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Arctic cut-off high drives the poleward shift of a new Greenland melting record

Large-scale atmospheric circulation controls the mass and energy balance of the Greenland ice sheet through its impact on radiative budget, runoff and accumulation. Here, using reanalysis data and the outputs of a regional climate model, we show that the persistence of an exceptional atmospheric rid...

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Autores principales: Tedesco, M., Mote, T., Fettweis, X., Hanna, E., Jeyaratnam, J., Booth, J. F., Datta, R., Briggs, K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4906163/
https://www.ncbi.nlm.nih.gov/pubmed/27277547
http://dx.doi.org/10.1038/ncomms11723
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author Tedesco, M.
Mote, T.
Fettweis, X.
Hanna, E.
Jeyaratnam, J.
Booth, J. F.
Datta, R.
Briggs, K.
author_facet Tedesco, M.
Mote, T.
Fettweis, X.
Hanna, E.
Jeyaratnam, J.
Booth, J. F.
Datta, R.
Briggs, K.
author_sort Tedesco, M.
collection PubMed
description Large-scale atmospheric circulation controls the mass and energy balance of the Greenland ice sheet through its impact on radiative budget, runoff and accumulation. Here, using reanalysis data and the outputs of a regional climate model, we show that the persistence of an exceptional atmospheric ridge, centred over the Arctic Ocean, was responsible for a poleward shift of runoff, albedo and surface temperature records over the Greenland during the summer of 2015. New records of monthly mean zonal winds at 500 hPa and of the maximum latitude of ridge peaks of the 5,700±50 m isohypse over the Arctic were associated with the formation and persistency of a cutoff high. The unprecedented (1948–2015) and sustained atmospheric conditions promoted enhanced runoff, increased the surface temperatures and decreased the albedo in northern Greenland, while inhibiting melting in the south, where new melting records were set over the past decade.
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spelling pubmed-49061632016-06-24 Arctic cut-off high drives the poleward shift of a new Greenland melting record Tedesco, M. Mote, T. Fettweis, X. Hanna, E. Jeyaratnam, J. Booth, J. F. Datta, R. Briggs, K. Nat Commun Article Large-scale atmospheric circulation controls the mass and energy balance of the Greenland ice sheet through its impact on radiative budget, runoff and accumulation. Here, using reanalysis data and the outputs of a regional climate model, we show that the persistence of an exceptional atmospheric ridge, centred over the Arctic Ocean, was responsible for a poleward shift of runoff, albedo and surface temperature records over the Greenland during the summer of 2015. New records of monthly mean zonal winds at 500 hPa and of the maximum latitude of ridge peaks of the 5,700±50 m isohypse over the Arctic were associated with the formation and persistency of a cutoff high. The unprecedented (1948–2015) and sustained atmospheric conditions promoted enhanced runoff, increased the surface temperatures and decreased the albedo in northern Greenland, while inhibiting melting in the south, where new melting records were set over the past decade. Nature Publishing Group 2016-06-09 /pmc/articles/PMC4906163/ /pubmed/27277547 http://dx.doi.org/10.1038/ncomms11723 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Tedesco, M.
Mote, T.
Fettweis, X.
Hanna, E.
Jeyaratnam, J.
Booth, J. F.
Datta, R.
Briggs, K.
Arctic cut-off high drives the poleward shift of a new Greenland melting record
title Arctic cut-off high drives the poleward shift of a new Greenland melting record
title_full Arctic cut-off high drives the poleward shift of a new Greenland melting record
title_fullStr Arctic cut-off high drives the poleward shift of a new Greenland melting record
title_full_unstemmed Arctic cut-off high drives the poleward shift of a new Greenland melting record
title_short Arctic cut-off high drives the poleward shift of a new Greenland melting record
title_sort arctic cut-off high drives the poleward shift of a new greenland melting record
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4906163/
https://www.ncbi.nlm.nih.gov/pubmed/27277547
http://dx.doi.org/10.1038/ncomms11723
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