Professor John Simpson
BA (Oxon) PhD DSc (Liv)
- Emeritus Professor
- Room: Nautilus 324 Westbury Mount
- Phone: +44 1248 382844
- E-mail: email@example.com
BiographyI am Professor of Physical Oceanography in the School of Ocean Sciences, Bangor University which has been my base for many years. I am a seagoing Oceanographer with an enthusiasm for making new measurements to test theories and models but I also get involved in theoretical developments and enjoy the challenge of inter-disciplinary studies.
Research InterestsI have a broad range of interests in the physical processes that control I have a broad range of interests in the physical processes that control the environment in shelf seas and estuaries and their impact on biological and sediment processes in the water column. In particular, I have contributed to the study of
(i) the interaction between buoyancy input and tidal stirring and the resulting tidal mixing fronts and
(ii) the effects of freshwater input to estuaries and the shelf seas. Currently I am much involved with my research group in making innovative measurements of turbulent processes in the shelf seas and in lakes and using the results to test hypotheses and models of vertical mixing. I am also trying to apply understanding, acquired in the European shelf seas, to gain insight into the workings of other shelf sea regimes such as those in polar regions and in the tropics.
- Circulation and Mixing in Fjords and Sea-Lochs
- Regions of Freshwater Influence
- Physical and Biological Processes in the Shelf Sea Seasonal Thermocline
- Near-inertial currents in continental shelf seas
- Management of sustainable mussel aquaculture
- The structure of turbulence in shelf seas
- Turbulence and Mixing
Research Grants Awarded
Primary Production and Turbulence (with SOES Southampton)
The Structure of turbulence in shelf seas
FASTNEt( Fluxes Across the Sloping Topography of the North East Atlantic) Consortium
PROFILE (study of European Regions Of Freshwater Influence ROFIs)
PROVESS (Processes Of Vertical Exchange in Shelf Seas)
FANS (Fluxes Across Narrow Shelves)
OARRE ( Oceanographic Applications to Regions of Restricted Exchange (fjords))
MABENE Consortium (Flow and feeding rates over mussel beds), 2002-2005
Peer Reviewed Journal Papers
Lucas, N. S. , Simpson, J. H., Rippeth, T. P. and Old, C. P. (2014)
Measuring turbulent dissipation using a tethered ADCP. Journal of Atmospheric and Oceanic Technology. 31 (8). pp. 1826-1837.
Markull, K; Silva, JDLE; Simpson, JH; Dias, JM (2014).
The influence of the Maputo and Incomati rivers on the mixing and outflow of freshwater from Maputo Bay (Mozambique). Journal of Coastal Research, 70, 580-585.
Robins, P.E., Lewis, M.J., Simpson, J.H., and Malham, S.K. 2014
Future variability of solute transport in a macrotidal estuary. Estuarine, Coastal and Shelf Science, 151 88-99
Simpson J. H., Lucas N., Powell B. and Maberly S.C., 2014.
Dissipation and mixing during the onset of stratification in a temperate lake, Windermere. Limnology and Oceanography, 60, 29-41.
Palmer, M. R., Polton, J., Inall, M. E., Rippeth, T. P., Green, J. A. M, Sharples, J. and Simpson, J. H. 2013
Variable behavior in pycnocline mixing over shelf seas. Geophysical Research Letters, 40, doi:10.1029/2012GL054638.
Simpson, J.H. and R.R. McCandliss(2013)
The Ekman Drain: a conduit to the deep ocean for shelf material has now been published in the following paginated issue of Ocean Dynamics: Volume 63, Issue 9 (2013), Page 1063-1072
Hyder P., Simpson JH, Xing J.; et al. (2011).
Observations over an annual cycle and simulations of wind-forced oscillations near the critical latitude for diurnal-inertial resonance. Continental Shelf Research, 31(15), 1576-1591.
Simpson, J.H., P.J. Wiles and B.J. Lincoln,(2011)
Internal seiche modes and bottom boundary-layer dissipation in a temperate lake from acoustic measurements. Limnology and Oceanography 56 (5), 1893-1906
Verspecht, F., J. H. Simpson, and T. P. Rippeth (2010).
Semi-diurnal tidal ellipse variability in a region of freshwater influence. Geophys. Res. Lett., 37, L18602, doi:10.1029/2010GL044470.
