Results 61 to 70 of about 1,096 (152)

Annual Weather Patterns Drive Large Pulses of Saline Submarine Groundwater Discharge and Major Summer Inputs of Nutrients to the South Atlantic Bight

Journal of Geophysical Research: Oceans, Volume 131, Issue 1, January 2026.
Abstract Submarine groundwater discharge (SGD) is a significant source of nutrients to continental shelf waters. Increasing evidence suggests that most of this flow is saline (∼seawater salinity) and occurs across broad continental shelves, making it challenging to observe.
Jacob Vincent, Alicia M. Wilson, Willard S. Moore, Rachel K. Thomas, Angela N. Knapp, Susan Q. Lang, Samantha B. Joye, James L. Pinckney   +7 more
wiley   +1 more source

Subseafloor sedimentary life in the South Pacific Gyre [PDF]

Proceedings of the National Academy of Sciences, 2009
The low-productivity South Pacific Gyre (SPG) is Earth's largest oceanic province. Its sediment accumulates extraordinarily slowly (0.1–1 m per million years). This sediment contains a living community that is characterized by very low biomass and very low metabolic activity. At every depth in cored SPG sediment, mean cell abundances are 3
D'Hondt, S., Spivack, A., Pockalny, R., Fischer, J., Kallmeyer, J., Ferdelman, T., Abrams, L., Smith, D., Graham, D., Hasuik, F., Schrum, H., Stancin, A.   +11 more
openaire   +7 more sources

Impact of Anaerobic Cold Storage on Subseafloor Microbial Communities

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 12, December 2025.
Abstract Sediment cores recovered from the deep sea often cannot be sampled for microbiological analysis immediately due to the need for core splitting and processing for subsequent onboard measurements and core storage. Consequently, sections are often stored at 4°C under anaerobic conditions for extended periods.
Tastuhiko Hoshino, Kana Jitsuno, Yohei Nishikawa, Ken Ikehara, Michael Strasser, Haruko Takeyama, Fumio Inagaki   +6 more
wiley   +1 more source

Exploring Subseafloor Life with the Integrated Ocean Drilling Program [PDF]

Scientific Drilling, 2007
No abstract available. <br><br> doi:<a href="http://dx.doi.org/10.22 04/iodp.sd.5.03.2007" target="_blank">10.22 04/iodp.sd.5.03.2007</a>
D'Hondt, Steven, Inagaki, Fumio, Ferdelman, Timothy, Jørgensen, Bo Barker, Kato, Kenji, Kemp, Paul, Sobecky, Patricia, Sogin, Mitchell, Takai, Ken   +8 more
openaire   +9 more sources

Hydrothermal Circulation During Continental Breakup: Evolution of a Subseafloor Stockwork Mineralization at the South China Sea Rifted Margin

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Hydrothermal activity during continental breakup and early oceanic spreading is poorly understood due to limited samples. A basalt‐hosted hydrothermal mineralization, drilled during IODP Expedition 367/368 at the northern South China Sea at the continent‐ocean transition provides a unique opportunity to investigate this phenomenon.
Jörg Follmann, Froukje M. van der Zwan, Sven Petersen, Matthias Frische   +3 more
wiley   +1 more source

Physical balances in subseafloor hydrothermal convection cells [PDF]

Journal of Geophysical Research: Solid Earth, 2004
We use a simplified model of convection in a porous medium to investigate the balances of mass and energy within a subseafloor hydrothermal convection cell. These balances control the steady state structure of the system and allow scalings for the height, permeability, and residence time of the “reaction zone” at the base of the cell to be calculated ...
Tim E. Jupp, Adam Schultz
openaire   +1 more source

Permeability of the Pāpaku Fault Within the Hikurangi Subduction Zone Determined From the Thermal Response to a Free Flowing Well Test

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract The paucity of in situ meso‐scale permeability measurements within subduction zones makes it difficult to fully characterize hydrologic processes and conditions that influence fault zone behavior. In the Hikurangi subduction zone, where large shallow slow slips are observed, there are outstanding questions about the hydrologic influence splay ...
Roberto D. Clairmont, Patrick M. Fulton
wiley   +1 more source

Hydrothermal Plume Near‐Field Dynamics From LES and Observations

Journal of Geophysical Research: Oceans, Volume 130, Issue 10, October 2025.
Abstract Hydrothermal plumes play a crucial role in vent fields by injecting significant buoyancy flux from centimeter‐scale vents and rising hundreds of meters. This is a multiscale process, yet only the large scales have been well studied. Near‐vent dynamics remain a challenge in plume modeling, despite their importance for understanding deep‐sea ...
Cyprien Lemaréchal, Guillaume Roullet, Jonathan Gula   +2 more
wiley   +1 more source

Nitrogen isotopes in bulk marine sediment: linking seafloor observations with subseafloor records [PDF]

Biogeosciences, 2013
The stable isotopes of nitrogen offer a unique perspective on changes in the nitrogen cycle, past and present. However, the presence of multiple forms of nitrogen in marine sediments can complicate the interpretation of bulk nitrogen isotope measurements.
J.-E. Tesdal, E. D. Galbraith, M. Kienast   +2 more
doaj   +1 more source

Carbon and nitrogen assimilation in deep subseafloor microbial cells [PDF]

Proceedings of the National Academy of Sciences, 2011
Remarkable numbers of microbial cells have been observed in global shallow to deep subseafloor sediments. Accumulating evidence indicates that deep and ancient sediments harbor living microbial life, where the flux of nutrients and energy are extremely low. However, their physiology and energy requirements remain largely unknown.
Yuki, Morono, Takeshi, Terada, Manabu, Nishizawa, Motoo, Ito, François, Hillion, Naoto, Takahata, Yuji, Sano, Fumio, Inagaki   +7 more
openaire   +2 more sources