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Surface mass balance and climate of the Last Glacial Maximum Northern Hemisphere ice sheets: simulations with CESM2.1

Bradley, Sarah L. (author), Sellevold, R. (author), Petrini, M. (author), Vizcaino, M. (author), Georgiou, S. (author), Zhu, Jiang (author), Otto-Bliesner, Bette L. (author), Lofverstrom, Marcus (author)

The Last Glacial Maximum (LGM, from ∼26 to 20 ka BP) was the most recent period with large ice sheets in Eurasia and North America. At that time, global temperatures were 5–7 ∘C lower than today, and sea level ∼125 m lower. LGM simulations are useful to understand earth system dynamics, including climate–ice sheet interactions, and to evaluate...

journal article 2024

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Can rifts alter ocean dynamics beneath ice shelves?

Poinelli, M. (author), Schodlok, Michael (author), Larour, Eric (author), Vizcaino, M. (author), Riva, R.E.M. (author)

Land ice discharge from the Antarctic continent into the ocean is restrained by ice shelves, floating extensions of grounded ice that buttress the glacier outflow. The ongoing thinning of these ice shelves – largely due to enhanced melting at their base in response to global warming – is known to accelerate the release of glacier meltwater into...

journal article 2023

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Ice-Front Retreat Controls on Ocean Dynamics Under Larsen C Ice Shelf, Antarctica

Poinelli, M. (author), Nakayama, Y. (author), Larour, E. (author), Vizcaino, M. (author), Riva, R.E.M. (author)

Iceberg A-68 separated from the Larsen C Ice Shelf in July 2017 and the impact of this event on the local ocean circulation has yet to be assessed. Here, we conduct numerical simulations of ocean dynamics near and below the ice shelf pre- and post-calving. Results agree with in situ and remote observations of the area as they indicate that...

journal article 2023

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Future changes in annual, seasonal and monthly runoff signatures in contrasting Alpine catchments in Austria

Hanus, S. (author), Hrachowitz, M. (author), Zekollari, H. (author), Schoups, G.H.W. (author), Vizcaino, M. (author), Kaitna, Roland (author)

Hydrological regimes of alpine catchments are expected to be strongly affected by climate change, mostly due to their dependence on snow and ice dynamics. While seasonal changes have been studied extensively, studies on changes in the timing and magnitude of annual extremes remain rare. This study investigates the effects of climate change on...

journal article 2021

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Description and Demonstration of the Coupled Community Earth System Model v2 – Community Ice Sheet Model v2 (CESM2-CISM2)

Muntjewerf, L. (author), Sacks, William J. (author), Lofverstrom, Marcus (author), Fyke, Jeremy (author), Lipscomb, William H. (author), Ernani da Silva, C. (author), Vizcaino, M. (author), Thayer-Calder, Katherine (author), T. M. Lenaerts, Jan (author), Sellevold, R. (author)

Earth system/ice-sheet coupling is an area of recent, major Earth System Model (ESM) development. This work occurs at the intersection of glaciology and climate science and is motivated by a need for robust projections of sea-level rise. The Community Ice Sheet Model version 2 (CISM2) is the newest component model of the Community Earth...

journal article 2021

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First Application of Artificial Neural Networks to Estimate 21st Century Greenland Ice Sheet Surface Melt

Sellevold, R. (author), Vizcaino, M. (author)

Future Greenland ice sheet (GrIS) melt projections are limited by the lack of explicit melt calculations within most global climate models and the high computational cost of dynamical downscaling with regional climate models (RCMs). Here, we train artificial neural networks (ANNs) to obtain relationships between quantities consistently...

journal article 2021

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Influence of Arctic sea-ice loss on the Greenland ice sheet climate

Sellevold, R. (author), Lenaerts, Jan T.M. (author), Vizcaino, M. (author)

The Arctic is the region on Earth that is warming the fastest. At the same time, Arctic sea ice is reducing while the Greenland ice sheet (GrIS) is losing mass at an accelerated pace. Here, we study the seasonal impact of reduced Arctic sea ice on GrIS surface mass balance (SMB), using the Community Earth System Model version 2.1 (CESM2),...

