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Block

 
Artist: Sandy Block
  • Genres: Jazz
  • Instrument: Bass

Biography

As Sandy Block, this bassist's name sounds like something that might be lying around in a workshop, or a description of the neighborhood near a beach. He also has been credited frequently as Sid Block in a performance and recording career that began in the prosperous big band jazz days of the '30s and '40s and continued through the '50s and '60s folkie scene. He began studying violin as a boy, his family having moved from Cleveland to Brooklyn. By high school he had worked his way down to bass and in the late '30s began working in various large groups under the leadership of Van Alexander, Alvino Rey and Tommy Dorsey, among others. The latter leader provides some of the larger pillars in a discography that also includes potentially architectural accumulations of sides by Louis Armstrong and a somewhat smaller collection of appearances backing Ella Fitzgerald. Notable bebop trivia: Block was the bassist who backed Charlie Parker's only appearance on television.

Block's survival strategy during the rock and roll era was two-pronged. He stayed loyal to the spirit of classic jazz, playing with vigor and no lack of sentimentality in combos led by Jimmy McPartland, for example. He also did more than just poke his nose into recording studios, making himself available as bassist for folk groups such as the Greenbriar Boys. One of the simplest and best recordings featuring this bassist is Piano Solos, a collaboration with pianist Johnny Costa, the same man who provided keyboard music on the Mr. Rogers kiddie show for many years. Block seems to have left the fulltime music neighborhood in the late '60s. ~ Eugene Chadbourne, All Music Guide
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Wikipedia: Block (meteorology)
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An example of an omega block over western North America in May 2006

Blocks in meteorology are large scale patterns in the atmospheric pressure field that are nearly stationary, effectively "blocking" or redirecting migratory cyclones. They are also known as blocking highs or blocking anticyclones.[1] These blocks can remain in place for several days or even weeks, causing the areas affected by them to have the same kind of weather for an extended period of time (e.g.- precipitation for some areas, clear skies for others).[2] In the Northern Hemisphere, extended blocking occurs most frequently in the spring over the eastern Pacific and Atlantic oceans. [1]

Contents

Omega blocks

Omega blocks are so-named because the height fields associated with them resemble an Ω, the uppercase Greek letter omega. The typical pattern for this is low-high-low, arranged in the west-east direction.[2]

Rex blocks

An example of a rex block off the coast of North America in January 2007

Rex blocks consist of a high situated to the north of a low. Very often both the high and the low are closed, meaning that the isobars (or constant geopotential height lines) defining the high/low close to form a circle.[3] Rex blocks are not so-named because they are considered the "king of blocks" (see Rex), although the depiction of air flow around rex blocks on upper-air charts often resembles the mouth of a tyrannosaurus rex. Rather they were named after the meteorologist who first identified them.[4]

Cut off Highs and Lows

When an upper level high or low pressure system becomes stuck in place due to a lack of steering currents, it is known as being "cut off". The usual pattern which leads to this is the jet stream retreats to the north, leaving the then cut off system behind.[5] Whether or not the system is of high or low pressure variety dictates the weather that the block causes. Precisely this situation occurred over the southwestern United States in late spring and early summer of 2007, when a cut off low system hovering over the region brought unusually cool temperatures and an extraordinary amount of rain to Texas and Oklahoma (see June 2007 Texas flooding).

If the block is a high, it will usually lead to dry, warm weather as the air beneath it is compressed and warmed; and rainy, cooler weather if the block is a low.[5]

See also

References

  1. ^ a b Glossary of Meteorology, Second Edition; American Meteorlogical Society, 2000; ISBN 1-878220-34-9.
  2. ^ a b Brief page about Omega blocks
  3. ^ Brief page about Rex blocks
  4. ^ Another Rex Block page
  5. ^ a b Atmospheric Blocking

 
 

 

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Artist. Copyright © 2009 All Media Guide, LLC. Content provided by All Music Guide ®, a trademark of All Media Guide, LLC. All rights reserved.  Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Block (meteorology)" Read more