冲绳海槽中部热液区地形复杂度研究

Seabed terrain complexity study of the hydrothermal fields in the mid-Okinawa trough

基于中国科学院海洋研究所“科学”号综合考察船在冲绳海槽中部热液区采集的高分辨率海底地形数据,建立地形复杂度综合分析模型,利用窗口序列分析法以及均值变点分析法,分析了冲绳海槽中部热液区的地形复杂度。结果发现,研究区内平均地形复杂度指数为1.74,热液活动区地形复杂度指数在1.4~3.2之间,热液活动区地形相对复杂。这为计算全球海底热液区地形复杂度和寻找热液活动区位置提供了新的思路。

The study of terrain complexity is of great significance to systematically study the distribution characteristics of global submarine hydrothermal zones.In this paper,a comprehensive analysis model of terrain complexity is established based on the high-resolution seabed topographic data collected by the research ship"Science"of the Institute of Oceanology,Chinese Academy of Sciences in the hydrothermal zone of the central Okinawa Trough.Moreover,the topographic complexity of hydrothermal area in the middle Okinawa trough was analyzed by means of window sequence analysis and mean change point analysis.The results showed that the average topographic complexity index in the study area was 1.74,and the topographic complexity index in the hydrothermal active area was between 1.4 and 3.2,indicating that the terrain in the hydrothermal active area was relatively complex.We provide a new idea to calculate the topographic complexity of global submarine hydrothermal zone and find the location of hydrothermal active zone.