Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide

Q. Wu; D. A. Ortland; T. L. KilleenR. G. RobleM. E. HaganH.-L. LiuS. C. SolomonJiyao XuW. R. SkinnerR. J. Niciejewski

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Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide

机译：全球分布和年际变化中间层和降低thermospheric中性风全日潮:1。

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Using the TIMED Doppler interferometer (TIDI) mesospheric and lower thermospheric neutral-wind multiyear data set (2002–2007) and NCAR TIME General Circulation Models (GCM) 1.2 annual run results (2002–2005) at the TIDI sampling points, we study the migrating diurnal tide's global distribution, interannual, and seasonal variations in connection with the mean zonal wind interannual variations. A strong quasi-biennial oscillation (QBO) effect on the diurnal tide was observed in the TIDI data and reproduced to a lesser degree in the TIME-GCM run. The migrating diurnal tide amplitude is larger during the eastward phase of the stratospheric QBO and weaker during the westward phase. Westward mesospheric equatorial mean zonal winds appeared during the eastward phase of the stratospheric QBO (in 2002, 2004, and 2006). The strongest QBO effect on both the migrating diurnal tide and mean zonal winds was observed during the March equinox. The stronger tides may be related to the weaker gravity wave filtering in the stratosphere during the eastward phase stratospheric QBO. The TIDI data also exhibit large interhemispheric asymmetry. The westward mean zonal winds in the mesosphere appeared to be associated with the enhanced diurnal tide. The TIME-GCM 1.2 diurnal tide amplitudes are in general smaller than those observed by the TIDI instrument. Limited vertical spatial resolution for the TIME-CGM 1.2 is suggested as the cause. Future improvements are expected with a higher spatial resolution in the model.

机译：使用时间多普勒干涉仪(TIDI)中间层和降低thermospheric neutral-wind多年的数据集(2002 - 2007)和NCAR时间大气环流模式(GCM) 1.2年结果(2002 - 2005)在TIDI采样点,我们互相学习迁移全日潮的全球分布、年际和季节与平均纬向风的变化年际变化。对全日潮振荡(QBO)的影响观察TIDI数据和复制较小的程度TIME-GCM来看。全日潮振幅较大时向东平流层QBO的阶段较弱的在西阶段。中间层赤道平均纬向风出现了在东阶段的平流层QBO(2002年、2004年和2006年)。在迁移全日潮和效果在3月平均纬向风观察equinox。弱重力波过滤在同温层在平流层QBO向东阶段。TIDI数据也表现出很大的两半球间的不对称。中间层似乎是相关的增强的全日潮。潮汐振幅一般比小TIDI仪器观察到。空间分辨率TIME-CGM 1.2建议的原因。预期更高的空间分辨率模型。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2008年第5期|A05308-1-A05308-18-0|共18页
作者
Q. Wu; D. A. Ortland; T. L. KilleenR. G. RobleM. E. HaganH.-L. LiuS. C. SolomonJiyao XuW. R. SkinnerR. J. Niciejewski;
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作者单位

Space Physics Research Laboratory, University of Michigan, Ann Arbor, Michigan, USA;

Northwest Research Associates, Bellevue, Washington, USA;

Key Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing, ChinaHigh Altitude Observatory, National Center for Atmospheric Research, Boulder, Colorado, USA;

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正文语种英语
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Wind; Diurnal tides; FluconazoleWestside (USBR)MesospheretidesDiurnalSeasonal Variation;

机译：风,周日潮汐;FluconazoleWestside(USBR) MesospheretidesDiurnalSeasonal变异;

Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide

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