The nation's ocean and coastal agency: Supporting coastal communities, promoting a robust economy, and protecting coastal and marine ecosystems
a lionfish a survey mark GIS image of projected sea level rise school of spadefish
Beaufort Sea, north of Alaska
Ocean Fact
What is the cryosphere?

There are places on Earth that are so cold that water is frozen solid. These areas, which are subject to temperatures below 32°F for part of the year, compose the cryosphere.

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About NOS

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 contaminants in the environment, all working towards healthy coasts and healthy economies.

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Miami coastline


Supporting healthy, resilient coastal communities.


Midway Atoll


Protecting the health, productivity, and diversity of our ocean.


NOAA Coast Survey vessel


Navigation, tides, currents, and geodesy.