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Nico Danan
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ocean science  - 
 
Study links changing winds to warming in Pacific #Ocean | Santa Cruz News - KSBW Home http://buff.ly/1quFmBq
A new study released Monday found that warming temperatures in Pacific Ocean waters off the coast of North America over the past century closely followed natural changes in the wind, not increases in greenhouse gases related to global warming.
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Nico Danan
owner

ocean science  - 
 
Tiny #OceanPlastic May Be Cleaning our Seas http://buff.ly/1lHGRjk | Ocean Minds Where Fish Get Their News!
In new research published today we show that microplastics are also home to marine life, some of which could be helping to clean up the oceans.
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Serge Masse

ocean science  - 
 
 
Never-Seen-Before Whale Washes Up on New Zealand Shore http://b4in.org/c35y

A species of beaked whale known previously only from bone fragments has been seen for the first time after a mother and calf recently washed up on a New Zealand shoreline. Called the spade-toothed beaked whale, the species has understandably been hailed as the world's rarest whale.

While it's unfortunate that the first sighting of the animal comes with such a tragic scene, scientists are thrilled at the chance to learn more about this mysterious species. Until this stranding, it was unclear that the species even still existed.

“This is the first time a spade-toothed beaked whale has been seen as a complete specimen, and we were lucky enough to find two of them. It's incredible to think that, until recently, such a large animal was concealed in the South Pacific Ocean and shows how little we know about ocean biodiversity,” said lead scientist Dr. Rochelle Constantine.

Beaked whales as a group are among the least understood mammals in the world because of their elusive deep-sea, open ocean lifestyle.

None of the 21 recognized species are well known to the public; In fact, only a few of them are well known to biologists. They are characterized by their elongated beaks and their tusks, and are capable of diving to extreme depths: to over 1,000 fathoms.

More http://b4in.org/c35y
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Nico Danan
owner

ocean science  - 
 
Sea Ice Data at Your Digital Fingertips: Alaska Sea Ice History Since 1860!
http://www.oceanminds.com/sea-ice-data-online-atlas/ 
Want to know how much of the Beaufort Sea was covered in sea ice in January 1850? You can now do so!
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Chandra Bhushan Roy's profile photo
 
very important update. Thanks
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I am Wilderness

ocean science  - 
 
A new coral species discovered, Psammogorgia hookeri, by scuba divers from rocky ledges at depths to 25 meters in Peru's Paracas National Reserve.
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I am Wilderness

ocean science  - 
 
The sub Alvin, the United States' deepest-diving research submersible, has been cleared to return to work exploring the ocean's depths after a major upgrade
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Nico Danan
owner

ocean science  - 
 
Deep Connections: Atlantic Influences #Antarctica Temperature Rise
http://buff.ly/1esFZ9j
NSF: Analysis indicates that North and tropical Atlantic warming affects Antarctic climate
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Nico Danan
owner

ocean science  - 
 
Right Whale Dolphin: When The Ocean Ying Meets its Yang

http://buff.ly/1g5a7hL
The ocean is a constant source of amazement. When the Right Whale Dolphin pokes its head out of the water you are in for a treat of ying and yang.
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Nico Danan
owner

ocean science  - 
 
Killer Whale Mimic Human Boat Engine- Ocean Minds [video]
 http://buff.ly/1fS0x1E 
Wild Orca boy Luna from Vancouver island decided it was time to reverse the situation and get a human to understand how loud and annoying our engines sound.
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I am Wilderness

ocean science  - 
 
Great white sharks may live longer than previously thought, says a new study in the Northeast Atlantic Ocean using radiocarbon dating to determine age.
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I am Wilderness

ocean science  - 
 
A GEOMAR study published in the journal "Current Biology" reveals a relationship between ocean currents and variation in recruitment of European eels.
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Chandra Bhushan Roy

ocean science  - 
 
Chandra Bhushan Roy originally shared:
 
