Possibilities of high shoreline amplification and run-up are investigated. A shoreline amplification of magnitude 5·38 and a tsunamigenic (deep water) amplification of magnitude 5·71 are obtained from single waves without analytic or computational difficulties. It is not claimed that these are a maximum, but rather it is conjectured that arbitrarily high run-up and amplification can be obtained provided that the correct initial wave trains are chosen.

No abstract

This paper deals with the transport of neutrally buoyant bottom particles suspended in fluid under the influence of periodic nonlinear surface waves. A comparison is made with existing solitary wave theory, and an explanation is given for discrepancies between theory and data.

During May 1985, a comprehensive GPS and acoustic navigation data set was collected off the Monterey, California coast. Three types of GPS units, a LORAN-C, and a Miniranger operated concurrently with an OCEANO acoustic system to resolve state-of-the-art accuracies for at-sea geodetic positioning. This report details the acoustic system which displayed baseline errors of only ±0.25 m over distances to 2600 m. Unfiltered point-to-point acoustic navigation errors had a standard deviation of ± 1.25 m, which included ship motion errors in addition to surveying errors. Ninety percent of the stations had navigation standard deviations below ±0.75 m The experiment showed that sub-meter acoustic surveying is the state-of-the-art.

A diffusion‐decay process in sediment cores is analyzed in order to determine what time delays can be tolerated between coring and squeezing. The cases considered suggest the advisability of immediate sectioning and pore water removal; relative changes of 15–40% of surface dissolved silica concentrations are predicted for periods of 3 days to 3 weeks after coring.