Results 261 to 270 of about 355,580 (300)

Radar Detectability of a Subsurface Ocean on Europa

Icarus, 1998
Abstract A spacecraft in orbit around Jupiter's moon Europa can use ice penetrating radar to probe for a possible liquid water ocean beneath Europa's surface ice and to characterize other important subsurface structure. Consideration of available constraints on the properties of Europa's ice, possible subsurface temperature gradients, and possible ...
Christopher F. Chyba, Steven J. Ostro, Bradley C. Edwards   +2 more
openaire   +1 more source

Subsurface ocean is blooming

Phytoplankton, ubiquitous microorganisms in the world’s oceans, play a fundamental role in marine ecosystems. These organisms synthesize organic matter from sunlight, supporting the entire marine food web and driving oceanic life. Through photosynthesis, phytoplankton absorb atmospheric carbon dioxide, making them integral to the biological carbon pump—
Marin Cornec, Herve Claustre
openaire   +1 more source

The temperature of Europa's subsurface water ocean

Icarus, 2004
A 100 km deep liquid water ocean probably underlies the icy exterior of Jupiter’s satellite Europa. The long-term persistence of a liquid ocean beneat ha n ice shell presents a thermal conundrum: Is the temperature of the ocean equal to the freezing point of water at the bottom of the ice shell, or is it equal t o the somewhat warmer temperature at ...
H.J Melosh, A.G Ekholm, A.P Showman, R.D Lorenz   +3 more
openaire   +1 more source

Ocean Wave Forces on a Subsurface Sphere

Journal of the Waterways and Harbors Division, 1969
There is an absence of field data for the surface wave-induced forces on a submarine, spherical structure. An ocean test site was established in 25 ft of water to measure the time histories of force exerted on an 8 in. sphere and the wave pressure interpretation of the surface elevation above the sphere.
Robert A. Grace, Frederick M. Casciano
openaire   +1 more source

Seismic Detectability of a Subsurface Ocean on Europa

Icarus, 2001
Abstract A seismometer placed on Jupiter's moon Europa can use passive monitoring to determine the presence or absence of a possible liquid water ocean beneath Europa's surface ice and estimates of the thickness of the ice shell itself. Using probable seismic velocities for Europa's ice it is demonstrated that surface waves propagating in the ...
openaire   +1 more source

Airborne lidar detection of subsurface oceanic scattering layers

Applied Optics, 1988
The airborne lidar detection and cross-sectional mapping of submerged oceanic scattering layers are reported. The field experiment was conducted in the Atlantic Ocean southeast of Assateague Island, VA. NASA's Airborne Oceanographic Lidar was operated in the bathymetric mode to acquire on-wavelength 532-nm depth-resolved backscatter signals from shelf ...
F E, Hoge, C W, Wright, W B, Krabill, R R, Buntzen, G D, Gilbert, R N, Swift, J K, Yungel, R E, Berry   +7 more
openaire   +2 more sources

The Many Fates of Pluto's Subsurface Ocean

Journal of Geophysical Research: Planets
Abstract A continuously increasing number of objects in our solar system have been classified as “ocean worlds,” harboring recent or past subsurface oceans of liquid water. These discoveries raise the potential of persistent habitability even in the frigid environments of the outer solar system.
Julia Miller, Elodie Lesage, Samuel Howell, Samuel Birch   +3 more
openaire   +1 more source

Observation of a Subsurface Oil-Rich Layer in the Open Ocean

Science, 1979
A layer of water at a depth of 200 meters containing 3 to 12 milligrams per liter of oil was found during February and March 1978 over a distance of 800 nautical miles in the southwest North Atlantic and the eastern Caribbean. The geochemistry and carbon-14 activity of the oil shows it to be a weathered crude, probably from a submarine seep.
G R, Harvey, A G, Requejo, P A, McGillivary, J M, Tokar   +3 more
openaire   +2 more sources

The direct measurement of subsurface currents in the oceans

Deep Sea Research (1953), 1954
Abstract Direct measurements have provided a comparatively small proportion of our knowledge of subsurface currents in the oceans. Such measurements are necessary, however, in order to confirm and supplement the estimates of currents obtained by other methods, and in this article a survey is given of the measurements which have already been made ...
openaire   +1 more source

Acidification of Europa's Subsurface Ocean as a Consequence of Oxidant Delivery

Astrobiology, 2012
Oxidants are formed at the surface of Europa and may be delivered to the subsurface ocean, possibly in great quantities. Whether these substances would be available for biological metabolism is uncertain, because they may react with sulfides and other compounds to generate sulfuric and other acids.
Pasek, Matthew A., Greenberg, Richard
openaire   +3 more sources