Measuring Ocean Currents
Measuring currents is a fundamental practice of physical oceanographers. By determining how ocean waters move, scientists can determine how organisms, nutrients and other biological and chemical constituents are transported throughout the ocean [1].  Other application are determining pollutant transport, tidal flows, sediment transports.
How do we measure speed of water  in ocean? 
Generally flow measurement for ocean water is done by deploying measuring instrument at seabed. Duration of deployment can vary from couple of hours to few days to even months and years. ADCP is one such instrument.
What is ADCP and why do we use it?
Acoustic Doppler Current Profiler (ADCP), is a measuring instrument. Researchers use the instrument to measure how fast water is moving across an entire water column. ADCP when installed at seafloor can measure flow speed and direction from bottom to surface at regular intervals.  Instrument can also be installed at bottom of a ship, or bridge pilings in rivers and sea.
How does it work?
ADCP uses Doppler effect to measure flow velocity in water.  ADCP transmit “pings ” of sound at a constant frequency into the water.  The pings are so highly pitched that human and even dolphins cannot hear them.  As sound waves travel they reflect back to instrument off particles suspended in moving water. Sound waves bounced back from a particle moving away from instruments axis have lower frequency when they return.  Particle moving towards the instrument send back higher frequency waves.  The difference in frequency between the sound waves instrument sends and the waves received is called the Doppler shift. Instrument uses this shift to calculate how fast the particle and water moves.
ADCP deployment  platform  and data?
ADCP that are bottom mounted need anchor to keep them on the bottom of sea. ADCP that is ship mounted need ship rack. The data from instrument can be stored in inbuilt memory or read instantly with help of connected computer.   
Water depth grater then 1m up to 1 km is measured with ADCP.
Recently  our research group conducted ADCP deployment in the South China Sea near the Bachok Marine Station, IOES, University of Malaya. Here is one video from the field deployment.  Instrument was deployed at 12 m depth.
 
References
[1] http://oceanexplorer.noaa.gov/technology/tools/acoust_doppler/acoust_doppler.html
[2] http://www.whoi.edu/science/instruments/
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3 comments
 
+Chandra Bhushan Roy very interesting back when I worked at www.marinexplore.org we work a tremendous amount on how to visualize ADCP data in an intuitive way. Interesting post thanks for sharing!
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Serge Masse

ocean science  - 
 
Serge Masse originally shared:
 
Belugas hear underwater sounds in the range 4-150 kHz. The link is to new open-access paper.
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Nico Danan
owner

ocean science  - 
 
Antarctic Circumpolar Current Carries 20% More Water Than We Thought http://buff.ly/1evxIWJ 
The Antarctic Circumpolar Current carries water around Antarctica into the Atlantic, Pacific and Indian Oceans, transferring heat & energy around the world.
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Nico Danan's profile photoChandra Bhushan Roy's profile photoSouthern Charmer's profile photo
4 comments
 
+Roberto De Almeida  Your inputs please!!! Thanks +Nico Danan .
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I am Wilderness

ocean science  - 
 
Graduate student makes major discovery on seal evolution. The finding involves why some species exhibit sexual dimorphism and others do not.
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Nico Danan
owner

ocean science  - 
 
Scientists Call for New Stewardship of the Deep Ocean
http://buff.ly/1dJfGQm 
The deep ocean, the largest domain for life on earth, is also its least explored and protected environment on earth.
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Nico Danan
owner

ocean science  - 
 
What? #CoralReef Found in Greenland! | Ocean Minds http://buff.ly/1gqBtPM  
Researchers have discovered the first ever cold-water coral reef in Greenland at a depth of nearly 3000 feet below sea-level. Scientists have found several species of coral in Greenland, but this is the first time that an actual reef has been found, according to a report in the International ...
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tom gross's profile photo
 
I think they should put it back.
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Nico Danan
owner

ocean science  - 
 
The Undersea World Of Biofluorescence: The #Ocean Party is On! http://buff.ly/1dB7mx2 #TGIF
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Stephane Barbier's profile photo
 
Incredible Nature !
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I am Wilderness

ocean science  - 
 
Researchers discovered a small new sea anemone species burrowed into the ice of the Ross Ice Shelf in the Southern Ocean, Antarctica.
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I am Wilderness

ocean science  - 
 
A new study quantifies for the first time future losses in deep-sea life, showing that even remote deep-sea ecosystems are not safe from climate change.
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