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Summer atmospheric circulation over Greenland in response to Arctic amplification and diminished spring snow cover

Author

Listed:
  • Jonathon R. Preece

    (University of Georgia)

  • Thomas L. Mote

    (University of Georgia)

  • Judah Cohen

    (Atmospheric and Environmental Research Inc.
    Massachusetts Institute of Technology)

  • Lori J. Wachowicz

    (University of Georgia)

  • John A. Knox

    (University of Georgia)

  • Marco Tedesco

    (Columbia University
    NASA Goddard Institute for Space Studies
    Columbia University)

  • Gabriel J. Kooperman

    (University of Georgia)

Abstract

The exceptional atmospheric conditions that have accelerated Greenland Ice Sheet mass loss in recent decades have been repeatedly recognized as a possible dynamical response to Arctic amplification. Here, we present evidence of two potentially synergistic mechanisms linking high-latitude warming to the observed increase in Greenland blocking. Consistent with a prominent hypothesis associating Arctic amplification and persistent weather extremes, we show that the summer atmospheric circulation over the North Atlantic has become wavier and link this wavier flow to more prevalent Greenland blocking. While a concomitant decline in terrestrial snow cover has likely contributed to this mechanism by further amplifying warming at high latitudes, we also show that there is a direct stationary Rossby wave response to low spring North American snow cover that enforces an anomalous anticyclone over Greenland, thus helping to anchor the ridge over Greenland in this wavier atmospheric state.

Suggested Citation

  • Jonathon R. Preece & Thomas L. Mote & Judah Cohen & Lori J. Wachowicz & John A. Knox & Marco Tedesco & Gabriel J. Kooperman, 2023. "Summer atmospheric circulation over Greenland in response to Arctic amplification and diminished spring snow cover," Nature Communications, Nature, vol. 14(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39466-6
    DOI: 10.1038/s41467-023-39466-6
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    References listed on IDEAS

    as
    1. Luke D. Trusel & Sarah B. Das & Matthew B. Osman & Matthew J. Evans & Ben E. Smith & Xavier Fettweis & Joseph R. McConnell & Brice P. Y. Noël & Michiel R. Broeke, 2018. "Nonlinear rise in Greenland runoff in response to post-industrial Arctic warming," Nature, Nature, vol. 564(7734), pages 104-108, December.
    2. M. Tedesco & T. Mote & X. Fettweis & E. Hanna & J. Jeyaratnam & J. F. Booth & R. Datta & K. Briggs, 2016. "Arctic cut-off high drives the poleward shift of a new Greenland melting record," Nature Communications, Nature, vol. 7(1), pages 1-6, September.
    3. Thomas Slater & Anna E. Hogg & Ruth Mottram, 2020. "Ice-sheet losses track high-end sea-level rise projections," Nature Climate Change, Nature, vol. 10(10), pages 879-881, October.
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