Results 161 to 170 of about 731 (204)

Theory of Extratropical Cyclones

1990
There is no unique framework for understanding the growth and decay of extratropical cyclones. A number of useful approaches have been pursued in the huge body of literature on the subject during the past fifty years; these are reviewed also by Reed in Chapter 3 of this volume. Studies of the energetics or angular momentum budgets for a box surrounding
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Extratropical cyclones An historical perspective

2002
Abstract The history of ideas concerning extratropical cyclones has been intimately intertwined with that of meteorology itself. In this chapter, aspects of this history will be brought out with particular reference to the points in that history where the thinking has been influenced by, and has influenced, fundamental mathematics and physics.
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The Extratropical Transition of Tropical Cyclones

2003
Abstract : To improve tropical cyclone structure and intensity prediction through a research program combining high-resolution modeling and detailed observational studies to investigate physical processes by which the structure and intensity of a tropical cyclone are modified.
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On the relation of the number of extratropical cyclones to their sizes

Izvestiya, Atmospheric and Oceanic Physics, 2008
Extratropical cyclones were identified on the basis of sea level pressure NCEP/NCAR reanalysis data for the Northern Hemisphere from 1948 to 2004. Cyclone positions were determined with a time interval of 6 h. Cyclone sizes were obtained with the use of a numerical scheme based on a rotation of the spherical coordinate system such that the pole of the ...
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Can Extratropical Cyclones Increase Baroclinicty? A Pathway to Cyclone Clustering

2020
<p>The existence of cyclone clustering, the succession of multiple cyclones in a short amount of time, indicates that the baroclinicity feeding these storms undergoes episodic cycles. With the generally accepted paradigm of baroclinic instability for extratropical cyclones, one would anticipate that clustering coincides with ...
Chris Weijenborg, Thomas Spengler
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The Life Cycles of Extratropical Cyclones

1999
This monograph contains expanded versions of the invited papers presented at the International Symposium on the Life Cycles of Extratropical Cyclones, held in Bergen, Norway, 27 June-1 July 1994. The symposium coincided with the 75th anniversary of the introduction of Jack Bjerknes's frontal-cyclone model presented in his seminal article "On the ...
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Boundary layer mechanisms in extratropical cyclones

Quarterly Journal of the Royal Meteorological Society, 2007
AbstractThis paper revisits the mechanism for the interaction of the boundary layer with extratropical cyclones. Two diagnostic approaches are compared: Ekman pumping and potential vorticity. Ekman pumping derives from the boundary layer stress which induces convergence and ascent.
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Mesoscale precipitation patterns in extratropical cyclones and implications for cyclone development

Journal of Geophysical Research: Atmospheres, 1990
Analysis of the surface distribution of precipitation associated with intense extratropical cyclones reveals elongated maxima aligned with the steering flow. Rapidly intensifying cyclones create precipitation maxima which are better defined and contain more moisture than weaker cyclones.
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Vorticity Equation Terms for Extratropical Cyclones

Monthly Weather Review, 1996
Abstract All terms of the frictionless, nonlinear, vorticity equation are examined. Traditional scale analysis provides one of several justifications for using the quasigeostrophic (QG) system of equations to model extratropical cyclones. Analysts of observations have long known that some of the other terms (non-QG) are individually comparable to terms
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Improved Representation of Extratropical Cyclone Structure in HighResMIP Models

Geophysical Research Letters, 2022
Matthew D K Priestley, Jennifer L Catto
exaly