

1997a
Cruise Description

The first of four seasonal cruises consisted of
one river mile 53 12-hour series, three 30-hour (1
neap, 2 spring) channel contrast series, six flood
and two ebb ETM series, and a downstream series at
Clatsop Spit.

Vessels

The R/V Robert Gordon Sproul, from Scripps
Oceanographic Institute in San Diego, CA, was
utilized for sedimentological, geochemical,
microbial and ecological investigations.

Geophysical investigations in were conducted from
the R/V Clifford Barnes, a research vessel from
the University of Washington's School of
Oceanography in Seattle, WA.

Coding explanation for sampling series:

     Letter Code: U upstream; D downstream; N
     neap tide; S spring tide; E ebb; F flood
     First Digit: Tidal Series
     Second Digit: Sequence in Tidal Series

     Example: U11 refers to the first
     sequence in the first upstream tidal
     series.

Sampling Series  Sampling Series  Dates
                 Locations
     U11         River Mile 53,   5/03/1997 -
                 Beaver Dock      5/04/1997
     S11                          5/04/1997 -
                 North Channel
                                  5/06/1997
     F11                          5/06/1997 -
                 North Channel
                                  5/06/1997
     E11                          5/06/1997 -
                 North Channel
                                  5/06/1997
     F12                          5/07/1997 -
                 South Channel
                                  5/07/1997
     E12                          5/07/1997 -
                 South Channel
                                  5/07/1997
     S12                          5/08/1997 -
                 South Channel
                                  5/09/1997
     F13                          5/10/1997 -
                 North Channel
                                  5/10/1997
     E13         Sand Island      5/11/1997 -
                 Channel          5/11/1997
     D11                          5/11/1997 -
                 Clatsop Spit
                                  5/12/1997
     N11                          5/13/1997 -
                 South Channel
                                  5/14/1997
     U21         River Mile 53,   5/15/1997 -
                 Beaver Dock      5/15/1997