Fangli Qiao, Dejun Dai, John Simpson, Harald Svendsen (2010)
Banded structure of drifting macroalgae, Marine Pollution Bulletin, doi:10.1016/j.marpolbul.2009.08.006
Green, J. A. M., J.H.Simpson, S.A.Thorpe and T.P.Rippeth (2009).
Observations of internal tidal waves in the isolated seasonally stratified region of the western Irish Sea. Continental Shelf Research, doi:10.1016/j.csr.2009.11.004
J Sharples, CM Moore, AE Hickman, PM Holligan, JF Tweddle, MR Palmer, JH Simpson (2009).
Internal tidal mixing as a control on continental margin ecosystems Geophys. Res. Lett., Vol. 36, No. 23, L23603.
Verspecht, F., Rippeth, T. P., Simpson, J. H., Souza, A. J., Burchard, H. and Howarth, M. J. (2009)
Residual circulation and stratification in the Liverpool Bay region of freshwater influence. Ocean Dynamics, 59, 765-779
Verspecht, F., T. P. Rippeth, M. J. Howarth, A. J. Souza, J. H. Simpson, and H. Burchard (2009),
Processes impacting on stratification in a region of freshwater influence: Application to Liverpool Bay, J. Geophys. Res., 114, C11022
Yueng-Djern Lenn, 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. (2009)
Vertical mixing at intermediate depths in the Arctic boundary current. Geophysical Research Letters, 36 (5). 5, pp. doi:10.1029/2008GL036792
J. H. Simpson, J. A. M. Green, T. P. Rippeth, T. R. Osborn, W. A. M. Nimmo-Smith (2009).
The structure of dissipation in the western Irish Sea front. Journal of Marine Systems, 77, 428-440.
Simpson J.H.and J.P.Tinker 2009
A test of the influence of tidal stream polarity on the structure of turbulent dissipation. Continental Shelf Research 29(1) 320-332
Green, J. A. M., Simpson, J. H., Legg, S., Palmer, M. R., 2008
Internal waves, baroclinic energy fluxes, and mixing at the European shelf edge. Continental Shelf Research 28, 937-950, doi: 10.1016/j.csr.2008.01.014
Ellis, KM; Binding, CE; Bowers, DG, JH Simpson (2008).
A model of turbidity maximum maintenance in the Irish Sea Estuarine Coastal and Shelf Science Volume: 76 Pages: 765-774
Palmer, M. R., T. P. Rippeth, and J. H. Simpson (2008)
An investigation of internal mixing in a seasonally stratified shelf sea. J. Geophys. Res., 113, C12005, doi:10.1029/2007JC004531
Souza, AJ; Fisher, NR; Simpson, JH, MJ Howarth (2008)
Effects of tidal straining on the semidiurnal cycle of dissipation in the Rhine region of freshwater influence: Comparison of model and measurements. Journal of Geophysical Research-Oceans Volume: 113 Article Number: C01011
S. A. Thorpe, J. A. M. Green, J. H. Simpson, T. R. Osborn, and W. A. M. Nimmo-Smith, 2008
Boils and turbulence in a weakly stratified shallow tidal sea. Journal of Physical Oceanography, 38, 1711-1730.
Simpson, J.H., Berx, B., Gascoigne, J. and Saurel, C. (2007)
The interaction of tidal advection, diffusion and mussel filtration in a tidal channel. Journal of Marine Systems, 68, 556-568.
Berx, B., Simpson, J. and Mould, K. (2007)
Tides bring feeding bonanza to Menai Strait mussels. Shellfish News, Spring/Summer 2007, no. 23, 15-17.
J. Sharples, J. F. Tweddle, J. A. M. Green, M. R. Palmer, Y-N. Kim, A. E. Hickman, P. M. Holligan, C. M. Moore, T. P. Rippeth, J. H. Simpson, and V. Krivtsov, 2007
Spring-Neap modulation of internal tide mixing and vertical nutrient fluxes at a shelf edge in summer. Limnology and Oceanography 52, 1735-1757.
Kobayashi, S., Simpson, J.H., Fujiwara, T. and Horsburgh, K.J. (2006)
Tidal stirring and its impact on water column stability and property distributions in a semi-enclosed shelf sea (Seto Inland Sea, Japan). Continental Shelf Research, 26, 1296- 1306.
