Abstract
利用安装于Andoya Rocket Range(69.14°N,16.02°E)的3MHz、窄波束中频雷达2006年7月14日至8月14日之间的观测数据,研究了潮汐的变化特点并与GSWM模式的结果进行了比较.结果表明.在78～94km潮汐的纬向和经向分量随着高度的增加都经历了由弱到强然后减弱的过程.这说明潮汐在上传过程中很可能与其他波动相互作用而发生不稳定,在不稳定区域上方又生成新的潮汐波继续稳定地向上传播,或者有重力波等其他波动在此区域沉积动量导致潮汐振幅增大.潮汐振幅除了在垂直方向上发生变化。它随着时间演化也表现出显著的短期变化特点,逐日变化强度有时可达到3倍左右.结合近来的研究结果。可以认为,重力波的不稳定和破碎也可能是造成这种瞬态变化的原因之一.与GSWM-00模式的比较说明,GSWM-00模式能够较好地预测出周日潮汐的振幅和相位,而对半日潮汐的预测结果并不理想.
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