山东地区重力场时空动态演化特征

Space-time Dynamic Evolution Characteristics of Gravity Field in Shandong

系统分析了山东地区1996—2010年期间流动重力测量资料,研究了重力场的时空动态演化特征。区域重力场总的趋势变化为山东地区以正值变化为主,鲁南地区变化平稳,幅度较小,胶东地区变化幅度稍大,胶东西部尤其潍坊西到滨州方向,重力变化以每年7×10-8m/s2的平均速率呈逐年递增的趋势。从近两年开始监测并引入绝对重力观测以来,变化最大的地区主要集中在鲁中北部(淄博—大山)方向。

Mobile gravity observation data of Shandong from 1996 to 2010 are analyzed and space-time dynamic evolution characteristics of gravity field are studied. The general variation trend of regional gravity field is that positive value variation is dominated. Variation is steady and small in southern part of Shandong ; variation in eastern part is a little bit large ; Western Jiaodong especially in the direction from western Weifang to Binzhon, the gravity variation trends to increase year by year at the mean velocity of 7 x 10^-8m/s^2 each year. The area where the variation is greatest is located on the direction of medium-northern Shandong（from Zibo to Dashan） since monitoring begins and absolute gravity observation is introduced in the past two years.