Emerging trends in the sea state of the Beaufort and Chukchi seas

Jim Thomson, Yalin Fan, Sharon Stammerjohn, Justin Stopa, W. Erick Rogers, Fanny Girard-Ardhuin, Fabrice Ardhuin, Hayley Shen, Will Perrie, Hui Shen, Steve Ackley, Alex Babanin, Qingxiang Liu, Peter Guest, Ted Maksym, Peter Wadhams, Chris Fairall, Ola Persson, Martin Doble, Hans GraberBjoern Lund, Vernon Squire, Johannes Gemmrich, Susanne Lehner, Benjamin Holt, Mike Meylan, John Brozena, Jean Raymond Bidlot

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

The sea state of the Beaufort and Chukchi seas is controlled by the wind forcing and the amount of ice-free water available to generate surface waves. Clear trends in the annual duration of the open water season and in the extent of the seasonal sea ice minimum suggest that the sea state should be increasing, independent of changes in the wind forcing. Wave model hindcasts from four selected years spanning recent conditions are consistent with this expectation. In particular, larger waves are more common in years with less summer sea ice and/or a longer open water season, and peak wave periods are generally longer. The increase in wave energy may affect both the coastal zones and the remaining summer ice pack, as well as delay the autumn ice-edge advance. However, trends in the amount of wave energy impinging on the ice-edge are inconclusive, and the associated processes, especially in the autumn period of new ice formation, have yet to be well-described by in situ observations. There is an implicit trend and evidence for increasing wave energy along the coast of northern Alaska, and this coastal signal is corroborated by satellite altimeter estimates of wave energy.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalOcean Modelling
Volume105
DOIs
StatePublished - Sep 1 2016

Keywords

  • Arctic Ocean
  • Ocean surface waves
  • Sea ice

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • Oceanography
  • Geotechnical Engineering and Engineering Geology
  • Atmospheric Science

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