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Kevin Wiegand

Tel: +49 (0)421 218-62164
Fax: +49 (0)421 218-62165
Email: kwiegand [at] uni-bremen.de
ORCID: https://orcid.org/0000-0003-3905-0171

Research Interests

Horizontal and vertical mixing processes between Greenland shelf and subpolar North Atlantic
Freshwater entrainment into the ocean from melting glaciers and sea-ice
Deep convection in Labrador and Irminger sea
Watermass transprots in the North Atlantic
Seasonal and long-term variability of Irminger Water
Seasonal impact of Irminger Sea convection on Irminger Water
Long-term imact of subpolar gyre changes on Irminger Water
Exchange processes between ocean and atmosphere

PhD Projekt
The PhD project is part of the project HB-07 “Impacts of cross-shelf oceanic exchange in the subpolar North Atlantic on melting of the Greenland Ice Sheet” within the framework of the International Research Training Group ArcTrain “Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic”. The Arctic and subarctic regions are vulnerable to global warming, for example to an accelerated loss of mass from Greenland’s ice sheet. A quarter of the presently observed global sea-level rise is attributed to this mass loss and the associated freshwater input into the ocean. The North Atlantic Current and its northwest continuation, the Irminger Current, are the most prominent oceanic supplier of subtropical heat and salt to the subpolar North Atlantic. The subpolar North Atlantic is warming and causes enhanced submarine melting of the Greenland glaciers, with crucial consequences for the living conditions of arctic communities and their economy. The aim of the project is thus to address the present day oceanic exchange between the ocean interior and the shelf and vice versa on the eastern and western sides of Greenland based on observations and a comparison to high-resolution models and to assess its impact on melting of the Greenland Ice.

PhD Projekt

The PhD project is part of the project HB-07 “Impacts of cross-shelf oceanic exchange in the subpolar North Atlantic on melting of the Greenland Ice Sheet” within the framework of the International Research Training Group ArcTrain “Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic”.

The Arctic and subarctic regions are vulnerable to global warming, for example to an accelerated loss of mass from Greenland’s ice sheet. A quarter of the presently observed global sea-level rise is attributed to this mass loss and the associated freshwater input into the ocean. The North Atlantic Current and its northwest continuation, the Irminger Current, are the most prominent oceanic supplier of subtropical heat and salt to the subpolar North Atlantic. The subpolar North Atlantic is warming and causes enhanced submarine melting of the Greenland glaciers, with crucial consequences for the living conditions of arctic communities and their economy.

The aim of the project is thus to address the present day oceanic exchange between the ocean interior and the shelf and vice versa on the eastern and western sides of Greenland based on observations and a comparison to high-resolution models and to assess its impact on melting of the Greenland Ice.

Curriculum Vitae
since 09/2019	Scientist (PhD student), Institute of Environmental Physics and MARUM – Center for Marine Environmental Sciences, University of Bremen, Germany
2015-2019	Studies in Physical Oceanography, Universität Hamburg, Degree: M.Sc.
2012-2015	Studies in Geophysics/Oceanography, Universität Hamburg, Degree: B.Sc.

Projects
since 09/2019	Member of the international Research Training Group ArcTrain
since 10/2019	Member of the Bremen International Graduate School for Marine Sciences GLOMAR

