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Accelerating changes in ice mass within Greenland, and the ice sheet’s sensitivity to atmospheric forcing

Bevis, Michael ; Harig, Christopher ; Khan, Shfaqat A. ; Brown, Abel ; Simons, Frederik J. ; Willis, Michael ; Fettweis, Xavier ; van den Broeke, Michiel R. ; Madsen, Finn Bo ; Kendrick, Eric ; Caccamise, Dana J. ; van Dam, Tonie ; Knudsen, Per ; Nylen, Thomas

Proceedings of the National Academy of Sciences - PNAS, 2019-02, Vol.116 (6), p.1934-1939 [Revista revisada por pares]

United States: National Academy of Sciences

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Título:
Accelerating changes in ice mass within Greenland, and the ice sheet’s sensitivity to atmospheric forcing
Autor: Bevis, Michael ; Harig, Christopher ; Khan, Shfaqat A. ; Brown, Abel ; Simons, Frederik J. ; Willis, Michael ; Fettweis, Xavier ; van den Broeke, Michiel R. ; Madsen, Finn Bo ; Kendrick, Eric ; Caccamise, Dana J. ; van Dam, Tonie ; Knudsen, Per ; Nylen, Thomas
Materias: Atmospheric forcing ; Climate models ; Deceleration ; Earth sciences & physical geography ; Geography ; Global positioning systems ; GPS ; GRACE (experiment) ; Gravity ; Ice ; Mass balance ; North Atlantic Oscillation ; Physical Sciences ; Physical, chemical, mathematical & earth Sciences ; Physique, chimie, mathématiques & sciences de la terre ; Satellite navigation systems ; Sciences de la terre & géographie physique ; Sea level ; Sea level rise ; Sensitivity
Es parte de: Proceedings of the National Academy of Sciences - PNAS, 2019-02, Vol.116 (6), p.1934-1939
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
scopus-id:2-s2.0-85061131366
Edited by Mark H. Thiemens, University of California, San Diego, La Jolla, CA, and approved December 14, 2018 (received for review April 17, 2018)
Author contributions: M.B., M.W., F.B.M., D.J.C., and P.K. designed research; M.B., S.A.K., A.B., F.J.S., M.W., X.F., M.R.v.d.B., F.B.M., E.K., D.J.C., T.v.D., and T.N. performed research; M.B. and C.H. analyzed data; M.B. wrote the paper; and F.J.S., X.F., and M.R.v.d.B. helped write the paper.
Descripción: From early 2003 to mid-2013, the total mass of ice in Greenland declined at a progressively increasing rate. In mid-2013, an abrupt reversal occurred, and very little net ice loss occurred in the next 12–18 months. Gravity Recovery and Climate Experiment (GRACE) and global positioning system (GPS) observations reveal that the spatial patterns of the sustained acceleration and the abrupt deceleration in mass loss are similar. The strongest accelerations tracked the phase of the North Atlantic Oscillation (NAO). The negative phase of the NAO enhances summertime warming and insolation while reducing snowfall, especially in west Greenland, driving surface mass balance (SMB) more negative, as illustrated using the regional climate model MAR. The spatial pattern of accelerating mass changes reflects the geography of NAO-driven shifts in atmospheric forcing and the ice sheet’s sensitivity to that forcing. We infer that southwest Greenland will become a major future contributor to sea level rise.
Editor: United States: National Academy of Sciences
Idioma: Inglés

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Accelerating changes in ice mass within Greenland, and the ice sheet’s sensitivity to atmospheric forcing

Bevis, Michael ; Harig, Christopher ; Khan, Shfaqat A. ; Brown, Abel ; Simons, Frederik J. ; Willis, Michael ; Fettweis, Xavier ; van den Broeke, Michiel R. ; Madsen, Finn Bo ; Kendrick, Eric ; Caccamise, Dana J. ; van Dam, Tonie ; Knudsen, Per ; Nylen, Thomas

United States: National Academy of Sciences

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