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A New Approach to the Derivation of Dynamic Information from Ionosonde Measurements : Volume 21, Issue 11 (30/11/-0001)

By Liu, L.

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Book Id: WPLBN0004001223
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: A New Approach to the Derivation of Dynamic Information from Ionosonde Measurements : Volume 21, Issue 11 (30/11/-0001)  
Author: Liu, L.
Volume: Vol. 21, Issue 11
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Wan, W., Ning, B., Lei, J., Luan, X., & Liu, L. (-0001). A New Approach to the Derivation of Dynamic Information from Ionosonde Measurements : Volume 21, Issue 11 (30/11/-0001). Retrieved from http://members.worldlibrary.net/


Description
Description: Wuhan Ionospheric Observatory, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, P. R. China. A new approach is developed to derive dynamic information near the peak of the ionospheric F-layer from ionosonde measurements. This approach avoids deducing equivalent winds from the displacement of the observed peak height from a no-wind equilibrium height, so it need not determine the no-wind equilibrium height which may limit the accuracy of the deduced winds, as did the traditional servo theory. This approach is preliminarily validated with comparisons of deduced equivalent winds with the measurements from the Fabry-Perot interferometer, the Millstone Hill incoherent scatter radar and with previous works. Examples of vertical components of equivalent winds (VEWs), over Wuhan (114.4° E, 30.6° N, 45.2° dip), China in December 2000 are derived from Wuhan DGS-256 Digisonde data. The deduced VEWs show large day-to-day variations during the winter, even in low magnetic activity conditions. The diurnal pattern of average VEWs is more complicated than that predicted by the empirical Horizontal Wind Model (HWM). Using an empirical electric field model based on the observations from Jicamarca radar and satellites, we investigate the contributions to VEWs from neutral winds and from electric fields at the F-layer peak. If the electric field model is reasonable for Wuhan during this period, the neutral winds contribute mostly to the VEWs, and the contribution from the E × B drifts is insignificant.

Key words. Meteorology and atmospheric dynamics (thermospheric dynamics) – Ionosphere (ionosphere-atmosphere interaction; instrument and techniques)


Summary
A new approach to the derivation of dynamic information from ionosonde measurements

 

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