Seiches in the Plitvice Lakes

Slaviček, Lasta

doi:10.15233/gfz.2016.33.6

Cited by 5 publications

(9 citation statements)

References 13 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apart from the diurnal cycle and its higher harmonics, other significant periods emerged for some variables, such as the air pressure period of approximately 20 d, which is very likely associated with atmospheric planetary (Rossby) waves (e.g., Pasarić et al, 2000;Šepić et al, 2012). Additionally, a similar period (23 d) also appeared in the lake temperature at a depth of 23 m. However, the possible relationship with atmospheric Rossby waves is beyond the scope of the present work.…”

Section: Spectramentioning

confidence: 75%

“…While causes of the periodicities at ≈ 6.9 h and 49 min are not clear, periods of ≈ 9 min are driven by barotropic surface seiches. Namely, according to the observation study of Kozjak Lake, the principal mode of surface seiches is 9 min (Pasarić and Slaviček, 2016). These barotropic oscillations of the lake surface produce oscillating (upwinddownwind) lake currents that have the same period as oscillations of the lake surface.…”

Section: Spectramentioning

confidence: 99%

“…Few studies have reported on the observed physical properties of the lakes, such as lake surface temperatures, water conductivity, and transparency (Gligora Udovič et al, 2017;Sironić et al, 2017). Some authors have discussed lake stratification based only on occasional observations of temperature profiles (Gavazzi, 1919;Petrik, 1958Petrik, , 1961, whereas others have investigated surface seiches (Gavazzi, 1919;Pasarić and Slaviček, 2016) and have reported two possible internal seiche events seen as vertical movements of the isothermal surfaces (Gavazzi, 1919).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evolution and dynamics of the vertical temperature profile in an oligotrophic lake

Klaić

Babić

Orlić

2020

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. In this study, the fine-scale responses of a stratified oligotrophic karstic lake (Kozjak Lake, Plitvice Lakes, Croatia; the lake fetch is 2.3 km, and the maximum depth is 46 m) to atmospheric forcing on the lake surface are investigated. Lake temperatures measured at a resolution of 2 min at 15 depths ranging from 0.2 to 43 m, which were observed during the 6 July–5 November 2018 period, were analyzed. The results show thermocline deepening from 10 m at the beginning of the observation period to 16 m at the end of the observation period, where the latter depth corresponds to approximately one-third of the lake depth. The pycnocline followed the same pattern, except that the deepening occurred throughout the entire period approximately 1 m above the thermocline. On average, thermocline deepening was 3–4 cm d−1, while the maximum deepening (12.5 cm d−1) coincided with the occurrence of internal seiches. Furthermore, the results indicate three different types of forcings on the lake surface; two of these forcings have diurnal periodicity – (1) continuous heat fluxes and (2) occasional periodic stronger winds – whereas forcing (3) corresponds to occasional nonperiodic stronger winds with steady along-basin directions. Continuous heat fluxes (1) produced forced diurnal oscillations in the lake temperature within the first 5 m of the lake throughout the entire observation period. Noncontinuous periodic stronger winds (2) resulted in occasional forced diurnal oscillations in the lake temperatures at depths from approximately 7 to 20 m. Occasional strong and steady along-basin winds (3) triggered both baroclinic internal seiches with a principal period of 8.0 h and barotropic surface seiches with a principal period of 9 min. Lake currents produced by the surface seiches under realistic-topography conditions generated baroclinic oscillations of the thermocline region (at depths from 9 to 17 m) with periods corresponding to the period of surface seiches (≈ 9 min), which, to the best of our knowledge, has not been reported in previous lake studies.

show abstract

Section: Spectramentioning

confidence: 75%

Section: Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evolution and dynamics of the vertical temperature profile in an oligotrophic lake

Klaić

Babić

Orlić

2020

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…While causes of the periodicities at ≈ 6.9 h and 49 min are not clear, periods of ≈ 9 min are driven by barotropic surface seiches. Namely, according to the observational study of Kozjak Lake, the principal mode of surface seiches is 9 min (Pasarić and Slaviček, 2016). These barotropic oscillations produce oscillating (upwind-downwind) lake currents, which due to realistic lake basin (that is, due to the inclined lake bottom) oscillate with the same period upslope and downslope.…”

