News
AGU Lightning Talks
Here is an opportunity to hear some of the latest findings and research in the works based on OOI data. Researcher presented their findings in one-minute lightning talks at the AGU Fall Meeting December 12, 2022 during OOIFB’s Town Hall. The presenters are listed by topic and time that they appear on the video. For questions, please don’t hesitate to contact the researchers directly.
- 0:10: Cesar Savage – Woods Hole Oceanographic Institution (virtual)
- 2:16: Artash Nath – MonitorMyOcean.com (virtual)
- 4:00: Karen Bemis – Rutgers, The State University of New Jersey
- 5:45: Ettore Biondi – California Institute of Technology
- 7:46: Amy Bower – Woods Hole Oceanographic Institution
- 11:53: Marine Denolle – University of Washington
- 14:05: Jiaqi Fang – California Institution of Technology
- 15:45: Aleck Wang – Woods Hole Oceanographic Institution
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Alex Wick: Conducting Sea-going Operations
OOI Coastal Endurance Array Deck Lead Alex Wick has been working on ships for more than a decade. He is a classic example of learning the ropes from the bottom up. After receiving a degree in marine biology from the University of Santa Cruz, he took some scuba diving lessons, but really didn’t know what he wanted to do.
Wick started his journey aboard ships in 2012 sorting tools for a marine technician onboard the R/V Point Sur, out of Moss Landing, California. When offered the job, he had no idea what he was getting into. He showed up in shorts, street shoes, with no personal protective gear (PPE) at all, and no at-sea experience.
But he learned quickly and advanced from sorting sockets to needle-gunning the deck, which involves removing all of the old paint with a needle gun before applying a new coat of paint. This activity was when Wick was given his first set of PPE – safety glasses, knee pads, hard hat, and gloves – which gave him a real understanding of their importance during five days of back-breaking work.
[media-caption path="/wp-content/uploads/2023/01/Alex.jpeg" link="#"]Alex Wick has been deck lead for Endurance Operations since 2018. Credit: Darlene Trew Crist ©WHOI.[/media-caption]
Wick started repainting the deck of the boat. The captain, at the time, recognized Wick’s work ethic and dedication and continued to expose him to shipboard duties. From one cruise as a deck hand, he advanced to an 84-day expedition to Antarctica. He jokes that at the time he didn’t even know how to use a ratchet strap, which is widely used to secure heavy equipment on ships and elsewhere.
“The captain told me to secure a small boat under the A-frame,” said Wick. “I had no idea how to do, but figured it out. With one day of oceanographic experience under my belt, I was off to Antarctica.” As it turned out, it was the best possible hands-on learning experience for Wick, which ultimately led to him spending about 500 days at sea and his role with the Endurance Array team today.
“There was nothing like driving a boat in Antarctica with a guy with a crossbow on the bow of the boat directing me around chasing Minke whales,” added Wick. “We would come up alongside one of them, shoot a crossbow bolt into its dorsal fin to retrieve a bio-sample. I thought it was the coolest thing ever.”
This Antarctica expedition provided Wick with the foundational knowledge he now uses aboard the R/V Thomas G. Thompson during bi-annual recovery and deployment expeditions for the Coastal Endurance Array. His time on the Point Sur taught him how to run winches, use the A and J frames, which support the lifting of heavy equipment in and out of the ocean, and most importantly, how to work on a ship in a safe manner.
After Antarctica, Wick spent six years as a deck hand and marine technician, where he developed an innate understanding of how all the pieces move on deck. Jonathan Fram, who often serves as chief scientist for the Endurance expeditions likens Wick to a symphony conductor. “He directs the operations while always having an eye on each member of the ‘orchestra’ and what they should be doing at certain times. This orchestration is critical to getting the heavy equipment we deal with on and off board without incident.”
Wick moved to Oregon State University when his wife was accepted into a PhD program there. He was hired on as a marine technician on the R/V Oceanus, where he sailed for up to 100 days a year. But, a man of many interests, Wick grew tired of being away from home for such long stretches. He missed his family, mountain bike, fishing, and other activities afforded by living in Oregon. He applied for the job as deck lead with the Endurance Array team and has been on the job since December 2018.
