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X-WR-CALDESC:Events for geodesy.science - IAG website
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DTSTART;TZID=UTC:20260611T150000
DTEND;TZID=UTC:20260611T160000
DTSTAMP:20260504T195427
CREATED:20260424T132633Z
LAST-MODIFIED:20260424T132633Z
UID:35665-1781190000-1781193600@geodesy.science
SUMMARY:Talks on GIA Seminar
DESCRIPTION:Achraf Koulali (Newcastle University\, UK) and Matt King (University of Tasmania\, Australia) will present: \n“Sensitivity of Antarctic GPS time series to varying surface mass balance loads\, and implications for estimates of Glacial Isostatic Adjustment” \nAntarctic Global Positioning System (GPS) vertical time series exhibit non-linear signals across a wide range of temporal scales\, complicating the interpretation of long-term deformation associated with Glacial Isostatic Adjustment (GIA). One important contributor to these non-linearities is the short-term elastic response of the solid Earth to contemporaneous surface mass balance (SMB) variability. During the first part of this talk\, we will show analysis results of GPS vertical displacement time series from the Transantarctic Mountains (TAM) to quantify the impact of SMB-driven loading on observed crustal motion. SMBL-induced deformation is found to introduce multiyear apparent changes in vertical velocities. After correcting for SMB loading\, most GPS sites exhibit near-zero uplift rates\, with a median velocity of 0.67 mm/yr\, substantially lower than predicted by forward GIA models. We will then discuss these results within the wider context of Antarctica to show the critical role of SMB loading variability in interpreting GPS observations more widely\, with implications for estimates of present-day Antarctic ice mass change. As a second case study\, we will discuss the sensitivity of GPS velocities to SMB variability in a critical sector of East Antarctica\, including in the Denman-Totten glacier region\, suggesting that bedrock motion in that region is broadly of subsidence rather than uplift in contrast to GIA models. Finally\, we will show that modelled SMB variability can be compared with GPS elastic displacements across Antarctica\, as a new form of SMB model validation.
URL:https://geodesy.science/event/talks-on-gia-seminar-6/
CATEGORIES:Commission 3,IACS
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="Joint IAG-IACS Commission on Cryospheric Deformation (Sub-Commission 3.4)":MAILTO:matthias.willen@tu-dresden.de
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20260616
DTEND;VALUE=DATE:20260620
DTSTAMP:20260504T195427
CREATED:20260312T075546Z
LAST-MODIFIED:20260312T075546Z
UID:34152-1781568000-1781913599@geodesy.science
SUMMARY:12 Spanish-Portuguese Assembly of Geodesy & Geophysics
DESCRIPTION:The Spanish-Portuguese Assembly of Geodesy and Geophysics\, which held its first meeting in Almería in 1998\, began meeting every two years\, alternating between the two countries responsible\, Spain and Portugal. Over the course of its sessions\, it has established itself as a research forum in the fields of Geodesy\, Seismology\, Meteorology\, Geomagnetism\, Hydrology\, Oceanography\, Volcanology\, Applied Geophysics\, and Cryospheric Sciences\, as well as a place for meeting and scientific exchange between Spanish and Portuguese researchers through the presentation and discussion of papers in these fields. The COVID-19 period marked the largest gap in the established periodicity\, which we now wish to resume. Thus\, two years after the last meeting\, which took place in Évora in 2024\, the 2026 meeting will be held in Spain. Next June\, from the 16th to the 19th\, Universidad Politécnica de Madrid and its Higher Technical School of Topography\, Geodesy\, and Cartography will host the 12th Spanish-Portuguese Assembly of Geodesy and Geophysics.
URL:https://geodesy.science/event/12-spanish-portuguese-assembly-of-geodesy-geophysics/
LOCATION:ETSI Topografía\, Geodesia y Cartografía\, Mercator Avenue\, Madrid\, 28031\, Spain
CATEGORIES:GGOS,IACS,IAGA,IAHS,IAMAS,IAPSO,IASPEI,IAVCEI,📚 Education & Training
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/ahpgg_2026.jpg
ORGANIZER;CN="CEGG - Comision Espa%C3%B1ola de Geodesia y Geofisica and Politechnical University of Madrid":MAILTO:ahpgg2026@topografia.upm.es
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