A Study of Thermosphere and Mesosphere Wind observed by Fabry-Perot over middle China

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• 作者：Tao YuCong HuangGuangxin ZhaoTian MaoYungang Wang
• 会议时间：2014-10-19
• 作者单位：National Center for Space Weather,China Meteorological Administration
• 母体文献：2014年中国地球科学联合学术年会论文集
• 会议名称：2014年中国地球科学联合学术年会
• 会议地点：北京
• 主办单位：中国地球物理学会
• 语种：chi

摘要

A Fabry-Perot interferometer (FPI) system was deployed in Kelan (111.6E,38.7N),center China in November 2011,which observed the airglows at wavelengths of 892.0 nm,557.7 nm and 630.0 nm from OH and OI emissions in the upper atmosphere,to derive the wind and temperature at heights around 87 km,97 km and 250 km,respectively.Since late 2011,except under bad weather conditions or instrument or electric power failure,over 500 nights are suitable to observe the nightglow,and a series of more than 4500 measurements at each height are validated according to manufacture data quality criteria.By using of these data from late 2011 to 2013,the morphology of wind in the mesosphere and thermosphere is investigated in this study.Preliminary results are as follow: (1) at heights of 87 km and 97 km,meridional and zonal winds derived through 892.0 nm and 557.7 nm airglows usually range from -50 m/s to 50 m/s with typical random errors about 6~10 m/s at 87 km and 2~3 m/s at 97 km,it suggests an obvious semi-diurnal nighttime variations from April to October but no visible semi-diurnal variation in the rest month.The monthly mean winds are in good agreement with that of HWM93 results (2) At height of 250 km,meridional and zonal winds derived through 630.0 nm nightglow range from 80 m/s to -110 m/s with typical random errors about 8~10 m/s,and they are also good consistent with HWM93 results.(3) At the heights of 87 km and 97 km,meridional winds have a visible annual variation at 12 - 17 UT and with a little semi-annual variation in the rest time,but the zonal winds have a semi-annual variation all the night time,as for the height of 250 km,seasonal dependence of the winds is generally annual,but there are isolated cases in which a semiannual variation is observed.(4) The horizontal winds at 250 km have an evident response to two the storms happened at July 2012,which seem to be an enhancement of velocity in the southwestward wind.But no obvious storm effects can be found during the same period.Since there is a lack of simultaneous measurements of winds in the mesosphere and thermosphere in China for many years,the FPI at Kelan must be very helpful to investigate the winds and dynamics in the upper atmosphere and ionosphere over China region.