摘要
利用IERS协议上的方法和DE405星历文件,基于三峡地区CORS站和重力台站位置,计算了从2011年到2015年6月固体潮每2 h对三峡地区地壳垂直形变和重力变化的影响,并计算了2012年12月14日大潮期间固体潮影响分布。研究发现,三峡地区固体潮有很强的周期性,存在半月和半年的长周期、一天和半天的短周期。三峡地区农历每月月中和月底前后有2次大潮,月中和月底的大潮潮差相差约1/4;每年冬季(月球赤纬28°36',约11、12、1月)和夏季(约5、6、7月,太阳高度角接近最大)大潮潮差大,春季和秋季大潮潮差小。大地高最大潮高0.346 m,最低潮高-0.190 m(参考历元2000.0);固体潮对重力与对垂直形变影响异相,最大值110μGal,最小值-200μGal。区域固体潮呈明显的条带分布,固体潮对垂直形变与重力变化影响的增减方向相反。本文的研究成果可用于CORS站、重力台站的固体潮影响分析,为局部固体潮相关研究提供参考。
In this paper, using the method of IERS protocol and DE405 ephemeris file, based on the CORS station and gravity station located in the Three Gorges area, the vertical crustal deformation and gravity changes in Three Gorges area from 2011 to June 2015 tide every 2 hours are calculated, and the spring tide tide influence distribution on December 14, 2012 is calculated. The results indicated that the solid tide in Three Gorges area has very strong periodicity,the long period of half month and half year, the short period of one day and half day.There are 2 times spring tide in Three Gorges area before and after the end of the per lunar month, the middle of a month and month at the end of the spring tide range is about 1/4; the annual winter （lunar declination 28 or 36, about November, December and January） and summer （about May,June and July, the solar altitude angle is close to the maximum tide） large tidal range, the spring and autumn small tidal range. High maximum tidal geodetic height 0.346 m and neap high -0.190 m （ reference epoch 2000.0） ; solid tide on gravity and the vertical deformation of heterogeneous, a maximum of 110 μGal, minimum -200 μGal. Regional solid tide is obvious strip distribution, solid tide of vertical deformation and gravity changes influence the increase or decrease in the opposite direction. The research results of this paper can be for CORS, gravity stations of solid tide effect analysis,which provide a reference for related studies of the local solid tide.
出处
《测绘通报》
CSCD
北大核心
2017年第3期9-12,共4页
Bulletin of Surveying and Mapping
基金
重点研发计划(2016YFB0501702)
关键词
三峡地区
固体潮
垂直形变
重力固体潮
Three Gorges area
solid tide
vertical deformation
Gravity solid tide
