keyword
MENU ▼
Read by QxMD icon Read
search

Offshore

keyword
https://www.readbyqxmd.com/read/28343360/tsunami-run-up-and-inundation-along-the-coast-of-sabah-and-sarawak-malaysia-due-to-a-potential-brunei-submarine-mass-failure
#1
Wai Kiat Tan, Su Yean Teh, Hock Lye Koh
Submarine landslides, also known as submarine mass failures (SMFs), are major natural marine disasters that could critically damage coastal facilities such as nuclear power plants and oil and gas platforms. It is therefore essential to investigate submarine landslides for potential tsunami hazard assessment. Three-dimensional seismic data from offshore Brunei have revealed a giant seabed mass deposited by a previous SMF. The submarine mass extends over 120 km from the continental slope of the Baram Canyon at 200 m water depth to the deep basin floor of the Northwest Borneo Trough...
March 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28336917/acclimation-of-a-low-iron-adapted-ostreococcus-strain-to-iron-limitation-through-cell-biomass-lowering
#2
Hugo Botebol, Gaelle Lelandais, Christophe Six, Emmanuel Lesuisse, Arnaud Meng, Lucie Bittner, Stéphane Lecrom, Robert Sutak, Jean-Claude Lozano, Philippe Schatt, Valérie Vergé, Stéphane Blain, François-Yves Bouget
Iron is an essential micronutrient involved in many biological processes and is often limiting for primary production in large regions of the World Ocean. Metagenomic and physiological studies have identified clades or ecotypes of marine phytoplankton that are specialized in iron depleted ecological niches. Although less studied, eukaryotic picophytoplankton does contribute significantly to primary production and carbon transfer to higher trophic levels. In particular, metagenomic studies of the green picoalga Ostreococcus have revealed the occurrence of two main clades distributed along coast-offshore gradients, suggesting niche partitioning in different nutrient regimes...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336563/complex-multifault-rupture-during-the-2016-mw-7-8-kaik%C3%A5-ura-earthquake-new-zealand
#3
Ian J Hamling, Sigrun Hreinsdóttir, Kate Clark, John Elliott, Cunren Liang, Eric Fielding, Nicola Litchfield, Pilar Villamor, Laura Wallace, Tim J Wright, Elisabetta D'Anastasio, Stephen Bannister, David Burbidge, Paul Denys, Paula Gentle, Jamie Howarth, Christof Mueller, Neville Palmer, Chris Pearson, William Power, Philip Barnes, David J A Barrell, Russ Van Dissen, Robert Langridge, Tim Little, Andrew Nicol, Jarg Pettinga, Julie Rowland, Mark Stirling
On 14th November 2016, the northeastern South Island of New Zealand was struck by a major Mw 7.8 earthquake. Field observations, in conjunction with InSAR, GPS, and seismology reveal this to be one of the most complex earthquakes ever recorded. The rupture propagated northward for more than 170 km along both mapped and unmapped faults, before continuing offshore at its northeastern extent. Geodetic and field observations reveal surface ruptures along at least 12 major faults, including possible slip along the southern Hikurangi subduction interface, extensive uplift along much of the coastline and widespread anelastic deformation including the ~8 m uplift of a fault-bounded block...
March 23, 2017: Science
https://www.readbyqxmd.com/read/28336206/toxic-metal-pollution-in-the-yellow-sea-and-bohai-sea-china-distribution-controlling-factors-and-potential-risk
#4
Cailing Xiao, Huimin Jian, Lufeng Chen, Chang Liu, Huayang Gao, Chuansong Zhang, Shengkang Liang, Yanbin Li
The Bohai Sea (BS) and Yellow Sea (YS), which are adjacent to the most urbanized and industrialized areas in China, are facing a variety of environmental problems. Two cruises were conducted to investigate the pollution status of toxic metals in BS and YS sediments. They generally presented a decreasing trend from near shore to offshore. In addition, two high concentration areas were observed in the central south YS and north of the Shandong Peninsula. The results of multiple regression analyses suggest that Hg is mainly controlled by anthropogenic loading, whereas for Cr, Cu, Ni, Pb and Zn, sediment properties, especially the Fe oxides content, play a more important role...
