Lake hydrodynamics

Mortimer, C. H.

doi:10.1080/05384680.1974.11923886

Cited by 74 publications

(86 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Increased frequency of episodic events (strong winds and storms) linked to climate change generates strong shear flow and turbulence through internal wave dynamics in stratified lakes (Imberberg, 1994). Though the study of physical processes in lakes began nearly a century ago (Wedderburn, 1913), the role of wind forcing on lake processes is rarely studied (Mortimer, 1974;Imberger, 1980;Imboden et al, 1983, among others). The importance of physical forcing to biological processes in lakes has gained increasing recognition in the last three decades (Reynolds, 1994;Oftrosvky et al, 1996;Evans et al, 2008;Marcé et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Importance of climate change-physical forcing on the increase of cyanobacterial blooms in a small, stratified lake

Planas

Paquet

2016

J Limnol

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Importance of climate change-physical forcing on the increase of cyanobacterial blooms in a small, stratified lake

Planas

Paquet

2016

J Limnol

View full text Add to dashboard Cite

show abstract

“…For example, Falconer et al (1999) reported that the local cell density can increase by a factor of 1000 within few hours in response to the effect of wind. However, more complex physical processes, such as internal waves or seiches, can also generate large and persistent displacements of the water layers in stratified lakes (Mortimer, 1974;Lemmin and Mortimer, 1986).…”

Section: Introductionmentioning

confidence: 99%

Impact of internal waves on the spatial distribution of Planktothrix rubescens (cyanobacteria) in an alpine lake

et al. 2010

View full text Add to dashboard Cite

The vertical and horizontal distribution of the cyanobacterium, Planktothrix rubescens, was studied in a deep alpine lake (Lac du Bourget) in a 2-year monitoring program with 11 sampling points, and a 24-h survey at one sampling station. This species is known to proliferate in the metalimnic layer of numerous deep mesotrophic lakes in temperate areas, and also to produce hepatotoxins. When looking at the distribution of P. rubescens at the scale of the entire lake, we found large variations (up to 10 m) in the depth of the biomass peak in the water column. These variations were closely correlated to isotherm displacements. We also found significant variations in the distribution of the cyanobacterial biomass in the northern and southern parts of the lake. We used a physical modeling approach to demonstrate that two internal wave modes can explain these variations. Internal waves are generated by wind events, but can still be detected several days after the end of these events. Finally, our 24-h survey at one sampling point demonstrated that the V1H1 sinusoidal motion could evolve into nonlinear fronts. All these findings show that internal waves have a major impact on the distribution of P. rubescens proliferating in the metalimnic layer of a deep lake, and that this process could influence the growth of this species by a direct impact on light availability.

show abstract

“…Mortimer, 1974Mortimer, , 1980Simons, 1980;Hutter, 1982;Heaps, 1984;Sünder-mann, 1984). However, for most of these works, if the threedimensional field equations including the nonlinear advection terms are numerically solved, the inertial waves seem to be hardly observable in the numerical results, or they remain only for a fairly short time and then are rapidly damped out.…”

Section: Introductionmentioning

confidence: 99%

Barotropic response in a lake to wind-forcing

2001

View full text Add to dashboard Cite

Abstract.We report results gained with a three-dimensional, semi-implicit, semi-spectral model of the shallow water equations on the rotating Earth that allowed one to compute the wind-induced motion in lakes. The barotropic response to unidirectional, uniform winds, Heaviside in time, is determined in a rectangular basin with constant depth, and in Lake Constance, for different values and vertical distributions of the vertical eddy viscosities. It is computationally demonstrated that both the transitory oscillating, as well as the steady state current distribution, depends strongly upon the absolute value and vertical shape of the vertical eddy viscosity. In particular, the excitation and attenuation in time of the inertial waves, the structure of the Ekman spiral, the thickness of the Ekman layer, and the exact distribution and magnitude of the upwelling and downwelling zones are all significantly affected by the eddy viscosities. Observations indicate that the eddy viscosities must be sufficiently small so that the oscillatory behaviour can be adequately modelled.Comparison of the measured current-time series at depth in one position of Lake Constance with those computed on the basis of the measured wind demonstrates fair agreement, including the rotation-induced inertial oscillation.

show abstract

Lake hydrodynamics

Cited by 74 publications

References 52 publications

Importance of climate change-physical forcing on the increase of cyanobacterial blooms in a small, stratified lake

Importance of climate change-physical forcing on the increase of cyanobacterial blooms in a small, stratified lake

Impact of internal waves on the spatial distribution of Planktothrix rubescens (cyanobacteria) in an alpine lake

Barotropic response in a lake to wind-forcing

Contact Info

Product

Resources

About