Project “Why is the deep Arctic Ocean Warming? (WAOW)”, funded by Vetenskapsrådet grant 2018-03859
Ca 4 million SEK; I am the PI (single applicant; early career grant)
Started in January 2019, finishes in December 2023

The aim of this project is to finally determine the path and variability of the deep waters of the Arctic Ocean, from 2000 m to the sea floor, using notably data that we collected during the international MOSAiC expedition (2020) and the Synoptic Arctic Survey (2021).

Team:

• Myself – this research area is my primary focus;
• PhD student Salar Karam, of which I am the main supervisor, October 2019 to March 2024;
• Maren Walters from Uni Bremen, for expertise with CFC analysis;
• Collaboration with the wider MOSAiC Team Ocean and the Swedish Synoptic Arctic Survey consortium.

Publications:

The analyses have been delayed by covid19 closing the Uni Bremen lab and postponing the Synoptic Arctic Survey expedition. Nevertheless:

• Assessment of biases in the modelled Arctic Ocean [38] and consequences on predictions of its changes [37]. The release of these studies generated a lot of media attention from 13th March 2023 (see a selection here).
• Collaboration with biologists, where we show a clear relationship in the central Arctic between water masses and ecosystem abundance and diversity: [30]
• Overviews of the MOSAiC expedition: Atmosphere [28], Snow and Sea Ice [27], and Physical Oceanography [29]
• Review of the state of the Arctic Ocean, highlighting changes in the freshwater cycle and which components of the climate system are still too poorly observed to conclude: [24]

Conference, seminar, or outreach presentations related to this project:

• 5 May 2023, University of East Anglia (UK)
  Salar Karam, invited seminar: Critically important, yet forgotten: thin and transient meltwater layers and false bottoms in the Arctic sea ice pack
• 18 April 2023, University of Bremen (Germany)
  Céline Heuzé, seminar: The deep Arctic Ocean – not as isolated as you’d think
• 30 March 2023, University of Gothenburg (Sweden)
  Salar Karam, seminar: Deep ocean dynamics in the Arctic Ocean
• 5-10 March 2023, Gordon Research Conference on Polar Marine Science, Ventura (US)
  Salar Karam, poster: Bottom temperature data observed from autonomous buoys deployed during MOSAiC
• 13-17 February 2023, MOSAiC Science Conference, Boulder (US)
  Salar Karam, poster: Bottom temperature data observed from autonomous buoys deployed during MOSAiC
• 23-27 May 2022, EGU22, Vienna (Austria)
  Céline Heuzé, award lecture: Global deep waters: what we know, what we know we do not know, and what we should do about it
  Céline Heuzé, talk: Large biases in hydrography and circulation of the Arctic Ocean in CMIP6 models
• 16-18 May 2022, Swedish Climate Symposium, Norrköping (Sweden)
  Céline Heuzé, talk: Large biases in hydrography and circulation of the Arctic Ocean in CMIP6 models
• 25-29 April 2022, International MOSAiC Science Conference/Workshop, Potsdam (Germany)
  Céline Heuzé, plenary talk: OCEAN overview
  Céline Heuzé, talk: Water mass history from transient tracers to map species movements
  Salar Karam, poster: Observations of a Freshwater Lens during MOSAiC
• 28 October 2021, Geoseminar, Göteborgs University (Sweden)
  Céline Heuzé, seminar: Why is the Arctic Ocean so wrong in CMIP models?
• 20 October 2021, MOSAiC’s Team ECO workshop (online)
  Céline Heuzé, requested talk: Physical Oceanography during MOSAiC: first results
• 12 October 2021, ArcTrain annual meeting (online)
  Céline Heuzé, invited lecture: Why is the Arctic so wrong in CMIP models?
• 19-30 April 2021, EGU21 (online)
  Salar Karam, talk: Recirculation of Canadian Basin Deep Water in the Amundsen Basin
• 2 February 2021, Arctic Frontiers (online)
  Céline Heuzé, keynote presentation: The first full-depth hydrography of the Eurasian basin
• 9 December 2020, APECS Sweden mini-conference, Göteborg (Sweden)
  Salar Karam, talk: Conducting field work during a pandemic
• 1 October 2020, US IARPC (online)
  Céline Heuzé, requested talk: Physical Oceanography during MOSAiC – an overview
• 24 January 2020, Lamont Doherty Earth Observatory (online)
  Céline Heuzé, seminar: Deep waters: what we know, what we do not know and what we are doing about it
• 22 October 2019, Fonster mot naturvetenskap, Göteborg (Sweden)
  Céline Heuzé, talk: Livet ombord en isbrytare… utan internet
• 4 October 2019, University of East Anglia (UK)
  Céline Heuzé, seminar: Deep waters: what we know, what we do not know and what we are doing about it. (a.k.a. “Big Boats and Big Data”)