Aerial Observations of the East African Low-Level Jet stream
Aerial Observations of the East African Low-Level Jet stream
复制标题
东非低空急流的空中观测
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
J. Findlater
中科院分区：
文献类型：
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作者：
J. Hart;G. Rao;H. V. D. Boogaard;John A. T. Young;J. Findlater
本文叙述了1977年6月和7月用一架远程研究飞机对东非低空急流的观测。我们目前的研究飞行过程中的数据在飞机上的实时显示的基础上的结果。喷流核心位于东经40度左右，高度在1至2公里之间。喷流在核心以西有一个非常尖锐的水平切变层，而向东延伸到海洋上空的切变不太明显。虽然持续从南方流动，但它在陆地上经历了强烈的日变化。此外，还观察到了较长时间尺度上的其他结构变化。本文介绍了急流的运动学和热力结构，以及更上游的低空气流。根据这些数据，估计的跨赤道水汽通量比以前认为的要高得多。
Abstract This paper describes observation of the East African low-level jet stream obtained during June and July 1977 with a long-range research aircraft. We present results based on the real-time display of data on board the aircraft during the research flights. The jet stream core was located at about 40°E between 1 and 2 km altitude. The jet had a very sharp horizontal shear layer to the west of the core, with less pronounced shear to the east extending out over the ocean. Although flowing persistently from the south, it experienced a strong diurnal change over land. In addition, other changes in structure on a longer time scale were observed. This article presents the kinematic and thermal structure of the jet, and the low-level flow further upstream. Based on these data, the estimated cross-equational water vapor flux across the equator was found to be much higher than previously thought.