Environmental time series measurements in the central Gulf of California - Small vessel instrument adaptation

A number of instruments are being adapted for use off small vessels. These devices will help to implement time series study of coastal biology and sedimentation response to seasonal and interannual climatic change in an area off Guaymas, Mexico. The capabilities include: 1) digitally recorded vertical profiles of conductivity, temperature, oxygen and light transmission 2) collection of a contamination free water sample at depth for calibration and water chemistry 3) collection of a fully integrated water sample from 50 meters to the surface for phytopiankton and nutrients 4) vertical net sampling from 150 meters to the surface for pooplankton estimation 5) moored collection of particle flux at depth 6) measurement of current velocity and direction (see T. Hedricka and J. C. Boyils this volume) 7) collection of an undisturbed surface sediment sample.