Wiles, P.J., Rippeth, T.P., Simpson, J.H. and Hendricks, P.J. (2006)
A novel technique for measuring the rate of turbulent dissipation in the marine environment. Geophysical Research Letters, 33, L21608, doi:10.1029/2006GL027050
Wiles, P.J., van Duran, L.A., Hase, C., Larsen, J. and Simpson, J.H. (2006)
Stratification and mixing in the Limfjorden in relation to mussel culture. Continental Shelf Research, 60, 129- 143.
Janzen, C.D., Simpson, J.H., Inall, M.E. and Cottier, F. (2005)
Across-sill circulation near a tidal mixing front in a broad fjord. Continental Shelf Research, 25, 1805-1824.
Rippeth, T.P., Palmer, M.R., Simpson, J.H., Fisher, N.R. and Sharples, J. (2005)
Thermocline mixing in summer stratified continental shelf seas. Geophysical Research Letters, 32, L05602, doi: 10.1029/20004GL022104.
Simpson, J.H., Williams, E., Brasseur, L.H. and Brubaker, J.M. (2005)
The impact of tidal staining on the cycle of turbulence in a partially stratified Estuary. Continental Shelf Research, 25, 51 -64.
Tweddle, J.F., Simpson, J.H. and Janzen, C. (2005)
Physical controls of food supply to benthic filter feeders in the Menai Strait, UK. Marine Ecology Progress Series, 289, 79-88.
Arneborg, L., Janzen, C., Liljebladh, B., Rippeth, T.P., Simpson, J.H. and Stigebrandt, A. (2004)
Spatial variability of diapycnal mixing and turbulent dissipation rates in a stagnant fjord basin. Journal of Physical Oceanography, 34, 1679-1691.
Simpson, J.H., Fisher, N.R. and Wiles, P. (2004)
Reynolds stress and TKE production in an estuary with a tidal bore. Estuarine, Coastal and Shelf Science, 60, 619-627.
Williams, E. and Simpson, J.H. (2004)
Uncertainties in estimates of Reynolds stress and TKE production rate using the ADCP variance method. Journal of Atmospheric and Oceanic Technology, 21, 347-357.
Rippeth, T.P., J.H. Simpson, E. Williams and M.E. Inall (2003)
Measurement of the Rates of Production and Dissipation of Turbulent Kinetic
Energy in an Energetic Tidal Flow: Red Wharf Bay Revisited.
Journal of Physical Oceanography 33(9), 1889-1901.
Moore, C.M. Suggett D., Holligan P.M., Sharples J. Abraham M.I., Luca M.I., Rippeth T.P., Fisher N.R., Simpson J.H. and Hydes D.J. (2003)
Physical controls on phytoplankton physiology and production at a shelf sea front: a fast repetition-rate fluorometer based field study.
Marine Ecology Progress Series
Rippeth T.P., E. Williams and J.H. Simpson (2002)
Reynolds stress and turbulent energy production in a tidal channel
Journal of Physical Oceanography 32, 1242-1251.
Allen G.L. and Simpson J.H. (2002)
The response of a strongly stratified fjord to energetic tidal forcing.
Estuarine, Coastal and Shelf Science 55(4), 629-644.
Burchard H., Bolding K., T.P. Rippeth, Stipps A., Simpson J.H. and Sundermann J.(2002)
Microstructure of turbulence in the northern North Sea: a comparative study of observations and model simulations.
Journal of Sea Research 47,223-238.
Fisher N.R., J.H. Simpson and M.J. Howarth (2002)
Turbulent dissipation in the Rhine ROFI forced by tidal flow and wind stress.
Journal of Sea Research 48, 249-258.
Hyder P., Simpson J.H., Christopoulos S, Krestinitis Y (2002)
The seasonal cycles of stratification and circulation in the Thermaikos Gulf Region Of Freshwater Influence (ROFI), north-west Aegean.
Continental Shelf Research 22(17), 2573-2597.
Hyder P., Simpson J.H., Christopoulos S. (2002)
Sea-breeze forced diurnal surface currents in the Thermaikos Gulf, north-west Aegean. Continental Shelf Research 22(4), 585-601.
Kasai A., Fujiwara T. Simpson J.H. and Kakehi S. (2002)
Circulation and cold dome in a gulf-type ROFI
Continental Shelf Research 22(11-13), 1579-1590.
Rippeth T.P, J.H. Simpson, R.J. Player and M. Garcia.(2002)
Current Oscillations in the diurnalinertial band on the Catalonian Shelf in Spring.
