Along-Estuary Spatial Variability and Driving Forces

Group 3 - Question A(Christine Cass, Alejandra Sanchez, Marianne Corriveau, Hiromu Ishiyama, Genki

Terauchi, Dubrava Krievskaya, Anna Malek, Sung Yong Kim)

Study Site - Yaquina BayCruise 2 - Aug 20, 2013 (Ebb Tide) Cruise 3 - Aug 21, 2013 (Flood Tide)

Methods

underway flow-through

CTD ADCP

Equipment:

Temperature (ºC)

Ebb Flood

Temperature (ºC)

Salinity (PSU) Ebb Flood

Dissolved Oxygen (ml/l)Ebb Flood

Chlorophyll (mg/m3)Ebb Flood

Outer Bay Trawl Station: Estuarine Species:

- English Sole- Ling cod- Pacific staghorn sculpin- Buffalo sculpin- Penpoint gunnel

Oceanic Species: - Sand Dab, - Sand Lance

Upper Bay Trawl Station:Estuarine Species:

- English Sole- Ling cod- Pacific staghorn sculpin- Buffalo sculpin- Penpoint gunnel

Oceanic Species:- NONE!

Upper Trophic Level Trends

Tides & Currents

Freshwater Influence

What’s Happening Offshore:Sea Surface

Currents

NANOOS, High Frequency Radarhttp://nvs.nanoos.org/HFRadar

What’s Happening Offshore?

Upwelling signature ● High chl● Low temp● High salinity● Low DO

(According to Jane)

What’s Happening Offshore?

Satellite derived Chl-a4 days compositesAug 19-22

47.5 N

41 N

127 W 123 W

ug/L

Back to the Question:What is the along-estuary spatial variability in

physical, biological and chemical properties and what are the driving forces that create these variations?● Mouth of Bay:

○ Higher S, Chl○ Lower T, DO

● Major forces?○ Tidal○ Offshore processes (wind-driven upwelling)

Thank you!!!

Do you have any

questions?