Future Directions in Seafloor Geodesy 2021 Community Workshop

Final Workshop Report now available

• Full version (35 Mb)

• Small version (5 Mb):

Virtual Workshop Information

• Virtual Platform Site: https://seafloorgeodesy.us2.pathable.com/

• Dates: April 6-7, and 9th, 2021

• Funding: NSF-OCE, with cooperation from NASA-ESI, USGS

This workshop brought together the seafloor geodesy community, including scientists from academic institutions, government agencies, and international partners. The workshop was essential to develop plans for the use of a recently funded pool of GNSS-Acoustic and Bottom Pressure Recorder seafloor geodetic instruments. During the workshop we addressed the current status of existing, the development of emerging, and plans for future technologies in the field. We worked to identify high priority scientific questions and targets for this instrument pool and the community preferred structure for managing the utilization of the instrument pool. The workshop goals were:

Workshop Goals:

1. Identify the active community, and their interest in performing experiments and working with seafloor geodesy data/equipment.

2. Get community feedback on input on interests in seafloor geodetic instrument pool usage, including getting input on preferences for community-versus PI-led projects, and the levels of technical support, need for a facility, and data reduction PI or community users would like.

3. Evaluate possible targets; particularly should community targets dominate discussion.

4. Seek feedback on inclusive and diverse workforce development to grow the community interested in ocean-going seafloor geodetic research.

5. Inform the community of the technologies and seek feedback on the instrument mix or technologies that should be considered for future development for seafloor geodesy. What are the opportunities that can spur innovation in seafloor geodesy?

Agenda:

TUESDAY, APRIL 6

Presentations: Instrument Pool

• Instrument Pool [Newman] - 10 min.

• A GNSS-Acoustic Survey Design Primer [DeSanto] - 10 min.

• Seafloor pressure geodesy: challenges and opportunities [Frederickson] - 10 min.

• Seafloor Geodesy Instrument Pool Commissioning [Zumberg] - 10 min.

Presentations: Previous Experiments and Lessons Learned

• Seafloor Geodesy on the Cascadia Subduction Zone [Schmidt] - 15 min.

• Observations of tectonic strain accumulation and earthquake caused displacement near the trench of the Aleutian Subduction Zone [Webb] - 15 min

• Seafloor cabled tilt and strain observatories capturing shallow slow slip events in the Nankai Trough, Japan [Araki]- 15 min.

• Seafloor geodetic investigations at the Hikurangi subduction zone offshore New Zealand [Wallace]- 15 min.

• Measuring seafloor deformation and tectonic strain build-up with acoustic direct path ranging [Kopp]- 15 min.

• A Brief History of Deformation Measurements at Axial Seamount [Nooner]- 15 min.

Presentations: Commercial/Industry Capabilities and Developments & Wrap up, preview of tomorrow

• Sonardyne’s Seafloor Instruments – Overview & Update - Geraint West (Sonardyne) - 6 min.

• Modular System for Seafloor Geodesy - Jake Sobin (Konsberg) - 6 min.

• Wave Glider Applications in Seafloor Geodesy - Jimmy Board (Liquid Robotics Inc.) - 6 min.

• RBRquartz - a family of bottom pressure recorders and accelerometers for seafloor geodesy - Greg Johnson (RBR) - 6 min.

• Potential Collaborations for Providing Power to the Deep - Scott Jenne (NREL) - 6 min.

WEDNESDAY, APRIL 7

Presentations: Seafloor geodesy science targets

• Seafloor Geodesy Science Target: Megathrust processes [Bartlow] - 10 min.

• Seafloor Geodesy Science Target: Volcanic Processes [Chadwick]- 10 min.

• Earthquake rupture barrier and possible slip on East Pacific Rise transform faults [Liu]- 10 min.

• Capacity & Community-Building in the Field of SAR: Recent Activities, Successes, Challenges, and Lessons Learned [Meyer]- 10 min.

Breakouts 1a-d: Science targets

• Megathrust processes – Session Notes

• Volcanic processes – Session Notes

• Transform faults and rifting processes, plate kinematics – Session Notes

• E&O, diversity, equity, and inclusion – Session Notes

Presentations: Complimentary Techniques and Applications

• Seafloor Geodesy: Hazards Applications and Research [Brooks] - 10 min.

• Reduce ocean noise in seafloor pressure data based upon ocean geostrophic balance [Wei]- 10 min.

• GNSS Positioning in the Marine Domain: Perspectives from the Altimeter Validation Community [Watson]- 10 min.

• An OBSIC Perspective on Operating a Seafloor Geophysical Facility for NSF & OBS Data offload and in-situ clock calibration using optical telemetry [Collins]- 10 min.

Breakouts 2a-d: Complementary Techniques and Applications

• Hazard applications and requirements – Session Notes

• Future technical needs and goals – Session Notes

• Data archiving, dissemination, sharing, and standards – Session Notes

• Complementary techniques and expanded impact – Session Notes

FRIDAY, APRIL 9

Breakout Summaries

• Welcome plan for the day [Foster] - 15 min.

• Report out on Survey results [Newman] - 10 min.

• Breakout Summaries [Session Leads] - 60 min

  • • • 5 min each of 8 groups

      • 20 min discussion

Community Discussion on Pool Utilization Strategy

• Community vs. PI-driven proposals - 30 min - Session Notes

  • • • Live Poll - 5 min

• Targets - 30 min

  • • • Live Poll - 5 min

Plenary Discussion and Draft Workshop Conclusions

• Path forward (largely defined by community input through meeting) - 60 min - Session Notes

  • • • Proposal opportunities (NSF/USGS around for comment?)

      • Workshop needs

      • Writing activities