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| 马里亚纳海沟万米级水文观测研究 |
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马克1, 陈朝晖1,2, 李卓然1, 宋振杰3, 袁志伟3, 武斌3, 焦强3, 王志民3
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1.中国海洋大学 物理海洋教育部重点实验室/深海圈层与地球系统前沿科学中心 青岛 266100;2.青岛海洋科学与技术试点国家实验室 海洋动力过程与气候功能实验室 青岛 266237;3.中国海洋大学 船舶中心 青岛 266100
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| 摘要: |
| 深渊观测是开展深渊科学研究的前提。文章介绍了2020年7月"东方红3"船在马里亚纳海沟"挑战者深渊"附近完成的一次海洋调查。基于船载温盐深综合剖面测量系统获取的万米级剖面数据，分析全海深的温盐性质，并依据Thorpe尺度方法和细尺度参数化方法，进一步估算不同深度层的湍动能耗散率。结果表明："挑战者深渊"的深层海水十分稳定，3 000-5 000 dbar的温盐特征与下层绕极水相同；受弱层结背景下的内潮影响，5 000-8 000 m的耗散率显著提升。本次调查获取的万米级水文剖面为马里亚纳海沟的深渊探索提供了数据方面的支撑。 |
| 关键词: 马里亚纳海沟 挑战者深渊 温盐性质 湍动能耗散率 |
| DOI：10.11693/hyhz20201100320 |
| 分类号: |
| 基金项目:“鳌山人才”优秀青年学者计划项目，2017ASTCP-ES05号；山东省“泰山学者”青年专家项目。 |
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| STUDY ON 10000-M HYDROLOGICAL OBSERVATIONS IN THE MARIANA TRENCH |
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MA Ke1, CHEN Zhao-Hui1,2, LI Zhuo-Ran1, SONG Zhen-Jie3, YUAN Zhi-Wei3, WU Bin3, JIAO Qiang3, WANG Zhi-Min3
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1.Physical Oceanography Laboratory/Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100, China;2.Laboratory for Ocean Dynamics and Climate, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China;3.Research Vessel Center, Ocean University of China, Qingdao 266100, China
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| Abstract: |
| The observational technology at hadal depths is the prerequisite for hadal scientific research. An oceanographic survey in the vicinity of the Challenger Deep, Mariana Trench was conducted by the R/V Dongfanghong 3 in July, 2020. Based on the data of 10 000-m profiles measured shipborne CTD (conductivity, temperature, depth) profiler, the full-depth thermohaline properties of full-depth casts were analyzed, and the turbulent kinetic energy dissipation rates at different depth levels were further estimated using the Thorpe-scale method as well as fine-scale parameterization method. Results indicate that abyssal seawater in the Challenger Deep was highly stable, and thermohaline characteristics from 3 000 to 5 000 dbar were identical to the Lower Circumpolar Water. Moreover, the dissipation rates are significantly elevated between 5 000 and 8 000 m, which are induced by internal tides under weak stratification. The 10 000-m hydrological profiles documented in this investigation. |
| Key words: the Mariana Trench the Challenger Deep thermohaline property turbulent kinetic energy dissipation rate |