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:
 

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:
 

Teaching and Supervision

PhD students: Will Stewart, Bangor University (from September 2022)

Recent Phd Students:  Ben Barton, Universite de Bretagne Occidentale &. Jess Mead Silvester, Bangor University

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

Grant Awards 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) 

 

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. 

Other

QUICCHE: QUantifying Interocean fluxes in the Cape Cauldron Hotspot of Eddy kinetic energy

Project webpage: https://beal-agulhas.earth.miami.edu/research/projects/quicche/index.html

 

Education / academic qualifications

  • 2006 - PhD , Observations of Antarctic Circumpolar Current Dynamics and Small-scale variability near the Antarctic peninsula
  • 1998 - MSc , Medical Radiation Physics
  • 1997 - MA , EXPERIMENTAL AND THEORETICAL PHYSICS

Research outputs (29)

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Prof. activities and awards (19)

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Accolades (2)

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Projects (6)

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Media coverage (7)

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