March 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28332561/inertial-bioluminescence-rhythms-at-the-capo-passero-km3net-italia-site-central-mediterranean-sea
#5
J Aguzzi, E Fanelli, T Ciuffardi, A Schirone, J Craig
In the deep sea, the sense of time is dependent on geophysical fluctuations, such as internal tides and atmospheric-related inertial currents, rather than day-night rhythms. Deep-sea neutrino telescopes instrumented with light detecting Photo-Multiplier Tubes (PMT) can be used to describe the synchronization of bioluminescent activity of abyssopelagic organisms with hydrodynamic cycles. PMT readings at 8 different depths (from 3069 to 3349 m) of the NEMO Phase 2 prototype, deployed offshore Capo Passero (Sicily) at the KM3NeT-Italia site, were used to characterize rhythmic bioluminescence patterns in June 2013, in response to water mass movements...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28316254/plant-protein-based-feeds-and-commercial-feed-enable-isotopic-tracking-of-aquaculture-emissions-into-marine-macrozoobenthic-bioindicator-species
#6
Henrik Kusche, Nicola Hillgruber, Yvonne Rößner, Ulfert Focken
Brittle stars (Ophiura spp.) and other benthic macrofauna were collected in a prospective mariculture area in the North Sea to determine if these taxa could be used as indicator species to track nutrients released from future offshore aquaculture sites. We analysed natural carbon and nitrogen stable isotopic signatures in tissues from macrofauna and compared these to six feed ingredients and four experimental diets made thereof, as well as to a commercial feed with and without lipid and carbonate removal. Our data suggest practicability of using isotopic signatures of Ophiura spp...
March 20, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28303885/major-advance-of-south-georgia-glaciers-during-the-antarctic-cold-reversal-following-extensive-sub-antarctic-glaciation
#7
Alastair G C Graham, Gerhard Kuhn, Ove Meisel, Claus-Dieter Hillenbrand, Dominic A Hodgson, Werner Ehrmann, Lukas Wacker, Paul Wintersteller, Christian Dos Santos Ferreira, Miriam Römer, Duanne White, Gerhard Bohrmann
The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and termination on sub-Antarctic South Georgia in particular. Here, using sea-floor geophysical data and marine sediment cores, we resolve the record of glaciation offshore of South Georgia through the transition from the Last Glacial Maximum to Holocene. We show a sea-bed landform imprint of a shelf-wide last glacial advance and progressive deglaciation. Renewed glacier resurgence in the fjords between c...
March 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28302954/contamination-status-and-accumulation-characteristics-of-heavy-metals-and-arsenic-in-five-seabird-species-from-the-central-bering-sea
#8
Chihiro Ishii, Yoshinori Ikenaka, Shouta M M Nakayama, Hazuki Mizukawa, Yared Beyene Yohannes, Yutaka Watanuki, Masaaki Fukuwaka, Mayumi Ishizuka
Seabirds are marine top predators and accumulate high levels of metals and metalloids in their tissues. Contamination by metals in the highly productive offshore region has become a matter of public concern. It is home to 80% of the seabird population in the USA, 95% of northern fur seals (Callorhinus ursinus), and major populations of Steller sea lions (Eumetopias jubatus), walruses (Odobenus rosmarus) and whales. Here, the concentrations of eight heavy metals (Hg, Cd, Cr, Co, Ni, Cu, Zn and Pb) and a metalloid (As) in the liver and kidneys of the northern fulmar (Fulmarus glacialis), thick-billed murre (Uria lomvia), short-tailed shearwater (Puffinus tenuirostris), tufted puffin (Fratercula cirrhata) and horned puffin (Fratercula corniculata) collected in the Bering Sea were measured...
March 13, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28300282/stable-nitrogen-and-carbon-isotopes-in-sediments-and-biota-from-three-tropical-marine-food-webs-application-to-chemical-bioaccumulation-assessment
#9
Hui Zhang, Yun Teng, Tra Thi Thanh Doan, Yun Wei Yat, Sheot Harn Chan, Barry C Kelly
Studies of trophodynamics and contaminant bioaccumulation in tropical marine ecosystems are limited. This study employed stable isotope and trace contaminant analysis to assess sources of primary productivity, trophic interactions and chemical bioaccumulation behavior in two mangrove food webs and one offshore coastal marine food web in Singapore. Samples of sediment, phytoplankton, mangrove leaves, clams, snails, crabs, worms, prawns, and fishes were analyzed for stable carbon and nitrogen isotope values, as well as concentrations of persistent organic pollutants...
