EESS talk on "Internal waves and wave-driven transport in lakes"
Event details
| Date | 28.11.2017 |
| Hour | 12:15 › 13:15 |
| Speaker |
Dr Leo R. Maas, Associate professor, Ocean Wave Dynamics, Utrecht University and NIOZ (Royal Netherlands Institute for Sea Research), Texel, NL Short biography: Leo Maas is a physical oceanographer, interested in fundamental physical processes that arise in lakes and oceans, and in their mathematical descriptions. He graduated in oceanography at Utrecht University. For 30 years He worked as researcher at NIOZ, for 30 years, published about 100 refereed papers, and as of October 2016 switched back as professor to Utrecht University. |
| Location | |
| Category | Conferences - Seminars |
Abstract:
Lakes can be stably-stratified due to temperature variations. On a rotating earth, lakes are also subject to Earth’ rotation. Stratification and rotation both inhibit the free exchange of gases, plankton and minerals. At the same time, however, stratification and rotation do support a subsurface type of wave, that attains its maximum displacement within the fluid domain, below the surface. These, so-called internal waves transport energy and momentum throughout the lake, away from their generation sites. Internal waves can thus be partially responsible for mixing (especially for mixing at depth) and for transporting material elsewhere. But is this sufficient to break the constraints imposed by stratification and rotation?
Conceptual ideas of waves in enclosed fluid domains will be used to describe the basic features of internal wave dynamics and related transport, such as the occurrence of amphidromes, wave chaos and wave attractors. These features will be Illustrated by laboratory experiments in stratified and rotating fluids, their connection to lake (and sea) observations will be discussed, and we will seek to answer the above question.
Lakes can be stably-stratified due to temperature variations. On a rotating earth, lakes are also subject to Earth’ rotation. Stratification and rotation both inhibit the free exchange of gases, plankton and minerals. At the same time, however, stratification and rotation do support a subsurface type of wave, that attains its maximum displacement within the fluid domain, below the surface. These, so-called internal waves transport energy and momentum throughout the lake, away from their generation sites. Internal waves can thus be partially responsible for mixing (especially for mixing at depth) and for transporting material elsewhere. But is this sufficient to break the constraints imposed by stratification and rotation?
Conceptual ideas of waves in enclosed fluid domains will be used to describe the basic features of internal wave dynamics and related transport, such as the occurrence of amphidromes, wave chaos and wave attractors. These features will be Illustrated by laboratory experiments in stratified and rotating fluids, their connection to lake (and sea) observations will be discussed, and we will seek to answer the above question.
Practical information
- General public
- Free
- This event is internal
Organizer
- EESS - IIE
Contact
- Dr Andrea Cimatoribus & Prof. D. Andrew Barry, ECOL