the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Simulating interactive ice sheets in the multi-resolution AWI-ESM 1.2: A case study using SCOPE 1.0
Paul Gierz
Lars Ackermann
Christian B. Rodehacke
Uta Krebs-Kanzow
Christian Stepanek
Dirk Barbi
Gerrit Lohmann
Abstract. Interactions between the climate and the cryosphere have the potential to induce strong non-linear transitions in the Earth's climate. These interactions influence both the atmospheric circulation, by changing the ice sheet's geometry, as well as the oceanic circulation, by modification of the water mass properties. Furthermore, the waxing and waning of large continental ice sheets influences the global albedo, altering the energy balance of the Earth System and inducing climate-ice sheet feedbacks on a global scale as evident in Pleistocene glacial-interglacial cycles. To date, few fully comprehensive models exist, that do not only contain a coupled atmosphere/land/ocean component, but also consider interactive cryosphere physics. Yet, on glacial-interglacial and tectonic time scales, as well as in the Anthropocene, ice sheets are not in equilibrium with the climate, and prescribed fixed ice sheet representations in the model can principally be only an approximation to reality. Only climate models, that contain interactive ice sheets, can produce simulations of the Earth's climate which include all feedbacks and processes related to atmosphere-land-ocean-ice interactions. Previous fully coupled models were limited either by low spatial resolution or an incomplete representation of ice sheet processes, such as iceberg calving, surface ablation processes, and ocean/ice-shelf interactions. Here, we present the newly developed AWI-Earth System Model (AWI-ESM), which tackles some of these problems. Our modelling toolbox is based on the AWI-climate model, including atmosphere and vegetation components suitable for paleoclimate studies, a multi-resolution global ocean component which can be refined to simulate regions of interest at high resolution, and an ice sheet component suitable for simulating both ice sheet and ice shelf dynamics and thermodynamics. We describe the currently implemented coupling between these components, present first results for the Mid-Holocene and Last Interglacial, and introduce further ideas for scientific applications for both future and past climate states with a focus on the Northern Hemisphere. Finally, we provide an outlook on the potential of such fully coupled Earth System models in improving representation of climate-ice sheet feedbacks in future paleoclimate studies with this model.
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Paul Gierz et al.
Interactive discussion


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RC1: 'review', Anonymous Referee #1, 06 Sep 2020
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RC2: 'Review comments', Anonymous Referee #2, 13 Sep 2020
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AC1: 'Author Response to Review Comments', Paul Gierz, 30 Nov 2020
Interactive discussion


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RC1: 'review', Anonymous Referee #1, 06 Sep 2020
-
RC2: 'Review comments', Anonymous Referee #2, 13 Sep 2020
-
AC1: 'Author Response to Review Comments', Paul Gierz, 30 Nov 2020
Paul Gierz et al.
Paul Gierz et al.
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Cited
3 citations as recorded by crossref.
- PARASO, a circum-Antarctic fully coupled ice-sheet–ocean–sea-ice–atmosphere–land model involving f.ETISh1.7, NEMO3.6, LIM3.6, COSMO5.0 and CLM4.5 C. Pelletier et al. 10.5194/gmd-15-553-2022
- AMOC Recovery in a Multicentennial Scenario Using a Coupled Atmosphere‐Ocean‐Ice Sheet Model L. Ackermann et al. 10.1029/2019GL086810
- The diurnal Energy Balance Model (dEBM): a convenient surface mass balance solution for ice sheets in Earth system modeling U. Krebs-Kanzow et al. 10.5194/tc-15-2295-2021