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https://www.readbyqxmd.com/read/28546210/release-of-mineral-bound-water-prior-to-subduction-tied-to-shallow-seismogenic-slip-off-sumatra
#1
Andre Hüpers, Marta E Torres, Satoko Owari, Lisa C McNeill, Brandon Dugan, Timothy J Henstock, Kitty L Milliken, Katerina E Petronotis, Jan Backman, Sylvain Bourlange, Farid Chemale, Wenhuang Chen, Tobias A Colson, Marina C G Frederik, Gilles Guèrin, Mari Hamahashi, Brian M House, Tamara N Jeppson, Sarah Kachovich, Abby R Kenigsberg, Mebae Kuranaga, Steffen Kutterolf, Freya L Mitchison, Hideki Mukoyoshi, Nisha Nair, Kevin T Pickering, Hugo F A Pouderoux, Yehua Shan, Insun Song, Paola Vannucchi, Peter J Vrolijk, Tao Yang, Xixi Zhao
Plate-boundary fault rupture during the 2004 Sumatra-Andaman subduction earthquake extended closer to the trench than expected, increasing earthquake and tsunami size. International Ocean Discovery Program Expedition 362 sampled incoming sediments offshore northern Sumatra, revealing recent release of fresh water within the deep sediments. Thermal modeling links this freshening to amorphous silica dehydration driven by rapid burial-induced temperature increases in the past 9 million years. Complete dehydration of silicates is expected before plate subduction, contrasting with prevailing models for subduction seismogenesis calling for fluid production during subduction...
May 26, 2017: Science
https://www.readbyqxmd.com/read/28544999/mercury-bioaccumulation-in-offshore-reef-fishes-from-waters-of-the-southeastern-usa
#2
Wiley Sinkus, Virginia Shervette, Joseph Ballenger, Lou Ann Reed, Craig Plante, Byron White
Mercury (Hg) concentrations and nitrogen (δ(15)N) and carbon (δ(13)C) stable isotopic ratios were measured to assess differences in Hg bioaccumulation in four predatory fish species (Mycteroperca microlepis, Lutjanus campechanus, Caulolatilus microps, and Serioli dumerili) of high commercial and recreational importance in Atlantic waters of the southeastern US. Positive relationships existed between Hg and length, weight, and age, for all species, strongest for M. microlepis and L. campechanus. Intraspecific Hg concentrations also strongly correlated with δ(15)N for all species, and δ(13)C for only L...
May 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28544927/estuarine-sediment-resuspension-and-acidification-release-behaviour-of-contaminants-under-different-oxidation-levels-and-acid-sources
#3
M Camino Martín-Torre, Eva Cifrian, Gema Ruiz, Berta Galán, Javier R Viguri
Carbon dioxide (CO2) Capture and Storage (CCS) is a technology to reduce the emissions of this gas to the atmosphere by sequestering it in geological formations. In the case of offshore storage, unexpected CO2 leakages will acidify the marine environment. Reductions of the pH might be also caused by anthropogenic activities or natural events such as acid spills and dredging operations or storms and floods. Changes in the pH of the marine environment will trigger the mobilisation of elements trapped in contaminated shallow sediments with unclear redox boundary...
May 22, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28541228/transductive-regression-for-data-with-latent-dependence-structure
#4
Nico Gornitz, Luiz Alberto Lima, Luiz Eduardo Varella, Klaus-Robert Muller, Shinichi Nakajima
Analyzing data with latent spatial and/or temporal structure is a challenge for machine learning. In this paper, we propose a novel nonlinear model for studying data with latent dependence structure. It successfully combines the concepts of Markov random fields, transductive learning, and regression, making heavy use of the notion of joint feature maps. Our transductive conditional random field regression model is able to infer the latent states by combining limited labeled data of high precision with unlabeled data containing measurement uncertainty...
