Equatorial and low latitude thermospheric winds: Measured quiet time variations with season and solar flux from 1980 to 1990
Equatorial and low latitude thermospheric winds: Measured quiet time variations with season and solar flux from 1980 to 1990
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DOI：
10.1029/1999ja900174
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发表时间：
1999-08
影响因子：
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通讯作者：
M. A. Biondi;S. Sazykin;B. Fejer;J. Meriwether;C. Fesen
中科院分区：
文献类型：
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作者：
M. A. Biondi;S. Sazykin;B. Fejer;J. Meriwether;C. Fesen
在秘鲁的阿雷基帕和波多黎各的阿雷西博，利用法布里-珀罗干涉仪测量的夜光630 nm谱线的多普勒频移，系统地确定了热层风。风数据库（1983 - 1990年在阿雷基帕和1980 - 1990年在阿雷西博）已被编辑，以消除地磁干扰条件下的测量，然后按季节和太阳通量水平排序。然后取平均值，得到两个地点夜间风变化的气候特征。一种新的平均技术，多元回归分析，已被应用到数据，并与我们以前的分箱平均值的结果进行比较。在阿雷基帕和阿雷西博天文台，这是在赤道两侧的相同的地理纬度观测到的风的行为进行了对比，以建立季节性的流动模式。回归分析的结果，然后进行了比较，由美国国家大气研究中心的热层电离层电动力学大气环流模式提供的预测行为。在许多情况下，测量和预测之间的定性协议被发现的风向和时间变化，在-0-50米/秒的幅度差异。然而，发现一些显着的差异可能是由电离层-热层耦合效应引起的。总体结果为建立赤道和低纬度地区热层风的气候学提供了重要的一步。
Thermospheric winds have been systematically determined at Arequipa, Peru, and Arecibo, Puerto Rico, from Fabry-Perot interferometer measurements of Doppler shifts in the nightglow 630 nm line. The wind databases (1983 - 1990 at Arequipa and 1980 - 1990 at Arecibo) have been edited to eliminate measurements during geomagnetically disturbed conditions, then sorted by season and solar flux level. Following this, they were averaged to obtain the climatological behavior of the nighttime wind variations at the two locations. A new averaging technique, multivariate regression analysis, has been applied to the data, and the results compared to our prior binning averages. The observed wind behaviors at the Arequipa and Arecibo Observatories, which are at equal geographic latitudes on opposite sides of the equator, are contrasted to establish the seasonal flow patterns. The regression analysis results have then been compared with the predicted behavior provided by the National Center for Atmospheric Research's Thermosphere-lonosphere-Electrodynamics General Circulation Model. In many cases, qualitative agreement between measurements and predictions is found as to wind directions and temporal variations, with differences in magnitude of - 0-50 m/s. However, some striking differences are found that may arise from ionosphere-thermosphere coupling effects. The overall results provide an important step in establishing the climatology of the thermospheric winds at equatorial and low-latitude sites.