Hodograph Variability within Analytically Modeled, Synoptic-Scale, Baroclinic Systems

Banacos, Peter C.; Bluestein, Howard B.
June 2004
Monthly Weather Review;Jun2004, Vol. 132 Issue 6, p1448
Academic Journal
Although the relationship between the behavior of convective storms and their environmental vertical wind shear has been examined using proximity soundings and idealized numerical modeling experiments, the manner in which the vertical shear profiles, as visualized by hodographs, is regulated by the larger-scale baroclinic wave structure has not been considered in detail. To examine this synoptic-scale dependence, a relatively simple, analytic model for baroclinic systems in midlatitudes having exact solutions for a frictionless, quasigeostrophic atmosphere is employed. The analytical model consists of a checkerboard of high and low pressure areas at 1000 mb, hydrostatically modulated above by a mean meridional temperature gradient and a checkerboard of warm and cold centers at 1000 mb. Aloft, the model atmosphere consists of a zonally oriented wave train. This approach allows a systematic examination of the dependence of hodographs on the following five synoptic-scale parameters included in the model: 1) mean meridional temperature gradient, 2) system wavelength, 3) phase lag between the height and temperature fields at 1000 mb, 4) magnitude of the temperature perturbation associated with the checkerboard of warm and cold centers at 1000 mb, and 5) magnitude of the 1000-mb height perturbation. It is seen that the phase lag between the height and temperature fields and the system wavelength have the greatest quantitative influence on the relative contribution of the ageostrophic wind component to the total wind. These two parameters are associated with significant clockwise curvature with height in the hodograph of the total wind, particularly if the deep-layer ageostrophic wind shear is oriented perpendicular and to the right of the geostrophic shear. Hodograph curvature, however, is not ubiquitous in the model, and despite the model's simplicity, likely speaks to the importance of features departing from the model, mesoscale variability, and boundary layer friction in enhancing hodograph curvature.


Related Articles

  • Research backs soil test recommendations. Hollis, Paul L. // Southeast Farm Press;11/19/2003, Vol. 30 Issue 26, p1 

    Presents information on the full fertility experiment which began in north Alabama's Tennessee Valley Research and Extension Center in 1928. Reason why the north Alabama experiment is called a two-year rotation; Benefits of the N-P-K test to researchers; Importance of long-term trials.

  • Testing equivalence between two laboratories or two methods using paired-sample analysis and interval hypothesis testing. Shixia Feng; Qiwei Liang; Kinser, Robin D.; Newland, Kirk; Guilbaud, Rudolf // Analytical & Bioanalytical Chemistry;Aug2006, Vol. 385 Issue 5, p975 

    A modified interval hypothesis testing procedure based on paired-sample analysis is described, as well as its application in testing equivalence between two bioanalytical laboratories or two methods. This testing procedure has the advantage of reducing the risk of wrongly concluding equivalence...

  • HyShot Search Goes On. Luntz, Stephen // Australasian Science;Jun2003, Vol. 24 Issue 5, p4 

    Focuses on the HyShot scramjet experiments in Australia. Details of the experiment; Information on scramjet combustion engines; Questions which the research team aims to answer.

  • K-12 Teachers Grant: Polymers to the Rescue.  // Advanced Materials & Processes;Oct2005, Vol. 163 Issue 10, p96 

    Reports on the development of a non-slip product to enhance the safety and performance of walkers, canes and crutches by students at Slauson Middle School in California.

  • Características del perfil de los investigadores categorizados por el Consejo Nacional de Ciencia y Tecnología del Paraguay. Jiménez Chaves, Viviana Elizabeth; Duarte Masi, Sergio // Revista Internacional de Investigación en Ciencias Sociales;dic2013, Vol. 9 Issue 2, p221 

    This research presents a study on the characteristics of the profile of the researchers categorized in the National advice of Science and Technology (CONACYT) of Paraguay. It has done work with Incentive Program (PRONII) of CONACYT researchers in the year 2011. The aim of this study to...

  • Science-Project Success Guide.  // Science World (Teacher's Edition);9/20/1999, Vol. 56 Issue 2, pTE2 

    Presents a guideline for designing and conducting scientific experiments.

  • How'd It Do That? Lynn, Diana // Boys' Life;Jun99, Vol. 89 Issue 6, p40 

    Explains several scientific experiments and results.

  • unbalanced experimental design:. Schlegel, Rolf H. J. // Encyclopedic Dictionary of Plant Breeding & Related Subjects;2003, p423 

    An encyclopedia entry for the term "unbalanced experimental design" is presented, which refers to an experiment or set of data in which all treatments or treatment combinations are not equally represented.

  • Solid-state experimentalists: Theory should be on tap, not on top. Anderson, Philip W. // Physics Today;Sep90, Vol. 43 Issue 9, p9 

    Argues for a rule against including theory and experiment in the same scientific paper and how it affects solid-state physics. Incorrect interpretations; Examples of experiments without theoretical interpretation; Superconductivity field; Tunneling studies; Burden of undue scientific theory;...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics