which the latent ... -
Impacts of Free-Tropospheric Temperature and Humidity on Nocturnal Nonprecipitating Marine Stratocumulus
(American Meteorological Society, 2015)arine stratocumulus (MSc) cloud amount can decrease with an increase in the cloud-top instability parameter ?, based on the cloud-top entrainment instability (CTEI) theory. Notice that if boundary layer temperature and ... -
Dynamic Linkage between Cold Air Outbreaks and Intensity Variations of the Meridional Mass Circulation
(American Meteorological Society, 2015)his study investigates the dynamical linkage between the meridional mass circulation and cold air outbreaks using the ERA-Interim data covering the period 1979?2011. It is found that the onset date of continental-scale ... -
Wave-Induced Boundary Layer Separation in the Lee of the Medicine Bow Mountains. Part II: Numerical Modeling
(American Meteorological Society, 2015)ountain waves and rotors in the lee of the Medicine Bow Mountains in southeastern Wyoming are investigated in a two-part paper. Part I by French et al. delivers a detailed observational account of two rotor events: one ... -
Characteristics of the Drag Coefficient over a Tropical Environment in Convective Conditions
(American Meteorological Society, 2015)he turbulent data over a tropical region are utilized to analyze the observational behavior of the drag coefficient with respect to wind speed U and the stability parameter in convective conditions. The drag coefficient ... -
Extended Simulation of Tropical Cyclone Formation in the Western North Pacific Monsoon Trough
(American Meteorological Society, 2015)revious studies suggest that the low-frequency background makes an important contribution to the predictability of tropical cyclone (TC) activity on the intraseasonal time scale by providing large-scale conditions favorable ...