Results 41 to 50 of about 861 (180)

Coastal Marine Carbon and Air‐Sea Fluxes Quantified From pH Sensors on an Extended AUV Deployment

Journal of Geophysical Research: Oceans, Volume 131, Issue 8, August 2026.
Abstract For the first time, the Autosub Long Range (ALR) completed a fully autonomous, long‐distance (2,000 km) scientific mission, delivering new insight into coastal carbonate dynamics and air‐sea CO2 ${\text{CO}}_{2}$ fluxes. Equipped with a suite of oceanographic sensors, including a Lab‐on‐Chip (LOC) pH sensor and a Sea‐Bird SeaFET pH sensor, the
Emily M. Hammermeister, Cathy Wimart‐Rousseau, Stathys Papadimitriou, Pablo Trucco‐Pignata, Edward Chaney, Robert Templeton, Alexander B. Phillips, Socratis Loucaides   +7 more
wiley   +1 more source

Riverine Biogeochemical Exports From Major Watersheds to the Northwest Patagonian Estuarine Network

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 8, August 2026.
Abstract River discharge considerably influences marine ecosystems through hydrological and biogeochemical drivers. Measuring baseline variability of riverine inputs, and their relation to anthropogenic land‐use impacts and global climate stressors affecting watersheds is therefore crucial for managing coastal marine ecosystems.
Sage Fox, Jorge León‐Muñoz, Brian Reid, Anna Astorga‐Roine, Rodrigo Aguayo, Paulo Moreno‐Meynard, Lydia Blanchet, David E. Butman   +7 more
wiley   +1 more source

Study on Three-Dimentional Vibration Response Characteristics of Drilling String in Deepwater Riserless Drilling

Shiyou jixie, 2022
In deepwater riserless drilling system,drill string in seawater is affected by external ocean load,torque of top rotary table and bottom bit-formation force,so it is prone to vibrate in the three directions of longitudinal,transverse,and torsional,making
Liu Jun, Chen Feiyu, Li Jian, Guo Xiaoqiang   +3 more
doaj  

An experimental approach to assess the combined effects of multiple stressors on a large vertebrate species

Conservation Biology, Volume 40, Issue 4, August 2026.
Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta, Catriona M. Harris, Lori H. Schwacke, Len Thomas, Jason B. Allen, Aaron A. Barleycorn, Marco Casoli, Jonathan Crossman, Laura Aichinger Dias, Laura Engleby, Erin LaBrecque, Jenny A. Litz, Katherine A. McHugh, Patrick J. O. Miller, Michael J. Moore, Theoni Photopoulou, Brian M. Quigley, Cynthia R. Smith, Brandon L. Southall, Todd R. Speakman, Ryan Takeshita, Christina N. Toms, Randall S. Wells, Eric S. Zolman, Peter L. Tyack   +24 more
wiley   +1 more source

Methodology for kick tolerance calculation and well killing in deepwater drilling

Natural Gas Industry B, 2016
Kick tolerance is a key parameter to indicate whether shut-in operation can be carried out safely and a proper well killing method should be chosen in well drilling.
Yequan Jin, Cheng Li, Qian Wu
doaj   +1 more source

Prioritizing Shark, Ray, and Chimaera Conservation in Rapidly Changing Polar Waters

Global Change Biology, Volume 32, Issue 8, August 2026.
Polar sharks, rays, and chimaeras face growing pressures from changing sea‐ice conditions, expanding fisheries, and limited protection. Our assessment highlights where critical habitats occur and how Important Shark and Ray Areas (ISRAs) can support more targeted conservation and fisheries management across the Arctic and Antarctic.
Vanessa B. Bettcher, Amanda Batlle‐Morera, Peter M. Kyne, Ryan Charles, Emiliano García‐Rodríguez, Christoph A. Rohner, Asia O. Armstrong, Margaret O’Leary Amsler, Natalia V. Chernova, Brynn M. Devine, Andrey V. Dolgov, Meghan M. Donovan, Johanna Faure, Brittany Finucci, Jonathan A. D. Fisher, Rachel A. S. Forbes, Kevin J. Hedges, Phil R. Hollyman, Nigel E. Hussey, Romaric Jac, David W. Kulka, Alexei M. Orlov, Clara Péron, Matthias Schaber, Eric Ste‐Marie, Simon Weigmann, Rima W. Jabado   +26 more
wiley   +1 more source

Envelopes for connected operation of the deepwater drilling riser

Petroleum Exploration and Development, 2012
The common critical criterion and nonlinear search method were adopted for the study of connected operation envelopes of deepwater drilling riser and a riser-wellhead-conductor integral finite element model was established.
Shaodong JU, Yuanjiang CHANG, Guoming CHEN, Xiuquan LIU, Liangbin XU, Rongyao WANG   +5 more
doaj   +1 more source

Bacteria-Oil Microaggregates Are an Important Mechanism for Hydrocarbon Degradation in the Marine Water Column

mSystems, 2021
Vast quantities of oil-associated marine snow (MOS) formed in the water column as part of the natural biological response to the Deepwater Horizon drilling accident. Despite the scale of the event, uncertainty remains about the mechanisms controlling MOS
Amanda M. Achberger, Shawn M. Doyle, Makeda I. Mills, Charles P. Holmes, Antonietta Quigg, Jason B. Sylvan   +5 more
doaj   +1 more source

Information Design in Common Value Auction With Moral Hazard: Application to OCS Leasing Auctions

Econometrica, Volume 94, Issue 4, Page 1171-1208, July 2026.
This paper explores the impact of information design on the auctioneer's revenue in the U.S. offshore oil/gas lease auctions where, post‐auction, the winner decides whether to explore the auctioned tract and must pay the government a royalty on its production value.
Anh Nguyen
wiley   +1 more source

Gas kick and lost circulation risk identification method with multi-parameters based on support vector machine for drilling in deep or ultradeep waters

Engineering Science and Technology, an International Journal
In deepwater and ultra-deepwater drilling, formation pressures are complex and the drilling fluid density window is narrow, which makes it prone to well control incidents such as kicks and lost circulation.
Kai Feng, Shujie Liu, Zhiming Yin, Yi-long Xu, Meipeng Ren, Deqiang Tian, Bangtang Yin, Baojiang Sun   +7 more
doaj   +1 more source