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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, 1952
Squall lines are among the most severe but least understood weather phenomena. They are difficult to identify on the usual synoptic charts, and there has been some confusion concerning the definition of the terms “squall line” and “instability line.” The primary purpose of this paper is to show that squall lines can be defined and identified by the ...
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Squall lines are among the most severe but least understood weather phenomena. They are difficult to identify on the usual synoptic charts, and there has been some confusion concerning the definition of the terms “squall line” and “instability line.” The primary purpose of this paper is to show that squall lines can be defined and identified by the ...
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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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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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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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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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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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Initiation of West African squall lines
Meteorology and Atmospheric Physics, 1989It is proposed that squall lines are initiated through the growth (with time) of wave-like perturbations along the surface of discontinuity between the monsoon southwesterlies and the dry northeasterlies in West Africa. Out of the many possible modes of different growth rates, the modes with the largest amplification could block the 650-mb mid ...
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Investigating extreme precipitation in tropical squall lines
2022<p>Squall lines are the consequence of the interaction of low-level shear with cold pools associated with convective downdrafts, and beyond a critical shear, squall lines tend to orient themselves. It has been shown that this orientation has the effect of reducing the incoming wind shear to the squall line and maintains equilibrium ...
Sophie Abramian +2 more
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