May 18, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28536910/development-of-modis-data-based-algorithm-for-retrieving-sea-surface-temperature-in-coastal-waters
#5
Jiao Wang, Zhiqiang Deng
A new algorithm was developed for retrieving sea surface temperature (SST) in coastal waters using satellite remote sensing data from Moderate Resolution Imaging Spectroradiometer (MODIS) aboard Aqua platform. The new SST algorithm was trained using the Artificial Neural Network (ANN) method and tested using 8 years of remote sensing data from MODIS Aqua sensor and in situ sensing data from the US coastal waters in Louisiana, Texas, Florida, California, and New Jersey. The ANN algorithm could be utilized to map SST in both deep offshore and particularly shallow nearshore waters at the high spatial resolution of 1 km, greatly expanding the coverage of remote sensing-based SST data from offshore waters to nearshore waters...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28533985/metabarcoding-monitoring-analysis-the-pros-and-cons-of-using-co-extracted-environmental-dna-and-rna-data-to-assess-offshore-oil-production-impacts-on-benthic-communities
#6
Olivier Laroche, Susanna A Wood, Louis A Tremblay, Gavin Lear, Joanne I Ellis, Xavier Pochon
Sequencing environmental DNA (eDNA) is increasingly being used as an alternative to traditional morphological-based identification to characterize biological assemblages and monitor anthropogenic impacts in marine environments. Most studies only assess eDNA which, compared to eRNA, can persist longer in the environment after cell death. Therefore, eRNA may provide a more immediate census of the environment due to its relatively weaker stability, leading some researchers to advocate for the use of eRNA as an additional, or perhaps superior proxy for portraying ecological changes...
2017: PeerJ
https://www.readbyqxmd.com/read/28532903/trace-metal-pollution-assessment-in-the-surface-sediments-of-nearshore-area-off-calicut-southwest-coast-of-india
#7
Reji Srinivas, R Shynu, M K Sreeraj, K K Ramachandran
Metal concentrations (Al, Cr, Ni, Cu, Zn, and Pb), grain size, and total organic carbon content in 29 surface sediment samples from the nearshore area off Calicut were analyzed to determine their distribution and pollution status. Surface sediments were dominantly silts with low percentage of clay and sand at nearshore and offshore areas. The mean metal concentrations were in the following order: Cr>Ni>Zn>Pb>Cu. The enrichment factor and geo-accumulation index of metals suggest that the surface sediments were not polluted by Zn and moderately polluted by Cu and Ni...
May 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28531121/a-qpcr-based-tool-to-diagnose-the-presence-of-harmful-cyanobacteria-and-cyanotoxins-in-drinking-water-sources
#8
Yi-Ting Chiu, Yi-Hsuan Chen, Ting-Shaun Wang, Hung-Kai Yen, Tsair-Fuh Lin
Harmful cyanobacteria have been an important concern for drinking water quality for quite some time, as they may produce cyanotoxins and odorants. Microcystis and Cylindrospermopsis are two common harmful cyanobacterial genera detected in freshwater lakes and reservoirs, with microcystins (MCs) and cylindrospermopsin (CYN) as their important metabolites, respectively. In this study, two sets of duplex qPCR systems were developed, one for quantifying potentially-toxigenic Microcystis and Microcystis, and the other one for cylindrospermopsin-producing cyanobacteria and Cylindrospermopsis...
May 20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28528417/sea-urchin-embryogenesis-as-bioindicators-of-marine-pollution-in-impact-areas-of-the-sea-of-japan-east-sea-and-the-sea-of-okhotsk
#9
Olga N Lukyanova, Elena V Zhuravel, Denis N Chulchekov, Andrey A Mazur
The embryogenesis of the sea urchin sand dollar Scaphechinus mirabilis was used as bioindicators of seawater quality from the impact areas of the Sea of Japan/East Sea (Peter the Great Bay) and the Sea of Okhotsk (northwestern shelf of Sakhalin Island and western shelf of Kamchatka Peninsula). Fertilization membrane formation, first cleavage, blastula formation, gastrulation, and 2-armed and 4-armed pluteus formation have been analyzed and a number of abnormalities were calculated. Number of embryogenesis anomalies in sand dollar larvae exposed to sea water from different stations in Peter the Great Bay corresponds to pollution level at each area...
