Midlatitude thermospheric winds from incoherent scatter radar and theory
Midlatitude thermospheric winds from incoherent scatter radar and theory
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DOI：
10.1029/rs009i002p00301
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发表时间：
1974-02
期刊：
影响因子：
1.6
通讯作者：
J. Salah;J. Holt
中科院分区：
文献类型：
--
作者：
J. Salah;J. Holt
Millstone Hill非相干散射雷达测量的电离层等离子体垂直漂移被分解为考虑离子扩散和半日电场的中性粒子运动估计。在F区电子密度相对较高的两个春分日，在300公里处产生的中性环流由夜间100 - 150 m/sec-1的赤道风和白天25 - 50 m/sec-1的极向风组成。风型的谐波分析得出一个80至100 m sec/sup-1/的周日向北分量，在中午附近达到最大值，在0600 LT时的半日分量为35 m sec/sup-1/，盛行南风约为20 m sec/sup-1/。观测结果与潮汐理论预测进行了比较，并解释通过一个简化的整合的水平运动方程，通过该方程的纬向平流，离子阻力，粘度和压力梯度的影响进行了研究。虽然所观察到的风的模式是一致的，一般来自全球模型的基础上卫星拖曳观测，各种差异的振幅和相位的日膨胀的注意和讨论。（auth）
Ionospheric plasma vertical drifts measured by the Millstone Hill incoherent scatter radar are decomposed into estimates of meridional neutral particle motion by accounting for ion diffusion and semidiurnal electric fields. For two equinoctial days with relatively high F-region electron densities the resulting neutral circulation at 300 km is composed of equatorward winds of 100 to 150 m sec/sup -1/ at night and poleward winds of 25 to 50 m sec/sup -1/ during the day. Harmonic analysis of the wind pattern yields a diurnal northward component of 80 to 100 m sec/sup -1/ with a maximum near noon, a semidiurnal component of 35 m sec/sup -1/ at 0600 LT and a prevailing southward wind of about 20 m sec/sup -1/. The observations are compared with tidal theory predictions and are interpreted by means of a simplified integration of the horizontal equations of motion through which effects of zonal advection, ion drag, viscosity, and pressure gradients are studied. Although the observed wind pattern is consistent in general with that derived from global models based on satellite drag observations, various discrepancies concerning the amplitude and phase of the diurnal bulge are noted and discussed. (auth)