随着科学技术的发展,科学家们根据海洋测量与深度测量的结果推算,海底面积为36100万km~2,约为整个地球面积的71％,南北半球的海洋面积不同,北半球海洋面积占陆地面积61％,南半球海洋面积占陆地面积的81％。超过5000m的深海沟占全部海洋面积的1.2％。 海底平均深度3795m,而海洋最大深度是长岛附近的马利亚纳海盆,深度达11022m。几个大洋中最深的是太平洋,它的平均深度为4280m。 With the development of science and technology, scientists estimated from the results of oceanographic and in-depth measurements that the seafloor area is 361 million km2, which is about 71% of the total area of ​​the earth. The area of ​​the ocean in the northern and southern hemispheres varies. The area of ​​the ocean in the northern hemisphere accounts for the land area 61%, the southern hemisphere ocean area accounted for 81% of land area. Deep trenches more than 5000m account for 1.2% of the total ocean area. The average depth of the seafloor is 3795m, while the maximum depth of the ocean is the Maliana basin near Long Island with a depth of 11022m. The deepest of several oceans is the Pacific Ocean, with an average depth of 4280m.