May 20, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28527744/abundance-and-composition-of-near-surface-microplastics-and-plastic-debris-in-the-stockholm-archipelago-baltic-sea
#10
Berit Gewert, Martin Ogonowski, Andreas Barth, Matthew MacLeod
We collected plastic debris in the Stockholm Archipelago using a manta trawl, and additionally along a transect in the Baltic Sea from the island of Gotland to Stockholm in a citizen science study. The samples were concentrated by filtration and organic material was digested using hydrogen peroxide. Suspected plastic material was isolated by visual sorting and 59 of these were selected to be characterized with Fourier transform infrared spectroscopy. Polypropylene and polyethylene were the most abundant plastics identified among the samples (53% and 24% respectively)...
May 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28526900/abundance-of-corals-on-offshore-oil-and-gas-platforms-in-the-gulf-of-mexico
#11
Stephan R Kolian, Paul W Sammarco, Scott A Porter
Scleractinian, octocoral, and antipatharian corals have colonized many of the offshore oil and gas platforms in the northern Gulf of Mexico. We surveyed 25 offshore oil and gas platforms for these cnidarians. Few to no corals were detected on inshore, shallow-water structures at <25 m depth; however, the abundance of corals increased, ranging from 14 to 194/m(2), on platforms in waters deeper ≥25 m. The most common coral encountered were Tubastraea coccinea (Scleractinia) and Telesto spp. (Octocorallia)...
May 19, 2017: Environmental Management
https://www.readbyqxmd.com/read/28526196/use-of-a-numerical-simulation-approach-to-improve-the-estimation-of-air-water-exchange-fluxes-of-polycyclic-aromatic-hydrocarbons-in-a-coastal-zone
#12
I-Chien Lai, Chon-Lin Lee, Fung-Chi Ko, Ju-Chieh Lin, Hu-Ching Huang, Ruei-Feng Shiu
The air-water exchange is important for determining the transport, fate, and chemical loading of polycyclic aromatic hydrocarbons (PAHs) in the atmosphere and in aquatic systems. Investigations of PAH air-water exchange are mostly based on observational data obtained using complicated field sampling processes. This study proposes a new approach to improve the estimation of long-term PAH air-water exchange fluxes by using a multivariate regression model to simulate hourly gaseous PAH concentrations. Model performance analysis and the benefits from this approach indicate its effectiveness at improving the flux estimations and at decreasing the field sampling difficulty...
May 16, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28524866/succession-in-the-petroleum-reservoir-microbiome-through-an-oil-field-production-lifecycle
#13
Adrien Vigneron, Eric B Alsop, Bartholomeus P Lomans, Nikos C Kyrpides, Ian M Head, Nicolas Tsesmetzis
Subsurface petroleum reservoirs are an important component of the deep biosphere where indigenous microorganisms live under extreme conditions and in isolation from the Earth's surface for millions of years. However, unlike the bulk of the deep biosphere, the petroleum reservoir deep biosphere is subject to extreme anthropogenic perturbation, with the introduction of new electron acceptors, donors and exogenous microbes during oil exploration and production. Despite the fundamental and practical significance of this perturbation, there has never been a systematic evaluation of the ecological changes that occur over the production lifetime of an active offshore petroleum production system...
May 19, 2017: ISME Journal
https://www.readbyqxmd.com/read/28521388/non-targeted-high-resolution-mass-spectrometry-strategy-for-simultaneous-monitoring-of-xenobiotics-and-endogenous-compounds-in-green-sea-turtles-on-the-great-barrier-reef
#14
Amy L Heffernan, Maria M Gómez-Ramos, Caroline Gaus, Soumini Vijayasarathy, Ian Bell, Christine Hof, Jochen F Mueller, Maria J Gómez-Ramos
Chemical contamination poses a threat to ecosystem, biota and human health, and identifying these hazards is a complex challenge. Traditional hazard identification relies on a priori-defined targets of limited chemical scope, and is generally inappropriate for exploratory studies such as explaining toxicological effects in environmental systems. Here we present a non-target high resolution mass spectrometry environmental monitoring study with multivariate statistical analysis to simultaneously detect biomarkers of exposure (e...