His first trip to the dock in Newport after a fall Endurance expedition, where he saw the massive amount of equipment moved on and off the ship and in and out of the water, provided Wick with his leadership philosophy.
“I think that the person running the deck should be basically completely hands off. That way, we are able to actually observe everything and see the bigger picture of what’s happening,” said Wick. “As we’re doing recoveries or deployments, I’m always thinking of the next pieces of the puzzle. I want the folks on the back deck and on the bridge to know what to expect, so everyone knows what’s ahead and can plan for what they’re going to be doing.”
From the seeds of his earliest experience aboard the R/V Point Sur, Wick is totally committed to overseeing a safe operation. “The deck lead is responsible for everyone’s safety and making sure we’re doing things appropriately,” he explained. “Sure unexpected things can happen, but back deck operations can and should be done safely. I feel a great responsibility for making sure that everybody comes back with all their digits and we all return to shore having successfully completed the job and return to our family and friends.”
Wick’s favorite part of the job is working with the team. He joked, “We are all part of the communal suffering. Doing the same thing together. We have a lot of big toys that we get to play with safely. And, it really is special at sea. It’s cool to see the whales breaching, the dolphins racing the ship, the bioluminescence, and skies filled with stars. No matter how crusty and jaded we might be, it takes a team to put these moorings in the water, and deep down, I think we all really enjoy doing this.”
Wick has served as deck lead for six Endurance expeditions and has overseen the movement, deployment and recovery of 270 tons of scientific equipment. Not a bad record for a kid who started out sorting tools.
[media-caption path="/wp-content/uploads/2023/01/Alex-2.jpeg" link="#"]Wick choreographs the recovery and deployment of the Endurance Array moorings. Credit: Darlene Trew Crist ©WHOI. [/media-caption]
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Science Highlights
Researchers from around the globe are using OOI data to identify short-term changes and long-term trends in the changing global ocean.
The Science Highlights included in the report below were compiled from quarterly reports submitted by the Ocean Observatories Initiative to the National Science Foundation from 2020-2022. They represent only a fraction of the scientific findings that are based on OOI data. A complete list of peer-reviewed publications based on OOI data can be found here.
[embed]https://issuu.com/oceanobservatoriesinitiative/docs/ooi_science_highlights_autosaved_.pptx?fr=sNzM0ZjQ2ODUxNTQ[/embed]
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A Visual Report of OOI in 2022
OOI Biogeochemical Sensor Data Best Practices and User Guide: Open Community Review
The Ocean Observatories Initiative (OOI) Biogeochemical (BGC) Sensor Data Best Practices and User Guide is the result of an NSF-funded (OCE2033919) grass-roots community effort to broaden the use of OOI biogeochemical sensor data and increase community capacity to produce analysis-ready data products. The guide includes five chapters: The Introduction (Chapter 1) provides information on the OOI program, including data access, processing, and recommended end user QA/QC relevant to all OOI biogeochemical sensors, and Chapters 2-5 cover the following groups of BGC variables and associated sensors: Dissolved oxygen, nitrate, carbonate chemistry, and bio-optics.
This effort brought together an international group of 39 ocean observing experts, across all career stages, from 19 institutions and 5 countries, each of whom brings expertise on biogeochemical sensors, data analysis and ocean observing infrastructure, as well as research expertise in ocean biogeochemistry. The initial OOI Biogeochemical Sensor Data (OOI BGC) Working Group was formed in July 2021 through an open application process. A three-day virtual meeting in July 2021 launched the Working Group, with consensus-building activities to develop the scope and structure of the Best Practices and User Guide. From July 2021 to June 2022, the Working Group drafted a beta version of the Best Practices and User Guide that went through two rounds of internal review within the Working Group. A draft version of this document was Beta Tested by 14 current and prospective OOI BGC data users, who joined the Working Group members for a 3-day workshop in June 2022 to provide feedback that has since been used in revising and finalizing the document.
The OOI Biogeochemical Sensor Data Best Practices and User Guide is now complete, and has been submitted to the Ocean Best Practices System (OBPS). As a next step, we are seeking to gain GOOS endorsement of the document. In order to do so, the guide must undergo a rigorous community review process whereby comments are publicly invited and adjudicated. We now invite community members to review the guide and submit comments by February 28, 2023. After completing the open review, we will revise the document based on the reviewers’ comments and upload an updated, final version to OBPS.