Continental Shelf Research 22, 247-265.
Sanchez-Arcilla A. and Simpson, J.H. (2002)
The narrow shelf concept: couplings and fluxes
Continental Shelf Research 22(2), 153-172.
Simpson J.H., H. Burchard, N.R.Fisher and T.P.Rippeth (2002)
The semi-diurnal cycle of dissipation in a ROFI: model-measurement comparisons
Continental Shelf Research 22, 1615-1628
Simpson, J.H., P. Hyder, T.P. Rippeth and I.M. Lucas (2002)
Forced oscillations near the critical latitude for diurnal-inertial resonance
Journal of Physical Oceanography, 32(1),177-187.
Midgley, R.P., Simpson, J.H., Hyder, P. and Rippeth, T.P. (2001)
Seasonal cycle of vertical structure and deep water renewal in the Clyde. Sea. Estuarine, Coastal and Shelf Science, 53, 813–823.
Rippeth, T.P., Fisher, N.R. and Simpson, J.H. (2001)
The cycle of turbulent dissipation in the presence of tidal straining. Journal of Physical Oceanography, 31, 2458–2471.
Sharples, J., Moore, C.M., Rippeth, T.P., Holligan, P.M., Hydes, D.J., Fisher, N.R. and Simpson, J.H. (2001)
Phytoplankton distribution and survival in the thermocline. Limnology and Oceanography, 46(3), 486–496.
Simpson, J.H., Vennel, R. and Souza, A.J. (2001)
The salt fluxes in a tidally–energetic estuary. Estuarine, Coastal and Shelf Science, 52, 131–142.
Souza, A.J., Simpson, J.H., Harikrishnan, M. and Malarkey, J. (2001)
Flow structure and seasonality in the Hebridean slope current. Oceanologica Acta, 24, 63–76.
Kasai, A., Hill, A.E., Fujiwara, T. and Simpson, J.H. (2000)
Effect of the Earth's rotation on the circulation in regions of freshwater influence. Journal of Geophysical Research, 105, 16961–16969.
Simpson, J.H., Rippeth, T.P. and Campbell, A.R. (2000)
The phase lag of turbulent dissipation in tidal flow. Interactions between Estuaries, Coastal Seas and Shelf Seas (ed. T. Yanagi). Terra Scientific Publishing, Tokyo, pp.57–67.
Hoguane, A.M., Hill, A.E., Simpson, J.H. and Bowers, D.G. (1999)
Diurnal and tidal variation of temperature and salinity in the Ponta Rasa Mangrove Swamp, Mozambique. Estuarine, Coastal and Shelf Science, 49, 251–264.
Kasai, A., Rippeth, T.P. and Simpson, J.H. (1999)
Density and flow structure in the Clyde Sea front. Continental Shelf Research, 19, 1833–1848.
Rippeth, T.P. and Simpson, J.H. (1998)
Diurnal signals in vertical motions on the Hebridean Shelf. Limnology and Oceanography, 43, 1690–1696.
Simpson, J.H. (1998)
Tidal processes in shelf seas. The Sea, Vol. 10. Brink. K.H. and Robinson, A.R. [eds.]. John Wiley and Sons Inc.
Simpson, J.H. and Rippeth, T.P. (1998)
Non–conservative nutrient fluxes from budgets in the Irish Sea. Estuarine, Coastal and Shelf Sea Science, 47, 707–714.
Rippeth, TP and J.H.Simpson (1996).
The frequency and duration of episodes of complete vertical mixing in the Clyde Sea. Continental Shelf Research, 16(7), 933- 947
Simpson, JH, W.R. Crawford, T.P. Rippeth, A.R. Campbell and J.V.S. Choak (1996).
Vertical Structure of turbulent dissipation in shelf seas. Journal of Physical Oceanography, 26(8), (1996) 1580-1590.
Hill, A.E., James, I.D., Linden, P.F., Matthews, J.P., Prandle, D., Simpson, J.H., Gmitrowicz, E.M., Smeed, D.A., Lwiza, K.M.M., Durazo, R., Fox, A.D. and Bowers, D.G. (1993)
Dynamics of tidal mixing fronts in the North Sea. Phil.Trans.R.Soc.Lond., A,343,431-446
Weeks, A.R., Simpson, J.H. and Bowers, D.(1993)
The relationship between concentrations of suspended particulate material and tidal processes in the Irish Sea. Continental Shelf Research, 13,1325-1334
Bowers, D.G.,T.P.Rippeth and J.H.Simpson (1991)
Tidal friction in a sea with two equal semi-diurnal tidal constituents. Continental Shelf Research, 11,203-209
Lwiza,K.M.M.,Bowers, D.G and J.H.Simpson (1991)
Residual and tidal flow at a tidal mixing front in the North Sea. Continental Shelf Research, 11, 1379-1395.
