science remote_sensing earth_observing_satellites seafloor exploration navigation mapping seamount oceans

Scanning The Ocean’s Surface To See What Sits Below

Scientists have used satellites to peer through the oceans’ depths and see the shape of the Earth’s seafloor in unprecedented detail. 

Their work, using instruments aboard the CryoSat-2 and Jason-1 spacecraft, has revealed thousands of previously unknown submarine mountains across the globe. They revealed their findings in a report published today in the journal Science.

The insight into the undersea world, which remains 80 percent unmapped, came through the use of the satellites’ altimeters. These sensors transmit microwave energy pulses to the sea surface and analyze how long it takes for the signal to return. With this, scientists can understand the bulges and troughs in the ocean’s surface that relate directly to the seafloor topography beneath.

Read More

81
81 notes
https://www.tumblr.com/reblog/98996072970/zXeynGgO
Permalink
photo
science tech rov nereus marine_science biology oceans exploration oceanography robot

So long, Nereus, and thanks for teaching us more about our world.

On Saturday, Woods Hole Oceanographic Institution confirmed it lost the unmanned deep-sea explorer Nereus. During the science platform’s short service, it revealed details about the deepest parts of Earth’s oceans.

From the WHOI press release

"On Saturday, May 10, 2014, at 2 p.m. local time (10 p.m. Friday EDT), the hybrid remotely operated vehicle Nereus was confirmed lost at 9,990 meters (6.2 miles) depth in the Kermadec Trench northeast of New Zealand. The unmanned vehicle was working as part of a mission to explore the ocean’s hadal region from 6,000 to nearly 11,000 meters deep. Scientists say a portion of it likely imploded under pressure as great as 16,000 pounds per square inch."

Read More

117
117 notes
https://www.tumblr.com/reblog/85538814575/sZYHcowU
Permalink
photo
tech science mapping gis bathymetry navigation marine_biology geography antarctica oceans
New Map Brings Southern Ocean Into Relief

by Michael Keller

Map enthusiasts take note: An international team of scientists has created a complete digital map of the entire Antarctic seafloor.

It’s the first time a complete map of the continent’s surrounding bathymetric data, the seafloor’s depth and relief, has been stitched together. Until now, such detailed information has only been available for a few coastal Antarctic areas.

(Click on the chart above for a large (30 MB) version. Courtesy Jan Erik Arndt et al./IBCSO/Alfred Wegener Institute)

Read More

15
15 notes
https://www.tumblr.com/reblog/47614870579/cHJsLf9c
Permalink
text
tech robots robotics military environment biologically_inspired_engineering engineering oceans
Navy Invests In Human-sized Robot Jellyfish

image

by Michael Keller

University engineers are building a human-sized robotic jellyfish that may one day patrol the oceans for months without intervention by operators.

Still a prototype, Virginia Tech’s “Cyro” robot is powered by a rechargeable nickel metal hydride battery, and can collect, store, analyze and communicate data from onboard sensors. A distinctive soft polymer covering mimics the animal’s jelly umbrella-shaped upper bell. This is attached to a rigid robotic skeleton. Cyro measures 5 foot 7 inches in length and weighs 170 pounds.

Researchers chose to mimic the marine invertebrate because its form conserves energy during movement and the creatures are found throughout the world’s oceans.

Read More

27
27 notes
https://www.tumblr.com/reblog/46855628680/Epzv32tt
Permalink
text

LATEST