Engineering College, Ocean University of China, Qingdao 266100, China; Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China.
Engineering College, Ocean University of China, Qingdao 266100, China.
Mar Pollut Bull. 2024 Jan;198:115771. doi: 10.1016/j.marpolbul.2023.115771. Epub 2023 Nov 22.
Dissolved oxygen (DO) concentration is an important index of ocean systems. In this study, spatiotemporal variations in DO were analyzed in the northern Gulf of Mexico (NGM) for the period of 1992-2017. Temporal variation involves annual, monthly, and seasonal variations. The spatial scope ranged from the sea surface to 1000 m depth. The results show that: (1) DO decreased from 1992 to 2017 with a brief increase; (2) clear seasonal variation characteristics of DO were presented, and the seasonal average DO was relatively low in summer; (3) the monthly average trends of sea surface DO in different years were relatively consistent; and (4) with increasing water depth from seawater surface to 1000 m, the average DO of 1992 to 2017 tended to decrease and then increase. The results aim at shedding some light on the assessment of DO change in the NGM over the past quarter century.
溶解氧（DO）浓度是海洋系统的重要指标。本研究分析了 1992-2017 年期间墨西哥湾北部（NGM）的 DO 时空变化。时间变化包括年际、月际和季节性变化。空间范围从海面到 1000 米深度。结果表明：（1）DO 从 1992 年到 2017 年逐渐减少，略有增加；（2）DO 呈现出明显的季节性变化特征，夏季的季节性平均 DO 相对较低；（3）不同年份海面 DO 的月平均趋势较为一致；（4）从海面到 1000 米水深，1992 年至 2017 年的平均 DO 呈先减少后增加的趋势。本研究旨在为过去四分之一个世纪 NGM 中 DO 变化的评估提供一些参考。
