Recently added articles from Journal of the Atmospheric Sciences:
Sensitivity of a Cloud-Resolving Model to Bulk and Explicit Bin Microphysical Schemes. Part I: Comparisons
Jan 01, 2009; ... ABSTRACT A two-dimensional cloud-resolving model is used to study the sensitivities of two microphysical schemes, a bulk scheme and an explicit spectral bin scheme, in simulating a midlatitude summertime squall line [Preliminary Regional Experiment for Storm-Scale Operational and ...
Sensitivity of a Cloud-Resolving Model to Bulk and Explicit Bin Microphysical Schemes. Part II: Cloud Microphysics and Storm Dynamics Interactions
Jan 01, 2009; ... ABSTRACT Part I of this paper compares two simulations, one using a bulk and the other a detailed bin microphysical scheme, of a long-lasting, continental mesoscale convective system with leading convection and trailing stratiform region. Diagnostic studies and sensitivity tests are ...
An Indirect Effect of Ice Nuclei on Atmospheric Radiation
Jan 01, 2009; ... ABSTRACT A three-dimensional cloud-resolving model (CRM) with observed large-scale forcing is used to study how ice nuclei (IN) affect the net radiative flux at the top of the atmosphere (TOA). In all the numerical experiments carried out, the cloud ice content in the upper troposphere ...
The Role of Radiation in Influencing Tropical Cloud Distributions in a Radiative-Convective Equilibrium Cloud-Resolving Model
Jan 01, 2009; ... ABSTRACT Observations by Johnson et al. depict regions of active tropical convection as possessing increased relative humidity through a deep layer and reduced low-level static stability when compared to nonconvecting regions. Shallow cumulus clouds, congestus clouds, and deep convection ...
Radiative Constraints on the Hydrological Cycle in an Idealized Radiative-Convective Equilibrium Model
Jan 01, 2009; ... ABSTRACT The radiative constraints on the partitioning of the surface energy budget and, hence, on the strength of the hydrological cycle are analyzed in an idealized one-dimensional radiative-convective equilibrium model formulated in terms of the energy budgets at the top of the ...
A Simple Stochastic Model for Generating Broken Cloud Optical Depth and Cloud-Top Height Fields
Jan 01, 2009; ... ABSTRACT A simple and fast algorithm for generating two correlated stochastic two-dimensional (2D) cloud fields is described. The algorithm is illustrated with two broken cumulus cloud fields: cloud optical depth and cloud-top height retrieved from the Moderate Resolution Imaging ...
Shepard and Hardy Multiquadric Interpolation Methods for Multicomponent Aerosol-Cloud Parameterization
Jan 01, 2009; ... ABSTRACT This paper presents a novel method based on the application of interpolation techniques to the multicomponent aerosol-cloud parameterization for global climate modeling. Quantifying the aerosol indirect effect still remains a difficult task, and thus developing parameterizations ...
Diminutive Frontal Waves-A Link between Fronts and Cyclones
Jan 01, 2009; ... ABSTRACT A number of recent publications have dealt with cyclone identification and tracking. Following on, this paper extends the typical cyclone life cycle back in time to embrace a new feature called a "diminutive frontal wave." One aim is to improve predictability by extending ...
The Influence of Near-Surface, High-Entropy Air in Hurricane Eyes on Maximum Hurricane Intensity
Jan 01, 2009; ... ABSTRACT Using a time-dependent axisymmetric numerical model, the authors evaluate whether high-entropy air near the surface in hurricane eyes can substantially increase hurricanes' maximum intensity. This local high-entropy anomaly is ultimately created by surface entropy fluxes in the ...
Internal Control of Hurricane Intensity Variability: The Dual Nature of Potential Vorticity Mixing
Jan 01, 2009; ... ABSTRACT In hurricane eyewalls, the vertical stretching effect tends to produce an annular ring of high vorticity. Idealized, unforced nondivergent barotropic model results have suggested such rings of vorticity are often barotropically unstable, leading to strong asymmetric mixing ...
Scale Analysis for Large-Scale Tropical Atmospheric Dynamics
Jan 01, 2009; ... ABSTRACT A systematic scale analysis is performed for large-scale dynamics over the tropics. It is identified that two regimes are competing: 1) a dynamics characterized by balance between the vertical advection term and diabatic heating in the thermodynamic equation, realized at ...
Error Growth in a Whole Atmosphere Climate Model
Jan 01, 2009; ... ABSTRACT It has been well established that the atmosphere is chaotic by nature and thus has a finite limit of predictability. The chaotic divergence of initial conditions and the predictability are explored here in the context of the whole atmosphere (from the ground to the thermosphere) ...
Characterization of the Martian Surface Layer
Jan 01, 2009; ... ABSTRACT The authors have estimated the diurnal evolution of Monin-Obukhov length, friction velocity, temperature scale, surface heat flux, eddy-transfer coefficients for momentum and heat, and turbulent viscous dissipation rate on the Martian surface layer for a complete sol belonging ...
Composite Life Cycle of Maritime Tropical Mesoscale Convective Systems in Scatterometer and Microwave Satellite Observations
Jan 01, 2009; ... ABSTRACT This study examines scatterometer-observed surface wind divergence and vorticity, along with precipitable water (PW), across the life cycle of tropical maritime mesoscale convective systems (MCSs) as resolved in 0.5° data. Simple composites were constructed around first ...
CORRIGENDUM
Jan 01, 2009; ... The last four references in the reference section of "Morphology of Tropical Upwelling in the Lower Stratosphere," by Marvin A. Geller, Tiehan Zhou, and Kevin Hamilton, which was published in the July 2008 issue of the Journal of the Atmospheric Sciences, contained errors. The corrected ...
Wavelet Analysis of the Convectively Coupled Equatorial Waves in the Wavenumber-Frequency Domain
Jan 01, 2009; ... ABSTRACT Wavelet analysis is performed on 31 yr (1975-2007, except 1978 and 1979) of daily outgoing longwave radiation data in the global equatorial region (15°S-15°N). Power spectra in the zonal wavenumber-frequency domain are obtained. With different scales and bandwidths than in ...
CORRIGENDUM
Jan 01, 2009; ... (ProQuest: ... denotes formulae omitted.) Two press errors appeared in "Barotropic Regeneration of Upper-Level Synoptic Disturbances in Different Configurations of the Zonal Weather Regime," by Gwendal Rivière, which was published in the Journal of the Atmospheric Sciences, Vol. 65, No ....
Giant Sea-Salt Aerosols and Warm Rain Formation in Marine Stratocumulus
Dec 01, 2008; ... ABSTRACT The concentrations and sizes of smaller aerosols (radius smaller than 0.5 µm) in the marine atmosphere vary owing to natural and anthropogenic factors. The concentrations and sizes of giant and ultragiant aerosols vary primarily due to wind-speed-dependent wave breaking. In ...
Diagnostic Analysis of Tidal Winds and the Eliassen-Palm Flux Divergence in the Mesosphere and Lower Thermosphere from TIMED/SABER Temperatures
Dec 01, 2008; ... ABSTRACT For migrating tides or fast-moving planetary waves, polarization relations derived from the linear wave equations are required to accurately derive the wind components from the temperature field. A common problem in diagnosing winds from the measured temperature is the error ...
Fast Lidar and Radar Multiple-Scattering Models. Part I: Small-Angle Scattering Using the Photon Variance-Covariance Method
Dec 01, 2008; ... ABSTRACT A fast, approximate method is described for the calculation of the intensity of multiply scattered lidar returns from clouds. At each range gate it characterizes the outgoing photon distribution by its spatial variance, the variance of photon direction, and the covariance of ...