Hydrological-morphological processes in the estuary of the Bol’shoi Vilyui River (Eastern Kamchatka Coast)

Горин, С. Л.

doi:10.1134/s0097807812060048

Cited by 2 publications

(2 citation statements)

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“…Due to sources of both freshwater and seawater, the lake body consists of mainly two water masses: the surface freshwater and the saline one below. This causes the existence of sharp pycnocline, its top locating at ∼1.5 m depth in summer (Gorin 2013). While the freshwater is supplied to the lake continuously, it is suggested that the marine water enters the lake trough mainly during the winter storms (Gorin 2013).…”

Section: The Site and Measurementsmentioning

confidence: 99%

“…This causes the existence of sharp pycnocline, its top locating at ∼1.5 m depth in summer (Gorin 2013). While the freshwater is supplied to the lake continuously, it is suggested that the marine water enters the lake trough mainly during the winter storms (Gorin 2013). The salinity of seawater varies from 25‰ in summer to 32‰ in winter.…”

Section: The Site and Measurementsmentioning

confidence: 99%

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Mid-depth temperature maximum in an estuarine lake

Stepanenko

Репина

Artamonov

et al. 2018

Environ. Res. Lett.

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The mid-depth temperature maximum (TeM) was measured in an estuarine Bol'shoi Vilyui Lake (Kamchatka peninsula, Russia) in summer 2015. We applied 1D k-model LAKE to the case, and found it successfully simulating the phenomenon. We argue that the main prerequisite for mid-depth TeM development is a salinity increase below the freshwater mixed layer, sharp enough in order to increase the temperature with depth not to cause convective mixing and double diffusion there. Given that this condition is satisfied, the TeM magnitude is controlled by physical factors which we identified as: radiation absorption below the mixed layer, mixed-layer temperature dynamics, vertical heat conduction and water-sediments heat exchange. In addition to these, we formulate the mechanism of temperature maximum 'pumping', resulting from the phase shift between diurnal cycles of mixed-layer depth and temperature maximum magnitude. Based on the LAKE model results we quantify the contribution of the above listed mechanisms and find their individual significance highly sensitive to water turbidity. Relying on physical mechanisms identified we define environmental conditions favouring the summertime TeM development in salinity-stratified lakes as: small-mixed layer depth (roughly, ∼< 2 m), transparent water, daytime maximum of wind and cloudless weather. We exemplify the effect of mixed-layer depth on TeM by a set of selected lakes.

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Section: The Site and Measurementsmentioning

confidence: 99%

Section: The Site and Measurementsmentioning

confidence: 99%