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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
1999This 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, 2007AbstractThis 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, 1990Analysis 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, 1996Abstract 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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Organization of Clouds and Precipitation in Extratropical Cyclones
1990A number of models accounting for the distribution of cloud and precipitation in extratropical cyclones were proposed during the 19th and early 20th centuries. A history of these has been recounted by Bergeron (1959, abridged version in Bergeron 1981) and also by Ludlam (1966) in his inaugural lecture as professor of meteorology.
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Cyclone phase space diagrams dedicated to extratropical cyclones studies
Cyclones’ tracking algorithms are commonly used to study the life cycle of extratropical cyclones and their evolution with climate change in both reanalyses and climate models. Such a framework allows the computation of valuable diagnostics such as maps of genesis, lysis, and track densities, statistical analyses or also centered-cyclone composites ...Myriam Besson +2 more
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