Results 131 to 140 of about 302 (178)
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On the Generation of African Squall Lines
Journal of Climate, 1993Abstract Squall lines (SLs) form an important component of the meteorology of northern Africa, and in particular, contribute substantially to rainfall totals. Their generation requires the existence of a potentially unstable low-level supply of moisture overlain by dry desert air and vertical wind shear beneath the midlevel African easterly jet.
David P. Rowell, James R. Milford
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The Journal of the Royal Aeronautical Society, 1927
The subject of “Line-squalls” is one which has not been entirely neglected in the proceedings of this Society, but it has not hitherto been treated in any degree of detail. Sir Napier Shaw, in a lecture delivered on January 7th, 1914, on the subject of “Wind Gusts and the Structure of Aerial Disturbances,” briefly cited the line-squall as a phenomenon ...
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The subject of “Line-squalls” is one which has not been entirely neglected in the proceedings of this Society, but it has not hitherto been treated in any degree of detail. Sir Napier Shaw, in a lecture delivered on January 7th, 1914, on the subject of “Wind Gusts and the Structure of Aerial Disturbances,” briefly cited the line-squall as a phenomenon ...
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Squall line sensitivity in LES simulations
2022<p>Upper tropospheric (UT) divergence is potentially an important mediator between convective scale error growth and advective/non-linear large scale error growth at jet stream scales (Baumgart et al. 2019). To investigate possible mechanistic links of error growth from small convective scales to the synoptic scales, but also to gain ...
Edward Groot, Holger Tost
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Bulletin of the American Meteorological Society, 1955
Are the outer precipitation bands of hurricanes and typhoons important phenomena? In suggesting that the answer to this question is “yes” several features of these bands are described or postulated. Methods of estimating the severity of attendant weather conditions by radar observation are offered.
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Are the outer precipitation bands of hurricanes and typhoons important phenomena? In suggesting that the answer to this question is “yes” several features of these bands are described or postulated. Methods of estimating the severity of attendant weather conditions by radar observation are offered.
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Quarterly Journal of the Royal Meteorological Society, 1977
AbstractA study of convection as portrayed by Oceanographer radar during phase III of GATE reveals four occasions on which an organized line of convection moved with a speed close to or greater than the wind speed at any level. They are shown to resemble closely the analytical model and numerical simulation of tropical line squalls developed by ...
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AbstractA study of convection as portrayed by Oceanographer radar during phase III of GATE reveals four occasions on which an organized line of convection moved with a speed close to or greater than the wind speed at any level. They are shown to resemble closely the analytical model and numerical simulation of tropical line squalls developed by ...
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A simplified squall-line model revisited
Quarterly Journal of the Royal Meteorological Society, 2000AbstractWe revisit the parametrized moisture model of Garner and Thorpe and show it does indeed support realistic multicellular behaviour when an adequate (and commonly available) amount of instability is present in the initial environment. We also consider the dramatic impact that the simplified model's storms have on their upstream environments, and ...
ROBERT G FOVELL, PEI-HUA TAN
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Extratropical Squall Lines and Rainbands
1986Squall lines and rainbands occur over both tropical and extratropical areas of the Earth in both oceanic and land areas. They affect society in major ways because of their wide geographical range and frequency of occurrence and because they typically contain high rainfall rates.
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THE MERIDIONAL GROWTH OF SQUALL LINES
Journal of Meteorology, 1954Abstract Squall lines that form ahead of an accelerating cold front are sometimes observed to grow in length. In this paper an attempt is made to explain this interesting property of squall lines, and to deduce a mathematical formula by which this growth may be forecasted.
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Balanced Atmospheric Response to Squall Lines
Journal of the Atmospheric Sciences, 1989Abstract When a Squall line propagates through the atmosphere, it not only excite transient gravity–inertia wave motion but also produces more permanent modifications to the large-scale balanced flow. Here we calculate this balanced response using the is isentropic/geostrophic coordinate version of semigeostrophic theory.
Wayne H. Schubert +2 more
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A NUMERICAL EXPERIMENT OF SQUALL-LINE FORMATION
Journal of Meteorology, 1959Abstract The formation of a prefrontal squall line is studied, based on a numerical method of solving the modified equation of motion, continuity (mass and moisture content), and thermodynamics simultaneously. Due to the limited capacity of the electronic computer used (IBM 650), computations in this experiment are necessarily simplified, and this ...
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