Mobile Pressure Calibrator for the Development of Submarine Geodetic Monitoring Systems
Mobile Pressure Calibrator for the Development of Submarine Geodetic Monitoring Systems
复制标题
用于开发海底大地测量监测系统的移动压力校准器
DOI：
10.1029/2020jb020284
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Araki Eiichiro
中科院分区：
文献类型：
--
作者：
Machida Yuya;Nishida Shuhei;Kimura Toshinori;Araki Eiichiro
在孕震区使用压力计网络监测厘米尺度的长期海底垂直位移是了解板间耦合的真实的时间强度的关键。移动的压力校准器（MPC）是为校准分辨率小于1百帕/年（相当于约1厘米/年）的海底压力计网络而开发的。海底压力计的固有漂移通过比较海底压力计和MPC之间的原始观测值并随后减去长期压力数据来估计。2018年10月，进行了三次现场压力测量，以评估MPC的测量不确定度。校准器被放置在海底压力计附近，该压力计安装在日本近海南海海槽约1 750米的深度，并测量了校准器和海底压力计之间的压力差。MPC内部使用的压力计的漂移分量是根据现场海底压力测量前后在实验室进行的校准进行估计和校正的。结果表明，现场测量的不确定性为0.04 hPa，因此有可能探测到长期的小海底位移。我们继续比较MPC和海底压力计在几个月到几年的时间间隔内的偏差，并估计海底压力计的漂移。
Monitoring long‐term vertical seafloor displacements at the centimeter scale using a pressure gauge network in the seismogenic zone is key to understanding the real‐time strength of interplate coupling. The mobile pressure calibrator (MPC) was developed for calibrating a seafloor pressure gauge network with a resolution of less than 1 hPa/year, equivalent to about 1 cm/year. Inherent drift of the seafloor pressure gauges is estimated by comparing the raw observations between the seafloor pressure gauges and the MPC and subsequently subtracting the long‐term pressure data. In October 2018, three in situ pressure measurements were conducted to evaluate the measurement uncertainty of the MPC. The calibrator was placed adjacent to a seafloor pressure gauge, which is installed at a depth of about 1,750 m in the Nankai Trough offshore Japan, and measured the pressure differences between the calibrator and the seafloor pressure gauge. The drift component of the pressure gauge used inside the MPC was estimated and corrected based on calibrations performed in the laboratory before and after the in situ seafloor pressure measurements. The results indicated an uncertainty of 0.04 hPa for the in situ measurements and therefore the possibility of detecting small, long‐term seafloor displacements. We continue to compare the MPC and seafloor pressure gauge deviations over intervals of several months to years and estimate the drift of the seafloor pressure gauge.
登录
查看更多内容
影响因子：
5.6
作者：
Kajikawa, Hiroaki;Kobata, Tokihiko
通讯作者：
Kobata, Tokihiko
根据海啸数据得出的 1946 年南海道地震断层模型
影响因子：
2.3
作者：
M. Ando
通讯作者：
M. Ando
从实验和现场观察推断石英压力计的长期特征
DOI：
10.1109/oceans-taipei.2014.6964447
发表时间：
2014
期刊：
OCEANS 2014 - TAIPEI
影响因子：
--
作者：
H. Matsumoto;E. Araki;K. Kawaguchi;S. Nishida;Y. Kaneda
通讯作者：
Y. Kaneda
用于海底大地测量的移动压力校准器的开发
DOI：
10.1109/oceanskobe.2018.8559426
发表时间：
2018
期刊：
2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)
影响因子：
--
作者：
Y. Machida;S. Nishida;E. Araki;T. Kimura;H. Matsumoto;K. Kawaguchi
通讯作者：
K. Kawaguchi
DOI：
10.1109/oceanskobe.2018.8559178
发表时间：
2018
期刊：
2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)
影响因子：
--
作者：
W. Wilcock;D. Manalang;M. Harrington;E. Fredrickson;G. Cram;J. Tilley;J. Burnett;Derek Martin;Taro Kobayashi;J. Paros
通讯作者：
J. Paros