Marine geophysical observations(geomagnetic and gravity data) in JARE64

Sea-surface gravity and geomagnetic measurements are conducted on board the Shirase in the Southern Ocean. Ocean bottom pressure is monitored with a pressure gauge installed and recovered every summer on the ocean bottom at approximately 4000 meter deep in the Southern Ocean.本数据集的观测包含两项内容：其一为在南大洋白濑号科考船（Shirase）上开展的海面重力与地磁测量；其二为在南大洋约4000米水深的海底布设压力计，并于每年夏季回收该设备以获取海底压力监测数据。