| THE GATE SQUALL LINE OF 9－10 AUGUST 1974 |
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| 作者姓名： | Wei Tongjian Robert A. Houze Jr. |
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| 摘 要： | A tropical squall line that passed over the ship array of the Global Atmospheric Research Programme’s Atlantic Tropical Experiment (GATE) on 9－10 August 1974 is analyzed. This squall line was similar to squall systems that passed over the GATE ship array on four other days. It began as a purely convective cloud line, then developed an associated stratiform cloud and precipitation area. The stratiform rain built up to a maxi-mum amount over a period of 8 h, then gradually diminished over a 6 h period. This stratiform rain is esti-mated to have accounted for 32% of the squall system’s total precipitation. As in other GATE squall lines, the upper-level cloud shield from which the stratiform rain fell, was advected slowly forward of the line during the system’s lifetime, the leading line of corrective clouds consisted of transient smaller-scale convective elements, which lent the line an irregular shape and pulsatory movement, and the stratiform portion of the system was characterized by the development of a mid-level mesoscale vortex similar to that seen in other GATE eases.
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| 收稿时间： | 1 April 1986 |
The GATE squall line of 9-10 August 1974 |
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| Wei Tongjian,Robert A. Houze,Jr..The GATE squall line of 9-10 August 1974[J].Advances in Atmospheric Sciences,1987,4(1):85-92. |
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| Authors: | Wei Tongjian and Robert A Houze Jr |
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| Institution: | (1) Department of Atmospheric Sciences, Nanjing University, Nanjing;(2) Department of Atmospheric Sciences, University of Washington, 98195 Seattle, WA, USA |
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| Abstract: | A tropical squall line that passed over the ship array of the Global Atmospheric Research Programme's Atlantic Tropical Experiment
(GATE) on 9-10 August 1974 is analyzed. This squall line was similar to squall systems that passed over the GATE ship array
on four other days. It began as a purely convective cloud line, then developed an associated stratiform cloud and precipitation
area. The stratiform rain built up to a maximum amount over a period of 8 h, then gradually diminished over a 6 h period.
This stratiform rain is estimated to have accounted for 32% of the squall system's total precipitation. As in other GATE squall
lines, the upper-level cloud shield from which the stratiform rain fell, was advected slowly forward of the line during the
system's lifetime, the leading line of convective clouds consisted of transient smaller-scale convective elements, which lent
the line an irregular shape and pulsatory movement, and the stratiform portion of the system was characterized by the development
of a mid-level mesoscale vortex similar to that seen in other GATE cases. |
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