We encourage feedback from everyone, including both disciplinary experts and users new to each of these sensor types, as well as both experienced and new users of OOI data. Reviewers are welcome to provide feedback on the entire document, or on chapters or sections that are of particular relevance to their interests or expertise.
How to review the OOI BGC Sensor Data Best Practices and User Guide
We are aiming for a transparent and open community review process, and as such, all reviewer comments and responses to them will be public. We invite reviewers to provide feedback on the OOI Biogeochemical Sensor Data Best Practices and User Guide via two different pathways:
- Reviewers may comment directly into a Google Doc version of the guide in the form of comments added to the text. This will be most useful for comments or to suggest revisions on specific sections of the text. We request that reviewers sign in via Google or include their name and email in their comments so that we can identify and, if needed, follow up with individuals providing reviews.
- Reviewers may submit lengthier and/or more overarching comments via an online form. All submissions to this form can be viewed here.
OOI at AGU 2022
[media-caption path="/wp-content/uploads/2020/10/agufront2-scaled-e1603490292321.jpeg" link="#"]OOI will be very much present in person at the AGU Fall Meeting 2022. Come visit us at the OOI booth #1321 in the exhibit hall and mark your calendar for the sessions below. [/media-caption]
This year, OOI will be in person at the AGU Fall Meeting 2022 in Chicago from December 12-16. We will have a booth (#1321) in the exhibit hall and will be in person to present sessions and posters. The following is a compilation of OOI-related presentations at this year’s fall meeting. If we’ve missed any OOI-related sessions, please contact dtrewcrist@whoi.edu and we will be happy to add them. Hope to see you in person this year! Share your AGU news at #AGU22.
Monday, 12 December 2022
08:00 – 09:00 CST(09:00 – 10:00 EST) Online Only
V11B-02 Detecting the syn- and after-eruption process of the Axial Seamount with ambient noise interferometry
Chao J Lee, Nanjing University, Nanjing, China and Youyi Ruan, Brown University, Providence, United States
09:00 – 12:30 CST (10:00 – 13:30 EST) McCormick Place – Poster Hall, Hall – A
V12B-0045 Developing a Catalog of Automated Focal Mechanisms for Microearthquakes at Axial Seamount Based on Waveform Correlation
Maochuan Zhang1, William S D Wilcock1, Felix Waldhauser2, Kaiwen Wang2, David Paul Schaff2, Maya Tolstoy1 , and Yen Joe Tan3, (1)University of Washington, School of Oceanography, Seattle, WA, United States, (2)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (3)Chinese University of Hong Kong, Earth system science, Hong Kong, China
09:16-09:23 CST (10:16-10:23 EST) McCormick Place – N426c
ED12A-03 Accessible Oceans: Exploring Ocean Data Through Sound
Amy S Bower, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Jon Bellona, University of Oregon, School of Music and Dance, Eugene, OR, United States, Jessica Roberts, Georgia Institute of Technology, College of Computing, Atlanta, GA, United States, and Leslie Smith, Your Ocean Consulting, Knoxville, TN, United States
09:43-09:53 CST (10:43-10:53 EST) McCormick Place – S103cd
S12C-05 Listening to Fin Whales with Distributed Acoustic Sensing: A Study in Opportunistic Acoustics
Agatha Podrasky, David Podrasky, Megan Everingham, Noah Clayton, and Thomas Coleman, Silixa LLC, Missoula, MS, United States
15:00-18:00 CST Exhibit Hall – Visit OOI’s Booth #1321
18:30-19:30 CST (19:30-20:30 EST) McCormick Place – S106a Note: Attendance at this event can be either in person or virtual.
