Ma Jun, Li Xuegang, Song Jinming, Wen Lilian, Wang Qidong, Xu Kuidong, Dai Jiajia, Zhong Guorong
CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; University of Chinese Academy of Sciences, Beijing 100049, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China.
CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; University of Chinese Academy of Sciences, Beijing 100049, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China.
Mar Pollut Bull. 2023 Feb;187:114579. doi: 10.1016/j.marpolbul.2023.114579. Epub 2023 Jan 10.
The continuous expansion of the oxygen minimum zone (OMZ) is a microcosm of marine hypoxia problem. Based on a survey in M4 seamount area of Tropical Western Pacific Ocean, the effects of thermodynamic parameters on OMZ were discussed. The study showed thermodynamic parameters mainly affect the upper oxycline of OMZ. The increase in temperature aggravates seawater stratification, which not only shallows oxycline but also increases the strength of DO stratification, promoting the expansion of OMZ. Based on relationships between thermodynamic parameters, water mass and DO, OMZ in this area is defined as follows: the water layer with low DO between the lower boundary of high-salt area and 1000 m. Moreover, the study showed that though there is no "seamount effect" on a scale of 3000 m, low-value areas of DO form at the bottom of seamount. This study will provide an evidence for expansion of OMZ exacerbated by global warming.
海洋缺氧区（OMZ）的持续扩张是海洋缺氧问题的一个缩影。基于对热带西太平洋M4海山区的调查，探讨了热力学参数对海洋缺氧区的影响。研究表明，热力学参数主要影响海洋缺氧区的上氧跃层。温度升高加剧了海水层化，这不仅使氧跃层变浅，还增加了溶解氧（DO）层化的强度，促进了海洋缺氧区的扩张。基于热力学参数、水团和溶解氧之间的关系，该区域的海洋缺氧区定义如下：高盐区下边界与1000米之间溶解氧含量低的水层。此外，研究表明，尽管在3000米尺度上不存在“海山效应”，但在海山底部形成了溶解氧低值区。该研究将为全球变暖加剧海洋缺氧区扩张提供证据。
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