Research Portal

Professor Yueng-Djern Lenn

Professor in Physical Oceanography

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ORCID: 0000-0001-6031-523X

Contact info

311 Craig Mair 
School of Ocean Sciences
Bangor University, Wales
Menai Bridge LL59 5AB
UK
 
tel:+44 1248388658
e-mail:y.lenn AT bangor.ac.uk
 
I am a polar physical oceanographer and my interests lie in understanding the physical processes integral to ocean overturning that impact climate in the polar oceans. My Southern Ocean research has focused on Drake Passage eddy heat and momentum fluxes, the surface Ekman layer that constitute the upper limb of the overturning circulation, and diapycnal mixing driving water mass transformation in the thermocline at the Antarctic continental slope. My Arctic research focuses on water mass transformations occurring in the continental shelf seas and along the Arctic continental slope that link the Arctic to the global overturning circulation, most recently investigating the role of different mixing mechanisms (i.e. double diffusion and turbulent mixing drive by tides or winds) in fluxing heat and other properties from the warm Atlantic Water into overlying Arctic halocline and mixed layer.   
 
I am also the schools liason for the School of Ocean Sciences, co-ordinating most school visits to Ocean Sciences by schools as well as providing support for colleagues who visit schools.  Other outreach events I support include school STEM Careers Fairs and other Science Fairs.  These activities include events organised in partnership with STEMCymru and other similar organisations seeking to promote STEM in Wales and beyond. 
 
Research Area:
 
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  1. Article › Research › Peer-reviewed
  2. Published

    A 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

  3. Published

    An Ice-Ocean Model Study of the Mid-2000s Regime Change in the Barents Sea

    Barton, B., Lique, C., Lenn, Y.-D. & Talandier, C., 3 Nov 2022, In: Journal of Geophysical Research: Oceans. 127, 11, e2021JC018280.

    Research output: Contribution to journal › Article › peer-review

  4. Published

    Can 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

  5. Published

    Eastern 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

  6. Published

    Eddies 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

  7. Published

    Impact 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

  8. Published

    Improving 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

  9. Published

    Increasing 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

  10. Published

    Intermittent 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

  11. Published

    Kara 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

  12. Published

    Mean 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

  13. Published

    Mooring-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

  14. Published

    Near-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

  15. Published

    Observations 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

  16. Published

    Observations 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

  17. Published

    Observed 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

  18. Published

    On 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

  19. Published

    On 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

  20. Published

    Semidiurnal 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

  21. Published

    Shear 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

  22. Published

    Shifts from surface density compensation to projected warming, freshening and stronger stratification in the subpolar North Atlantic

    Marsh, R., Dey, D., Lenn, Y.-D. & Roberts, E. M., 17 Jul 2024, In: Climate Dynamics. 62, 8, p. 8227-8253 27 p.

    Research output: Contribution to journal › Article › peer-review

  23. Published

    Tide-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

  24. Published

    Vertical 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

  25. Published

    Water 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

  26. Published

    Wind-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 Sept 2016, In: Geophysical Research Letters. 43, 18, p. 9749-9756

    Research output: Contribution to journal › Article › peer-review

  27. Chapter › Research › Not peer-reviewed
  28. Published

    Introducing the Oceans

    Lenn, Y.-D., Nehama, F. & Mavume, A., 13 Sept 2022, Journey Through Tides. Green, M. & Duarte, J. (eds.). Elsevier

    Research output: Chapter in Book/Report/Conference proceeding › Chapter

  29. Chapter › Research › Peer-reviewed
  30. Published

    Mixing in the Arctic Ocean

    Lenn, Y.-D., Fer, I., Timmermans, M.-L. & MacKinnon, J. A., 5 Oct 2021, Ocean Mixing: Drivers, Mechanisms, Impacts. Meredith, M. & Garabato, A. (eds.). Elsevier, p. 275-299

    Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

  31. Conference contribution › Research › Peer-reviewed
  32. Published

    The 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

  33. Book › Research › Not peer-reviewed
  34. Published

    30-Second Oceans

    Lenn, Y.-D. (Editor) & Green, M. (Editor), 21 Mar 2021, The Ivy Press. 160 p. (30-Second....)

    Research output: Book/Report › Book