See invite for the CLIC mini Symposium here
In connection with the CLiC (Climate and Cryosphere, http://www.climate-cryosphere.org/) 12th Scientific Steering Committee at the Niels Bohr Institute February 2-4th a minisymposium will be held in the famous Auditorium A at the Niels Bohr Institute.
Theme: The state of the Arctic Cryosphere
13:00-13:05 Welcome by Dorthe Dahl-Jensen (Professor, Niels Bohr Institute)
13:05-13:20 Morten Skovgaard Olsen (Danish Energy Agency) : Introduction to the update of
SWIPA
13:20-13:40 Jason Box (professor, GEUS): AMAP SWIPA Update: What’s new since 2009 for
Arctic land ice-climate interactions
13:40-14:00 Kristian K. Kjeldsen (Dr., Center of Geogenetics) The use of photos to assess the
Greenland Ice Sheet mass loss
14:00-14:20 Eystein Janson (Director, Bjerkness Center): Ice2Ice and the state of the sea ice
14:20-14:40 James Overland (Dr., NOAA): The Immediacy of Arctic Change
14:40-15:00 Peter L. Langen (Climate scientist, DMI): The Polar Portal and Surface Mass Balance
of the Greenland Ice Sheet
15:00-17:00 Reception with wine and snacks
DMI/NBI Bimonthly meeting to keep updated on ice2ice activities within and between the NBI and DMI groups. Norwegian colleagues are more than welcome.
Agenda:
- Helle: update on Renland CFA data (conductivity, dust, black carbon)
- Vasileios: update on Renland water isotope data
- Iben: Surface mass balance -Renland
- ice2ice general info
- Peter: Contrasting current and projected changes in surface mass balance components across the Greenland Ice Sheet (see abstract below)
- Sindhu: Update on total air content measurements
- Christian: Modeling efforts (if time allows)
In case you forgot to sign up please do so here: http://doodle.com/poll/ves98xr7phwc56su
Contact Helle Kjær.
Peter Langen: Contrasting current and projected changes in surface mass balance components across the Greenland Ice Sheet
Comparison of the last decade’s low surface mass balance (SMB) on the Greenland ice sheet to the changes that are projected for a warming future allows the current mass loss to be placed in a broader perspective. We compare changes in SMB components in HIRHAM5 regional climate model experiments forced by current ERA-Interim reanalysis data and by future projections with the EC-Earth general circulation model. The EC-Earth-forced experiments run over time slices 1991-2010, 2031-2050 and 2081-2100 for both RCP4.5 and RCP8.5.
SMB decreases considerably in the in the last decades of the ERA-Interim experiment. The changes between the early and later part of this experiment are therefore compared to changes in the future scenarios relative to the baseline 1991-2010 EC-Earth-forced experiment.
A major increase in melting and runoff, particularly along the western margin, is common to both the current and projected situations. Over the reanalysis period, accumulation has decreased in many places, particularly in the south. This is linked to the dominant circulation pattern in the last decade and enhances the effect of increased melt and runoff in producing the recent low SMB. In the projections, however, accumulation increases and thereby partially offsets the mass loss. This offset is so efficient that only in the warmest scenario in the latest time slice is the SMB decline significantly stronger than the current one.
Andy Aschwanden from University of Fairbank
16.02.16, 9-12 in room 235@CIC: VISIT, MEETING and WORKSHOP
Visit by Andy Aschwanden, Univ. Alaska, Fairbanks: Seminar on PISM ice flow modelling and workshop
Monday 13:00, Talk@DMI:
Title:Complex Greenland Outlet Glacier Flow Captured
Abstract:The Greenland Ice Sheet is losing mass at an accelerating rate due to increased surface melt and flow acceleration in outlet glaciers. Quantifying future dynamic contributions to sea level requires accurate portrayal of outlet glaciers in ice sheet simulations, but to date, poor knowledge of subglacial topography and limited model resolution have prevented reproduction of complex spatial patterns of outlet flow. Here we combine a high-resolution ice-sheet model coupled to uniformly applied models of subglacial hydrology and basal sliding, and a new subglacial topography data set, to simulate the flow of the Greenland Ice Sheet. Flow patterns of many outlet glaciers are well captured, illustrating fundamental commonalities in outlet glacier flow and highlighting the importance of efforts to map subglacial topography. Success in reproducing present day flow patterns shows the potential for prognostic modelling of ice sheets without the need for spatially varying parameters with uncertain time evolution.