Journal of the Atmospheric Sciences: Recent submissions

Now showing items 4061-4080 of 13215

    • Mechanisms for Quasi-Stationary Behavior in Simulated Heavy-Rain-Producing Convective Systems 

      Schumacher, Russ S. (American Meteorological Society, 2009)
      In this study, idealized numerical simulations are used to identify the processes responsible for initiating, organizing, and maintaining quasi-stationary convective systems that produce locally extreme rainfall amounts. ...

    • Nonstationary Synchronization of Equatorial QBO with SAO in Observations and a Model 

      Kuai, Le; Shia, Run-Lie; Jiang, Xun; Tung, Ka-Kit; Yung, Yuk L. (American Meteorological Society, 2009)
      It has often been suggested that the period of the quasi-biennial oscillation (QBO) has a tendency to synchronize with the semiannual oscillation (SAO). Apparently the synchronization is better the higher up the observation ...

    • Cloud Droplet Growth by Condensation in Homogeneous Isotropic Turbulence 

      Lanotte, Alessandra S.; Seminara, Agnese; Toschi, Federico (American Meteorological Society, 2009)
      The growth of cloud droplets by diffusion of water vapor in a three-dimensional homogeneous isotropic turbulent flow is considered. Within a simple model of advection and condensation, the dynamics and growth of millions ...

    • A Coupled GCM Analysis of MJO Activity at the Onset of El Niño 

      Marshall, A. G.; Alves, O.; Hendon, H. H. (American Meteorological Society, 2009)
      The ocean dynamics of the Madden?Julian oscillation (MJO) and its interaction with El Niño?Southern Oscillation (ENSO) are assessed using a flux-corrected coupled model experiment from the Australian Bureau of Meteorology. ...

    • Alignment of Hurricane-like Vortices on f and β Planes 

      Jones, Robert W.; Willoughby, Hugh E.; Montgomery, Michael T. (American Meteorological Society, 2009)
      A nonlinear, two-layer, vortex-tracking semispectral model (i.e., Fourier transformed in azimuth only) is used to study the evolution of dry, but otherwise hurricane-like, initially tilted vortices in quiescent surroundings ...

    • Wavelet Analysis of the Convectively Coupled Equatorial Waves in the Wavenumber–Frequency Domain 

      Wong, Martin L. M. (American Meteorological Society, 2009)
      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 ...

    • Controls on the Activation and Strength of a High-Latitude Convective Cloud Feedback 

      Abbot, Dorian S.; Tziperman, Eli (American Meteorological Society, 2009)
      Previous work has shown that a convective cloud feedback can greatly increase high-latitude surface temperature upon the removal of sea ice and can keep sea ice from forming throughout polar night. This feedback activates ...

    • CORRIGENDUM 

      Kuang, Zhiming (American Meteorological Society, 2008)

    • Equilibration of Baroclinic Turbulence in Primitive Equations and Quasigeostrophic Models 

      Zurita-Gotor, Pablo; Vallis, Geoffrey K. (American Meteorological Society, 2009)
      This paper investigates the equilibration of baroclinic turbulence in an idealized, primitive equation, two-level model, focusing on the relation with the phenomenology of quasigeostrophic turbulence theory. Simulations ...

    • Linear Theory Calculations for the Sea Breeze in a Background Wind: The Equatorial Case 

      Qian, Tingting; Epifanio, Craig C.; Zhang, Fuqing (American Meteorological Society, 2009)
      The equatorial coastal circulation is modeled in terms of the linear wave response to a diurnally oscillating heat source gradient in a background wind. A diurnal scaling shows that the solution depends on two parameters: ...

    • The Environment of Precipitating Shallow Cumulus Convection 

      Nuijens, Louise; Stevens, Bjorn; Siebesma, A. Pier (American Meteorological Society, 2009)
      Quantitative estimates of precipitation in a typical undisturbed trade wind region are derived from 2 months of radar reflectivity data and compared to the meteorological environment determined from soundings, surface flux, ...

    • Generation and Propagation of Inertia–Gravity Waves from Vortex Dipoles and Jets 

      Wang, Shuguang; Zhang, Fuqing; Snyder, Chris (American Meteorological Society, 2009)
      This study investigates gravity wave generation and propagation from jets within idealized vortex dipoles using a nonhydrostatic mesoscale model. Two types of initially balanced and localized jets induced by vortex dipoles ...

    • A Balanced Approximation of the One-Layer Shallow-Water Equations on a Sphere 

      Verkley, W. T. M. (American Meteorological Society, 2009)
      A global version of the equivalent barotropic vorticity equation is derived for the one-layer shallow-water equations on a sphere. The equation has the same form as the corresponding beta plane version, but with one important ...

    • Two Types of Baroclinic Life Cycles during the Southern Hemisphere Summer 

      Moon, Woosok; Feldstein, Steven B. (American Meteorological Society, 2009)
      Baroclinic eddy life cycles of the Southern Hemisphere (SH) summer are investigated with NCEP?NCAR reanalysis data. A composite analysis is performed for the years 1980 through 2004. Individual life cycles are identified ...

    • Error Growth in a Whole Atmosphere Climate Model 

      Liu, H-L.; Sassi, F.; Garcia, R. R. (American Meteorological Society, 2009)
      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 Mesoscale Kinetic Energy Spectrum of a Baroclinic Life Cycle 

      Waite, Michael L.; Snyder, Chris (American Meteorological Society, 2009)
      The atmospheric mesoscale kinetic energy spectrum is investigated through numerical simulations of an idealized baroclinic wave life cycle, from linear instability to mature nonlinear evolution and with high horizontal and ...

    • Reply 

      Errico, Ronald M.; Bauer, Peter; Mahfouf, Jean-François (American Meteorological Society, 2008)
      This is a reply to a set of criticisms regarding a previously published work. It briefly addresses the main criticisms. In particular, it explains why some papers identified as having some fundamental flaws were referenced ...

    • Life Cycles of Hurricane-Like Vorticity Rings 

      Hendricks, Eric A.; Schubert, Wayne H.; Taft, Richard K.; Wang, Huiqun; Kossin, James P. (American Meteorological Society, 2009)
      The asymmetric dynamics of potential vorticity mixing in the hurricane inner core are further advanced by examining the end states that result from the unforced evolution of hurricane-like vorticity rings in a nondivergent ...

    • The Vertical Structure of Mesoscale Convective Vortices 

      Davis, Christopher A.; Galarneau, Thomas J. (American Meteorological Society, 2009)
      Simulations of two cases of developing mesoscale convective vortices (MCVs) are examined to determine the dynamics governing the origin and vertical structure of these features. Although one case evolves in strong vertical ...

    • Storm-Relative Helicity Revealed from Polarimetric Radar Measurements 

      Kumjian, Matthew R.; Ryzhkov, Alexander V. (American Meteorological Society, 2009)
      The dual-polarization radar variables are especially sensitive to the microphysical processes of melting and size sorting of precipitation particles. In deep convective storms, polarimetric measurements of such processes ...