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A methane surplus relative to the atmospheric equilibrium is a frequently observed feature of ocean surface water. Despite the common fact that biological processes are responsible for its origin, the formation of methane in aer-obic surface water is still poorly understood. We report on methane production in the central Arctic Ocean, which was exclusively(More)
A system for automatic routing based on an iterative application of Lee's algorithm is presented. An extended cell admissibility is defined for continuous design rules in coarse rectangular grids. Combined hardware and software design strategies are applied towards the definition of data structures and their kernel primitives for automatic routing. The(More)
Numerous mechanical components such as bearings and gears are manufactured from seamless steel tubing, which offers superior mechanical properties. The tube making process oftentimes causes wall thickness variations in a helical pattern along the tube length. Therefore, additional clean-up stock is added to the tube. Process control to reduce this variation(More)
Arctic amplification of global warming has led to increased summer sea ice retreat, which influences gas exchange between the Arctic Ocean and the atmosphere where sea ice previously acted as a physical barrier. Indeed, recently observed enhanced atmospheric methane concentrations in Arctic regions with fractional sea-ice cover point to unexpected feedbacks(More)
Numerous articles have recently reported on gas seepage offshore Svalbard, because the gas emission from these Arctic sediments was thought to result from gas hydrate dissociation, possibly triggered by anthropogenic ocean warming. We report on findings of a much broader seepage area, extending from 74° to 79°, where more than a thousand gas discharge sites(More)
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