Tag: Basics

Natural History / Natural History - 8 years ago

What is bathymetry?

Bathymetry map of East Flower Garden Bank. The term "bathymetry" originally referred to the ocean's depth relative to sea level, although it has come to mean “submarine topography,” or the depths and shapes of underwater terrain. In the same w...

Natural History / Natural History - 8 years ago

What is federal consistency?

Federal consistency ensures that our beautiful coasts are not threatened by government projects that could potentially harm the environment. The Coastal Zone Management Act (CZMA), passed in 1972 and administered by the Office for Coastal Mana...

Natural History / Natural History - 8 years ago

What is the smallest ocean?

A polar bear walks on the frozen surface of the Arctic Ocean. The freezing environment provides a home for a diverse range of creatures. With an area of about 5.4 million square miles, the Arctic Ocean is about 1.5 times as big as the United S...

Natural History / Natural History - 9 years ago

Can humans drink seawater?

One of the instruments scientists can use to measure salinity is a CTD rosette, which measures the Conductivity (salinity), Temperature, and Depth of the water column. Seawater contains salt. When humans drink seawater, their cells are thus ta...

Natural History / Natural History - 9 years ago

What does an oceanographer do?

Several thousand marine scientists are busy at work in the United States dealing with a diversity of important issues — from climate change, declining fisheries, and eroding coastlines, to the development of new drugs from marine resources and th...

Natural History / Natural History - 9 years ago

What is a rip current?

We all love the beach in the summer. The sun, the sand, and the surf. But just because we're having fun, doesn't mean we can forget about safety. Get the facts about rip currents in this Ocean Today video. Rip currents are powerful, narrow...

Natural History / Natural History - 9 years ago

Can the ocean freeze?

At least 15 percent of the ocean is covered by sea ice some part of the year. Ocean water freezes just like freshwater, but at lower temperatures. Fresh water freezes at 32 degrees Fahrenheit but seawater freezes at about 28.4 degrees Fahrenhe...

Natural History / Natural History - 9 years ago

What is a tsunami?

On Nov. 18, 1929, a magnitude 7.4 Mw earthquake occurred 155 miles south of Newfoundland along the southern edge of the Grand Banks, Canada. This illustration, called a Tsunami Time Travel Map, shows the arrival times of tsunami waves. Red: 1-4 h...

Natural History / Natural History - 9 years ago

What are the seven seas?

The exact origin of the phrase 'Seven Seas' is uncertain, although there are references in ancient literature that date back thousands of years. The origins of the phrase 'Seven Seas' can be traced to ancient times. In various cultures at diff...

Natural History / Natural History - 9 years ago

Do volcanoes occur in the ocean?

ROV Jason gets a close view of magma explosions and lava flows on West Mata volcano. Volcanic eruptions occur only in certain places and do not occur randomly. This is because the Earth’s crust is broken into a series of slabs known as tectoni...