摘要
基于山东地壳运动GPS观测网络(CMONOSD)提供的连续观测结果,经过GAMIT/GLOBK软件处理,再采用GRACE,LAD,SG及GLDAS分析陆地水引起的重力变化,分析证明,在该地区陆地水导致的空间重力变化可达100.12±0.7 nms-2量级,采用LAD模型会导致重力长期以微小趋势上升,反之采用GLDAS模型会导致重力长期以微小趋势下降。通过研究大气负荷、陆地水和非潮汐海洋对山东省各基准站垂直位移的影响,发现大气负荷对台站垂直位移的影响最大为8 mm,陆地水次之,非潮汐海洋的影响最小。
Based on the crustal movement observation of Shandong(CMONOSD) with the Shandong province of base station continuous observations,we use the principal component analysis,and analysis of GPS reference station vertical displacement of seasonal variation.After GAMIT/GOLBK software for data processing,through the GRACE and LAD and SG and GLDAS to analyze the gravity change,we can see the gravity change caused by water can reach to 100.12±0.7 nms-2.The LAD model will lead to the gravity long-term small rise,and using GLDAS model will lead to the gravity long-term small decline.By studying the influence of atmospheric load,land water and non tidal sea in Shandong province on the reference station vertical displacement,we find the maximum influence of atmospheric load on vertical displacement is 8 mm,and terrestrial water is the second,and the influence of tidal sea has the least importance.
出处
《测绘与空间地理信息》
2013年第5期45-47,共3页
Geomatics & Spatial Information Technology
基金
国家自然科学基金项目(41104023)
山东省自然科学基金(ZR2010DL003)
山东省科技发展项目(2011GSF12004)资助
关键词
GPS时间序列
重力变化
垂直位移
环境因素
季节变化
GPS time series
gravity change
vertical displacement
environment factor
seasonal variation
