Global Sea Level Observing System (GLOSS) Steering Committee meeting
GLOSS Steering Committee

Meeting

25 - 26 May 2026

Location

International Space Science Institute (ISSI) - Hallestrasse 6,
3012 Bern
Switzerland


Organiser(s) & Staff
Organiser
Staff
Participation

By invitation only.

Global Sea Level Observing System (GLOSS) Steering Committee meeting
Summary

40 years of measuring sea level

Established in 1985 as an intergovernmental programme hosted by the Intergovernmental Oceanographic Commission (IOC) of UNESCO, GLOSS is a core component of the Global Ocean Observing System (GOOS). Its mission is to coordinate a high-quality global network of coastal tide gauges that provide reliable sea level data for research and operational use.

What began as a core network of about 300 stations across more than 90 countries has expanded dramatically. Today, over 2,000 stations operated by national institutions worldwide contribute to GLOSS, supporting applications ranging from climate change assessment and coastal adaptation to tsunami and storm surge early warning, port operations, satellite calibration, and numerical modelling. GLOSS also plays a crucial role in monitoring vertical land motion near tide gauges through benchmark surveys and continuous GNSS measurements, ensuring that sea level trends are accurately interpreted.

The Steering Committee supports the GLOSS Grouf of Experts through:

  • Strategic oversight and drafting of plans.
  • Stakeholder engagement.
  • Technical coordination.
  • Data‑quality harmonisation.
  • Outreach and capacity development.
  • Resource mobilisation.

 

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7 Participants
9 Provisional
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Agenda Documents: 28
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Agenda Documents
Agenda Code Name Updated on Action
Agenda Code Name Updated on Action
1 GLOSS Steering Committee_May_2026_Bern_Prov Timetable_v3 25/05/26
10 Agenda 9-JCB-GBON-GLOSS SC-26May2026-V1 26/05/26
11 CSLT_GLOSS_SC_May2026 26/05/26
12 OCG Update and GLOSS IP 26/05/26
13 Draft - The Global Sea Level Observing System (GLOSS) Implementation Plan 2026-2030 21/05/26
2 Draft - The Global Sea Level Observing System (GLOSS) Implementation Plan 2026-2030 21/05/26
2 IOC/EC-59/3.4.Doc(1) GLOSS Implementation Plan for 2026–2030 and Terms of Reference of the GLOSS Group of Experts 20/05/26
2 Draft GLOSS_Implementation_Plan_2026_2030_Australia_Comments 21/05/26
2 GLOSS Draft GLOSS_Implementation_Plan_2026_2030_GCOS comments 22/05/26
2 Draft GLOSS_Implementation_Plan_2026_2030_FRANCE 25/05/26
2 Draft GLOSS_Implementation_Plan_2026_2030_USA_Comments 22/05/26
2 NOAA Repsonse to GLOSS Draft Plan 22/05/26
2 DRAFT GLOSS_Implementation_Plan_2026-2030_CUBA 24/05/26
2 DRAFT_GLOSS_Implementation_Plan_2026-2030_Phil Woodworth 24/05/26
2 DRAFT_GLOSS_Implementation_Plan_2026-2030_ARGENTINA 25/05/26
2 DRAFT_GLOSS_Implementation_Plan_2026-2030_GERMANY 03/06/26
2 DRAFT_GLOSS_Implementation_Plan_2026-2030_INDIA 03/06/26
2 DRAFT_GLOSS_Implementation_Plan_2026-2030_CHILE 03/06/26
2 DRAFT_GLOSS_Implementation_Plan_2026-2030_Denmark 03/06/26
3 Summary Report of the 18th Session of the IOC Group of Experts on GLOSS (GLOSS-GE-XVIII), Panama, 11-14 March 2025 19/02/26
4 Gloss unified portal 26/05/26
5 Consultation Summary Report _Knowledge, data and science to inform sea level rise risk assessments and decision‑making 22/05/26
5 Draft UN Declaration on Sea Level Rise 22/05/26
6 GLOSS SC and WG Data Archeology activities 25/05/26
7 TIGA Technical Report 21/05/26
7 TIGA_4-07_Action_Survey_proposal_vers4 25/05/26
8 TheGlobalSeaLevelObservingSystem_GLOSS_Merrifieldetal.OceanObs09 25/05/26
9 2026.05.24_JPOST_GLOSS meeting 26/05/26

There are 16 participants associated with Global Sea Level Observing System (GLOSS) Steering Committee meeting , 9 of whom are provisional .

Chair
Name Country
PEREZ GOMEZ Begoña Spain
Members SC
Name Country
BRADSHAW Elizabeth United Kingdom of Great Britain and Northern Ireland
HERNANDEZ Francisco Belgium
MARCOS Marta Spain
MATTHEWS Andrew United Kingdom of Great Britain and Northern Ireland
MERRIFIELD Mark United States of America
MITCHUM Gary United States of America
SEPIC Jadranka Croatia
THOMPSON Philip United States of America
WOODWORTH Philip United Kingdom of Great Britain and Northern Ireland
WOPPELMANN Guy France
Invited
Name Country
GALLAGE Champika Switzerland
HESLOP Emma France
OREIRO Fernando Argentina
POST Joanna France
ZINKANN Ann-Christine United States of America
= Person has confirmed their participation and been approved to participate.
= Person has not yet confirmed their participation.
Participant Stats:
Total Invited: 16
Confirmed: 7
Not confirmed: 9
Unapproved: 0
Not-participating: 0
Rejected: 0
Group(s): GOOS, IOC , TSR .
 Label(s): no labels
Created at 18:37 on 19 May 2026 by Bernardo Aliaga Rossel
Last Updated at 18:17 on 25 May 2026 by Bernardo Aliaga Rossel