A PV-streamer's role in a succession of heavy rain-producing MCSs over the Central United States

F. Caracena , A. Marroquin , E. Tollerud
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引用次数: 3

Abstract

A PV-streamer at 250 hPa, moving over the west central United States 25 June-5 July 1999 was visible on GOES-8 water vapor imagery as a narrow, elongated dark band. It sparked a series of mesoscale convective systems (MCSs) on successive days, producing heavy precipitation from Nebraska eastward and southeastward toward the coast along the Gulf of Mexico. The MCSs began as the PV-streamer moved off the central Rocky Mountains onto the Great Plains where it interacted with a surface front and a low-level jet. Each convective system interrupted the PV-streamer, and low- and mid-level vorticity accumulated along the front. One of the more spectacular MCSs that occurred 28 June 1999 is examined in detail.

在美国中部上空一连串强降雨的mcs中,一个视频流的作用
在1999年6月25日至7月5日期间,一束250 hPa的pv飘带在美国中西部上空移动,在GOES-8水汽图像上可以看到一条狭长的暗带。它在连续几天引发了一系列中尺度对流系统(mcs),从内布拉斯加州东部和东南部向墨西哥湾沿岸地区产生了强降水。mcs开始于从落基山脉中部移动到大平原的等离子流,在那里它与一个地面锋面和一个低空急流相互作用。每个对流系统都中断了pv流线,低空和中层涡度沿锋面积累。本文详细研究了1999年6月28日发生的一次较为壮观的mcs。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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