Hi brenda
Was supposed to post it here but posted it in the other section
Please nennie ID for me - Marine Aquariums of South Africa
26277 items (0 unread) in 5 feeds


|
A satellite that will map the saltiness of seawater has gone in orbit. Data from the Aquarius/SAC-D spacecraft will help scientists understand better the processes that drive ocean circulation and the movement of freshwater around the planet. . . Scientists have been able to measure ocean salinity for decades by lowering instruments from ships or by deploying robotic floats, but the technology to sense this property from orbit is a recent innovation. Salinity is of interest to researchers because it is both a determinant of ocean behaviour and a tool to diagnose what might be happening in the climate system. Aquarius carries three high-precision radio receivers that will record the natural microwave emissions coming up off the water's surface. These emissions vary with the electrical conductivity of the water - a property directly related to how much dissolved salt it is carrying. Together with temperature, salinity will define water density, and density and wind are the wheels of ocean circulation - the means by which Earth moves much of the energy it receives from the Sun around the globe . . Our goal is to retrieve salinity at 0.2 parts per thousand," said Aquarius Principal Investigator Gary Lagerloef of Earth & Space Research in Seattle. "That's the equivalent concentration if you were to take a dash of salt about the same as one-eighth of teaspoon and put it in a gallon of water. That works out to about one millilitre of salt in six litres of water. That's the amount of salinity change that Aquarius will be able to observe from month to month over any part of the ocean. |
Location:AM Kalk Stirrer
Shipping or Collection only:East London
Photo's and description/list of items for sale:either at buyers risk/expense
Notes:
![]()
its the one on the right, brand new never used
will try take sime closeups tomorrow if anyone is interested.
R1700 Neg

|
Manila - Laughing cicadas and small cat sharks are among scores of species believed new to science discovered by US and Filipino researchers in waters and islands of the Philippines, the team said on Wednesday. The finds showcased the vast biodiversity of the Southeast Asian archipelago that is now under severe threat, said the experts from the California Academy of Sciences and local institutions. The team found a rich harvest of starfish, sea urchins, eels and barnacles, many of which had not been previously documented by scientists, said Richard Mooi, one of the California marine scientists. We found at least 75 new species, perhaps more. A lot more analysis is needed, he told a forum to announce the discoveries. Unquestionably, we found 20 new species of starfish and sea urchins alone, Mooi added. Fellow academy scientist John McCosker said they discovered several small cat sharks with brown backs and having dark stripes and white bellies, colours which he had never seen on any other shark before. Picked up by a trawler net 2,000 metres below the waves, the sharks are about 60 centimetres (two feet) long and feed on shrimp, said McCosker, head of the aquatic biology department. |
