2018 Expedition

Expedition Overview: Cascadia Margin | Nautilus Live

Cascadia Margin

Jun 12, 2018 to Jun 29, 2018 — NA095

The main objectives of this expedition are to explore for methane seeps and hydrate sites and to characterize their associated ecosystems along the U. S. Cascadia Margin. Gas hydrates and gas-filled pockets present in sedimentary deposits provide large reservoirs for methane in the Earth’s crust, and the importance of methane as a potent greenhouse gas has been recognized in recent years. Establishing a baseline by documenting and characterizing these sites is timely because geological events, such as earthquakes or submarine landslides, could result in important environmental impacts due to sudden methane release.

The Cascadia Margin, located offshore Washington, Oregon, and northern California, is of particular interest because high volumes of methane gas and hydrate are stored within this zone. Methane seepage from the Cascadia Margin is widespread, but the number of known sites has dramatically increased in recent years as modern multibeam sonar systems, like the system on E/V Nautilus, have been used to detect methane bubble streams in the water column in addition to collecting seafloor bathymetry and acoustic backscatter. A coordinated water column mapping and data mining effort by our research team in the past two years has resulted in the discovery of over 2700 new bubble streams at over 1000 individual sites on the Cascadia Margin, and this expedition will add to that ongoing research.

Sponsored by: NOAA Office of Exploration and Research

Meet the Team

Photo of Ally Aplin
Ocean Science Intern
Photo of Tamara Baumberger
Science/Data Team
Photo of Nathaniel Buck
Science/Data Team
Photo of Dan Cormany
ROV Pilot
Photo of Rebecca Crawford
Science/Data Team
Photo of Mark DeRoche
Deck Chief
Photo of Oscar Estrada
Video Engineering Intern
Photo of Lindsay Gee
Science/Data Team, Mapping
Photo of Amber Giacone
Video Engineer
Photo of Ethan Gold
Data Engineer
Photo of Michael Hannaford
Hercules Pilot
Photo of Gabrielle Inglis
Argus Pilot
Photo of Renato Kane
Photo of Patrick Madaus
ROV Engineering Intern
Photo of Susan Merle
Science / Data Team
Photo of Marty Momsen
Science Communication Fellow
Photo of Kyle Neumann
Video Engineer
Photo of Savanna Nilsen
Science Communication Fellow
Photo of Nicole Raineault
Expedition Leader
Photo of Kevin Roe
Science/Data Team
Photo of Miles Saunders
Photo of Sarah Seabrook
Science/Data Team
Photo of Jamie Wagner
Science/Data Team
Photo of Robert Waters
Hercules Pilot
Photo of Cassi Weathersbee
Science Communication Fellow
Photo of Camilla Wilkinson
Science/Data Team
Photo of Samantha  Wishnak


Video: Expedition Overview: Cascadia Margin Seeps
Expedition Overview: Cascadia Margin Seeps
June 13, 2018
Video: Cephalopod Week in the Cascadia Margin
Cephalopod Week in the Cascadia Margin
June 21, 2018
Album: Life at Cascadia Margin Methane Seeps
Life at Cascadia Margin Methane Seeps
15 photos
June 26, 2018
Album: Cascadia Margin Sampling Technology
Cascadia Margin Sampling Technology
11 photos
June 27, 2018