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  • 2025 Glacial Isostatic Adjustment workshop: Advancing Models and Observational Constraints

    • Category:
    • Commission 3
    • IACS
    • IASPEI

    Sidney, CA Sidney, Canada
    Commission 3

    We are excited to announce that registration for the “2025 Glacial Isostatic Adjustment workshop: Advancing Models and Observational Constraints” taking place on June 2nd to 6th, 2025, in Sidney (British Columbia, Canada) & online, is now open. To register, please visit our website at https://polenet.org/2025-gia-workshop-registration/. Please note that space is limited by the physical capacity […]

  • “Talks on GIA” seminar

    • Category:
    • Commission 3
    • 📚 Education & Training

    📚 Education & Training

    "Talks on GIA" seminar - Constraining GIA where the mantle is heterogeneous AND Community Priorities for GNSS Measurements We will have two presentations. Erica Lucas (University of California, Santa Cruz, USA) will present "Constraining Glacial Isostatic Adjustment where the mantle is heterogeneous". Terry Wilson (Ohio State University, Columbus, USA) will present "Community Priorities for GNSS […]

  • “Talks on GIA” seminar

    • Category:
    • Commission 3

    Commission 3

    Helio Guerra Neto and Jeff Freymueller from Michigan State University, East Lansing, USA, will present "GIA in the Great Lakes Basin: A Geodetic Perspective on Vertical Motion and Hydrological Loading" Vertical crustal motion in the Great Lakes Basin, North America, results from a combination of ongoing Glacial Isostatic Adjustment (GIA) and environmental and hydrological loadings. […]

  • “Talks on GIA” seminar 3

    • Category:
    • Commission 3

    Commission 3

    Mirjam Bilker-Koivula (Finnish Geospatial Research Institute) and Holger Steffen (Lantmäteriet, Sweden), will present "The Whys and Hows of Dealing with Glacial Isostatic Adjustment in a Mapping Authority" Glacial isostatic adjustment (GIA) affects among others vertical datums, sea-level measurements, GNSS heights, and crustal motion models. Hence, it creates technical and practical challenges for mapping agencies. They […]

  • GNSS-EPOS Webinar, with Dr. Marianne Métois

    • Category:
    • Commission 3

    Commission 3

    We are pleased to invite the GNSS-EPOS community to the inaugural session of our 2026 webinar series, featuring guest speaker Dr. Marianne Métois from the Laboratoire de Géologie de Lyon. Presentation Title: "Tracking very slow deformation of continental Europe with GNSS: challenges and perspectives" Event Details: Date: Monday, 23rd February 2026 Time: 10:00 – 11:00 […]

  • Talks on GIA Seminar

    • Sponsorship/Co-Organised:
    • and PALSEA.
    • SCAR-INSTANT Theme 2
    • Category:
    • Commission 3
    • IACS

    Commission 3

    Paul Tregoning (Australian National University, Canberra, Australia), will present "A tool to assess the accuracy of glacial isostatic adjustment predictions of present-day crustal uplift rates" While there are many global and regional glacial isostatic adjustment (GIA) models available that can be used to compute expected present-day uplift rates of the surface of the Earth, they […]

  • Tracking Mountain Aquifer using Space Geodesy

    • Sponsorship/Co-Organised:
    • IAG
    • Category:
    • Commission 3

    Commission 3

    Tracking Mountain Aquifer Storage and Discharge Using Space Geodesy: Using high-precision GNSS surface displacements, this study quantifies groundwater storage changes in the Sierra Nevada and Cascade ranges. Results show long-term depletion due to droughts but rapid recharge during extreme precipitation events, which can restore and sustain groundwater storage and influence regional water supply and ecosystem resilience.

  • EPOS days 2026

    • Category:
    • Commission 3
    • IAGA
    • IASPEI
    • IAVCEI
    • IGETS
    • IGS
    • 🌐 Other
    • 📚 Education & Training

    Palazzo Doglio hotel conference centre Cagliary, Italy
    📚 Education & Training

    EPOS Days is the flagship annual conference of the European Plate Observing System (EPOS), bringing together researchers, data providers, and infrastructure developers from across Europe to advance collaboration in solid Earth science. The event serves as a key forum to discuss the evolution of EPOS as a pan-European research infrastructure and to showcase progress in […]

  • Hydrologic Signature in Geodetic Observations

    • Sponsorship/Co-Organised:
    • Commission 3
    • IAG
    • WG3.1 Hydrologic Signature in Geodetic Observations
    • Category:
    • Commission 3

    Commission 3

    We announce a seminar by Wenjin Chen on algorithms and software for efficient gravity forward modeling of hydrological mass changes. The talk reviews methods in Cartesian and spherical systems, comparing accuracy and efficiency of modeling approaches, and highlights trade-offs between realism and computation, with applications to hydrological mass change analysis.

  • Talks on GIA Seminar

    • Sponsorship/Co-Organised:
    • PALSEA.
    • SCAR-INSTANT Theme 2
    • Category:
    • Commission 3
    • IACS

    Commission 3

    Allie Coonin (Brown University, Providence, USA) and Tamara Pico (University of California, Santa Cruz, USA) will present: "Transient Earth Rheology Temporarily Slows West Antarctic Ice Retreat in Future Climate Projections" Projections of sea-level change and Antarctic Ice Sheet (AIS) stability under anthropogenic climate change hinge upon accurately describing physical feedbacks that link ice dynamics (marine […]

  • Canceled Hydrologic Signature in Geodetic Observations

    • Sponsorship/Co-Organised:
    • University of Trieste
    • Category:
    • Commission 3

    Commission 3

    We are pleased to announce our third seminar hosted by the IAG Working Group 3.1. Christian Massari will present on hydrologic variability in Europe and beyond using satellites and in situ sensors. The seminar will be held on May 13; further details and the link will be provided later.

  • Talks on GIA Seminar

    • Sponsorship/Co-Organised:
    • PALSEA.
    • SCAR-INSTANT Theme 2
    • Category:
    • Commission 3
    • IACS

    Commission 3

    Achraf Koulali (Newcastle University, UK) and Matt King (University of Tasmania, Australia) will present: "Sensitivity of Antarctic GPS time series to varying surface mass balance loads, and implications for estimates of Glacial Isostatic Adjustment" Antarctic Global Positioning System (GPS) vertical time series exhibit non-linear signals across a wide range of temporal scales, complicating the interpretation […]

  • Talks on GIA Seminar

    • Sponsorship/Co-Organised:
    • PALSEA.
    • SCAR-INSTANT Theme 2
    • Category:
    • Commission 3
    • IACS

    Commission 3

    Here we show that GIA models with realistic 3-D mantle viscosity derived from seismic structures with an effective activation energy of 300–400 kJ/mol and a weak asthenosphere fit paleo-sea level data in North America better than several widely used 1-D GIA models.