Cryosphere components in GTOS networks Wilfried Haeberli Geography Department University of Zurich.
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Transcript of Cryosphere components in GTOS networks Wilfried Haeberli Geography Department University of Zurich.
![Page 1: Cryosphere components in GTOS networks Wilfried Haeberli Geography Department University of Zurich.](https://reader035.fdocuments.us/reader035/viewer/2022062620/551b7ff4550346167e8b49bb/html5/thumbnails/1.jpg)
Cryosphere components in GTOS
networks
Wilfried HaeberliGeography Department
University of Zurich
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Global Terrestrial Observing System GTOScryosphere networks
sea ice (GOOS)
GTN-G: glaciers
GTN-P: permafrost
! GTN-S: snow
! GTN-IS: continental ice sheets
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Global Terrestrial Observing System GTOScryosphere networks
sea ice (GOOS)
GTN-G: glaciers
GTN-P: permafrost
! GTN-S: snow
! GTN-IS: continental ice sheets
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flow velocity 13 km/y
flow velocity 7 km/y
Jakobshavn Isbrae
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Ice shelves
• Canadian• Antarctica
1906 Ice Shelf Extent 1906 Ice Shelf Extent (~10,000 km(~10,000 km22))
Eureka
Copland
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Ice shelves
• Canadian• Antarctica
1906 Ice Shelf Extent 1906 Ice Shelf Extent (~10,000 km(~10,000 km22))
2008 Ice Shelf Extent 2008 Ice Shelf Extent (~1000 km(~1000 km22))
Eureka
Copland
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Global Terrestrial Observing System GTOScryosphere networks
sea ice (GOOS)
GTN-G: glaciers
GTN-P: permafrost
! GTN-S: snow
! GTN-IS: continental ice sheets
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Global Glacier Changes: facts and 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
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monitoring principle:
integration of
in-situ measurements, remote sensing and numerical modelling
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time
base inventory
repeat inventory
repeat inventory
fluct
uatio
ns o
f gl
acie
rs
mass balance length change
area/volume/thickness change
spaceglacier inventories
mass balance length change
area/volume/thickness change
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UNEP press release 16.03.2008:
• new record loss: - 1.4 m w.e.
• average loss rate 1980-1999doubled since 2000
• previous record (1998) exceededin 2003, 2004, 2006
• only 1 positive balance (Echaurren)
WGMS 2008
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Zemp et al. (2007)
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Recession of Morteratsch Glacier, Switzerland, between 1985 and 2007.Source: J. Alean, SwissEduc (www.swisseduc.ch) / Glaciers online (www.glaciers-online.net).
2007
1985
Glacier length changes
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DEM-differencing: SRTM - DTM 25
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GlobGlacier
European Space Agency (ESA)GLIMS
Global Land Ice
Measurement from Space
Baffin Island
Paul
glacier inventories/satellite observations
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Glacier distribution around the world
Zemp et al. (2007), based on Dyurgerov and Meier (2005)
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Noetzli 2008
Ellesmere Island, Canadian Arctic
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UN Organisations
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annual report swiss offer gtn-g general assembly nc
Launch of GTN-G website
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New GTN-G meta-data browser
Data layers:
length change mass balance volume change special events glacier maps
WGI
GLIMS
glacier photograph collection
Interactive map interface showing FoG (brown dots), WGI (blue dots) and GLIMS (pink polygons) data
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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
CommitteeProposed actions to be endorsed by GTOS SC
• Agreements on institutional responsibilities and lead structure of IACS