Dr Yueng-Djern Lenn
Reader in Physical Oceanography
Additional Contact Information
Qualifications
- PhD: Observations of Antarctic Circumpolar Current Dynamics and Small-scale variability near the Antarctic peninsula
Scripps Institution of Oceanography, La Jolla, 2006 - MSc: Medical Radiation Physics
University College London, 1998 - MA: EXPERIMENTAL AND THEORETICAL PHYSICS
Cambridge University, 1997
Teaching and Supervision
Current Phd Students: Ben Barton, Universite de Bretagne Occidentale
Current modules:
ONS1001: Environmental Data & Analysis
DXX1005: Earth Systems & Processes
OSX1005: Introducing the Oceans
OSX2005: Earth and Ocean Observation
OSX2006: TIdes, Waves & Sampling
OSX3002: Marine Ecosystems & Processes
OSX4010: Key Concepts & Techniques
OSX4012: Practical Oceanography
OSX4015: Climate & Climate Change
OSX4408: Field and Lab Oceanography
Postgraduate Project Opportunities
The PhD projects I propose usually stem from my current research interests and focus mainly on processes that drive fluxes of heat, freshwater and momentum within the polar ocean and between the ocean, cryosphere and atmosphere. Past students have studied how tidal forcing drives vertical fluxes of heat from Upper Circumpolar Deep Water into the surrounding colder fresher Antarctic-source waters along the Antarctic Peninsular continental slope, as welll as how warm Atlantic Water is contributing to sea ice loss in the Arctic Barents Sea. I have also supervised projects studying wind-driven mixing at the base of the open ocean mixed-layer and the role of wind-forcing in driving Arctic mixing.
Publications
2022
- PublishedEddies and the distribution of Eddy Kinetic Energy in the Arctic Ocean
von Appen, W., Baumann, T. M., Janout, M., Koldunov, N., Lenn, Y-D., Pickart, R., Scott, R. & Wang, Q., 27 Apr 2022, In: Oceanography. 35, 2
Research output: Contribution to journal › Article › peer-review - PublishedImpact of acoustic Doppler current profiler (ADCP) motion on structure function estimates of turbulent kinetic energy dissipation rate
Scannell, B., Lenn, Y-D. & Rippeth, T., 3 Feb 2022, In: Ocean Science. 18, 1, p. 169–192
Research output: Contribution to journal › Article › peer-review - PublishedIncreasing nutrient fluxes and mixing regime changes in the eastern Arctic Ocean
Shultz, K., Lincoln, B., Povazhnyy, V., Rippeth, T., Lenn, Y-D., Janout, M., Alkire, M., Scannell, B. & Torres-Valdes, S., 16 Mar 2022, In: Geophysical Research Letters. 49, 5, e2021GL096152.
Research output: Contribution to journal › Article › peer-review
2021
- PublishedA warm Jet in a cold ocean
MacKinnon, J., Lenn, Y-D., Simmons, H. L., Hargrove, J., Thomson, J., Peacock, T., Alford, M. H., Barton, B. I., Boury, S., Brenner, S. D., Couto, N., Danielson, S. L., Fine, E. C., Graber, H. C., Guthrie, J., Hopkins, J. E., Jayne, S. R., Jeon, C., Klenz, T., Lee, C. M., Lucas, A. J., Lund, B., Mahaffey, C., Norman, L., Rainville, L., Smith, M. M., Thomas, L. N., Torres-Valdes, S. & Wood, K. R., 23 Apr 2021, In: Nature Communications. 12, 1, p. 2418
Research output: Contribution to journal › Article › peer-review - PublishedOn the Along-Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean
Schulz, K., Janout, M. A., Lenn, Y-D., Castillo, E. R., Polyakov, I., Mohrholz, V., Tippenhauer, S., Reeve, K., Holemann, J., Rabe, B. & Vredenborg, M., Feb 2021, In: Journal of Geophysical Research: Oceans. 126, 2, e2020JC016375.
Research output: Contribution to journal › Article › peer-review
2020
- PublishedWater mass properties derived from satellite observations in the Barents Sea
Barton, B., Lique, C. & Lenn, Y-D., Aug 2020, In: Journal of Geophysical Research: Oceans. 125, 8, e2019JC015449.
