A collaborative study on temperature diurnal tide in the midlatitude mesopause region (41°N, 105°W) with Na lidar and TIMED/SABER observations
A collaborative study on temperature diurnal tide in the midlatitude mesopause region (41°N, 105°W) with Na lidar and TIMED/SABER observations
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利用 Na 激光雷达和 TIMED/SABER 观测对中纬度中层顶区域（北纬 41°，西经 105°）温度日潮汐进行合作研究
DOI：
10.1016/j.jastp.2010.02.007
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发表时间：
2010
影响因子：
1.9
通讯作者：
J. Forbes
中科院分区：
文献类型：
--
作者：
T. Yuan;C. She;D. Krueger;S. Reising;Xiaolin Zhang;J. Forbes
以2002 ~ 2008年全日周期观测资料为基础，将激光雷达观测的温度日潮汐扰动与TIMED/SABER仪器的潮汐波测量结果进行了比较，以阐明局地观测到的日潮汐扰动的性质。这两种仪器推算出的日振幅和相位分布在一年中的大部分时间里是非常吻合的。然而，冬季和早春期间激光雷达观测到的日振幅明显大于SABER观测到的日振幅，导致2月份在90km附近存在12K的显著振幅最大值，并且两种仪器的温度日振幅具有不同的季节结构。激光雷达观测的日相在分点月表现为传播波特征，在冬季月表现为“倏逝波”特征，而SABER日相全年表现为传播日潮特征，季节变化较小。激光雷达观测到的这种异常潮汐特征几乎每年冬天都会重复出现。这种潮汐特征背后的确切机制尚不完全清楚，因此需要进一步的研究和更多的实验观察。
The na lidar-observed temperature diurnal tidal perturbations, based on full-diurnal-cycle observations from 2002 to 2008, are compared with tidal wave measurements by the TIMED/SABER instrument to elucidate the nature of diurnal tidal-period perturbations observed locally. The diurnal amplitude and phase profiles deduced by the two instruments are in very good agreement most of the year. However, the lidar-observed diurnal amplitudes during winter months and early spring are considerably larger than SABER observations, leading to the existence of a significant amplitude maximum of 12K near 90km in February and a different seasonal structure of temperature diurnal amplitude from the two instruments. The lidar-observed diurnal phase shows propagating wave characteristics during equinoctial months, but exhibit “evanescent wave” behavior in winter months, whereas SABER diurnal tidal phase exhibits propagating diurnal tidal character all year long with small seasonal variation. This anomalous tidal characteristic from the lidar observations repeats almost every winter. The exact mechanism behind this tidal feature is not fully understood, therefore further investigation and more experimental observations are necessary.