Publications
Kieke, D., K. Bulsiewicz, C. Gapp, Y. Hinse, O. Huhn, B. Holanda, A. Hunkemöller, S. Kinne, M. Köllner, L. Krisztian, O. Krüger, I. Leimann, M. Pöhlker, A. Schneehorst, A. Smirnov, R. Steinfeldt, M. Stelzner, J. Stiehler, T. Svensson, S. Wett, and K. N. Wiegand (2021), AMOC Components at 47°N, Cruise No. M164 (GPF-19-1-105), June 23 - July 31, 2020, Emden (Germany) - Emden (Germany), METEOR-Berichte, Gutachterpanel Forschungsschiffe, doi:10.48433/cr_m164.
Wiegand, K. N., J. Baehr, and S. Brune, 2019. Predictability of Multiyear Trends of the Pacific Decadal Oscillation in an MPI-ESM Hindcast Ensemble. GRL, 46 318 - 325, doi:10.1029/2018GL080661.
Wiegand, K. N., 2018. Variability and predictability of the Madden-Julian Oscillation in a coupled ocean-atmosphere model. Master’s Thesis, Universität Hamburg.
Kieke, D., R. Arruda Monteiro da Silva, K. Azetsu-Scott, N. Binnemann, A. Buinyi, K. Bulsiewicz, C. Feucher, O. Huhn, M. Köllner, G. Martínez Méndez, H. Nowitzki, J. Oelsmann, A. Röhler, N. Rohlfs, A. Schneehorst, R. Steinfeldt, H.-H. Uhde, K. Wiegand, and F. Wischnewski, 2019. Subpolar Gyre Variability, Cruise No. MSM73, April 06 - May 22, 2018, Cádiz (Spain) - St. John's (Canada). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, doi:10.2312/cr_msm73.
Kieke, D., W. Böke, S. Büttner, K. Bulsiewicz, C. Danek, T. Hempel, D. Khordakova, B. Mirau, A. Rochner, A. Roessler, N. Rohlfs, A. Schneehorst, R. Steinfeldt, P. Sültenfuß, H.-H. Uhde, S. Wett, K. Wiegand, and F. Wischnewski, 2018. Subpolar Gyre Variability, Cruise No. MSM53, March 31 - May 09, 2016, Kiel (Germany) - St. John's (Canada). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, doi:10.2312/cr_msm53.
Kieke, D, R. Barbosa Primon, K. Bulsiewicz, C. Gjerdrum, K. Jochumsen, J. Meyerjürgens, M. Moritz, V. Müller, C. Rieper, A. Rochner, P. Sültenfuß, L. Tiemann, E. Varotsou, A. Welsch, S. Wett, K. Wiegand, J. Winkel, and F. Wischnewski, 2016. FLEPVAR 2015 (Variability in Flemish Pass), Cruise No. MSM42, May 2 - May 22, 2015 - Bermuda - St. John's (Canada). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, doi:10.2312/cr_msm42.
Wiegand, K. N., 2015. Multi-year predictability of the basin-wide upper-ocean heat content in a hindcast ensemble simulation with MPI-ESM. Bachelor’s Thesis, Universität Hamburg.

Presentations
Wiegand, K. N., D. Kieke, and P. G. Myers (2022), Irminger Water to the west of Greenland is seasonally replaced with colder and fresher upper Irminger Sea Intermediate Water, Ocean Sciences Meeting 2022 (online).
Wiegand, K. N., D. Kieke, and P. G. Myers (2021), Irminger Water is significantly impacted by winter deep convection on seasonal and by the subpolar gyre on long-term time scales, 19th ASOF-ISSG Meeting (online).
Wiegand, K. N., D. Kieke, and P. G. Myers (2021), Reconstructing Irminger Water variability within the past three decades, EGU General Assembly, Vienna, Austria (online).
Wiegand, K. N., D. Kieke, and P. G. Myers (2021), Reconstructing Irminger Water variability within the past three decades, Arctic Science Summit Week, Lisboa, Portugal (online).
Wiegand, K. N., D. Kieke, and P. G. Myers (2020), Decadal variability of Irminger Water in the eastern Labrador Sea, 18th ASOF-ISSG Meeting, Hafnarfjördur, Iceland (online).

Scientific Posters
2022, May - ArcTrain annual Meeting 2022, Orford, Kanada About Irminger Water and where to ﬁnd it.
2021, October - ArcTrain Annual Meeting 2021, Etelsen, Germany Irminger Water is significantly impacted by winter deep convection on seasonal and by the subpolar gyre on long-term time scales.
2020, October - ArcTrain Annual Meeting 2020, Bremen, Germany Back to the Future - Reconstructing Irminger Water changes within the past 30 years.
2020, February - OSM2020, San Diego, USA Exchange of water mass properties between the Greenland shelf and the surrounding subpolar North Atlantic.
2017, September - 4ICESM, Hamburg. Predictability of multi-year SST trends in the North Pacific in an MPI-ESM hindcast ensemble.
2016, September – DAMES, Hamburg. Multi-year predictability of upper ocean heat content and sea surface temperature in an MPI-ESM hindcast ensemble initialized by an oceanic EnKF.

Participation in Scientific Cruises

RV Meteor, M164	Subpolar North Atlantik	Jun - Jul 2020	Emden, Germany - Emden, Germany	PI: D. Kieke
RV Atair, 06A7006-1	Eastern North Atlantic	Jun 2020	Bremerhaven, Germany - Bremerhaven, Germany	PI: K. Jochumsen
RV Polarstern, PS118	Weddell Sea and Powell Basin	Feb - Apr 2019	Punta Arenas, Chile - Punta Arenas, Chile	PI: B. Dorschel
RV Maria S. Merian, MSM-73	Subpolar North Atlantic and Labrador Sea	Apr - May 2018	Cadiz, Spain - St. John's, Canada	PI: D. Kieke
RV Pelagia, 64PE426	Denmark Strait	Sep 2017	Reykjavik, Iceland - Reykjavik, Iceland	PI: K. Jochumsen
RV Maria S. Merian, MSM-53	Subpolar North Atlantic	Mar - May 2016	Kiel, Germany - St. John's, Canada	PI: D. Kieke
RV Maria S. Merian, MSM-42	Newfoundland Basin	May 2015	Bemuda - St. John's, Canada	PI: D. Kieke

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