National Oceanic and
Atmospheric Administration
United States Department of Commerce

People

People

Principal Investigators

Dr. Gregory C. Johnson

Oceanographer, PMEL
gregory.c.johnson@noaa.gov

Gregory Johnson is a group co-leader of GOBOP, responsible for Core and Deep Argo at PMEL. A large-scale observational physical oceanographer, he studies the roles of the ocean in climate, including variations of ocean temperature, salinity, and currents, their causes, and effects. When not working he enjoys sailing, painting, and gardening.

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Watercolor self portrait of Gregory C. Johnson

Dr. Andrea J. Fassbender

Research Physical Scientist, PMEL
andrea.j.fassbender@noaa.gov

Andrea Fassbender is a group co-leader of GOBOP, responsible for Biogeochemical Argo at PMEL. As an ocean biogeochemist, she uses observations from autonomous platforms, satellites, and ships, as well as output from earth system models, to study the ocean's role in global climate. During her free time she enjoys playing Co Rec soccer, exploring Seattle neighborhoods, spending time with family and friends, and admiring the Pacific Northwest's moss growing capabilities.

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Headshot of Andrea J. Fassbender

Dr. Zachary K. Erickson

Research Oceanographer, PMEL
zachary.k.erickson@noaa.gov

Zachary Erickson is a group co-leader of GOBOP, responsible for the physical oceanography measurements taken by PMEL as part of GO-SHIP. He is broadly interested in interactions between physical and biological systems, with a focus on carbon export processes. Besides working on ship-based hydrography, he also extensively uses data from floats, gliders, and satellites. When not at a computer or on a boat, he is likely enjoying the outdoors on foot or via bicycle, petting his cat while reading a book, or at a piano bench.

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Headshot of Zachary K. Erickson

Research Scientists

Hartmut Frenzel

Research Scientist, CICOES
hartmut.frenzel@noaa.gov

Hartmut Frenzel is a Research Scientist in GOBOP. He provides data management, software development, and delayed mode quality control for PMEL BGC Argo floats. Outside of work he enjoys bicycling, running, hiking, kayaking, traveling, and photography.

Profile | Google Scholar | ORCID | GitHub | ResearchGate

Hartmut Frenzel posing near water in front of a bridge

Dr. John Lyman

Assistant Researcher, CIMAR
john.lyman@noaa.gov

John Lyman is an Assistant Researcher in GOBOP. He is an oceanographer who is interested in both the dynamics of the ocean and the development of new analysis techniques. John also enjoys snowboarding with his boys, climbing with friends and snorkeling with his wife.

Profile | ORCID | GitHub

John Lyman posing with pink toy horse

Kristy McTaggart

Oceanographer, PMEL
kristene.e.mctaggart@noaa.gov

Kristy McTaggart is a Physical Oceanographer in GOBOP. She is CTD lead for all NOAA GO-SHIP lines, and also performs delayed-mode quality control of PMEL Argo float data. Kristy enjoys foreign travel, photography, hiking, and walks with friends.

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Headshot of Kristy McTaggart

Dr. Elizabeth Steffen

Float Research Coordinator, CIMAR
elizabeth.steffen@noaa.gov

Elizabeth Steffen takes the lead in physical aspects of the floats in GOBOP—testing, shipping, deploying, and in some cases assembling floats. She analyzes their performance in the field in order to improve performance. Away from floats she enjoys the outdoors including anything on or in the water (diving, sailing, swimming, kayaking) and visiting National Parks.

Elizabeth Steffen on deck

Postdocs

Dr. Marin Cornec

Postdoc, UW
marin.cornec@noaa.gov

Marin Cornec is a Postdoctoral Scholar in GOBOP with joint appointments at the University of Washington and NOAA PMEL. He is interested in assessing and quantifying phytoplankton-related biological processes and their implications in the biological carbon pump using a combination of observational data. In his free time, he enjoys hiking, scuba diving, going to movies, and visiting breweries.

ORCID | GitHub | ResearchGate

Marin Cornec in front of docked boats

Dr. Yibin Huang

Postdoc, UCSC
yibin.huang@noaa.gov

Yibin Huang is a Postdoctoral Scholar in GOBOP with joint appointments at the University of California, Santa Cruz and NOAA PMEL. His research interests are centered around biogeochemical cycles in the ocean, with the objective of constraining the mechanism governing the carbon and oxygen cycling in the context of a changing climate. Toward this goal, he combines a wide spectrum of scientific approaches including ship-based incubations, biogeochemical sensor data from autonomous platforms, satellite observations, as well as statistical and biogeochemical modeling. Beyond science, he enjoys swimming, reading and cooking.

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Yibin Huang in the snow

Dr. Hannah Joy-Warren

Postdoc, CICOES
hjoyw@uw.edu

Hannah Joy-Warren is a CICOES Postdoctoral Research Fellow in GOBOP and the Gray Lab in the School of Oceanography at the University of Washington. She is a polar oceanographer studying the role of phytoplankton species composition in carbon flows. She loves biking with her dog, exploring the mountains, doing ceramics, and playing the ukulele.