journal article 2021

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Global Warming Threshold and Mechanisms for Accelerated Greenland Ice Sheet Surface Mass Loss

Sellevold, R. (author), Vizcaino, M. (author)

The Community Earth System Model version 2.1 (CESM2.1) is used to investigate the evolution of the Greenland ice sheet (GrIS) surface mass balance (SMB) under an idealized CO₂ forcing scenario of 1% increase until stabilization at 4× pre-industrial at model year 140. In this simulation, the SMB calculation is coupled with the...

journal article 2020

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Present-Day Greenland Ice Sheet Climate and Surface Mass Balance in CESM2

van Kampenhout, Leonardus (author), Lenaerts, Jan T.M. (author), Lipscomb, William H. (author), Lhermitte, S.L.M. (author), Noël, Brice (author), Vizcaino, M. (author), Sacks, W. J. (author), van den Broeke, Michiel R. (author)

The response of the Greenland Ice Sheet (GrIS) to a warmer climate is uncertain on long time scales. Climate models, such as those participating in the Coupled Model Intercomparison Project phase 6 (CMIP6), are used to assess this uncertainty. The Community Earth System Model version 2.1 (CESM2) is a CMIP6 model capable of running climate...

journal article 2020

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Greenland Ice Sheet Contribution to 21st Century Sea Level Rise as Simulated by the Coupled CESM2.1-CISM2.1

Muntjewerf, L. (author), Petrini, M. (author), Vizcaino, M. (author), Ernani da Silva, C. (author), Sellevold, R. (author), Scherrenberg, Meike D.W. (author), Thayer-Calder, Katherine (author), Bradley, Sarah L. (author), Lenaerts, Jan T.M. (author)

The Greenland Ice Sheet (GrIS) mass balance is examined with an Earth system/ice sheet model that interactively couples the GrIS to the broader Earth system. The simulation runs from 1850 to 2100, with historical and SSP5-8.5 forcing. By the mid-21st century, the cumulative GrIS contribution to global mean sea level rise (SLR) is 23 mm....

journal article 2020

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An Efficient Ice Sheet/Earth System Model Spin-up Procedure for CESM2-CISM2: Description, Evaluation, and Broader Applicability

Lofverstrom, Marcus (author), Fyke, Jeremy G. (author), Thayer-Calder, Katherine (author), Muntjewerf, L. (author), Vizcaino, M. (author), Sacks, William J. (author), Lipscomb, William H. (author), Otto-Bliesner, Bette L. (author), Bradley, S.L. (author)

Spinning up a highly complex, coupled Earth system model (ESM) is a time consuming and computationally demanding exercise. For models with interactive ice sheet components, this becomes a major challenge, as ice sheets are sensitive to bidirectional feedback processes and equilibrate over glacial timescales of up to many millennia. This work...

journal article 2020

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Mass balance of the ice sheets and glaciers – Progress since AR5 and challenges

Hanna, Edward (author), Pattyn, Frank (author), Navarro, Francisco (author), Favier, Vincent (author), Goelzer, Heiko (author), van den Broeke, Michiel R. (author), Vizcaino, M. (author), Whitehouse, Pippa L. (author), Ritz, Catherine (author)

Recent research shows increasing decadal ice mass losses from the Greenland and Antarctic Ice Sheets and more generally from glaciers worldwide in the light of continued global warming. Here, in an update of our previous ISMASS paper (Hanna et al., 2013), we review recent observational estimates of ice sheet and glacier mass balance, and...

review 2020

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Accelerated Greenland Ice Sheet Mass Loss Under High Greenhouse Gas Forcing as Simulated by the Coupled CESM2.1-CISM2.1

Muntjewerf, L. (author), Sellevold, R. (author), Vizcaino, M. (author), Ernani da Silva, C. (author), Petrini, M. (author), Thayer-Calder, Katherine (author), Scherrenberg, Meike D.W. (author), Bradley, S.L. (author), Katsman, C.A. (author), Fyke, Jeremy (author), Lipscomb, William H. (author), Lofverstrom, Marcus (author), Sacks, William J. (author)

