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.
Arctic ECRA Workshop
25-26 February 2016
Brussels, Belgium
The fifth Arctic ECRA Workshop will aim to discuss some of the latest scientific progress, review the Arctic ECRA Strategic Paper, and provide feedback to EU-PolarNet regarding their initial list of research priorities. EU-PolarNet is a Horizon 2020 Coordination and Support Action tasked with developing a European Arctic Research Agenda.
The workshop will take place from 13:00 (25 February) until 16:00 (26 February) at the Helmholtz Association.
Please contact the organisers Lars Henrik Smedsrud and Thomas Jung if you wish to give a presentation.
>> Registration here or to one of the organizers
Lars Henrik organises and Eystein plans to go
International Partnerships in Ice Core Sciences
SECOND OPEN SCIENCE CONFERENCE | 7-11 MARCH 2016 | HOBART, AUSTRALIA
Many of the NBI icecore people will participate in this conference. They will present among other things first results from the Renland ice core.
On Thursday, 10.3., at 2pm in RF235 @NBI David Battisti will give a presentation:
“Why was there a Little Ice Age? Quantifying climate forcings and feedbacks in coupled climate simulations of the last millennium”