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Cryosphere components in GTOS networks

The Global Terrestrial Observing System (GTOS) focuses on the monitoring and understanding of the cryosphere, which includes key components such as glaciers, permafrost, snow, and ice sheets. This system integrates in-situ measurements, remote sensing, and numerical modeling to assess changes in these cryospheric elements. Highlighting the impacts of climate change, GTOS provides essential data on mass balance, length change, and fluctuations in glacier behavior. Research from institutions like the University of Zurich contributes to the ongoing efforts in understanding and mitigating the effects of global warming on our icy regions.

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Cryosphere components in GTOS networks

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  1. Cryosphere components • in GTOS networks Wilfried Haeberli Geography Department University of Zurich

  2. Global Terrestrial Observing System GTOS cryosphere networks • sea ice (GOOS) • GTN-G: glaciers • GTN-P: permafrost • GTN-S: snow • GTN-IS: continental ice sheets

  3. Global Terrestrial Observing System GTOS cryosphere networks • sea ice (GOOS) • GTN-G: glaciers • GTN-P: permafrost • GTN-S: snow • GTN-IS: continental ice sheets

  4. flow velocity 7 km/y flow velocity 13 km/y Jakobshavn Isbrae

  5. Ice shelves • Canadian • Antarctica 1906 Ice Shelf Extent (~10,000 km2) Eureka Copland

  6. Ice shelves • Canadian • Antarctica 1906 Ice Shelf Extent (~10,000 km2) 2008 Ice Shelf Extent (~1000 km2) Eureka Copland

  7. Global Terrestrial Observing System GTOS cryosphere networks • sea ice (GOOS) • GTN-G: glaciers • GTN-P: permafrost • GTN-S: snow • GTN-IS: continental ice sheets

  8. Global Glacier Changes: factsand figures Project management & editing: Michael Zemp, Jaap van Woerden Scientific authors: Michael Zemp, Isabelle Roer, Andreas Kääb, Martin Hoelzle, Frank Paul, Wilfried Haeberli Design, layout, maps & graphics: Diana Rizzolio

  9. monitoring principle: integration of in-situ measurements, remote sensing and numerical modelling

  10. time repeat inventory mass balance length change area/volume/thickness change repeat inventory mass balance length change area/volume/thickness change fluctuations of glaciers base inventory glacier inventories space

  11. WGMS 2008 UNEP press release 16.03.2008: • new record loss: - 1.4 m w.e. • only 1 positive balance (Echaurren) • average loss rate 1980-1999 • doubled since 2000 • previous record (1998) exceeded • in 2003, 2004, 2006

  12. Zemp et al. (2007)

  13. Glacier length changes 1985 2007 Recession of Morteratsch Glacier, Switzerland, between 1985 and 2007. Source: J. Alean, SwissEduc (www.swisseduc.ch) / Glaciers online (www.glaciers-online.net).

  14. DEM-differencing: SRTM - DTM 25

  15. glacier inventories/ satellite observations GlobGlacier European Space Agency (ESA) GLIMS Global Land Ice Measurement from Space Paul Baffin Island

  16. Glacier distribution around the world Zemp et al. (2007), based on Dyurgerov and Meier (2005)

  17. Ellesmere Island, Canadian Arctic Noetzli 2008

  18. UN Organisations

  19. Launch of GTN-G website annual report swiss offer gtn-g general assembly nc

  20. New GTN-G meta-data browser Interactive map interface showing FoG (brown dots), WGI (blue dots) and GLIMS (pink polygons) data • Data layers: • length change • mass balance • volume change • special events • glacier maps • WGI • GLIMS • glacier photograph collection

  21. General cryosphere: • Establishment of GTN-S (snow) and GTN-IS (continental ice sheets) has high priority • how about ice shelves (sea ice/GTNG/GTN-IS) and outlet glaciers (GTN- G/GTN-IS)? • GTN-G: • Future strategy/Recommendations • GTN-G operates with a well established, tiered/integrative monitoring strategy, which should continue and may serve as a model for other GTNs; • Quality ranking should be introduced with respect to in-situ measurements (especially glacier mass balance) • GTN-G representatives are involved in IPCC work and should formally be consulted in the review process for future assessment reports • Questions/guidance/feedbacks from the GTOS SC • GTOS SC to agree with organisational structure and lead responsibility of GTN-G as developed by the partner institutions (WGMS, NSIDC, GLIMS) and IACS/IUGG/ICSU • GTOS SC to transfer the overall responsibility for GTN-G to GTN-G Steering Committee • Proposed actions to be endorsed by GTOS SC • Agreements on institutional responsibilities and lead structure of IACS

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