Ralph Timmermann
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View article: Impact of Ice Topography, Basal Channels and Subglacial Discharge on Basal Melting Under the Floating Ice Tongue of 79N Glacier, Northeast Greenland
Impact of Ice Topography, Basal Channels and Subglacial Discharge on Basal Melting Under the Floating Ice Tongue of 79N Glacier, Northeast Greenland Open
The floating ice tongue of the 79N Glacier in Northeast Greenland has been thinning over the past two decades, with warning signs of a potential onset of disintegration. While previous studies primarily attribute the thinning of the ice sh…
View article: Simulated density reorganization on the Weddell Sea continental shelf sensitive to atmospheric forcing
Simulated density reorganization on the Weddell Sea continental shelf sensitive to atmospheric forcing Open
The strong Antarctic Slope Front in the southern Weddell Sea limits the present-day transport of modified Warm Deep Water (mWDW) onto the continental shelf and is associated with a characteristic V-shape in the density structure across the…
View article: Results of the second Ice Shelf – Ocean Model Intercomparison Project (ISOMIP+)
Results of the second Ice Shelf – Ocean Model Intercomparison Project (ISOMIP+) Open
Ocean-driven basal melting of Antarctic ice shelves plays an important role in the mass loss of the Antarctic Ice Sheet. Ice shelf cavity-resolving ocean models are a valuable tool for understanding ice shelf-ocean interactions and for sim…
View article: Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 <i>z</i> -coordinate ocean model in an Antarctic domain
Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 <i>z</i> -coordinate ocean model in an Antarctic domain Open
The rate at which the Antarctic ice sheet loses mass is to a large degree controlled by ice–ocean interactions underneath small ice shelves, with the most sensitive regions concentrated in even smaller areas near grounding lines and local …
View article: The system of atmosphere, land, ice and ocean in the region near the 79N Glacier in northeast Greenland: synthesis and key findings from the Greenland Ice Sheet–Ocean Interaction (GROCE) experiment
The system of atmosphere, land, ice and ocean in the region near the 79N Glacier in northeast Greenland: synthesis and key findings from the Greenland Ice Sheet–Ocean Interaction (GROCE) experiment Open
The Greenland Ice Sheet has steadily lost mass over the past decades, presently representing the second-largest single contributor to global sea-level rise. In line with the rest of the Greenland Ice Sheet, the glaciers draining the northe…
View article: Coupled Ice Sheet-Ocean Modeling of the Filchner-Ronne sector using ISSM and FESOM-2
Coupled Ice Sheet-Ocean Modeling of the Filchner-Ronne sector using ISSM and FESOM-2 Open
Coupled ice sheet and ocean models are vital for projecting the dynamics of the Antarctic Ice Sheet and for predicting future sea level rise. The Filchner-Ronne sector of Antarctica contains a number of deep-bedded ice streams and glaciers…
View article: How upstream ice shelves affect Dense Water formation: Insights from FESOM2 Experiments
How upstream ice shelves affect Dense Water formation: Insights from FESOM2 Experiments Open
The Southern Ocean is the source of the Antarctic Bottom Water (AABW), a dense water mass that occupies 60 % of the global ocean. AABW is formed in different places around Antarctica as a mixture of dense shelf waters (DSW) and Circumpolar…
View article: Realistic ice-shelf/ocean state estimates (RISE) of Antarctic basal melting and drivers
Realistic ice-shelf/ocean state estimates (RISE) of Antarctic basal melting and drivers Open
Societal adaptation to rising sea levels requires robust projections of the Antarctic Ice Sheet’s retreat, particularly due to ocean-driven basal melting of its fringing ice shelves. Recent advances in ocean models that simulate ice-shelf …
View article: Regime shift caused by accelerated density reorganization on the Weddell Sea continental shelf with high-resolution atmospheric forcing
Regime shift caused by accelerated density reorganization on the Weddell Sea continental shelf with high-resolution atmospheric forcing Open
The strong Antarctic Slope Front in the southern Weddell Sea limits the present-day transport of modified Warm Deep Water onto the continental shelf and is associated with a characteristic V-shape in the density structure all along the con…
View article: Experimental design for the Marine Ice Sheet–Ocean Model Intercomparison Project – phase 2 (MISOMIP2)
Experimental design for the Marine Ice Sheet–Ocean Model Intercomparison Project – phase 2 (MISOMIP2) Open
The Marine Ice Sheet–Ocean Model Intercomparison Project – phase 2 (MISOMIP2) is a natural progression of previous and ongoing model intercomparison exercises that have focused on the simulation of ice-sheet and ocean processes in Antarcti…
View article: Comment on egusphere-2024-757
Comment on egusphere-2024-757 Open
Abstract. The Greenland Ice Sheet has steadily lost mass over the past decades, presently representing the second-largest single contributor to global sea-level rise. Even the glaciers draining the Northeast Greenland ice stream have been …
View article: The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE
The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE Open
The Greenland Ice Sheet has steadily lost mass over the past decades, presently representing the second-largest single contributor to global sea-level rise. Even the glaciers draining the Northeast Greenland ice stream have been observed t…
