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1000 Titel
  • Fjord circulation induced by melting icebergs
1000 Autor/in
  1. Hughes, Kenneth G. |
1000 Verlag
  • Copernicus Publications
1000 Erscheinungsjahr 2024
1000 Publikationstyp
  1. Artikel |
1000 Online veröffentlicht
  • 2024-03-21
1000 Erschienen in
1000 Quellenangabe
  • 18(3):1315-1332
1000 Copyrightjahr
  • 2024
1000 Lizenz
1000 Verlagsversion
  • https://doi.org/10.5194/tc-18-1315-2024 |
1000 Publikationsstatus
1000 Begutachtungsstatus
1000 Sprache der Publikation
1000 Abstract/Summary
  • <jats:p>Abstract. In an iceberg-choked fjord, meltwater can drive circulation. Down-fjord of the ice, buoyancy and rotation lead to an outflowing surface coastal current hugging one side of the fjord with an inflowing counter-current below. To predict the structure and evolution of these currents, we develop an analytical model – complemented by numerical simulations – that involves a rectangular fjord initially at rest. Specifically, we (i) start with the so-called Rossby adjustment problem; (ii) reconfigure it for a closed channel with stratification; and (iii) generalize the conventional “dam-break” scenario to a gradual-release one that mimics the continual, slow injection of meltwater. Implicit in this description is the result that circulation is mediated by internal Kelvin waves. The analytical model shows that if the total meltwater flux increases (e.g., a larger mélange, warmer water, or enhanced ice–ocean turbulence) then circulation strength increases as would be expected. For realistic parameters, a given meltwater flux induces an exchange flow that is ∼50 times larger. This factor decreases with increasing water column stratification and vice versa. Overall, this paper is a step toward making Greenland-wide predictions of fjord inflows and outflows induced by icebergs. </jats:p>
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  1. Heising-Simons Foundation |
  2. National Science Foundation |
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1000 Dateien
  1. Fjord circulation induced by melting icebergs
1000 Förderung
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    1000 Förderer Heising-Simons Foundation |
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  2. 1000 joinedFunding-child
    1000 Förderer National Science Foundation |
    1000 Förderprogramm -
    1000 Fördernummer -
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1000 Erstellt am 2024-05-23T13:08:15.341+0200
1000 Erstellt von 322
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1000 Zuletzt bearbeitet 2024-05-27T11:52:09.635+0200
1000 Objekt bearb. Mon May 27 11:52:09 CEST 2024
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