Scientists at the Naval Research Laboratory’s Marine Meteorology Division in Monterey, CA, (NRL-Monterey), working with researchers from Monterey Bay Aquarium Research Institute and the National Geophysical Data Center, presented the first satellite detection of a phenomenon known as the "milky sea." The satellite observations were corroborated by a ship-based account. This research was published in the October 4, 2005, issue of the Proceedings of the National Academy of Sciences (PNAS).
Since the 17th century, "milky seas" have been associated more commonly with maritime folklore than scientific knowledge. They are mentioned in the Jules Verne classic 20,000 Leagues Under the Sea. Until this satellite detection was achieved by NRL researchers, the phenomena had only been reported in ship’s logs and their descriptions were subject to the uncertainties of human perception. Mariners have described the phenomena as giving the impression of sailing upon a field of snow or gliding over the clouds--all under the darkness of a moonless night. The glowing waters appear to extend to the horizon in all directions, and can last from several hours to several days. They are thought to be caused by enormous populations of bacterial bioluminescence, but their ephemeral nature has made it difficult to place appropriately equipped research craft in their locations.
Dr. Steven Miller, from NRL’s Marine Meteorology Division, explained that the milky sea presented in the paper was detected by the Defense Meteorological Satellite Program (DMSP). These polar-orbiting satellites feature the Operational Linescan System (OLS) instrument, which was designed primarily to monitor global cloudiness under both solar and lunar illumination. To achieve nighttime detection, the OLS uses a sensor capable of registering extremely low levels of visible light. This system has been used to detect terrestrial and atmospheric emission sources such as fires, lightning, and human activity (city lights, fishing boats, etc.) around the world. However, there have been no previous reports or demonstrations of the OLS being used to detect bioluminescence.
NRL Public Affairs | EurekAlert!
Colorado River's connection with the ocean was a punctuated affair
16.11.2017 | University of Oregon
Researchers create largest, longest multiphysics earthquake simulation to date
14.11.2017 | Gauss Centre for Supercomputing
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses