Observations of QP radar echo structure consistent with neutral wind shear control of the initiation mechanism

C. J. Pan, M. F. Larsen

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The semidiurnal variations in quasi-periodic echo structure parameters associated with midlatitude sporadic E layers observed with the Chung-Li VHF radar located in Taiwan (24.9 N, 121.2 E; 52 MHz) are presented. The results show that the periodicity decreases with increasing range rate and that the spread of Doppler velocities increases as the altitude coverage of the echoes increases. These characteristics are shown to be consistent with the variations to be expected if the shears in the neutral wind and the variations in the background mean flow are the dominant mechanisms controlling the initiation of the echo structures.

Original languageEnglish
Pages (from-to)867-870
Number of pages4
JournalGeophysical Research Letters
Volume27
Issue number6
DOIs
StatePublished - 15 Mar 2000

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