The role of the waves in the upper westerlies for the surface cyclones ... cular: deepening occurs ff there is enough upper air divergence vertically .... rather closely with the limit between pre-trough rising and post-trough descending motion. ... to confluent upper troughs and the associated filling cyclone. ...
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www.springerlink.com/index/714604471T7Q5384.pdf
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Surface observations and the NLDN showed that the thunderstorms produced heavy rain ... Very dry air had been advected into the upper low, but closely examining the ... This cooling can also be attributed to cold air advection associated with a .... A closed system also produces the best upper divergence over the ...
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www.wrh.noaa.gov/wrh/01TAs/0109/index.html
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The principal motivation for this study is to identify those upper-air variables most closely associated with precipitation amount for snowstorms along the east coast of the United States. ... For significant snowfall accumulations, three main physical requirements are needed: a deep subfreezing layer of air above the surface,
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ams.allenpress.com/perlserv/?doi=10.1175%2F1520-0434(20...
ams.allenpress.com/perlserv/?doi=10.1175%2F1520-0434(2000)015%3C0339%3AADOTEU%3E2.0.CO%3B2&request=get-document
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It is closely related to vertical vorticity, since it is the principal agency ... Divergence in the upper air is associated with depressions at ground level. ... vector field across the surface of a small region relative to the volume of that region. ... Most importantly, the divergence is a linear operator, i.e. ...
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www.answers.com/topic/divergence
www.answers.com/topic/divergence
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On the onshore flank of the front, surface wind divergence associated with high pressure (negative sea-level pressure Laplacian) occurs (blue shade). The distribution of the wind convergence and divergence is closely associated with surface winds across the sea-surface temperature front (short gray arrows).
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www.jamstec.go.jp/e/about/press_release/20080313/
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A reflective surface closely associated with the tubes is characterized in cross section by a repetitive sequence of compound angles defining a series of side-by-side troughs with upwardly divergent sidewalls spanned at their base by tented bottom wall segments; ... Method and apparatus for ultrasonic detection of air bubbles...
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www.patentgenius.com/patent/4344416.html
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Such a network would address the need for high-quality reference sites that provide surface-based (fixed and balloon-borne) upper-air measurements, as identified1 in the Implementation Plan for the Global Observing System for Climate in Support of the UNFCCC (GCOS-92, October 2004, hereafter called the...
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www.wmo.int/pages/prog/gcos/Publications/gcos-112.pdf
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This test was organised by the Expert Team on Upper- Air Systems Intercomparisons, ... The workload associated with data entry was increased by the large number of last moment modifications made to proposed file formats by most manufacturers in the test. ... Vaisala measurements agreed to within ± 0.3 K from the surface to 31 km.
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www.wmo.int/pages/prog/www/IMOP/meetings/Upper-Air/RSO-...
www.wmo.int/pages/prog/www/IMOP/meetings/Upper-Air/RSO-ComparisonMauritius/3(16)_UK_Nash_Vacoas.pdf
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published 30 September 2005. [1] HadAT is a new analysis of the global upper air temperature record from 1958 to; 2002 based upon radiosonde data alone. This analysis makes use of a greater number of stations than previous ... variations in one location tend to be associated with changes over much broader regions.
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hadobs.metoffice.com/hadat/HadAT_paper.pdf
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