TH15B Ocean Observatories Initiative Facility Board (OOIFB) Town Hall
Annette M DeSilva, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States and Kendra L Daly, University of South Florida, College of Marine Science, St. Petersburg, FL, United States
Tuesday, 13 December 2022
08:00 – 09:00 CST (09:00 – 10:00 EST) Online Only
OS21B-09 Centimeter-Scale Mapping of Four Hydrothermal Vent Sites at Axial Seamount: Low-Altitude Surveys Combining Multibeam Sonar, Lidar, and Color Stereo Photography
Jennifer Brophy Paduan1, David W Caress1, Eric J Martin1, Michael Risi1, Chad D Kecy1, Giancarlo Troni2 , and David A Clague1, (1)Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, (2)Monterey Bay Aquarium Research Institute, Watsonville, CA, United States
10:00-18:00 CST Exhibit Hall – Visit OOI’s Booth #1321
14:45 – 18:15 CST (15:45 – 19:15 EST) McCormick Place – Poster Hall, Hall – A
OS25E Process Studies, Educational Activities, and Technological Advancements Using Data and Infrastructure from the Ocean Observatories Initiative (OOI)
James B Edson1, Edward Paul Dever2, Deborah S Kelley3, Albert J Plueddemann1 and Anthony Koppers2, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States(2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States(3)University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States
OS25E-0961 Overview of ambient noise research and outreach with OOI hydrophones
John Ragland, University of Washington Seattle, Seattle, WA, United States, Felix Schwock, University of Washington Seattle Campus, Electrical Engineering, Seattle, WA, United States, Zhaoyu Liu, University of Washington Seattle Campus, Human Centered Design and Engineering, Seattle, WA, United States, and Shima Abadi, University of Washington, School of Oceanography, Seattle, WA, United States
OS25E-0962 Multiyear ocean sound levels at the Northeast Pacific OOI Sites and Beaufort-Sea Arctic recorded using calibrated moored hydrophones
Robert P Dziak1, Samara Haver2, Haru Matsumoto3, Lauren Roche3, Jason Gedamke4, Meghan F Cronin1, Phyllis J Stabeno1 , and William W. Chadwick Jr5, (1)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, (2)NOAA/OSU Cooperative Institute for Marine Resources Studies, Newport, OR, United States, (3)Oregon State University, CIMRS, Newport, OR, United States, (4)NOAA Fisheries, Office of Science and Technology, Silver Spring, MD, United States, (5)CIMERS, Newport, OR United States
OS25E-0963 Neural Implicit Compact Representation to Compress Distributed Acoustic Sensing Data
Yiyu Ni1, Shaowu Pan2, Nathan Kutz2, Bradley Paul Lipovsky1 , and Marine Denolle1, (1)University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, (2)University of Washington, Department of Applied Mathematics, Seattle, WA, United States
OS25E-0964 Multi-Year Study on the Impacts of Assimilating OOI Glider Data on Cross-Shelf Vertical Structure in the Northeast Pacific Ocean
Caitlin Amos, US Naval Research Laboratory Post-Doctoral Scholar, Washington, DC, United States, John J Osborne, US Naval Research Laboratory, Ocean Dynamics and Prediction, Stennis Space Center, MS, United States, and Gregg Arthur Jacobs, US Naval Research Laboratory, Ocean Sciences Division, Stennis Space Center, MS, United States
OS25E-0965 Columbia River Plume Variability in Summer 2022
Edward Paul Dever1, Craig M Risien1, Christopher E Wingard1, Jonathan P Fram1, Parker MacCready2, Piero F Mazzini3, Stuart Pearce1, and Jonathan Whitefield1, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)University of Washington, Olympia, WA, United States, (3)Virginia Institute of Marine Science, Gloucester Point, VA, United States
OS25E-0966 Analysis of AC-S (Spectrophotometer) Proxies for Ecosystem Variables using the OOI Endurance Array off the Coasts of Oregon and Washington
Nicholas Romero, California State University Monterey Bay, Marine Science, Seaside, CA, United States, Christopher E Wingard and Edward Paul Dever, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
OS25E-0967 Seasonal to interannual variability of salinity on the Northeast U.S. continental shelf
Svenja Ryan, Caroline Ummenhofer, and Glen Gawarkiewicz, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
OS25E-0968 Relocation of the OOI Pioneer Array
Albert J Plueddemann, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Derek Buffitt, Woods Hole Oceanographic Institution, Applied Ocean Physics and Engineering, Woods Hole, MA, United States
OS25E-0969 Improvements to the COARE Bulk Flux Algorithm using OOI Surface Flux Data
James B Edson1, Douglas C Vandemark2, Hyodae Seo1, Marc Emond2, Cesar Sauvage1 , and Carol Anne Clayson1, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)University of New Hampshire Main Campus, Durham, NH, United States
OS25E-0970 The Application and Quantification of Systems Engineering Techniques as Applied to the Ocean Observatories Initiative
Matthew Palanza and Paul Matthias, Woods Hole Oceanographic Institution, Applied Ocean Physics and Engineering, Woods Hole, MA, United States
Wednesday, 14 December 2022
10:00-18:00 CST Exhibit Hall – Visit OOI’s Booth #1321
16:15-16:45 CST Exhibit Hall – OOI’s Booth #1321
Q & A about the Relocation of the Coastal Pioneer Array to the Southern Mid-Atlantic Bight. OOI Coastal and Global Scale Nodes Principal Investigator Al Plueddemann will be on hand to answer your questions about plans and progress on the relocation of the Pioneer Array.
