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Arsenic concentrations measured by graphite-furnace atomic absorption range from <5 to 900 ug/L in groundwater pumped from 6000 wells within a 25 km 2 area of Bangladesh. The proportion of wells that exceed the local standard for drinking water of 50 ug/L arsenic increases with depth from 25% between 8-10 m to 75% between 15-30 m, then declines gradually to(More)
The global distribution of the human population by elevation is quantified here. As of 1994, an estimated 1.88 x 10(9) people, or 33. 5% of the world's population, lived within 100 vertical meters of sea level, but only 15.6% of all inhabited land lies below 100 m elevation. The median person lived at an elevation of 194 m above sea level. Numbers of people(More)
[1] Arsenic concentrations measured by graphite furnace atomic absorption range from < 5 to 900 mg/L in groundwater pumped from 6000 wells within a 25 km 2 area of Bangladesh. The proportion of wells that exceed the Bangladesh standard for drinking water of 50 mg/L arsenic increases with depth from 25% between 8 and 10 m to 75% between 15 and 30 m, then(More)
The Earth's mid-ocean ridges display systematic changes in depth and shape, which subdivide the ridges into discrete spreading segments bounded by transform faults and smaller non-transform offsets of the axis. These morphological changes have been attributed to spatial variations in the supply of magma from the mantle, although the origin of the variations(More)
In recent years, the development of satellite altimetry has opened previously unexplored regions of the world's oceans to exploration by marine geoscientists. By correlating sea surface gravity with seafloor depth, researchers gain insight into the kinematics of seafloor spreading and the physical mechanisms by which the seafloor is formed and deformed.(More)
This paper discusses best practice for collecting seabird bycatch data in pelagic longline observer programs. The paper recognizes that key challenges for WCPFC include: • The levels of observer coverage needed for recording and monitoring bycatch of non-target species such as seabirds, which typically have high variability in CPUE • The need to divide(More)
The stability of Revex, nalmefene hydrochloride injection, has been studied at several temperatures for periods up to 36 months. The data were obtained using a HPLC method for the potency determination, and for the level of the sole degradation product (2,2'-bisnalmefene). These methods were found to be characterized by excellent precision, linearity, and(More)
This paper estimates spatial and temporal overlap between the distribution of North Pacific albatrosses and Western Central Pacific Fisheries Commission (WCPFC) longline fishing effort, highlighting areas and seasons of overlap where there is a higher risk of seabird bycatch. The results highlight the importance of the WCPFC area for all the three albatross(More)
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