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Journal Articles Earth System Science Data Year : 2023

Mass balance of the Greenland and Antarctic ice sheets from 1992 to 2020

Inès N. Otosaka
  • Function : Author
Andrew Shepherd
  • Function : Author
Erik R. Ivins
  • Function : Author
Nicole-Jeanne Schlegel
  • Function : Author
Michiel R. van den Broeke
  • Function : Author
Martin Horwath
  • Function : Author
Ian Joughin
  • Function : Author
Michalea D. King
  • Function : Author
Sophie Nowicki
  • Function : Author
Anthony J. Payne
  • Function : Author
Eric Rignot
  • Function : Author
Ted Scambos
  • Function : Author
Karen M. Simon
  • Function : Author
Benjamin E. Smith
  • Function : Author
Louise S. Sørensen
  • Function : Author
Isabella Velicogna
  • Function : Author
Pippa L. Whitehouse
  • Function : Author
Geruo A
  • Function : Author
Andreas P. Ahlstrøm
  • Function : Author
William Colgan
  • Function : Author
Marcus E. Engdahl
  • Function : Author
Xavier Fettweis
  • Function : Author
Rene Forsberg
  • Function : Author
Alex Gardner
  • Function : Author
Lin Gilbert
  • Function : Author
Noel Gourmelen
  • Function : Author
Andreas Groh
  • Function : Author
Brian C. Gunter
  • Function : Author
Christopher Harig
  • Function : Author
Veit Helm
  • Function : Author
Shfaqat Abbas Khan
  • Function : Author
Hannes Konrad
  • Function : Author
Peter L. Langen
  • Function : Author
Benoit S. Lecavalier
  • Function : Author
Chia-Chun Liang
  • Function : Author
Bryant D. Loomis
  • Function : Author
Malcolm Mcmillan
  • Function : Author
Daniele Melini
  • Function : Author
Sebastian H. Mernild
  • Function : Author
Ruth Mottram
  • Function : Author
Johan Nilsson
  • Function : Author
Brice Noël
  • Function : Author
Mark E. Pattle
  • Function : Author
William R. Peltier
  • Function : Author
Nadege Pie
  • Function : Author
Mònica Roca
  • Function : Author
Ingo Sasgen
  • Function : Author
Himanshu V. Save
  • Function : Author
Ki-Weon Seo
  • Function : Author
Bernd Scheuchl
  • Function : Author
Ernst J. O. Schrama
  • Function : Author
Ludwig Schröder
  • Function : Author
Sebastian B. Simonsen
  • Function : Author
Thomas Slater
  • Function : Author
Giorgio Spada
  • Function : Author
Tyler C. Sutterley
  • Function : Author
Bramha Dutt Vishwakarma
  • Function : Author
Jan Melchior van Wessem
  • Function : Author
David Wiese
  • Function : Author
Wouter van der Wal
  • Function : Author
Bert Wouters
  • Function : Author

Abstract

Ice losses from the Greenland and Antarctic ice sheets have accelerated since the 1990s, accounting for a significant increase in the global mean sea level. Here, we present a new 29-year record of ice sheet mass balance from 1992 to 2020 from the Ice Sheet Mass Balance Inter-comparison Exercise (IMBIE). We compare and combine 50 independent estimates of ice sheet mass balance derived from satellite observations of temporal changes in ice sheet flow, in ice sheet volume, and in Earth's gravity field. Between 1992 and 2020, the ice sheets contributed 21.0±1.9 mm to global mean sea level, with the rate of mass loss rising from 105 Gt yr−1 between 1992 and 1996 to 372 Gt yr−1 between 2016 and 2020. In Greenland, the rate of mass loss is 169±9 Gt yr−1 between 1992 and 2020, but there are large inter-annual variations in mass balance, with mass loss ranging from 86 Gt yr−1 in 2017 to 444 Gt yr−1 in 2019 due to large variability in surface mass balance. In Antarctica, ice losses continue to be dominated by mass loss from West Antarctica (82±9 Gt yr−1) and, to a lesser extent, from the Antarctic Peninsula (13±5 Gt yr−1). East Antarctica remains close to a state of balance, with a small gain of 3±15 Gt yr−1, but is the most uncertain component of Antarctica's mass balance. The dataset is publicly available at https://doi.org/10.5285/77B64C55-7166-4A06-9DEF-2E400398E452 (IMBIE Team, 2021).
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insu-04106436 , version 1 (25-05-2023)

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Inès N. Otosaka, Andrew Shepherd, Erik R. Ivins, Nicole-Jeanne Schlegel, Charles Amory, et al.. Mass balance of the Greenland and Antarctic ice sheets from 1992 to 2020. Earth System Science Data, 2023, 15, pp.1597-1616. ⟨10.5194/essd-15-1597-2023⟩. ⟨insu-04106436⟩
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