DGS AT1M-11型海洋重力仪在东北印度洋的应用与研究*

doi:10.11978/2025056

热带海洋学报 ›› 2026, Vol. 45 ›› Issue (1): 168-177.doi: 10.11978/2025056CSTR: 32234.14.2025056

DGS AT1M-11型海洋重力仪在东北印度洋的应用与研究^*

王星月(), 毛华斌(), 戚永锋, 邢焕林, 余凌晖, 李先鹏

热带海洋环境与岛礁生态全国重点实验室(中国科学院南海海洋研究所), 广东广州 511458

收稿日期:2025-04-18 修回日期:2025-05-06 出版日期:2026-01-10 发布日期:2026-01-30
通讯作者: 毛华斌。email: maohuabin@scsio.ac.cn
作者简介:
王星月(1999—), 女, 助理工程师, 从事地球物理研究。email: wangxingyue@scsio.ac.cn
*本研究的数据由中国科学院南海海洋研究所“实验6”科考船执行的国家自然科学基金共享航次(航次编号: NORC2022-10+NORC2022-303)获取, 对全体船员及科调队员致谢。感谢美国国家航空航天局(NASA)和德国宇航中心(DLR)联合的重力恢复与气候实验(GRACE)提供的重力场数据
基金资助:
国家自然科学基金面上项目(42276193); 国家自然科学基金共享航次计划项目(42149910)

Application and study of the DGS AT1M-11 marine gravimeter in the northeastern Indian Ocean^*

WANG Xingyue(), MAO Huabin(), QI Yongfeng, XING Huanlin, YU Linghui, LI Xianpeng

State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 511458, China

Received:2025-04-18 Revised:2025-05-06 Online:2026-01-10 Published:2026-01-30
Contact: MAO Huabin. email: maohuabin@scsio.ac.cn
Supported by:
National Natural Science Foundation of China(42276193); Shiptime Sharing Project of National Natural Science Foundation of China(42149910)

摘要/Abstract

摘要：

开展海洋区域重力场研究对理解海洋动力过程、海底地质构造及全球气候变化具有重要意义。高精度海洋重力勘探技术成为目前海洋重力场调查的发展趋势。中国科学院南海海洋研究所“实验6”科考船配备了DGS AT1M-11型海洋重力仪, 该重力仪具有高精度、高可靠性、可全局动态测量的特点。在该重力仪开始使用之前, 对其进行了精度评估, 包括静态测试、内符合精度测试, 结果均符合海洋调查测量规范的要求。利用2022年在东北印度洋采集的实测数据与重力恢复及气候试验(gravity recovery and climate experiment, GRACE)重力场数据相对比, 其结果呈现出基本一致的趋势, 且该航次的航前航后基准测试与重力交点差结果分别为−0.73mGal与1.15mGal, 表明该仪器数据具有较高准确性, 可用于高精度海洋重力测量。10°S以北90°E海岭重力场与水深不成比例, 说明地壳厚度的均衡补偿存在差异, 海岭由非均质性的物质组成。通过对实测数据所获得的自由空间重力异常进行反演, 结果表明在90°E海岭之下存在与地形起伏载荷补偿相关的增厚地壳。

关键词: DGS AT1M-11型海洋重力仪, 90°E海岭, 东北印度洋, 重力模拟, “实验6”科考船

Abstract:

In marine areas, the study of the gravity field is of great significance for understanding marine dynamic processes, submarine geological structures, and global climate change. High-precision marine gravity exploration technology has become the current development trend in marine gravity field investigation. The R/V “Shiyan 6” of the South China Sea Institute of Oceanography, Chinese Academy of Sciences, is equipped with a DGS AT1M-11 marine gravimeter, which is characterized by high precision, high reliability, and the ability to conduct global dynamic measurements. Before the gravimeter was put into use, the accuracy was evaluated, including static tests and internal conformity accuracy tests, all of which met the requirements of the Marine Survey Measurement Specification. The measured data collected in the northeastern Indian Ocean in 2022 was compared with the gravity field data from the Gravity Recovery and Climate Experiment (GRACE), which showed a basically consistent trend. Additionally, the results of the pre- and post-cruise benchmark tests of the voyage and the gravity intersection point difference are −0.73 mGal and 1.15 mGal respectively, indicating that the data of this instrument is highly accurate and can be used for high-precision marine gravity measurements. The gravitational field of the 90°E Ridge north of 10°S is not proportional to the water depth, suggesting differences in equilibrium compensation for crustal thickness and that the ridge consists of non-homogeneous material. Gravity modeling of the free-air gravity anomalies obtained from the measured data indicates the presence of a thickened crust beneath the 90°E Ridge, associated with compensation for topographic relief loads.

Key words: DGS AT1M-11 marine gravimeter, 90°E Ridge, northeastern Indian Ocean, gravity modeling, R/V “Shiyan 6”

中图分类号:

P738.2

王星月, 毛华斌, 戚永锋, 邢焕林, 余凌晖, 李先鹏. DGS AT1M-11型海洋重力仪在东北印度洋的应用与研究^*[J]. 热带海洋学报, 2026, 45(1): 168-177.

WANG Xingyue, MAO Huabin, QI Yongfeng, XING Huanlin, YU Linghui, LI Xianpeng. Application and study of the DGS AT1M-11 marine gravimeter in the northeastern Indian Ocean^*[J]. Journal of Tropical Oceanography, 2026, 45(1): 168-177.

图/表 10

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日期	时间	地点	桥面至水面距离/m	船舶吃水/m	重力仪读数/mGal
2022-03-10	12:40	南海海洋研究所新洲码头	2.51	5.6	10108.8
2022-05-22	16:14	南海海洋研究所新洲码头	1.75	5	10106.6

交点序号	经度	纬度	第一次经过		第二次经过		两次差值/mGal
交点序号	经度	纬度	时间(北京)	重力/mGal	时间(北京)	重力 /mGal	两次差值/mGal
1	88°59′59.64″E	9°59′50.28″S	2022-03-25, 23:54:02	9467.46	2022-03-29, 02:59:14	9466.54	−0.92
2	87°06′16.92″E	0°02′37.68″N	2022-04-05, 15:15:05	9300.89	2022-05-01, 10:20:58	9302.29	−1.41
3	89°54′06.12″E	2°59′54.96″N	2022-04-08, 23:04:28	9336.72	2022-04-11, 10:02:54	9337.79	1.06

DGS AT1M-11型海洋重力仪在东北印度洋的应用与研究^*

Application and study of the DGS AT1M-11 marine gravimeter in the northeastern Indian Ocean^*

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DGS AT1M-11型海洋重力仪在东北印度洋的应用与研究*

Application and study of the DGS AT1M-11 marine gravimeter in the northeastern Indian Ocean*

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DGS AT1M-11型海洋重力仪在东北印度洋的应用与研究^*

Application and study of the DGS AT1M-11 marine gravimeter in the northeastern Indian Ocean^*