Journal of the Atmospheric Sciences: Recent submissions

Now showing items 4541-4560 of 13215

    • Baroclinic Instability of a Zero-PVE Jet: Enhanced Effects of Moisture on the Life Cycle of Midlatitude Cyclones 

      Fantini, Maurizio (American Meteorological Society, 2004)
      Numerical experiments that compare the life cycles of baroclinic cyclones in either a dry or a saturated atmosphere in Cartesian geometry are performed starting from a jetlike mean initial state designed to maximize the ...

    • Ocean Effects on Tropical Cyclone Intensification and Inner-Core Asymmetries 

      Zhu, Hongyan; Ulrich, Wolfgang; Smith, Roger K. (American Meteorological Society, 2004)
      The interaction between a tropical cyclone and the ocean is investigated using a minimal three-dimensional tropical cyclone model coupled with a two-layer ocean model. Two representations for entrainment into the ocean ...

    • The Tropopause and the Thermal Stratification in the Extratropics of a Dry Atmosphere 

      Schneider, Tapio (American Meteorological Society, 2004)
      A dynamical constraint on the extratropical tropopause height and thermal stratification is derived by considerations of entropy fluxes, or isentropic mass fluxes, and their different magnitudes in the troposphere and ...

    • Mountain Torques and Northern Hemisphere Low-Frequency Variability.Part II: Regional Aspects 

      Lott, François; Robertson, Andrew W.; Ghil, Michael (American Meteorological Society, 2004)
      Important aspects of low-frequency variability (LFV) are regional in character, while the mountain torques of the Rockies and the Himalayas evolve quite independently of each other. The hemispheric analysis of Part I is ...

    • Buoyancy Flux Modeling for Cloudy Boundary Layers 

      Lewellen, D. C.; Lewellen, W. S. (American Meteorological Society, 2004)
      The modeling of the buoyancy flux in a partly cloudy atmospheric boundary layer is complicated by its dependence on the correlation between clouds and vertical velocity elements, which can vary significantly with the ...

    • Physical Origin of a Wet Microburst: Observations and Theory 

      Atlas, David; Ulbrich, Carlton W.; Williams, Christopher R. (American Meteorological Society, 2004)
      A unique set of Doppler and polarimetric radar observations were made of a microburst-producing storm in Amazonia during the Tropical Rainfall Measuring Mission (TRMM) Large-Scale Biosphere?Atmosphere (LBA) field experiment. ...

    • A Method for Unbiased High-Resolution Aerosol Retrieval from Landsat 

      Lyapustin, Alexei; Williams, D. L.; Markham, B.; Irons, J.; Holben, B.; Wang, Y. (American Meteorological Society, 2004)
      Because the land surface reflectance varies spatially, the atmospheric radiative transfer over land in clear-sky conditions is essentially three-dimensional. This is manifested through horizontal radiative fluxes that blur ...

    • Boundary Layer Dynamics and Cross-Equatorial Hadley Circulation 

      Pauluis, Olivier (American Meteorological Society, 2004)
      The behavior of the Hadley circulation is analyzed in the context of an idealized axisymmetric atmosphere. It is argued that the cross-equatorial Hadley circulation exhibits two different regimes depending on the depth of ...

    • Vacillations in a Shallow-Water Model of the Stratosphere 

      Rong, Ping-Ping; Waugh, Darryn W. (American Meteorological Society, 2004)
      The evolution of the polar vortex in a shallow-water model with time-independent topographic forcing and relaxation to a constant equilibrium state is investigated for a range of topographic forcing amplitudes. For small ...

    • The Role of “Vortical” Hot Towers in the Formation of Tropical Cyclone Diana (1984) 

      Hendricks, Eric A.; Montgomery, Michael T.; Davis, Christopher A. (American Meteorological Society, 2004)
      A high-resolution (3-km horizontal grid spacing) near-cloud-resolving numerical simulation of the formation of Hurricane Diana (1984) is used to examine the contribution of deep convective processes to tropical cyclone ...

    • Comments on “An Improved Model for the Turbulent PBL” 

      Hassid, S.; Galperin, B. (American Meteorological Society, 2004)

    • Reply 

      Cheng, Y.; Canuto, V. M.; Howard, A. M. (American Meteorological Society, 2004)

    • Isentropic Cross-Tropopause Ozone Transport in the Northern Hemisphere 

      Jing, P.; Cunnold, D. M.; Wang, H. J.; Yang, E-S. (American Meteorological Society, 2004)
      This paper investigates isentropic ozone exchange between the extratropical lower stratosphere and the subtropical upper troposphere in the Northern Hemisphere. The quantification method is based on the potential vorticity ...

    • A Case Study of the Development of Contrail Clusters over the Great Lakes 

      Duda, David P.; Minnis, Patrick; Nguyen, Louis; Palikonda, Rabindra (American Meteorological Society, 2004)
      Widespread persistent contrails over the western Great Lakes during 9 October 2000 were examined using commercial flight data, coincident meteorological data, and satellite remote sensing data from several platforms. The ...

    • A Statistical Description of Small-Scale Turbulence in the Low-Level Nocturnal Jet 

      Frehlich, Rod; Meillier, Yannick; Jensen, Michael L.; Balsley, Ben (American Meteorological Society, 2004)
      The probability density function (PDF) and spatial statistics of both the energy dissipation rate ? and the temperature structure constant C2T are determined for the shear region of a nocturnal jet. The PDF of ? and C2T ...

    • A Microphysical Interpretation of Radar Reflectivity–Rain Rate Relationships 

      Steiner, Matthias; Smith, James A.; Uijlenhoet, Remko (American Meteorological Society, 2004)
      The microphysical aspects of the relationship between radar reflectivity Z and rainfall rate R are examined. Various concepts discussed in the literature are integrated into a coherent analytical framework and discussed ...

    • The Necessity of Instantaneous Optimals in Stationary Turbulence 

      DelSole, Timothy (American Meteorological Society, 2004)
      An optimal perturbation is an initial condition that optimizes some measure of amplitude growth over a prescribed time in a linear system. Previous studies have argued that optimal perturbations play an important role in ...

    • The Wave–Zonal Mean Flow Interaction in the Southern Hemisphere 

      Kim, Hyun-kyung; Lee, Sukyoung (American Meteorological Society, 2004)
      This study examines the wave?zonal mean flow interaction in the Southern Hemisphere (SH) and in an SH- like model atmosphere. During the SH winter, when there exist both subtropical and polar front jets, growing baroclinic ...

    • A Multiple Mass Flux Parameterization for the Surface-Generated Convection. Part II: Cloudy Cores 

      Cheinet, Sylvain (American Meteorological Society, 2004)
      The multiple mass-flux approach introduced in a companion paper aims at parameterizing the surface-generated convection in the atmosphere. The original aspects of this model are as follows. A number of convective updrafts ...

    • An Analytical Model of Mountain Wave Drag for Wind Profiles withShear and Curvature 

      Teixeira, Miguel A. C.; Miranda, Pedro M. A.; Valente, Maria Antónia (American Meteorological Society, 2004)
      An analytical model is developed to predict the surface drag exerted by internal gravity waves on an isolated axisymmetric mountain over which there is a stratified flow with a velocity profile that varies relatively slowly ...