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 …
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 …
Why should we care about the ocean? - NOAA's National Ocean …
Climate regulation: Covering 70 percent of the Earth's surface, the ocean transports heat from the equator to the poles, regulating our climate and weather patterns. Transportation: Seventy-six …
What is Ocean Acidification? - NOAA's National Ocean Service
2024年6月16日 · Ocean acidification refers to a reduction in the pH of the ocean over an extended period time, caused primarily by uptake of carbon dioxide (CO2) from the atmosphere.
How much oxygen comes from the ocean? - NOAA's National …
At least half of the oxygen produced on Earth comes from the ocean, mostly from tiny photosynthesizing plankton. But marine life also uses roughly the same amount of oxygen to …
A Guide to Plastic in the Ocean - NOAA's National Ocean Service
Plastics are the most common form of marine debris. They can come from a variety of land and ocean-based sources; enter the water in many ways; and impact the ocean and Great Lakes. …
What's the difference between an ocean and a sea? - NOAA's …
2024年6月16日 · Many people use the terms "ocean" and "sea" interchangeably when speaking about the ocean, but there is a difference between the two terms when speaking of geography …
Ocean Facts - NOAA's National Ocean Service
The National Ocean Service (NOS) translates science, tools, and services into action, to address threats to coastal areas such as climate change, population growth, port congestion, and …
Why is the ocean salty? - NOAA's National Ocean Service
Salt in the ocean comes from two sources: runoff from the land and openings in the seafloor. Rocks on land are the major source of salts dissolved in seawater. Rainwater that falls on land …
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, …