What are the Seven Seas? - NOAA's National Ocean Service
2024年6月16日 · The Seven Seas include the Arctic, North Atlantic, South Atlantic, North Pacific, South Pacific, Indian, and Southern oceans. The exact origin of the phrase 'Seven Seas' is uncertain, although there are references in ancient literature that date back thousands of years.
How many oceans are there? - NOAA's National Ocean Service
2024年6月16日 · Historically, there are four named oceans: the Atlantic, Pacific, Indian, and Arctic. However, most countries - including the United States - now recognize the Southern (Antarctic) as the fifth ocean.
What is the world's smallest ocean? - NOAA's National Ocean …
2024年6月16日 · The Arctic Ocean is the smallest of the world's five ocean basins. A polar bear walks on the frozen surface of the Arctic Ocean. The freezing environment provides a home for a diverse range of creatures.
What is the largest ocean basin on Earth? - NOAA's National …
2024年6月16日 · Covering approximately 63 million square miles and containing more than half of the free water on Earth, the Pacific is by far the largest of the world’s ocean basins. All of the world’s continents could fit into the Pacific basin. The …
Where is all of the Earth's water? - NOAA's National Ocean Service
2024年6月16日 · The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.
Why should we care about the ocean? - NOAA's National Ocean …
The air we breathe: the ocean produces over half of the world's oxygen and absorbs 50 times more carbon dioxide than our atmosphere. Climate regulation: covering 70% of the Earth's surface, the ocean transports heat from the equator to the poles, regulating our climate and weather patterns.
How deep is the ocean? - NOAA's National Ocean Service
The average depth of the ocean is about 3,682 meters (12,080 feet). The lowest ocean depth on Earth is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench.
How much water is in the ocean? - NOAA's National Ocean Service
2024年6月16日 · The ocean covers more than 70 percent of the surface of our planet. It's hard to imagine, but about 97 percent of the Earth's water can be found in our ocean. Of the tiny percentage that's not in the ocean, about two percent is frozen up in glaciers and ice caps.
Is sea level rising? - NOAA's National Ocean Service
The ocean is absorbing more than 90 percent of the increased atmospheric heat associated with emissions from human activity. With continued ocean and atmospheric warming, sea levels will likely rise for many centuries at rates higher than that of the current century.
Why do we have an ocean? - NOAA's National Ocean Service
2024年6月16日 · Over vast periods of time, our primitive ocean formed. Water remained a gas until the Earth cooled below 212 degrees Fahrenheit. At this time, about 3.8 billion years ago, the water condensed into rain which filled the basins that we now know as our world ocean.
跳至内容