Peterson Leads Research Cruise from May 28 - June 07

The research team lead by Chief Scientist, Tawyna Peterson has completed performing experiments aboard the R/V Wecoma.

Tawyna Peterson, Ph.D. Chief Scientist

Purpose

The goals of the research cruise operations:

1. Occupy a grid of stations over the Oregon and Washington continental shelf and slope to measure hydrographic (T, S, pressure), bio-optical (chlorophyll fluorescence, light transmission) and chemical (nitrate, dissolved oxygen) parameters. Combine these data with ADCP measurements of subsurface velocity to explore biophysical interactions.

2. Collect water samples for membrane lipid and DNA- and RNA-based microbial community analyses, primary and secondary production rates and water chemistry studies across environmental gradients in pelagic environments of the Columbia River estuary, the Columbia River plume, the Columbia River at Beaver Army Dock and along established sampling lines along the Oregon and Washington coasts.

3. Collect surface sediments in Columbia River, estuary, plume and at a few sites on coastal lines using a multicorer.

4. Make continuous measurements of surface water chemistry with several devices attached to the continuous flow seawater system.

5. Feature Tracking exercise using the SWAP system and model-based now-cast/forecast system to follow the Columbia River Plume.

Detailed Cruise Plan

Download Cruise Plan (.doc)

Vessel

R/V Wecoma

Equipment List

Standard Ship’s Outfit

a. SeaBird CTD system with transmissometer, fluorometer, PAR, O2, altimeter.
b. SBE Carousel samplers - 12 bottles. 10L bottles
c. RDInstruments shipboard Doppler current profilers; Frequency 75/300 kHz. Dual system required.
d. DAS shipboard data logging/display system
e. Shipboard networking services
f. Winch slip rings - 4-conductor – for CTD
g. Dry Lab tables and cabinets in various heights and sizes
h. Portable refrigerator (15 cu. ft.)
i. Portable chest freezers (2 freezers required, each 7 ft3 )

Transient Equipment

j. Low Temperature freezer (1 available) -85 oC, 5 cu. ft.

Ship’s Deck Equipment

l. Hydro Winch: 0.322” 3-conductor EM for CTD, 1000m max depth.
m. Hydro A-Frame for deploying CTD and Niskin Bottles
n. Gifford block mounted on A-frame
o. Coring Winch: 3/8" wire from the trawl winch for deploying multi corer. 1000m max depth

Vans

t. Storage Van
u. New Radiation Laboratory Van

Scientific Team

Scientist in Charge: Tawnya Peterson (OHSU)
Other Scientists: Carme Huguet (UW), Mariya Smit (OHSU)
Technicians: Mikaela Selby (OHSU), Paul Walczak (OSU), Melissa Rohde (OHSU)
Grad Students: Wiley Evans (OSU), Michael Malpezzi (UMCES)
Observers: Elise Engler (artist)