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Headshot of Hannah Joy-Warren in parka

Dr. Paige Lavin

Postdoc, U. of Maryland
Paige.Lavin@noaa.gov

Paige Lavin is a Postdoctoral Research Associate at the Cooperative Institute for Satellite Earth System Studies (CISESS) at the University of Maryland and NOAA's Laboratory for Satellite Altimetry. She is a Visiting Scientist in GOBOP and received her PhD in Oceanography from the University of Washington in 2021. Paige is a large-scale physical oceanographer who combines in-situ and satellite observations to study ocean heat content and sea level rise, often using machine learning methods. She is currently a member of the NASA Ocean Surface Topography Science Team. In her free time, she enjoys cooking, photography, traveling, and playing sports.

Publons | ORCID | ResearchGate

Headshot of Paige Lavin

Dr. Jonathan Sharp

Postdoc, CICOES
jonathan.sharp@noaa.gov

Jon Sharp is a CICOES Postdoctoral Scholar in GOBOP. He joined the group in 2020 after earning his PhD at the University of South Florida. Jon is primarily focused on marine carbonate chemistry, biogeochemical processes, and pairing oceanographic observations with machine learning techniques to create useful data products. In his free time, Jon enjoys hiking, cooking, and supporting any and all Philadelphia sports teams.

Profile | Google Scholar | ORCID | GitHub | GitHub Pages | ResearchGate

Jonathan Sharp with a float

Dr. Yang Xiang

Postdoc, CICOES
yaxiang@uw.edu

Yang Xiang is a CICOES Postdoctoral Research Fellow in GOBOP and the Quay Lab in the School of Oceanography at the University of Washington. He is a chemical oceanographer studying the composition of marine particles and its roles in the ocean carbon cycle through processes such as scavenging, regeneration, and sinking. In his free time, he enjoys travelling, hiking, watching and playing sports.

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Headshot of Yang Xiang in front of forest

Graduate Students

Mar Arroyo

Graduate Student, UCSC
mcarroyo@ucsc.edu

Mar Arroyo is a PhD Student in GOBOP attending the University of California Santa Cruz. Mar is interested in marine carbonate chemistry and uses a combination of observational and model data to study coastal carbon cycling and ocean acidification. He also enjoys biking, listening to music, and trying new breakfast cereals.

Google Scholar

Mar Arroyo in a field

Nina Buzby

Graduate Student, UW
nbuzby@uw.edu

Nina Buzby is a chemical oceanography Graduate Student in GOBOP and the Gray Lab in the School of Oceanography at the University of Washington. She is interested in the impacts of climate change on biogeochemical cycling and carbon chemistry, and is studying the influence of detection platforms in quantifying primary productivity. Outside of research, Nina enjoys adventuring with her dog, trying out breweries, or cooking and eating spicy foods.

Profile

Headshot of Nina Buzby

Alumni

Researchers

Alexandra Brewer, former JIMAR Float Research Associate at PMEL, now a Forests COI Manager at the Puyallup Watershed Initiative

Chanelle Cadot, former JIMAR Float Research Associate at PMEL, now a Field Engineer at the University of Washington, Applied Physics Laboratory

Postdoctoral Scholars

Dr. Donata Giglio, former JISAO Postdoctoral Scholar at PMEL, now an Assistant Professor at the University of Colorado Boulder

Dr. Marion Meinvielle, former NRC Postdoctoral Scholar at PMEL, present position unknown

Dr. Sunke Schmidtko, former NRC Postdoctoral Scholar at PMEL, now at GEOMAR

Dr. Bernadette Sloyan, former NRC Postdoctoral Scholar at PMEL, now a Chief Research Scientist at CSIRO's Oceans and Atmosphere GEOMAR

Dr. Annie Wong, former NRC postdoctoral researcher and JIMAR assistant researcher at PMEL, now a Senior Research Scientist at the University of Washington

Dr. Hannah Zanowski, former JISAO Postdoctoral Scholar at PMEL, now an Assistant Professor at University of Wisconsin-Madison

Graduate Students

Dr. Paige Lavin, former University of Washington School of Oceanography Graduate Student at PMEL, presently a Postdoctoral Research Associate at University of Maryland-College Park

Dr. Sarah Purkey, former University of Washington School of Oceanography Graduate Student at PMEL, now an Assistant Professor of Oceanography at the Scripps Institution of Oceanography

CDR Amy Wirts, former University of Washington School of Oceanography Graduate Student at PMEL, now at the US Coast Guard

Undergraduate Interns

Abigail Birnbaum, former Hollings Scholarship summer intern at PMEL, now a Graduate Student at Tufts University

Tina Chen, former Hollings Scholarship summer intern at PMEL, present position unknown

Dr. Madeleine Youngs, former Hollings Scholarship Summer Intern at PMEL, now a NOAA Climate and Global Change Postdoctoral Fellow at NYU