1. EGU, CL4.7 Sea Level Rise, Vienna, AT, 8 April 2019
Global glacier mass changes and their contributions to sea-level rise from 1961 to 2016
Zemp, M., Huss, M., Thibert, E., Eckert, N., McNabb, R., Huber, J., Barandun, M., Machguth, H., Nussbaumer, S.U., Gärtner-Roer, I., Thomson, L., Paul, F., Maussion, F., Kutuzov, S., and Cogley, J.G.
Glaciers online:

2. intro data methods results take home
Glaciers distinct from the Greenland & Antarctic Ice Sheets
215,000 glaciers · 158,000 km3 · 0.32 m potential SLE
Farinotti et al. (2019), Nature Geoscience

3. intro data methods results take home
glacier sample ~ 500
The Alps
Kääb et al. (2013)
Photo: M. Zemp

4. intro data methods results take home
TanDEM-X, DLR
Pleiades, CNES Airbus
Cryosat-2, ESA
Graphic: P. Joerg

5. intro data methods results take home
New glacier change assessment
Consolidate glaciological sample
Boost geodetic sample
New method to combine glaciol. and geodetic results
Temporal variability from glaciol. sample
Calibration to geodetic values
Extrapolation to full sample
Uncertainty assessment
Expert workshop
Ibergeregg, CH
14-17 March 2018
Publication for upcoming IPCC reports:
SROCC

6. mzemp ¦ wgms ¦ research ¦ outlook ¦ teaching ¦ summary
Worldwide glacier datasets
Thanks to all glaciologists for sharing their data with the community through the WGMS!
Zemp et al. (2019)

7. intro data methods results take home
Boost the geodetic sample
km2
m a.s.l.
km2
observational samples:
glaciological from 450 glaciers
geodetic from 19,130 glaciers
Zemp et al. (2019)

8. intro data methods results take home
Extraction of temporal variability from glaciol. sample
building on Lliboutry’s linear model J. Glaciol. 1974
Zemp et al. (2019)

9. intro data methods results take home
Calibration to glacier-specific geodetic series
g(t)+z(t)
Zemp et al. (2019)

10. intro data methods results take home
Cumulative glacier mass changes
Glacier mass loss / Area.ch = 9625 x 10^9 t (or: m^3 w.e.) / x 10^6 m^2 = 233 m w.e. or 250 m ice cover over Switzerland (125 m ice cover over Austria, km^2; 30 m ice cover over Germany, km^2)
Zemp et al. (2019)

11. intro data methods results take home
Cumulative glacier mass changes
Zemp et al. (2019)

12. intro data methods results take home
Glacier mass changes rates from
Southern Andes
Alaska
Zemp et al. (2019)
Southern Andes
Alaska

13. intro data methods results take home
Annual glacier contributions to sea-level rise
Global ΔM :
-335 Gt yr-1
about 1 mm SLE yr-1
(3 x remaining ice of the Alps)
Zemp et al. (2019)

14. intro data methods results take home
Main contributions to sea-level budget
Antarctic Ice Sheet
residuals
Greenland Ice Sheet
thermal expansion
glaciers
Glacier data from Zemp et al. (2019), other values from Cazenave et al. (2018), observed GMSLR: 3.5 mm per year

15. intro data methods results take home
Current glacier contributions
to global sea-level rise:
about 1 mm SLE per year
(3x remaining ice of the Alps)
¼ of GMSLR
Today 17:00 in Nature