1990

Cruise Description

The initial research trip of the CRETM-LMER was a 33 day cruise that took place in the autumn, the low-flow period for the Columbia River. Sixteen 30-hour sampling series were planned to represent a wide range of locations and timing in the tidal cycle.


Vessels

1990 was the first of 10 trips aboard the R/V Robert Gordon Sproul, a research vessel from Scripps Oceanographic Institute in San Diego, CA. Our sedimentological, geochemical, microbial and ecological investigations were based on the Sproul.

Geophysical investigations in 1990 were conducted from the M/V Snowgoose.


Coding explanation for sampling series:

Letter Code: U upstream; D downstream; N neap tide; S spring tide
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 52 9/21/1990 - 9/22/1990
D11
River Mile 10-12 9/24/1990 - 9/25/1990
N11
Mid-Estuary, Buoy 39 9/26/1990 - 9/27/1990 
N12
Mid-Estuary, Tongue Point 9/27/1990 - 9/28/1990 
N13
Rice Island, South Pile Marker 9/29/1990 - 9/30/1990  
S11
Mid-Estuary, Buoy 39 10/3/1990 - 10/4/1990 
S12
Mid-Estuary, Buoy 39 10/5/1990 - 10/6/1990 
S13
Mid-Estuary, Buoy 39 10/6/1990 - 10/7/1990 
S14
Between Buoys 44 and 50 10/8/1990 - 10/9/1990
N21
Mid-Estuary, Buoy 43 10/11/1990 - 10/12/1990
N22
Between Buoys 44 and 50 10/12/1990 - 10/13/1990
N23
Mid-Estuary, Buoy 43 10/14/1990 - 10/15/1990
S21
Mid-Estuary, Buoy 39 10/17/1990 - 10/18/1990 
S22
Mid-Estuary, Buoy 39 10/18/1990 - 10/19/1990
S23
Mid-Estuary, Buoy 37 10/20/1990 - 10/21/1990 
U21
River Mile 53, Beaver Dock 10/22/1990 - 10/23/1990