shallow water ice profiler News

  • Discovery of an active methane gas system beneath Arctic seabed

    Researchers have discovered a methane gas system beneath the seabed off the west coast of Svalbard in the Arctic that has probably been active since the end of the last ice age, about 15,000 years ago. The methane, much of which is stored in the sediment beneath the seabed as methane hydrate, flows upwards to the seabed surface where it enters the water as plumes of bubbles. Led by Professor ...

  • ASTM D6429 - 99(2011)e1 standard guide for selecting surface geophysical methods

    This guide applies to commonly used surface geophysical methods for those applications listed in Table 1. The rating system used in Table 1 is based upon the ability of each method to produce results under average field conditions when compared to other methods applied to the same application. An “A” rating implies a preferred method and a “B” rating implies an alternate ...


    By ASTM International

  • ASTM D5777 - 00(2011)e1 standard guide for using the seismic refraction method for subsurface investigation

    This guide summarizes the equipment, field procedures, and interpretation methods used for the determination of the depth, thickness and the seismic velocity of subsurface soil and rock or engineered materials, using the seismic refraction method. Measurement of subsurface conditions by the seismic refraction method requires a seismic energy source, trigger cable (or radio link), geophones, ...


    By ASTM International

  • Go big or go home: instrumenting the nearshore

    Leaning over the side of the 22-foot boat and pulling up the first line of temperature sensors, oceanographer Jamie MacMahan described the state of the line as the worst bio-fouling he had ever seen. It was slimy and smelly. One down, 34 more to go. This was only a pilot project, but MacMahan’s mantra of ‘Go big or go home’ meant that more than 300 instruments were attached to ...


    By RBR Ltd.

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you