March 16, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28289805/comparison-of-lindane-and-carbaryl-pesticide-bioaccumulation-in-the-common-sole-solea-solea
#10
Frapiccini Emanuela, Scarcella Giuseppe, Guicciardi Stefano, Betti Mattia, Marini Mauro
Organochlorines and carbamates are common pesticides predominantly employed in agriculture. Large amounts of pesticides make their way into rivers and marine habitats. They accumulate in aquatic organisms through different exposure routes and gradually move up the food chain. Since contaminant bioaccumulation in animals is affected by several factors, this work harnessed several different approaches to explore the persistence of lindane, a long banned organochlorine pesticide, and carbaryl, a newer generation pesticide, in common sole (Solea solea), a major commercial species in Adriatic fisheries...
March 13, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28287934/seasonal-patterns-in-eastern-equine-encephalitis-virus-antibody-in-songbirds-in-southern-maine
#11
Susan P Elias, Patrick Keenan, Joan L Kenney, Sara R Morris, Kristen M Covino, Sara Robinson, Kimberly A Foss, Peter W Rand, Charles Lubelczyk, Eleanor H Lacombe, John-Paul Mutebi, David Evers, Robert P Smith
The intent of this study was to assess passerine eastern equine encephalitis virus (EEEv) seroprevalence during the breeding season in southern Maine by testing songbird species identified in the literature as amplifying hosts of this virus. In 2013 and 2014, we collected serum samples from songbirds at a mainland site and an offshore island migratory stopover site, and screened samples for EEEv antibodies using plaque reduction neutralization tests. We compared seasonal changes in EEEv antibody seroprevalence in young (hatched in year of capture) and adult birds at the mainland site, and also compared early season seroprevalence in mainland versus offshore adult birds...
March 13, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28287153/a-significant-net-sink-for-co2-in-tokyo-bay
#12
Atsushi Kubo, Yosaku Maeda, Jota Kanda
Most estuaries and inland waters are significant source for atmospheric CO2 because of input of terrestrial inorganic carbon and mineralization of terrestrially supplied organic carbon. In contrast to most coastal waters, some estuaries with small freshwater discharge are weak source or sometimes sink for CO2. Extensive surveys of pCO2 in Tokyo Bay showed that the overall bay acts as a strong net sink for atmospheric CO2. Although small area was a consistent source for CO2, active photosynthesis driven by nutrient loading from the land overwhelmed the CO2 budget in the bay...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28275740/an-extensive-pockmark-field-on-the-upper-atlantic-margin-of-southeast-brazil-spatial-analysis-and-its-relationship-with-salt-diapirism
#13
Michel Michaelovitch de Mahiques, Uri Schattner, Michael Lazar, Paulo Yukio Gomes Sumida, Luiz Antonio Pereira de Souza
We present new evidence for the existence of a large pockmark field on the continental slope of the Santos Basin, offshore southeast Brazil. A recent high-resolution multibeam bathymetric survey revealed 984 pockmarks across a smooth seabed at water depths of 300-700 m. Four patterns of pockmark arrays were identified in the data: linear, network, concentric, and radial. Interpretation of Two-dimensional multi-channel seismic reflection profiles that crosscut the surveyed area shows numerous salt diapirs in various stages of development (e...
February 2017: Heliyon
https://www.readbyqxmd.com/read/28272520/the-making-of-the-andrea-wave-and-other-rogues
#14
Mark A Donelan, Anne-Karin Magnusson
Unexpectedly large ocean waves or 'rogues' are sometimes claimed to be the cause of damage to ships at sea and to offshore structures. While wind-driven wave models are capable of predicting the average characteristics of waves, the maximum height of rogues that may occur is yet unknown. Rogues form in the open ocean through the addition of elemental wave trains or groups and, infrequently, with many elements coming together in phase, producing rogues. Here we perform directional analyses on one of the steepest rogues ever recorded: the Andrea wave...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28267755/fisheries-impacts-on-china-s-coastal-ecosystems-unmasking-a-pervasive-fishing-down-effect
#15
Cui Liang, Daniel Pauly
Intensive fishing can strongly impact marine ecosystems; among other things, it usually causes the mean trophic level of the catches to decline, an indicator of the occurrence of the 'fishing down' (FD) phenomenon. Although FD occurs throughout the world oceans, it can easily be masked by diverse factors, which has misled authors as to its generality. In this contribution, which uses the East China Sea as an example, we explore the masking effect on FD of the taxonomic coarseness of catch data, of assuming that individual sizes remain constant after intensive fishing, and the geographic expansion of fisheries...