Thursday, 15 December 2022
10:00-18:00 CST Exhibit Hall – Visit OOI’s Booth #1321
Friday, 16 December 2022
09:00 – 12:30 CST (10:00 – 13:30 EST) McCormick Place – Poster Hall, Hall – A
S52C-0077 Unraveling the Distribution of Microseism Sources with Submarine Distributed Acoustic Sensing
Jiaqi Fang1, Ethan Williams2, Yan Yang2, Ettore Biondi2 , and Zhongwen Zhan2, (1)California Institute of Technology, Pasadena, CA, United States, (2)California Institute of Technology, Seismological Laboratory, Pasadena, CA United States
10:00-13:00 CST Exhibit Hall – Visit OOI’s Booth #1321
Read MoreRCA and ROPOS: A Long-Term International Collaboration
A Canadian and American team worked side-by-side for 45 days in August in the NE Pacific Ocean during the eighth operations and maintenance expedition for OOI’s Regional Cabled Array (RCA). The team used the Canadian remotely operated vehicle (ROV) ROPOS to conduct maintenance operations on RCA’s underwater cabled observatory spanning the Juan de Fuca Plate and at water depths from 80 m to 2900 m. Intense operations included the recovery and reinstallation of 222 instruments and a 2700 m-tall, two-legged Shallow Profiler Mooring. This expedition took place on the global class research ship the R/V Thomas G. Thompson, operated by the University of Washington (UW). Twenty-six students joined the cruise as part of the UW at-sea experiential learning program called VISIONS.
ROPOS is operated by the Canadian Scientific Submersible Facility (CSSF). The vehicle was specially designed for cabled observatory work, bringing in components from the oil and gas field, and a uniquely designed Remotely Operated Cable Laying system (ROCLS) that allows the vehicle to install extension cables extending for several kilometers on the seafloor. Their work culminated in 2014 during an 83-day cruise onboard the R/V Thompson, which resulted in the installation of >15,000 m of extension cables (in total, ~33,000 m of extension cables was installed on the seafloor), >140 instruments, and platforms on the six-state of-the art moorings with instrumented profiling vehicles. They also installed 18 junction boxes at the key experimental sites using their underbelly latching system that allows the vehicle to directly secure loads up to 4,000 lbs beneath the vehicle. This latching system was adopted by the Deep Submergence Facility ROV Jason, which has conducted multiple RCA maintenance cruises.
[media-caption path="/wp-content/uploads/2022/12/R2209_20220812_091705_launch_ME.Axial-Base_Science-Pod_install-2.jpg" link="#"]The Shallow Profiler Science Pod being deployed with ROPOS during Leg 1 of the RCA 22 cruise at Axial Base. Credit: M. Elend, University of Washington, V22.[/media-caption]
During this latest expedition, ROPOS conducted 60 dives over 33 at-sea days. Keith Tamburri led seven members of the ROPOS team, who worked 12 hours on, 12 hours off for 45 days. Operations are more similar to industry with as little time on deck as possible for the ROV, typically about three hrs before ROPOS reentered the water. Team work is exemplified during ROPOS operations where two pilots each operate a manipulator to conduct complex operations. The ROPOS team was joined in the dive control laboratory by varying members of the RCA’s team, who directed ROPOS activities on the seafloor and throughout the water column, and the VISIONS’22 students who stood 4 hour watches. (A list of ROPOS and RCA team members can be found here).
