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. To view a slide show demonstrating the temporal changes in salinity, OBS and chlorophyll during ETM events, please click here.
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 Locations	Dates
U11	River Mile 53, Beaver Dock	5/03/1997 - 5/04/1997
S11	North Channel	5/04/1997 - 5/06/1997
F11	North Channel	5/06/1997 - 5/06/1997
E11	North Channel	5/06/1997 - 5/06/1997
F12	South Channel	5/07/1997 - 5/07/1997
E12	South Channel	5/07/1997 - 5/07/1997
S12	South Channel	5/08/1997 - 5/09/1997
F13	North Channel	5/10/1997 - 5/10/1997
E13	Sand Island Channel	5/11/1997 - 5/11/1997
D11	Clatsop Spit	5/11/1997 - 5/12/1997
N11	South Channel	5/13/1997 - 5/14/1997
U21	River Mile 53, Beaver Dock	5/15/1997 - 5/15/1997