Research output: Contribution to journal › Article › peer-review
2019
- PublishedEastern Arctic Ocean diapycnal heat fluxes through large double-diffusive steps
Polyakov, I. V., Padman, L., Lenn, Y-D., Pnyushkov, A., Rember, R. & Ivanov, V. V., 4 Jan 2019, In: Journal of Physical Oceanography. 49, 1, p. 227-246
Research output: Contribution to journal › Article › peer-review - PublishedOn the Future of Argo: A Global, Full-Depth, Multi-Disciplinary Array
Roemmich, D., Alford, M. H., Claustre, H., Johnson, K., King, B., Moum, J., Oke, P., Owens, W. B., Pouliquen, S., Purkey, S., Scanderbeg, M., Suga, T., Wijffels, S., Zilberman, N., Bakker, D., Baringer, M., Belbeoch, M., Bittig, H. C., Boss, E., Calil, P., Carse, F., Carval, T., Chai, F., Conchubhair, D. Ó., d’Ortenzio, F., Dall’Olmo, G., Desbruyeres, D., Fennel, K., Fer, I., Ferrari, R., Forget, G., Freeland, H., Fujiki, T., Gehlen, M., Greenan, B., Hallberg, R., Hibiya, T., Hosoda, S., Jayne, S., Jochum, M., Johnson, G. C., Kang, K., Kolodziejczyk, N., Körtzinger, A., Traon, P-Y. L., Lenn, Y-D., Maze, G., Mork, K. A., Morris, T., Nagai, T., Nash, J., Garabato, A. N., Olsen, A., Pattabhi, R. R., Prakash, S., Riser, S., Schmechtig, C., Schmid, C., Shroyer, E., Sterl, A., Sutton, P., Talley, L., Tanhua, T., Thierry, V., Thomalla, S., Toole, J., Troisi, A., Trull, T. W., Turton, J., Velez-Belchi, P. J., Walczowski, W., Wang, H., Wanninkhof, R., Waterhouse, A. F., Waterman, S., Watson, A., Wilson, C., Wong, A. P. S., Xu, J. & Yasuda, I., 2 Aug 2019, In: Frontiers in Marine Science. 6, 439
Research output: Contribution to journal › Article › peer-review - PublishedThe Increasing Prevalence of High Frequency Internal Waves in an Arctic Ocean With Declining Sea Ice Cover
Rippeth, T., Vlasenko, V., Stashchuk, N., Koslov, I., Scannell, B., Green, M., Lincoln, B. & Lenn, Y-D., 11 Nov 2019, ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, OMAE2019-96621
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
2018
- PublishedObserved atlantification of the Barents Sea causes the Polar Front to limit the expansion of winter sea ice
Barton, B., Lenn, Y-D. & Lique, C., 15 Aug 2018, In: Journal of Physical Oceanography.
Research output: Contribution to journal › Article › peer-review
2016
- PublishedWind-driven mixing at intermediate depths in an ice-free Arctic Ocean
Lincoln, B., Rippeth, T., Lenn, Y-D., Timmermans, M-L., Willaims, W. & Bacon, S., 28 Sep 2016, In: Geophysical Research Letters. 43, 18, p. 9749-9756
Research output: Contribution to journal › Article › peer-review
2015
- PublishedKara Sea freshwater transport through Vilkitsky Strait: Variability, forcing, and further pathways toward the western Arctic Ocean from a model and observations
Janout, M. A., Aksenov, Y., Holemann, J. A., Rabe, B., Schauer, U., Polyakov, I. V., Bacon, S., Coward, A. C., Karcher, M., Lenn, Y., Kassens, H. & Timokhov, L., 18 Jul 2015, In: Journal of Geophysical Research: Oceans. 120, 7, p. 4925-4944
Research output: Contribution to journal › Article › peer-review - PublishedTide-mediated warming of Arctic halocline by Atlantic heat fluxes over rough topography
Rippeth, T. P., Lincoln, B. J., Lenn, Y. D., Green, J. A., Sundfjord, A. & Bacon, S., Mar 2015, In: Nature Geoscience. 8, 3, p. 191-194
Research output: Contribution to journal › Article › peer-review
2014
- PublishedObservations of a diapycnal shortcut to adiabatic upwelling of Antarctic Circumpolar Deep Water
Silvester, J. M., Lenn, Y. D., Polton, J. A., Rippeth, T. P. & Maqueda, M. M., 25 Nov 2014, In: Geophysical Research Letters. 41, 22, p. 7950-7956
Research output: Contribution to journal › Article › peer-review - PublishedSemidiurnal Tides on the Laptev Sea Shelf with Implications for Shear and Vertical Mixing
Janout, M. A. & Lenn, Y. D., 8 Jan 2014, In: Journal of Physical Oceanography. 44, 1, p. 202-219
Research output: Contribution to journal › Article › peer-review
2013
- PublishedCan Drake Passage Observations Match Ekman's Classic Theory?