During this 8th RCA recovery and deployment expedition, the R/V Thompson traveled to all of the RCA sites. ROPOS recovered and redeployed a diverse array of instruments and four small seafloor substations that provide power and communications to instruments on the seafloor and to the instrumented Deep and Shallow profiler moorings. The ROV also was used to install a 500 m long extension cable that allowed bringing the Southern Hydrate Ridge live again. ROPOS also recovered equipment and samples for externally funded principal investigators, including several novel instruments developed by scientists in the US and Germany. ROPOS tasks were many and varied. The vehicle emplaced packages up to 3200 lbs in weight and the pilots skillfully used the manipulators to do everything from scrubbing biofouling off cables to unplugging and plugging in instruments to the seafloor cable
In addition to RCA operations, ROPOS was used to help advance scientific investigations involving instruments added onto the RCA cabled network. For example, as part of an Early Career award to for Dr. Rika Anderson at Carleton College, ROPOS conducted sampling dives using a Universal Fluid Obtainer on the ROPOS porch to sample fluids for follow-on analyses of microbes and viruses. Through another NSF award to Dr. Wilcock and his UW colleague Dana Manalang, ROPOS installed a first of its kind acoustic network on the western and eastern rim of Axial Seamount and within its caldera to examine deformation within the caldera. A suite of CTD instruments were also turned within the caldera to test the hypothesis that brines are emitted from the subsurface associated with submarine eruptions as part of and NSF award to Dr. William Chadwick at the Oregon State University. Lastly, ROPOS inspected a Quantification sonar and recovered an Overview Sonar on Southern Hydrate Ridge as part of a project funded by the German Federal Ministry of Education and Research to MARUM at the University of Bremen, led by investigators Gerhard Bohrmann and Yann Macron. In addition, their 4K high-definition camera was cleaned and a CTD turned. The sonar and camera instruments are another example of an international collaboration.
“Our ROPOS team really enjoys working with the team from the University of Washington, School of Oceanography and Applied Physics Laboratory, who are responsible for the RCA. They are a professional, well-organized, efficient, friendly, and mutually respectful group, which makes these long missions at sea productive, efficient, and successful,” said Keith Shepherd, General Manager, Canadian Scientific Submersible Facility. “And for this cruise, in particular, it was a real pleasure working along with UW undergraduates onboard as part of UW’s at-sea experiential program VISIONS. The students brought a curiosity, enthusiasm, and energy that were always welcome during the long hours in the dive control van.”
Added Kelley, “It really takes a tremendous amount of time, effort, and teamwork to pull off an expedition of this length and complexity. We are grateful to have had the opportunity to work again with our Canadian colleagues. It was an excellent international collaboration to help maintain and expand the capabilities of the RCA. “ Because of the complex nature of the undersea work required to keep the RCA operational, few facilities are trained and equipped to execute such operations.
[media-caption path="/wp-content/uploads/2022/12/ROPOS-ROCLS_IEEE-copy-2.jpg" link="#"]ROPOS with the cable laying system ROCLS attached during the 2014 deployments of the extension cables. Credit: M. Elend, University of Washington, V14.[/media-caption]
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Video Demo about Using QARTOD Flags for OOI data
Woods Hole Oceanographic Senior Research Specialist Stace Beaulieu presents a demonstration on how to explore and visualize data for the Ocean Observatories Initiative (OOI) in Data Explorer, with an emphasis on Quality Assurance of Real-Time Oceanographic Data (QARTOD) flags. In this example, we use QARTOD flags in Data Explorer to rapidly identify a time period of interest and then access those data from ERDDAP.
https://vimeo.com/user110037220/qartod
Read MoreNature Review Paper Reveals New Understandings of Mid-Ocean Ridge Systems
Only a small percentage of the global seafloor has been investigated, leaving the deep ocean as one of the last frontiers to be explored and sampled. Mid-ocean ridges (MOR) systems extend about 60,000 kilometers around the globe, are where 70% of the volcanism on Earth occurs, and are dynamic and active tectonic regions.
A recent Nature Review paper, Früh-Green, et al. 2022, written by a multi-disciplinary team of experts summarizes what is known about MORs, their importance in regulating seawater chemistry and global chemical fluxes, and the diverse ecosystems that they support in the absence of light and under extreme conditions. The authors describe the tectonic, magmatic, and hydrothermal processes that govern how they form and change and describe some of the biogeochemical cycles at varying spreading rates.
