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宇航员邀游太空时,透过光环般的大气圈,首先映如眼帘的是一颗“蓝色的星球”。蔚蓝色的海水覆盖了地球表面积的71％,使地球成为一颗名副其实的“水的星球”。 一、辽阔的海洋 地球上海洋的总面积为3.61亿平方公里。海水的颜色受海洋深度等因素的影响而有所变化。 海的面积占海洋总面积的11％,水深平均都不到3000米,水温受大陆季节性变化的影响,盐度受附近大陆的河流和气候的影响,水体多呈黄、绿色,透明度小。海通
Astronauts invited to travel in space, through the aura of atmosphere, the first thing that catches the eye is a “blue planet.” Blue waters cover 71% of the Earth’s surface area, making the Earth a veritable “planet of water.” First, the vast ocean The total area of the ocean is 361 million square kilometers. The color of the sea water is affected by the depth of the sea and other factors. The area of the sea accounts for 11% of the total area of the ocean. The average depth of the water is less than 3000 meters. The water temperature is affected by the seasonal changes in the mainland. The salinity is affected by rivers and climates in the nearby mainland. The water bodies are mostly yellow and green with little transparency. Haitong