What is marine snow? - NOAA's National Ocean Service
2020年11月5日 · Marine snow is a shower of organic material falling from upper waters to the deep ocean. VIDEO: Biological debris that falls from higher in the water column is also known …
The Global Conveyor Belt - NOAA's National Ocean Service
Thermohaline circulation drives a global-scale system of currents called the “global conveyor belt.” The conveyor belt begins on the surface of the ocean near the pole in the North Atlantic. Here, …
Why is the ocean salty, but rivers flowing into it are not?
2024年6月16日 · But over time, as rain fell to the Earth and ran over the land, breaking up rocks and transporting their minerals to the ocean, the ocean has become saltier. Rain replenishes …
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 …
What is a tsunami? - NOAA's National Ocean Service
The tsunami was generated by a large earthquake in the Southern Pacific Ocean. Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea. Out in the depths of …
What is Old Sow? - NOAA's National Ocean Service
When the tide comes in from the Bay of Fundy, located off the Atlantic Coast between the State of Maine and the Province of New Brunswick, a tremendous amount of ocean water, called a …
How is sea level rise related to climate change? - NOAA's National ...
First, as the oceans warm due to an increasing global temperature, seawater expands—taking up more space in the ocean basin and causing a rise in water level. The second mechanism is …
Where do I get real-time coastal conditions? - NOAA's National …
NOAA's nowCOAST is a GIS-based webmap service that provides frequently updated ocean observations along with coastal and marine weather forecasts now available 24 hours a day. …
Is sea level rising? - NOAA's National Ocean Service
The two major causes of global sea level rise are thermal expansion caused by warming of the ocean (since water expands as it warms) and increased melting of land-based ice, such as …
How much water is in the ocean? - NOAA's National Ocean Service
2024年6月16日 · 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 …