“The first hydrothermal vent was discovered in 1977, which was followed by myriad discoveries about these amazing deep-sea environments over the next 45 years,” said OOI’s Regional Cabled Array Principal Investigator, Deborah Kelley at the University of Washington and an author of the paper. “Yet, much remains to be understood about these environments, which play a key role in regulating seawater chemistry and global chemical fluxes. Key unknowns include the evolution of the novel microbial communities that they host and the diversity of viruses. This paper summarizes some of the key discoveries that researchers have made and questions that remain to be answered.”
Among the paper’s key findings are:
- Spreading rates control variations in heat sources, magma input, and tectonic processes along MORs, providing multi-faceted habitats for life.
- Seawater circulation and hydrothermal alteration regulate seawater chemistry and change the composition and physical properties of the lithosphere (crust and upper mantle).
- Roughly 50-60% percent of global MORs are spreading at slow to ultraslow rates resulting in the exposure of lower crustal and upper mantle rocks. This spreading is creating asymmetric ridge segments that support different structures, hydrothermal processes, and vent fluid chemistry.
- Serpentinization decreases density and seismic velocities of mantle rocks, weakening the oceanic lithosphere along faults. Serpentinization also produces hydrogen and organic molecules that provide energy for microbial life.
- Unlike serpentinizing systems, basalt-hosted systems support a vast, hot and diverse microbial biosphere. Advanced technologies are allowing better characterization of the genetic makeup and metabolism of microbes and the role of viruses in shaping biodiversity.
- Hydrothermal processes govern global chemical fluxes of magnesium, iron, manganese, and other volatiles and provide nutrients to the deep ocean. Microbial interactions and oxidation of organic compounds within hydrothermal plumes produce organic carbon.
[media-caption path="/wp-content/uploads/2022/11/Screen-Shot-2022-11-29-at-10.54.32-AM.png" link="#"]Global distribution of hydrothermal vents on the seafloor. Map of the global ridge system with distribution of known sites of hydrothermal venting and sites inferred to be present from water-column studies. Hydrothermal vents occur at MORs (65% of known sites), back-arc spreading centers (22%), submarine arc volcanoes (12%) and interplate hot spot volcanoes (1%). Data from the InterRidge Vents Database. Map adapted with permission from the Center for Environmental Visualization, University of Washington.[/media-caption]
“Ocean observatories like OOI’s Regional Cabled Array and Ocean Networks Canada , are providing researchers unprecedented real-time views into these highly dynamic regions that help form the face of our planet,” added Kelley. “RCA has allowed researchers to measure and monitor activity at the magmatically robust Axial Seamount, on the Juan de Fuca MOR for example, providing insights into when it might next erupt. Such underwater observatories will only continue to advance our knowledge as we expand capabilities to observe, monitor, and sample seafloor environments and the overlying water column in real time with more sophisticated sensors and advanced underwater vehicles and robotic technologies.”
Reference:
Früh-Green, G.L., Kelley, D.S., Lilley, M.D. et al. Diversity of magmatism, hydrothermal processes and microbial interactions at mid-ocean ridges. Nat Rev Earth Environ (2022). https://doi.org/10.1038/s43017-022-00364-y
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Improving Reliability and Availability of Dissolved Oxygen Glider Data
OOI’s Coastal Endurance Array Team is making great strides in ensuring the accuracy of glider dissolved oxygen measurements and making these data readily available to researchers. The team has compared glider oxygen data with independent transects and climatologies compiled by west coast colleagues. They are increasing the number of in situ comparisons of glider oxygen data with bottle samples taken in proximity to the gliders. They have built a benchtop system to do two-point calibrations for oxygen sensors to help ensure their accuracy when the gliders are in the water. And, working with OOI colleagues at WHOI, the team is helping to design and test improved sensor mounts to perform in situ air calibrations of glider oxygen measurements.
