10.25338/B84C75
Roberts, Derek
0000-0003-1604-1803
University of California, Davis
Schladow, S. Geoffrey
University of California, Davis
Forrest, Alexander
University of California, Davis
Supporting data for the manuscript: Observations and modeling of the
surface seiches of Lake Tahoe, USA
Dryad
dataset
2019
Lake Tahoe
Physical limnology
Seiches
2019-03-01T19:24:32Z
2019-03-01T19:24:32Z
en
278450213 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
This data set was created to make the data associated with the
manuscript Observations and modeling of the surface seiches of Lake Tahoe,
USA, accepted for publication in Aquatic Sciences, publically
available per journal convention. The publication abstract is shown below:
A rich array of spatially complex surface seiche modes exists in lakes.
While the amplitude of these oscillations is often small, knowledge of
their spatio-temporal characteristics is valuable for understanding when
they might be of localized hydrodynamic importance. The expression and
impact of these basin-scale barotropic oscillations in Lake Tahoe are
evaluated using a finite-element numerical model and a distributed network
of ten high-frequency nearshore monitoring stations. Model-predicted nodal
distributions and periodicities are confirmed using the presence/absence
of spectral power in measured pressure signals, and using
coherence/phasing analysis of pressure signals from stations on common and
opposing antinodes. Surface seiches in Lake Tahoe have complex nodal
distributions despite the relative simplicity of the basin morphometry.
Seiche amplitudes are magnified on shallow shelves, where they
occasionally exceed 5 cm; elsewhere, amplitudes rarely exceed 1 cm. There
is generally little coherence between surface seiching and littoral water
quality. However,pressure-temperature coherence at shelf sites suggests
potential seiche-driven pumping. Main-basin seiche signals are present in
attached marinas, wetlands, and bays, implying reversing flows between the
lake and these water bodies. On the shallow sill connecting Emerald Bay to
Lake Tahoe, the fundamental main-basin seiche combines with a zeroth-mode
harbor seiche to dominate the cross-sill flow signal, and to drive
associated temperature fluctuations. Results highlight the importance of a
thorough descriptive understanding of the resonant barotropic oscillations
in any lake basin in a variety of research and management contexts, even
when the magnitude of these oscillations tends to be small.
Details on individual data files, including collection and processing, are
included in the "ReadMeReference...txt" files included in the
data set.