The Greenland ice sheet (GrIS) is now losing mass at a rate of 0.7 mm of sea level rise (SLR) per year. Here we explore future GrIS evolution and interactions with global and regional climate under high greenhouse gas forcing with the Community Earth System Model version 2.1 (CESM2.1), which includes an interactive ice sheet component (the...

journal article 2020

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Future evolution of the Greenland Ice Sheet in a coupled climate and ice sheet model: CESM2.1-CISM2.1 contribution to ISMIP6

Muntjewerf, L. (author), Lipscomb, William (author), Thayer-Calder, Kate (author), Bradley, S.L. (author), Fyke, Jeremy (author), Ernani da Silva, C. (author), Sellevold, R. (author), Petrini, M. (author), Vizcaino, M. (author)

poster 2019

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North Atlantic Ocean Circulation around Greenland in CESM 2.0

Ernani da Silva, C. (author), Vizcaino, M. (author), Katsman, C.A. (author)

abstract 2019

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LIVVkit 2.1: Automated and extensible ice sheet model validation

Evans, Katherine J. (author), Kennedy, Joseph H. (author), Lu, Dan (author), Forrester, Mary M. (author), Price, Stephen (author), Fyke, Jeremy (author), Bennett, Andrew R. (author), Hoffman, Matthew J. (author), Tezaur, Irina (author), Zender, Charles S. (author), Vizcaino, M. (author)

A collection of scientific analyses, metrics, and visualizations for robust validation of ice sheet models is presented using the Land Ice Verification and Validation toolkit (LIVVkit), version 2.1, and the LIVVkit Extensions repository (LEX), version 0.1. This software collection targets stand-alone ice sheet or coupled Earth system models,...

journal article 2019

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Surface mass balance downscaling through elevation classes in an Earth system model: Application to the Greenland ice sheet

Sellevold, R. (author), Van Kampenhout, Leonardus (author), Lenaerts, Jan T.M. (author), Noël, Brice (author), Lipscomb, William H. (author), Vizcaino, M. (author)

The modeling of ice sheets in Earth system models (ESMs) is an active area of research with applications to future sea level rise projections and paleoclimate studies. A major challenge for surface mass balance (SMB) modeling with ESMs arises from their coarse resolution. This paper evaluates the elevation class (EC) method as an SMB downscaling...

journal article 2019

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Seasonal mass variations show timing and magnitude of meltwater storage in the Greenland ice sheet

Ran, J. (author), Vizcaino, M. (author), Ditmar, P.G. (author), van den Broeke, Michiel R. (author), Moon, Twila (author), Steger, Christian (author), Enderlin, Ellyn (author), Wouters, Bert (author), Noël, Brice (author), Reijmer, Catharina (author), Klees, R. (author), Zhong, Min (author)

The Greenland Ice Sheet (GrIS) is currently losing ice mass as the result of changes in the complex ice-climate interactions that have been driven by global climate change. In order to accurately predict future sea level rise, the mechanisms driving the observed mass loss must be better understood. Here, we combine data from the satellite...

journal article 2018

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Present-day and future Antarctic ice sheet climate and surface mass balance in the Community Earth System Model

Lenaerts, Jan T M (author), Vizcaino, M. (author), Fyke, Jeremy (author), van Kampenhout, Leo (author), van den Broeke, Michiel R. (author)

We present climate and surface mass balance (SMB) of the Antarctic ice sheet (AIS) as simulated by the global, coupled ocean–atmosphere–land Community Earth System Model (CESM) with a horizontal resolution of ∼ 1 ^∘ in the past, present and future (1850–2100). CESM correctly simulates present-day Antarctic sea ice extent, large...

journal article 2016

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1850-2200 coupled Greenland ice sheet surface mass balance and climate evolution as simulated by the community earth system model

Vizcaino, M. (author), Lenaerts, J. (author), Sacks, W. (author), Van Kampenhout, L. (author)

journal article 2015