May 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28518005/safety-considerations-for-medical-staff-and-patients-who-fly-over-water-in-a-helicopter-for-work-or-recreation
#15
Christopher J Brooks, Conor V MacDonald
BACKGROUND: Around 25% of people involved in a helicopter accident in water do not survive. From time to time, physicians and their medical staff are required to fly over water in a helicopter to attend one or more seriously ill patients. Many will have had little or no experience of the issues involved if the helicopter has an accident in the water. Also as Family Practitioners, Aeromedical Examiners, and Flight Surgeons, they are asked to provide advice to patients, travel agents, and airline booking agents about whether an overwater helicopter flight is advisable or not...
April 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28515419/new-insights-into-ocean-sunfish-mola-mola-abundance-and-seasonal-distribution-in-the-northeast-atlantic
#16
Patricia Breen, Ana Cañadas, Oliver Ó Cadhla, Mick Mackey, Meike Scheidat, Steve C V Geelhoed, Emer Rogan, Mark Jessopp
The ocean sunfish, Mola mola, is the largest teleost fish in the world. Despite being found in all oceans of the world, little is known about its abundance and factors driving its distribution. In this study we provide the first abundance estimates for sunfish in offshore waters in the northeast Atlantic and the first record of extensive sunfish presence in these waters year-round. Abundance estimates and predictive distributions for sunfish in approximately 300,000 km² of the northeast Atlantic were derived from large scale offshore aerial surveys in 2015-2016 using distance sampling techniques...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28511306/-relationship-of-job-stress-with-job-burnout-and-quality-of-work-life-in-workers-for-offshore-oil-platforms
#17
Y Zhang, X L Liu, T D Wei, Y J Lan
Objective: To evaluate the current status of job burnout and qual ity of work life (QWL) in workers for offshore oil platforms, and to analyze the relationship of job stress with job burnout and QWL and the direct and indirect effects of job stress on QWL. Methods: Cluster random sampling was used to select 382 work-ers for 8 oil platforms of China National Offshore Oil Corporation in October 2015. A self-designed questionnaire was used to collect the individual characteristics of subjects. The Quality of Work Life Scale (QWL7-32) , Occupa-tional Stress Inventory-Revised Edition (OSI-R) , and Maslach Burnout Inventory-General Survey (MBI-GS) were used to investigate the QWL, job stress, and job burnout of subjects...
March 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28506427/italy-introduces-pre-and-post-operation-monitoring-phases-for-offshore-seismic-exploration-activities
#18
C Fossati, B Mussi, R Tizzi, G Pavan, D S Pace
Concern is growing that marine fauna can be affected by noise such as naval sonar, pile driving or geophysical surveys, among others. Literature reports a variety of animal reactions to human noise (from apparently null or negligible to strong). However, conclusive results on its effects on marine mammals at individual and population level are still lacking. In 2015, the Italian Environmental Impact Assessment Commission mandated seismic operators apply a standard scientific protocol comparing marine mammal presence before, during, and after offshore seismic survey...
May 12, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28501963/salinity-driven-decadal-changes-in-phytoplankton-community-in-the-nw-arabian-gulf-of-kuwait
#19
Turki Al-Said, Aws Al-Ghunaim, D V Subba Rao, Faiza Al-Yamani, Kholood Al-Rifaie, Ali Al-Baz
Evaluation of hydrological data obtained between 2000 and 2013 from a time series station in Kuwait Bay (station K6) and an offshore southern location (station 18) off Kuwait showed drastic increase in salinity by 6 units. We tested the hypothesis that increased salinity impacted phytoplankton community characteristics in these semiarid waters. The Arabian Gulf receives seasonal freshwater discharge in the north via Shatt Al-Arab estuary with a peak during March-July. A north to south gradient in the proportion of the freshwater exists between station A in the vicinity of Shatt Al-Arab estuary and station 18 in the southern offshore area...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28499687/erratum-to-air-medical-evacuations-from-the-german-north-sea-wind-farm-bard-offshore-1-traumatic-injuries-acute-diseases-and-rescue-process-times-2011-2013-air-medical-journal-35-2016-216-226
#20
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