Comprehensive Ice Sheets Gateway “GHub” Helps Address Sea Level Rise
Nationwide Team Encompasses Multiple Agencies to Create Novel Tools
Researchers at the University at Buffalo (UB) recently teamed with colleagues at NASA Goddard Space Flight Center, NASA Jet Propulsion Laboratory, and Tufts University to publish a special issue paper entitled Building a Glaciology Gateway to Unify a Community in the Concurrency and Computation journal. The journal article provides detailed information about the Glaciology Hub known as the GHub science gateway, which is powered by the HUBzero® Platform at the San Diego Supercomputer Center, located at UC San Diego.
“Sea level rise is a grave concern, making ice melt rates an important area of study,” said GHub Co-Principal Investigator (PI) Kristin Poinar, a geology professor at UB. “The Greenland Ice Sheet in particular is melting and calving ice at an alarming rate -- the equivalent of all of the water in Lake Erie every two years. This has raised the global sea level by more than one centimeter over the past twenty years.”
“GHub is a collaboration and analysis space for ice sheet scientists that hosts datasets and modeling workflows - providing access to codes that enable tool building,” explained lead author Jeanette Sperhac, a scientific programmer at UB Center for Computational Research and also co-PI on the project.
GHub's crevasse detection workflow uses high performance computing resources at the University at Buffalo's Center for Computational Research to run a detection algorithm on NASA IceBridge Airborne Topographic Mapper (ATM) data with user-selected parameters. The top pane shows the raw ATM data, the middle shows gridded anomalies, and the bottom pane shows the crevasse features identified by the algorithm. These crevasses affect the flow of the Greenland Ice Sheet into the ocean. Credit: Renette Jones-Ivey, Kristin Poinar, Alek Petty
The workflows mentioned by Sperhac allow for rapid data analysis, ice-sheet model validation and uncertainty quantification, and this helps scientists more completely catalog the ice sheets of Greenland and Antarctica and how they are changing. The information is not only used by researchers but also by education communities, policy makers, and the general public.
“Predicting future ice-sheet change requires a tremendous effort across a range of disciplines in ice-sheet science including expertise in observational data, paleoglaciology ("paleo") data, numerical ice sheet modeling, and widespread use of emerging methodologies for learning from the data, such as machine learning,” said Sperhac. “Fostering collaboration between disciplines has helped us create GHub and we are grateful to the HUBzero team for helping make that happen.”
"A significant bottleneck is slowing progress in understanding ice sheets and sea level rise – it relates to a lack of open communication and knowledge accessibility between the wide range of scientific communities involved,” continued GHub PI Jason Briner, a geology professor at UB. “Ghub is designed to reduce this bottleneck.”
To date, the team has developed eight computational tools (found on the GHub gateway) and hosts the Ice Science Modeling Intercomparison Projects (ISMIP6) dataset, totalling seven terabytes. With over 75 researchers already utilizing the data from GHub to conduct their studies, Sperhac and the team are now working with these users to integrate additional tools with crucial datasets stored at locations such as the National Snow and Ice Data Center.
“We are happy to assist the GHub team in achieving their goals, especially given the critical nature and societal importance of melting ice sheets,” said HUBzero Director Michael Zentner, who is also the director and principal investigator of the Science Gateways Community Institute and director of Sustainable Scientific Software at the San Diego Supercomputer Center. “The multidisciplinary nature of ice sheet science is an ideal case of what the HUBzero platform is designed to support.”
Funding for GHub was provided by the National Science Foundation (2004826).
EarthCube is a community-driven activity sponsored by the National Science Foundation to transform research in the academic geosciences community. EarthCube aims to create a well-connected environment to share data and knowledge in an open, transparent, and inclusive manner, thus accelerating our ability to better understand and predict the Earth’s systems. EarthCube membership is free and open to anyone in the Geosciences, as well as those building platforms to serve the Earth Sciences. The EarthCube Office is led by the San Diego Supercomputer Center (SDSC) on the UC San Diego campus.
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