Bowers,D.G. and J.H.Simpson (1990)
Geographical variations in the seasonal heat cycle in N.W.European shelf seas. Continental Shelf Research, 10,185-199
Simpson J. H., Mitchelson- Jacob E. G., Hill A. E. (1990)
Flow structure in a channel from an Acoustic Doppler Current Profiler. Continental Shelf Research 10(6), 589-603.
Bowers, D.G. and J.H.Simpson (1987)
The mean position of tidal fronts in European-shelf seas. Continental Shelf research,7,35-44
Mitchelson E. G., Jacob N. J., Simpson J. H. (1986)
Ocean Colour Algorithms from the Case 2 waters of the Irish Sea in comparison to algorithms from Case 1 waters. Continental Shelf Research 5(3), 403-415.
Richardson K., Lavin-Peregrina M.F., Mitchelson E.G., Simpson J.H. (1985)
Seasonal distribution of Chlorophyll a in relation to Physical Structure in the western Irish Sea. Oceanologica Acta 8(1), 77-86.
Simpson, J.H. and Bowers, D.G (1984)
The role of tidal stirring in controlling the seasonal heat cycle in shelf seas. Annales Geophysicae, 2, 411-416
Simpson, J.H. and Bowers, D.G (1981)
Models of stratification and frontal movement in shelf seas. Deep Sea Research, 28A, 727-738
Simpson, J.H. and Bowers, D.G (1979)
Shelf sea fronts' adjustments revealed by satellite IR imagery. Nature, 280, 648-651
Simpson, J.H. and J. Sharples (2012)
The Physical and Biological Oceanography of the Shelf Seas, Cambridge University Press, pp424.
Baumert, H., Simpson, J.H. and Suendermann [Eds.] (2005)
Marine Turbulence: Theories, Observations and Models. Cambridge University Press, pp. 630.
Simpson, J.H., Rippeth, T.P., Williams, E. and Betteridge, K. (2005)
Acoustic Dopper Techniques, Chapter 15 of Marine Turbulence: Theories, Observations and Models, Cambridge University Press. 127-138.
Wiles P.J, Simpson J.H. and Rippeth T.P.(2005)
A novel technique for measuring mixing using Acoustic Doppler Current
Profilers (ADCPs). Proceedings of the IEE/OES/CMTC 8th Conference on Current Measurement Technology, 9-13.
Wiles, P.J., Simpson, J.H. and Rippeth, T.P. (2005)
A novel technique for measuring mixing using Acoustic Doppler Current Profilers (ADCPs). Proceedings of the IEEE/OES Eighth Working Conference on Current Measurement Technology, 1-5.
Simpson,J.H. and Bowers, D.G (1990)
Databank oceanography: testing models of the seasonal heat cycle in shelf seas. in: Physics of shallow seas; Wang Huatong, Wang Jingyong and Dai Hua, editors. China Ocean Press, Beijing.
T. P. Rippeth, J. C. Gascoigne, J. A. M. Green, M. E. Inall, M. R. Palmer, J. H. Simpson, and P. J. Wiles 2008
Comment on 'Observations of biologically generated turbulence in a coastal inlet' by Kunze et al. Science Online
TP Rippeth, JC Gascoigne, M Green, ME Inall, MR Palmer, JH Simpson and PJ Wiles (2007)
Turbulent Dissipation of Coastal Seas, E-Letter posted on Science Online 7 June 2007.
Bowers, D.G., P.J.E.Crook and J.H.Simpson (1982)
An evaluation of sea surface temperature estimates from the AVHRR. in Remote Sensing and the atmosphere. Proceedings of the annual technical conference of the Remote Sensing Society.
Simpson, J.H. and Bowers, D.G (1982)
On the use of infra-red imagery to study the surface temperature of the shelf seas. in Proceedings in Marine Remote Sensing, F.John Vernberg and F.P.Diemer, editors, University of South Carolina Press
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