caa a22 4500 445814136 CHVBK 20180317145220.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10712-011-9131-5 doi (NATIONALLICENCE)springer-10.1007/s10712-011-9131-5 Response of the Greenland and Antarctic Ice Sheets to Multi-Millennial Greenhouse Warming in the Earth System Model of Intermediate Complexity LOVECLIM [Elektronische Daten] [P. Huybrechts, H. Goelzer, I. Janssens, E. Driesschaert, T. Fichefet, H. Goosse, M.-F. Loutre] Calculations were performed with the Earth system model of intermediate complexity LOVECLIM to study the response of the Greenland and Antarctic ice sheets to sustained multi-millennial greenhouse warming. Use was made of fully dynamic 3D thermomechanical ice-sheet models bidirectionally coupled to an atmosphere and an ocean model. Two 3,000-year experiments were evaluated following forcing scenarios with atmospheric CO2 concentration increased to two and four times the pre-industrial value, and held constant thereafter. In the high concentration scenario the model shows a sustained mean annual warming of up to 10°C in both polar regions. This leads to an almost complete disintegration of the Greenland ice sheet after 3,000years, almost entirely caused by increased surface melting. Significant volume loss of the Antarctic ice sheet takes many centuries to initiate due to the thermal inertia of the Southern Ocean but is equivalent to more than 4m of global sea-level rise by the end of simulation period. By that time, surface conditions along the East Antarctic ice sheet margin take on characteristics of the present-day Greenland ice sheet. West Antarctic ice shelves have thinned considerably from subshelf melting and grounding lines have retreated over distances of several 100km, especially for the Ross ice shelf. In the low concentration scenario, corresponding to a local warming of 3-4°C, polar ice-sheet melting proceeds at a much lower rate. For the first 1,200years, the Antarctic ice sheet is even slightly larger than today on account of increased accumulation rates but contributes positively to sea-level rise after that. The Greenland ice sheet loses mass at a rate equivalent to 35cm of global sea level rise during the first 1,000years increasing to 150cm during the last 1,000years. For both scenarios, ice loss from the Antarctic ice sheet is still accelerating after 3,000years despite a constant greenhouse gas forcing after the first 70-140years of the simulation. The Author(s), 2011 Ice sheets nationallicence Sea-level change nationallicence EMIC nationallicence Ice-climate interactions nationallicence Huybrechts P. Earth System Sciences and Departement Geografie, Vrije Universiteit Brussel, Brussels, Belgium aut Goelzer H. Earth System Sciences and Departement Geografie, Vrije Universiteit Brussel, Brussels, Belgium aut Janssens I. Earth System Sciences and Departement Geografie, Vrije Universiteit Brussel, Brussels, Belgium aut Driesschaert E. Faculty of Sciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut Fichefet T. Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut Goosse H. Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut Loutre M.-F Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut Surveys in Geophysics Springer Netherlands 32/4-5(2011-09-01), 397-416 0169-3298 32:4-5<397 2011 32 10712 https://doi.org/10.1007/s10712-011-9131-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10712-011-9131-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Huybrechts P. Earth System Sciences and Departement Geografie, Vrije Universiteit Brussel, Brussels, Belgium aut NATIONALLICENCE 700 1- Goelzer H. Earth System Sciences and Departement Geografie, Vrije Universiteit Brussel, Brussels, Belgium aut NATIONALLICENCE 700 1- Janssens I. Earth System Sciences and Departement Geografie, Vrije Universiteit Brussel, Brussels, Belgium aut NATIONALLICENCE 700 1- Driesschaert E. Faculty of Sciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut NATIONALLICENCE 700 1- Fichefet T. Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut NATIONALLICENCE 700 1- Goosse H. Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut NATIONALLICENCE 700 1- Loutre M.-F Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium aut NATIONALLICENCE 773 0- Surveys in Geophysics Springer Netherlands 32/4-5(2011-09-01), 397-416 0169-3298 32:4-5<397 2011 32 10712 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer