Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016)
Jan Melchior van Wessem,Willem Jan van de Berg,Brice Noël,Erik van Meijgaard,Charles Amory,Gerit Birnbaum,Constantijn L. Jakobs,Konstantin Krüger,Jan T. M. Lenaerts,Stef Lhermitte,Stefan R. M. Ligtenberg,Brooke Medley,Carleen Reijmer,Kristof Van Tricht,Luke D. Trusel,Lambertus H. van Ulft,Bert Wouters,Jan Wuite,Michiel R. van den Broeke +18 more
TLDR
In this article, the authors evaluate modelled Antarctic ice sheet (AIS) near-surface climate, surfacemass balance (SMB) and surface energy balance (SEB) from the updated polar version of the regional atmospheric climate model, RACMO2 (1979-2016).Abstract:
. We evaluate modelled Antarctic ice sheet (AIS) near-surface climate, surface
mass balance (SMB) and surface energy balance (SEB) from the updated polar
version of the regional atmospheric climate model, RACMO2 (1979–2016). The
updated model, referred to as RACMO2.3p2, incorporates upper-air relaxation,
a revised topography, tuned parameters in the cloud scheme to generate more
precipitation towards the AIS interior and modified snow properties reducing
drifting snow sublimation and increasing surface snowmelt. Comparisons of RACMO2 model output with several independent observational
data show that the existing biases in AIS temperature, radiative fluxes and
SMB components are further reduced with respect to the previous model
version. The model-integrated annual average SMB for the ice sheet including
ice shelves (minus the Antarctic Peninsula, AP) now amounts to
2229 Gt y −1 , with an interannual variability of 109 Gt y −1 . The
largest improvement is found in modelled surface snowmelt, which now compares
well with satellite and weather station observations. For the high-resolution
( ∼ 5.5 km) AP simulation, results remain comparable to earlier
studies. The updated model provides a new, high-resolution data set of the contemporary
near-surface climate and SMB of the AIS; this model version will be used for
future climate scenario projections in a forthcoming study.read more
Citations
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The Community Earth System Model Version 2 (CESM2)
Gokhan Danabasoglu,Jean-Francois Lamarque,Julio T. Bacmeister,David A. Bailey,Alice K. DuVivier,Jim Edwards,Louisa K. Emmons,John T. Fasullo,Rolando R. Garcia,Andrew Gettelman,Cecile Hannay,Marika M. Holland,William G. Large,Peter H. Lauritzen,David M. Lawrence,Jan T. M. Lenaerts,Keith Lindsay,William H. Lipscomb,Michael J. Mills,Richard Neale,Keith W. Oleson,Bette L. Otto-Bliesner,Adam S. Phillips,William J. Sacks,Simone Tilmes,L. van Kampenhout,Mariana Vertenstein,Alice Bertini,John M. Dennis,Clara Deser,Christopher Fischer,B. Fox-Kemper,Jennifer E. Kay,Douglas E. Kinnison,Paul J. Kushner,Vincent E. Larson,Matthew C. Long,Sheri Mickelson,J. K. Moore,Eric Nienhouse,Lorenzo M. Polvani,Philip J. Rasch,Warren G. Strand +42 more
TL;DR: The Community Earth System Model Version 2 (CESM2) as discussed by the authors is the most recent version of the Coupled Model Intercomparison Project (CMEI) coupled model.
Journal ArticleDOI
Mass balance of the Antarctic ice sheet from 1992 to 2017.
Andrew Shepherd,Erik R. Ivins,Eric Rignot,Ben Smith,Michiel R. van den Broeke,Isabella Velicogna,Pippa L. Whitehouse,Kate Briggs,Ian Joughin,Gerhard Krinner,Sophie Nowicki,Tony Payne,Ted Scambos,Nicole Schlegel,Geruo A,Cécile Agosta,Andreas P. Ahlstrøm,Greg Babonis,Valentina R. Barletta,Alejandro Blazquez,Jennifer Bonin,Beata Csatho,Richard I. Cullather,Denis Felikson,Xavier Fettweis,René Forsberg,Hubert Gallée,Alex S. Gardner,Lin Gilbert,Andreas Groh,Brian Gunter,Edward Hanna,Christopher Harig,Veit Helm,Alexander Horvath,Martin Horwath,Shfaqat Abbas Khan,Kristian K. Kjeldsen,Hannes Konrad,Peter L. Langen,Benoit S. Lecavalier,Bryant D. Loomis,Scott B. Luthcke,Malcolm McMillan,Daniele Melini,Sebastian H. Mernild,Sebastian H. Mernild,Sebastian H. Mernild,Yara Mohajerani,Philip Moore,Jeremie Mouginot,Jeremie Mouginot,Gorka Moyano,Alan Muir,Thomas Nagler,Grace A. Nield,Johan Nilsson,Brice Noël,Ines Otosaka,Mark E. Pattle,W. Richard Peltier,Nadege Pie,Roelof Rietbroek,Helmut Rott,Louise Sandberg-Sørensen,Ingo Sasgen,Himanshu Save,Bernd Scheuchl,Ernst Schrama,Ludwig Schröder,Ki-Weon Seo,Sebastian B. Simonsen,Thomas Slater,Giorgio Spada,T. C. Sutterley,Matthieu Talpe,Lev Tarasov,Willem Jan van de Berg,Wouter van der Wal,Melchior van Wessem,Bramha Dutt Vishwakarma,David N. Wiese,Bert Wouters +82 more
TL;DR: This work combines satellite observations of its changing volume, flow and gravitational attraction with modelling of its surface mass balance to show that the Antarctic Ice Sheet lost 2,720 ± 1,390 billion tonnes of ice between 1992 and 2017, which corresponds to an increase in mean sea level of 7.6‚¬3.9 millimetres.
Journal ArticleDOI
Four decades of Antarctic Ice Sheet mass balance from 1979-2017.
Eric Rignot,Eric Rignot,Jeremie Mouginot,Jeremie Mouginot,Bernd Scheuchl,Michiel R. van den Broeke,Melchior van Wessem,Mathieu Morlighem +7 more
TL;DR: During the entire period, the mass loss concentrated in areas closest to warm, salty, subsurface, circumpolar deep water (CDW), consistent with enhanced polar westerlies pushing CDW toward Antarctica to melt its floating ice shelves, destabilize the glaciers, and raise sea level.
Journal ArticleDOI
Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet
Mathieu Morlighem,Eric Rignot,Tobias Binder,Donald D. Blankenship,Reinhard Drews,Reinhard Drews,Graeme Eagles,Olaf Eisen,Fausto Ferraccioli,René Forsberg,Peter T. Fretwell,Vikram Goel,Jamin S. Greenbaum,Hilmar Gudmundsson,Jingxue Guo,Veit Helm,Coen Hofstede,Ian M. Howat,Angelika Humbert,Wilfried Jokat,Nanna B. Karlsson,Won Sang Lee,Kenichi Matsuoka,Romain Millan,Jeremie Mouginot,John Paden,Frank Pattyn,Jason L. Roberts,Sebastian Rosier,Antonia Ruppel,Helene Seroussi,Emma Smith,Daniel Steinhage,Bo Sun,Michiel R. van den Broeke,Tas van Ommen,Melchior van Wessem,Duncan A. Young +37 more
TL;DR: In this paper, a high-resolution and physically based description of Antarctica bed topography using mass conservation is presented, revealing previously unknown basal features with major implications for glacier response to climate change.
Journal ArticleDOI
Global sea-level budget 1993 - present
Anny Cazenave,Benoit Meyssignac,Michael Ablain,Magdalena Balmaseda,Jonathan L. Bamber,Valentina R. Barletta,Brian D. Beckley,Jérôme Benveniste,Etienne Berthier,Alejandro Blazquez,Timothy P. Boyer,Denise Cáceres,Don P. Chambers,Nicolas Champollion,Ben Chao,Jianli Chen,Lijing Cheng,John A. Church,Stephen Chuter,J. Graham Cogley,Soenke Dangendorf,Damien Desbruyères,Petra Döll,Catia M. Domingues,Ulrike Falk,James S. Famiglietti,Luciana Fenoglio-Marc,René Forsberg,Gaia Galassi,Alex S. Gardner,Andreas Groh,Benjamin D. Hamlington,Anna E. Hogg,Martin Horwath,Vincent Humphrey,Laurent Husson,Masayoshi Ishii,A. Jaeggi,Svetlana Jevrejeva,Gregory C. Johnson,Nicolas Kolodziejczyk,Jürgen Kusche,Kurt Lambeck,Felix W. Landerer,P. W. Leclercq,Benoit Legresy,Eric Leuliette,William Llovel,Laurent Longuevergne,Bryant D. Loomis,Scott B. Luthcke,Marta Marcos,Ben Marzeion,Christopher J. Merchant,Mark A. Merrifield,Glenn A. Milne,Gary T. Mitchum,Yara Mohajerani,Maeva Monier,Didier Monselesan,Steve Nerem,Hindumathi Palanisamy,Frank Paul,Begoña Pérez,Christopher G. Piecuch,Rui M. Ponte,Sarah G. Purkey,John T. Reager,Roelof Rietbroek,Eric Rignot,Riccardo Riva,Dean Roemmich,Louise Sandberg Sørensen,Ingo Sasgen,E.J.O. Schram,Sonia I. Seneviratne,C. K. Shum,Giorgio Spada,Detlef Stammer,Roderic van de Wal,Isabella Velicogna,Karina von Schuckmann,Yoshihide Wada,Yiguo Wang,Christopher Watson,David N. Wiese,Susan Wijffels,Richard M. Westaway,Guy Wöppelmann,Bert Wouters +89 more
TL;DR: In this paper, the authors present estimates of the altimetry-based global mean sea level (average variance of 3.1 +/- 0.3 mm/yr and acceleration of 0.1 mm/r2 over 1993-present), as well as of the different components of the sea level budget over 2005-present, using GRACE-based ocean mass estimates.
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TL;DR: There is good agreement between different satellite methods—especially in Greenland and West Antarctica—and that combining satellite data sets leads to greater certainty, and the mass balance of Earth’s polar ice sheets is estimated by combining the results of existing independent techniques.
Supplementary Materials for A Reconciled Estimate of Ice-Sheet Mass Balance
Andrew Shepherd,Erik R. Ivins,Geruo A,Valentina R. Barletta,Michael J. Bentley,Srinivas Bettadpur,Kate Briggs,David H. Bromwich,René Forsberg,Natalia Galin,Martin Horwath,Stan Jacobs,Ian Joughin,Matt A. King,Jan T. M. Lenaerts,Jilu Li,Stefan R. M. Ligtenberg,Adrian Luckman,Scott B. Luthcke,Malcolm McMillan,Glenn A. Milne,Jeremie Mouginot,Alan Muir,Julien Nicolas,John Paden,A. J. Payne,Hamish D. Pritchard,Eric Rignot,Helmut Rott,Ted Scambos,Bernd Scheuchl,Ernst Schrama,Ben Smith,Jan H. van Angelen,Willem Jan van de Berg,Michiel van den Broeke,Isabella Velicogna,John Wahr,Pippa L. Whitehouse,Duncan J. Wingham,Donghui Yi,Duncan Young,H. Jay Zwally +42 more
Journal ArticleDOI
Acceleration of the contribution of the Greenland and Antarctic ice sheets to sea level rise
Eric Rignot,Eric Rignot,Isabella Velicogna,Isabella Velicogna,M. R. van den Broeke,Andrew J. Monaghan,Jan T. M. Lenaerts +6 more
TL;DR: In this article, the authors present a consistent record of mass balance for the Greenland and Antarctic ice sheets over the past two decades, validated by the comparison of two independent techniques over the last 8 years: one differencing perimeter loss from net accumulation, and one using a dense time series of time-variable gravity.
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