摘要
利用华北中东部GRACE卫星时变重力数据,以2003年、2004年重力年均值为基值,计算得到2005—2014年相对于该基值的重力场累积动态变化和差分动态变化图像,并探讨该区近10年来重力场的时空动态变化特征。结果表明:研究区10年间累积重力场以减小为主,2010年以后,差分重力变化呈NS向条带状展布,且重力变化增加,相邻期差分重力场出现反转。
Using the GRACE time-variable gravity data and set annual average values of 2003 and 2004as the base value,we obtained cumulatively dynamic changes in the gravity field and differential dynamic changes image from 2005 to 2014by calculating with respect to the above-mentioned base value,and on this basis we analyzed the spatial and temporal dynamic variations of gravity field in this region nearly a decade.The results show that the accumulated gravity field in the study area is dominated by decrease in this decade;after 2010,differential gravity changes are in the SN-trending banded distribution,gravity field changes increase and differential gravity field inverses in the adjacent phase.
出处
《华北地震科学》
2016年第2期19-26,共8页
North China Earthquake Sciences
基金
中国地震局物探中心青年基金项目(YFGEC2014010)