“A couple of years ago, Endurance Glider Lead Stuart Pearce developed code to put all of the oxygen data collected by our glider fleet into the DAC, the national central database for glider data,” said Ed Dever, Principal Investigator of the Coastal Endurance Array and Professor at Oregon State University. “Prior to doing this, Stuart examined the data and metadata for any gross errors and issues. That was the first of many steps we have taken to ensure OOI oxygen data are reliable and available so they can be trusted and used by researchers. Our effort is paying off. The glider data available on the DAC are identical to that now available on OOI’s Data Explorer. Endurance glider lines off Newport, OR and Grays Harbor, WA will be the backbone for the northern Californian Current part of the nascent Boundary Ocean Observing Network. The OOI glider lines map seasonal development of hypoxic areas off Oregon and Washington from the coast to the edge of the continental shelf.”
[media-caption path="/wp-content/uploads/2022/11/glider.png" link="#"]More than 137 glider missions have occurred along the Newport and Grays Harbor lines since 2014. Credit: Coastal Endurance Array at OSU.[/media-caption]
Collaborations
Enough oxygen data has been collected and shared in the northeast Pacific that is now possible to make high resolution regional climatologies of temperature, salinity and oxygen. Risien et al. (2022) compiled ~20 years of data taken by Jennifer Fisher (NOAA) and many others, to develop analysis ready transects of water property data off Newport, Oregon. These datasets include both climatologies and individual interpolated, quality-controlled, transect data. The Endurance Team compared glider dissolved oxygen with shipboard CTD samples collected by Fisher along the Newport transect in July 2021. Oxygen measurements from the gliders and CTDs samples compared well and provided confidence that glider and shipboard transects can map hypoxic conditions at comparable resolution and accuracy. Added Dever, “We were able to do a side-by-side comparison of the temperature, salinity, and oxygen data collected by the gliders over our Newport hydrographic line with the CTD data sampled by the Fisher’s team using the R/V Elakha. The comparison was quite good and served to validate the quality of the glider data that are an integral part of the Endurance Array.”
Engineering Solutions
A couple years ago, team member Jonathan Whitefield worked with Scripps Institution for Oceanography to build an oxygen Winkler titration rig so the team can titrate its own oxygen samples. The system can be used both in the lab and onboard to validate glider and moored oxygen data. The titration rig has been used to increase the number bottle samples taken during glider deployments and recoveries and to reduce the time between sample acquisition and analysis.
Building on this, Whitefield and others recently assembled in-house two-point calibration baths for pre- and post deployment of oxygen data collected by gliders and moorings. Calibrations are performed at anoxic and near-saturated conditions. The two-point calibration system is based on a similar one used at Scripps Institution for Oceanography (López-García, P., et al., 2022). A sodium sulfite solution is injected into bottle samples to get the low endpoint oxygen calibration point. The high endpoint oxygen calibration point is achieved using a stirred bath at 10°C to get to near saturation. The high endpoint oxygen is measured with replicate Winkler titrations. The calibration baths better ensure accuracy by making it possible to perform routine in-house checks of vendor calibrations on glider and moored sensors as well as identify calibration drift after deployment.
What’s ahead
Oxygen data are reviewed weekly by operators and annotated. Real-time automated quality control using QARTOD tests is in development. In-situ air calibration tests of oxygen optodes are planned for spring 2023. At the suggestion of outside investigators, OOI’s Coastal and Global Scale Node team at Woods Hole Oceanographic Institution modified Slocum glider optode mounts to allow in-situ air calibrations of dissolved oxygen on the Irminger Sea and Pioneer Arrays. The mount, however, affected the flow around gliders with radome fins and caused navigation problems. Modeling done at WHOI showed these problems may be due to vortices of the optode on the starboard side of the fin. The Endurance gliders will test a new mount placement during its upcoming bi-annual operations and maintenance cruise in March of 2023.
“We’re part of the community of practice for glider oxygen calibration and validation,” said Dever. “We engage with colleagues, adopt standard practices and widely share data. This community of users will help all of us get a better handle on ongoing changes in our ocean regions.”
References
Risien et al. (2022) Spatially gridded cross-shelf hydrographic sections and monthly climatologies from shipboard survey data collected along the Newport Hydrographic Line, 1997–2021, https://doi.org/10.1016/j.dib.2022.107922
López-García, et al. (2022) Ocean Gliders Oxygen SOP, Version 1.0.0. Ocean Gliders, 55pp. DOI: http://dx.doi.org/10.25607/OBP-1756. (GitHub Repository, Ocean Gliders Oxygen SOP.
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