THE GATE SQUALL LINE OF 9－10 AUGUST 1974

Wei Tongjian; Robert A. Houze; Jr.

doi:10.1007/BF02656664

Impact Factor: 5.8

Volume 4 Issue 1

Jan. 1987

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Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1987 > 4(1): 85-92

THE GATE SQUALL LINE OF 9－10 AUGUST 1974

1.
Department of Atmospheric Sciences, Nanjing University, Nanjing,Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195, U.S.A.

doi: 10.1007/BF02656664

Abstract
References
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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 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.
References

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Manuscript History

Manuscript received: 10 January 1987

Manuscript revised: 10 January 1987

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

THE GATE SQUALL LINE OF 9－10 AUGUST 1974

1. Department of Atmospheric Sciences, Nanjing University, Nanjing,Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195, U.S.A.

Manuscript received: 1987-01-10
Manuscript revised: 1987-01-10

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 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.