Section: Spectramentioning

confidence: 99%

“…Few studies have reported on the observed physical properties of lakes, such as lakes temperatures, water conductivity and transparency (Gligora Udovič et al, 2017;Sironić et al, 2017). Some authors report on lake stratifications based only on occasional observations of temperature profiles (Gavazzi, 1919;Petrik, 1958Petrik, , 1961, while others investigated surface seiches (Gavazzi, 1919;Pasarić and Slaviček, 2016) and mentioned two possible events of internal seiches seen as vertical movements of the isothermal surfaces (Gavazzi, 1919).…”

Section: Introductionmentioning

confidence: 99%

Evolution and dynamics of the vertical temperature profile in an oligotrophic lake

Klaić¹,

Babić²,

Orlić³

2020

Preprint

View full text Add to dashboard Cite

Abstract. Abstract. In this study, the fine-scale responses of a stratified oligotrophic karstic lake (Kozjak, Plitvice Lakes, Croatia; lake fetch is 2.3 km and maximum depth is 46 m) to atmospheric forcings on the lake surface are investigated. Lake temperatures measured at a resolution of 2 min at 15 depths ranging from 0.2 to 43 m, which were observed during the 6 July–5 November 2018 period were analyzed. The results show thermocline deepening from 10 m at the beginning, to 16 m at the end of the observational period, where the latter corresponds to approximately one third of the lake depth. The pycnocline followed the same pattern, except that the deepening occurred throughout the entire period approximately 1 m above the thermocline. On average, thermocline deepening was 3–4 cm per day, while the maximum deepening (12.5 cm per day) coincided with the occurrence of internal seiches. Furthermore, the results indicate three different types of forcings on the lake surface, and two of these forcings have diurnal periodicity: (1) continuous heat fluxes and (2) occasional periodic stronger winds, while the (3) forcing corresponds to occasional nonperiodic stronger winds with along the basin-steady directions. Continuous heat fluxes (1) produced forced diurnal oscillations in the lake temperature within the first 5 meters of the lake throughout the entire observational period. Noncontinuous periodic stronger winds (2) resulted in occasional forced diurnal oscillations in the lake temperatures at depths from approximately 7 to 20 m. Occasional steady along-the-basin stronger winds (3) triggered both, baroclinic internal seiches with a principal period of 8.0 h, and, barotropic surface seiches with a principal period of 9 min. Lake currents produced by the surface seiches under realistic-topography conditions generated baroclinic oscillations of the thermocline region (at depths of 9–17 m) with periods corresponding to the period of surface seiches (≈ 9 min), which to our knowledge, has not been reported in previous lake studies. Finally, a simple multiple linear regression model of the near-surface temperature (0.2 m), which depends on the air temperature and wind speed, can only be used as a rough estimate of the daily mean lake temperature under weak wind and undisturbed air temperature pattern conditions.

show abstract

Natural Frequencies of seiches in Lake Chapala

Avalos-Cueva

Monzón

Filonov

et al. 2019

Sci Rep

View full text Add to dashboard Cite

This research presents an analysis of the frequencies and vibration modes of the structure of the superficial seiches of Lake Chapala using mathematical modelling and measurements. The HAMSOM model was run with wind fields from coastal meteorological stations and for different lake storage levels. The lake water level measurements were carried out in two campaigns in 2003. An analysis of the surface seiches in the lake was performed using the fast Fourier transform method. A spectral analysis of lake water level measurements reveals seiches with periods close to 5.9, 3, 2, and 1.5 h. A comparison with the periods calculated by the HAMSOM model indicates that these periods correspond to superficial seiches of the fundamental longitudinal mode of the lake and the subsequent three modes. The lake has undergone important changes in its storage level over time. Therefore, we modelled it with storage levels from the isobaths 90 to 95 m and found that surface seiche periods decreased to 5.2 h.

show abstract

Seiches in the Plitvice Lakes

Cited by 5 publications

References 13 publications

Evolution and dynamics of the vertical temperature profile in an oligotrophic lake

Evolution and dynamics of the vertical temperature profile in an oligotrophic lake

Evolution and dynamics of the vertical temperature profile in an oligotrophic lake

Natural Frequencies of seiches in Lake Chapala

Contact Info

Product

Resources

About