Polton, J. A., Lenn, Y., Elipot, S., Chereskin, T. K. & Sprintall, J., 1 Aug 2013, In: Journal of Physical Oceanography. 43, 8, p. 1733-1740
Research output: Contribution to journal › Article › peer-review - PublishedShear at the Base of the Oceanic Mixed Layer Generated by Wind Shear Alignment
Brannigan, L., Lenn, Y. D., Rippeth, T. P., McDonough, E., Chereskin, T. K. & Sprintall, J., 1 Aug 2013, In: Journal of Physical Oceanography. 43, 8, p. 1798-1810
Research output: Contribution to journal › Article › peer-review
2012
- PublishedMooring-Based Observations of Double-Diffusive Staircases over the Laptev Sea Slope
Polyakov, I. V., Pnyushkov, A. V., Rember, R., Ivanov, V. V., Lenn, Y. D., Padman, L. & Carmack, E. C., 1 Jan 2012, In: Journal of Physical Oceanography. 42, 1, p. 95-109
Research output: Contribution to journal › Article › peer-review
2011
- PublishedIntermittent intense turbulent mixing under ice in the Laptev Sea continental shelf.
Lenn, Y., Rippeth, T. P., Old, C., Bacon, S., Polyakov, I., Ivanov, V. & Holemann, J., 1 Mar 2011, In: Journal of Physical Oceanography. 41, 3, p. 531-547
Research output: Contribution to journal › Article › peer-review - PublishedNear-Surface Eddy Heat and Momentum Fluxes in the Antarctic Circumpolar Current in Drake Passag
Lenn, Y-D., Chereskin, T., Sprintall, J. & McClean, J., 1 Jul 2011, In: Journal of Physical Oceanography. 41, 7, p. 1385-1407
Research output: Contribution to journal › Article › peer-review
2009
- PublishedObservations of Ekman currents in the southern ocean.
Lenn, Y. D. & Chereskin, T. K., 1 Mar 2009, In: Journal of Physical Oceanography. 39, 3, p. 768-779
Research output: Contribution to journal › Article › peer-review - PublishedVertical mixing at intermediate depths in the Arctic boundary current.
Lenn, Y. D., Wiles, P. J., Torres-Valdes, S., Abrahamsen, E. P., Rippeth, T. P., Simpson, J. H., Bacon, S., Laxon, S. W., Polyakov, I., Ivanov, V. & Kirillov, S., 3 Mar 2009, In: Geophysical Research Letters. 36, p. L05601
Research output: Contribution to journal › Article › peer-review
2008
- PublishedImproving estimates of the Antarctic circumpolar current streamlines in Drake Passage.
Lenn, Y. D., Chereskin, T. K. & Sprintall, J., 1 May 2008, In: Journal of Physical Oceanography. 38, 5, p. 1000-1010
Research output: Contribution to journal › Article › peer-review
2007
- PublishedMean Jets, mesoscale variability and eddy momentum fluxes in the surface layer of the Antarctic Circumpolar Current in Drake Passage
Lenn, Y-D., Chereskin, T., Sprintall, J. & Firing, E., 1 Jan 2007, In: Journal of Marine Research. 65, 1, p. 27 58 p.
Research output: Contribution to journal › Article › peer-review
Activities
2020
- ATOMIX working group (External organisation)
Funded by the Scientific Committee on Ocean Research to chair the Analysing ocean turbulence observations to quantify mixing (ATOMIX) working group
1 Jan 2020 – 12 Dec 2020
Links:
Activity: Membership of board (Chair)
2019
- Arctic Mixing Workshop
16 Oct 2019 – 18 Oct 2019
Activity: Participation in workshop, seminar, course (Speaker)
Projects
-
Quantifying inter-ocean fluxes in the Cape Cauldron of high EKE (QUICCHE)
01/05/2022 – 31/05/2027 (Active)
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14/11/2020 – 13/12/2023 (Active)
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Primary productivity driven by escalating nutrient fluxes?
01/07/2018 – 28/05/2022 (Finished)
-
IIGLOOS: Interactions at the interface of glaciology, oceanography and sea ice
01/05/2016 – 01/08/2017 (Finished)
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01/09/2010 – 05/09/2016 (Finished)
Other Grants and Projects
2018-2021 NERC Changing Arctic Ocean: Primary productivity driven by escalating Arctic nutrient fluxes? (Lead Principle Investigator, Lenn)
2010-2015 NERC Postdoctoral Fellowship Principle Investigator
2011-2016 TEA-COSI:The Environment of the Arctic: Climate, Ocean and Sea-Ice UK NERC Consortium: Including Lenn (Project Partner, Bangor.)
2012-2015 Upper ocean heat flux in the Eurasian Basin: Oceanic thermodynamic forcing contributing to Arctic ice loss. USA National Science Foundation grant including Lenn (Project Partner, Bangor)