2017: PloS One
https://www.readbyqxmd.com/read/28266529/hydrogen-peroxide-in-deep-waters-from-the-mediterranean-sea-south-atlantic-and-south-pacific-oceans
#16
Mark J Hopwood, Insa Rapp, Christian Schlosser, Eric P Achterberg
Hydrogen peroxide (H2O2) is present ubiquitously in marine surface waters where it is a reactive intermediate in the cycling of many trace elements. Photochemical processes are considered the dominant natural H2O2 source, yet cannot explain nanomolar H2O2 concentrations below the photic zone. Here, we determined the concentration of H2O2 in full depth profiles across three ocean basins (Mediterranean Sea, South Atlantic and South Pacific Oceans). To determine the accuracy of H2O2 measurements in the deep ocean we also re-assessed the contribution of interfering species to 'apparent H2O2', as analysed by the luminol based chemiluminescence technique...
March 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28265513/spatial-distribution-of-environmental-dna-in-a-nearshore-marine-habitat
#17
James L O'Donnell, Ryan P Kelly, Andrew Olaf Shelton, Jameal F Samhouri, Natalie C Lowell, Gregory D Williams
In the face of increasing threats to biodiversity, the advancement of methods for surveying biological communities is a major priority for ecologists. Recent advances in molecular biological technologies have made it possible to detect and sequence DNA from environmental samples (environmental DNA or eDNA); however, eDNA techniques have not yet seen widespread adoption as a routine method for biological surveillance primarily due to gaps in our understanding of the dynamics of eDNA in space and time. In order to identify the effective spatial scale of this approach in a dynamic marine environment, we collected marine surface water samples from transects ranging from the intertidal zone to four kilometers from shore...
2017: PeerJ
https://www.readbyqxmd.com/read/28258775/a-markov-model-for-planning-and-permitting-offshore-wind-energy-a-case-study-of-radio-tracked-terns-in-the-gulf-of-maine-usa
#18
Alexana Cranmer, Jennifer R Smetzer, Linda Welch, Erin Baker
Quantifying and managing the potential adverse wildlife impacts of offshore wind energy is critical for developing offshore wind energy in a sustainable and timely manner, but poses a significant challenge, particularly for small marine birds that are difficult to monitor. We developed a discrete-time Markov model of seabird movement around a colony site parameterized by automated radio telemetry data from common terns (Sterna hirundo) and Arctic terns (S. paradisaea), and derived impact functions that estimate the probability of collision fatality as a function of the distance and bearing of wind turbines from a colony...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28254059/sources-and-distribution-of-sedimentary-organic-matter-along-the-northern-bering-and-chukchi-seas
#19
Fanglu Xu, Haiyan Jin, Zhongqiang Ji, Jianfang Chen, Pei Sun Loh
In this study, lignin-derived phenols were used to determine the sources and distribution of sedimentary organic matter along the northern Bering Sea and Chukchi Sea of the Arctic Ocean. The lignin parameter syringyl/vanillyl (S/V) and cinnamyl/vanillyl (C/V) ratios are used to indicate vegetation sources; and the ratios of vanillic acid/vanillin, (Ad/Al)v and syringic acid/syringaldehyde, (Ad/Al)s are used as indicators of lignin diagenesis. Results showed the predominance of woody gymnosperm signal at the easternmost location in the northern Bering Sea, a mixture of refractory non-woody angiosperm and fresher gymnosperm tissues in the Chukchi Sea, and signal of fresher woody gymnosperm tissues in the northernmost locations in the Chukchi Sea...
February 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28253675/fluctuations-of-the-peak-pressure-level-of-man-made-impulsive-sound-signals-propagating-in-the-ocean
#20
Marta Galindo-Romero, Alexander Gavrilov, Alec J Duncan
The theory of wave propagation and fluctuations in random media has been broadly studied; however the works studying the influence of a changing underwater acoustic environment on the spatial decay and fluctuations of the peak pressure in broadband and impulsive signals are limited. Using a method based on the formulation developed by Dyer and Makris to estimate intensity fluctuations of sound signals in the ocean in conditions of saturated multipath propagation, this paper presents an approach to model peak pressure fluctuations of transient signals propagating underwater...
February 2017: Journal of the Acoustical Society of America
keyword
keyword
77862
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"