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Along-Estuary Spatial Variability and Driving Forces

This study explores the along-estuary spatial variability of physical, biological, and chemical properties in Yaquina Bay during two cruises in August 2013, one at ebb tide and the other at flood tide. Utilizing advanced underway flow-through CTD and ADCP equipment, key metrics such as temperature, salinity, dissolved oxygen, and chlorophyll levels were recorded. The study also examines the influence of freshwater, tidal dynamics, and offshore processes like wind-driven upwelling, contributing to the variability of conditions in this vital estuarine ecosystem.

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Along-Estuary Spatial Variability and Driving Forces

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  1. 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)

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

  3. Methods Equipment: underway flow-through CTD ADCP

  4. Temperature (ºC) Temperature (ºC) Ebb Flood

  5. Salinity (PSU) Ebb Flood

  6. Dissolved Oxygen (ml/l) Ebb Flood

  7. Chlorophyll (mg/m3) Ebb Flood

  8. Upper Bay Trawl Station: Estuarine Species: - English Sole - Ling cod - Pacific staghorn sculpin - Buffalo sculpin - Penpoint gunnel Oceanic Species: - NONE! Outer Bay Trawl Station: Estuarine Species: - English Sole - Ling cod - Pacific staghorn sculpin - Buffalo sculpin - Penpoint gunnel Oceanic Species: - Sand Dab, - Sand Lance Upper Trophic Level Trends

  9. Tides & Currents

  10. Freshwater Influence

  11. What’s Happening Offshore: Sea Surface Currents NANOOS, High Frequency Radar http://nvs.nanoos.org/HFRadar

  12. What’s Happening Offshore? Upwelling signature • High chl • Low temp • High salinity • Low DO (According to Jane)

  13. What’s Happening Offshore? 47.5 N ug/L Satellite derived Chl-a 4 days composites Aug 19-22 41 N 127 W 123 W

  14. 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)

  15. Do you have any questions? Thank you!!!

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