h March sterdam, GCOS

Transcription

1 h March sterdam, GCOS Science e Confere ence, Am Global Terrestrial Network for Glaciers from a research-based collaboration network towards an operational glacier monitoring Michael Zemp (1), Raup, B.H. (2,3), Paul, F. (1,3), Nussbaumer, S.U. (1), Mölg, N. (1), Machguth, H. (1), Hoelzle, M. (1), Gärtner-Roer, I. (1), Fetterer, F. (2), Armstrong, R. (2) (1) WGMS, (2) NSIDC, (3) GLIMS

2 intro strategy glacier distribution glacier changes conclusions Visualization by P. Rastner Photos by J. Alean Thames Barrier. photo from Wikimedia Commons

3 intro strategy glacier distribution glacier changes conclusions Visualization by P. Rastner How much glacier ice is out there? How (fast) do glaciers change?

4 intro strategy glacier distribution glacier changes conclusions

5 intro strategy glacier distribution glacier changes conclusions Global Terrestrial Network for Glaciers (GTN-G) Steering Committee Advisory Board Executive Board Global Land Ice Measurements from Space World Glacier Monitoring Service US National Snow and Ice Data Center

6 intro strategy glacier distribution glacier changes conclusions Challenges of a research-based monitoring system SCIENCE modelling Too much focused on innovation driven science. Lack of funding for long-term monitoring. in-situ observations remote sensing Limited scientific reproducibility due to non-availability of basic data. MONITORING

7 intro strategy glacier distribution glacier changes conclusions GCOS tiered monitoring i system: GTN-G Gimplementation ti Tier 1: multi-component obs. system across environmental gradients Tier 2: local process understanding and model calibration => extensive energy & mass balance studies Tier 3: regional variability => long-term change series with seasonal/annual resolution Tier 4: regional representativeness of local measurements => decadal change for large samples Tier 5: global coverage => inventories (base & repeat) Haeberli et al. (2000)

8 intro strategy glacier distribution glacier changes conclusions GTN-G G Global Glacier Browser FoG GlaThiDa GPC DOI RGI WGI GLIMS

9 GTN-G G Global Glacier Browser FoG GlaThiDa GPC DOI Glacier Inventories RGI WGI GLIMS

10 Global glacier distribution 200,000 glaciers 700,000 km m potential sea level rise

11 Regions with multi-temporal temporal inventories Repeat inventories: 1850, 1973, 2000, 2003, 2010

12 Regions with different levels of data quality Abramov, KG Fedchenko, TJ

13 Regions (still) without inventory, eg e.g. Antarctic Peninsula

14 Glacier Changes GTN-G G Global Glacier Browser + Length, Area FoG + Volume, Mass GlaThiDa GPC DOI RGI WGI GLIMS

15 Fluctuations of Glaciers database, browser, app FoG (changes in length, area, volume, mass)

16 ¼ of glacier area with change observation unprecedented 21 st century global glacier decline (since observations are available)

17 How (fast) are glaciers changing? Front variations photo by S. Kappeler WGMS (2015)

18 How (fast) are glaciers changing? Glaciological mass balance WGMS (2015)

19 How (fast) are glaciers changing? Geodetic volume change WGMS (2015)

20 Geodetic volume change: great potential for satellite applications Gardelle et al. (2013)

21 Global Terrestrial Network for Glaciers + model example for research-based monitoring + additional support is needed in order to: ++ maintain and extend the in-situ monitoring network ++ tap the full potential of satellite remote sensing Floricioiu, Jaber and Rott (2012)

22 From research to research & operations Horizon