View article: Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain
Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain Open
The rate at which the Antarctic Ice Sheet loses mass is to a large degree controlled by ice-ocean interactions underneath small ice shelves, with the most sensitive regions concentrated in even smaller areas near grounding lines and local …
View article: Extreme melting at Greenland's largest floating ice tongue
Extreme melting at Greenland's largest floating ice tongue Open
The 79° North Glacier (Nioghalvfjerdsbrae, 79NG) is one of three remaining glaciers with a floating tongue in Greenland. Although the glacier has been considered exceptionally stable in the past, earlier studies have shown that the ice ton…
View article: Atlantic Water warming increases melt below Northeast Greenland's last floating ice tongue
Atlantic Water warming increases melt below Northeast Greenland's last floating ice tongue Open
Rising sea level poses a significant challenge and threat to our societies, given that coastal regions are densely populated. The Greenland ice sheet has been a major contributor to global sea level rise in the last decades, particularly i…
View article: Comment on egusphere-2024-95
Comment on egusphere-2024-95 Open
Abstract. The Marine Ice Sheet and Ocean Model Intercomparison Project – phase 2 (MISOMIP2) is a natural progression of previous and ongoing model intercomparison exercises that have focused on the simulation of ice-sheet and ocean process…
View article: Subsurface warming in the Antarctica’s Weddell Sea can be avoided by reaching the 2∘C warming target
Subsurface warming in the Antarctica’s Weddell Sea can be avoided by reaching the 2∘C warming target Open
Recently, seasonal pulses of modified Warm Deep Water have been observed near the Filchner Ice Shelf front in the Weddell Sea, Antarctica. Here, we investigate the temperature evolution of subsurface waters in the Filchner Trough under fou…
View article: Comment on egusphere-2024-95
Comment on egusphere-2024-95 Open
Abstract. The Marine Ice Sheet and Ocean Model Intercomparison Project – phase 2 (MISOMIP2) is a natural progression of previous and ongoing model intercomparison exercises that have focused on the simulation of ice-sheet and ocean process…
View article: Comment on egusphere-2024-95
Comment on egusphere-2024-95 Open
Abstract. The Marine Ice Sheet and Ocean Model Intercomparison Project – phase 2 (MISOMIP2) is a natural progression of previous and ongoing model intercomparison exercises that have focused on the simulation of ice-sheet and ocean process…
View article: Altered Weddell Sea warm- and dense-water pathways in response to 21st-century climate change
Altered Weddell Sea warm- and dense-water pathways in response to 21st-century climate change Open
The transport of water masses with ocean circulation is a key component of the global climate system. In this context, the Filchner Trough in the southern Weddell Sea is critical, as it is a hotspot for the cross-shelf-break exchange of De…
View article: AWI-CM model data used in the paper "Subsurface warming in the Antarctica's Weddell Sea can be avoided by reaching the 2°C warming target"
AWI-CM model data used in the paper "Subsurface warming in the Antarctica's Weddell Sea can be avoided by reaching the 2°C warming target" Open
This dataset includes the minimal data necessary to reproduce the findings of Teske et al., in revision. Output of model simulations with the global climate model AWI-CM is provided for one ensemble of five historical simulations (hist1 - …
View article: AWI-CM model data used in the paper "Subsurface warming in the Antarctica's Weddell Sea can be avoided by reaching the 2°C warming target"
AWI-CM model data used in the paper "Subsurface warming in the Antarctica's Weddell Sea can be avoided by reaching the 2°C warming target" Open
This dataset includes the minimal data necessary to reproduce the findings of Teske et al., in revision. Output of model simulations with the global climate model AWI-CM is provided for one ensemble of five historical simulations (hist1 - …
View article: Experimental design for the marine ice sheet and ocean model intercomparison project – phase 2 (MISOMIP2)
Experimental design for the marine ice sheet and ocean model intercomparison project – phase 2 (MISOMIP2) Open
The Marine Ice Sheet and Ocean Model Intercomparison Project – phase 2 (MISOMIP2) is a natural progression of previous and ongoing model intercomparison exercises that have focused on the simulation of ice-sheet and ocean processes in Anta…
View article: MIPkit-W (MISOMIP2)
MIPkit-W (MISOMIP2) Open
Observational data kit gathered and reprocessed to facilitate the evaluation of ocean and ice-sheet simulations of the Weddell Sea sector as part of MISOMIP2. __________________________________________ This entire dataset should be cited a…
View article: MIPkit-W (MISOMIP2)
MIPkit-W (MISOMIP2) Open
Observational data kit gathered and reprocessed to facilitate the evaluation of ocean and ice-sheet simulations of the Weddell Sea sector as part of MISOMIP2. __________________________________________ This entire dataset should be cited a…
View article: MIPkit-A (MISOMIP2)
MIPkit-A (MISOMIP2) Open
Observational data gathered and reprocessed to facilitate the evaluation of ocean and ice-sheet models in the Amundsen Sea sector as part of MISOMIP2. __________________________________________ This entire dataset should be cited as: the M…