Akvazond moored automatic measuring system for vertical profiling of the marine medium

Ostrovskii, Alexander; Зацепин, А. Г.; Derevnin, V. A.; Nizov, S. S.; Poyarkov, S. G.; Tsybulskiy, A. L.; Shvoev, D. A.

doi:10.1134/s000143700802015x

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Water velocity and direction profiles were recorded every one minute during a 30 minutes period, and the average profile along the wind axis was then computed. Accuracy of ADCP measurements was 1% measured value ± 0.5 cm s -1 (OSTROVSKII et al, 2008). ADCP data were acquired throughout the whole water column during hypolimnetic withdrawal episodes, while measurements were confined to the epilimnion when this hydraulic management was not operative.…”

Section: Meteorological Forcing and Hydrodynamics Determinationsmentioning

confidence: 99%

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Moreno‐Ostos

Cruz-Pizarro

Basanta³

et al. 2009

International Review of Hydrobiology

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Moreno-Ostos, E., Cruz-Pizarro, L., Basanta, A., George, D. G. (2009). Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon-Shaped Reservoir. International Review of Hydrobiology, 94(3), 245-257.Phytoplankton communities in lakes and reservoirs are seldom homogeneously distributed but usually aggregate in patches and gradients. In this study we have combined the use of in vivo spectrofluorometry and acoustic Doppler current profiling to investigate the effect of water movements on the spatial distribution of cyanobacteria and diatoms in a thermally stratified reservoir in SW Spain. The distinctive canyon-shaped morphometry of the reservoir (El Gergal) favoured the development of a 'conveyor belt' pattern of circulation aligned with the long axis of the reservoir. Under non-regulated conditions, the spatial distribution of phytoplankton was almost entirely dependent on the interactions between advective transport and the buoyancy properties of the different functional groups of phytoplankton. The positively-buoyant cyanobacteria accumulated near the surface and were then transported downwind by the surface drift currents. In contrast, the negatively-buoyant diatoms sank in the water column and were transported upwind by the sub-surface return currents. When deep water was abstracted from the reservoir, these distribution patterns were modified. The results are discussed in relation to the problem of acquiring representative water samples from the reservoir and the application of a simple empirical model to optimize the location of the station used for routine cyanobacteria sampling on the reservoir.Peer reviewe

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Section: Meteorological Forcing and Hydrodynamics Determinationsmentioning

confidence: 99%

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Moreno‐Ostos

Cruz-Pizarro

Basanta³

et al. 2009

International Review of Hydrobiology

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“…Above the seasonal thermocline, at a depth of less than 10 m from the sea surface, the Ri values become less critical. This phenomenon was also observed in the coastal shelf waters of the Black Sea [15] and in the upper layer of the southern part of the Kerch Strait [33]. The maximum vertical shear of currents in the seasonal thermocline layer is quite often observed.…”

Section: Vertical Shears Of Currentsmentioning

confidence: 84%

“…The autonomous buoy stations (ABS) make it possible to obtain continuous time series of measurements at fixed horizons at the point location of the station [13 -14]. Akvazond [15] and Akvalog [16 -18] autonomous probing profilers allow to get regular synchronous profiles of a wide range of aquatic environment parameters (including three components of current velocity) with fine-resolution for several months at the station point location.…”

Section: Vertical Structure Of Current Velocity Fieldmentioning

confidence: 99%

Structure of the Black Sea Currents Based on the Results of the LADCP Observations in 2004–2014

Morozov¹,

Lemeshko²,

Shutov³

et al. 2017

PhO

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The article presents the core results of lowered acoustic Doppler current profiler (LADCP) applied in the Black Sea within [2004][2005][2006][2007][2008][2009][2010][2011][2012][2013][2014]. Average features of the vertical structure of currents in the upper 600 m layer are outlined. The linear relation between vertical distribution of kinetic energy isopycnically averaged over the station ensemble and density is established. This relation is traced till the isopycn occurrence depth with density of 17 kg/m 3 (~500 m). The mean current velocity has near constant value about ~ 4 cm/s in lower depth layers (>500 m), which is in a good agreement with autonomic buoys data. The averaged profile of current velocity vertical shears shows two wellseparated maxima in the seasonal and main pycnocline layers. LADCP derived velocity shears are more than ten times exceed the geostrophic current shears. Turbulent vertical mixing coefficient, calculated by the G89 model (Gregg 1989) demonstrates the denominated minimum in the permanent pycnocline (410 -6 m 2 /s) and increases with depth to achieve value 210 -5 m 2 /s at 450 m depth. The profile of current velocity averaged by the ensemble casts in the near bottom boundary layer demonstrates near logarithmic relation.

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APMOS: An autonomous profiling measurement system for the ocean surface boundary layer

Gerrlets

Badewlen

Braun

et al. 2017

OCEANS 2017 - Aberdeen

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Akvazond moored automatic measuring system for vertical profiling of the marine medium

Cited by 6 publications

References 2 publications

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Spatial Heterogeneity of Cyanobacteria and Diatoms in a Thermally Stratified Canyon‐Shaped Reservoir

Structure of the Black Sea Currents Based on the Results of the LADCP Observations in 2004–2014

APMOS: An autonomous profiling measurement system for the ocean surface boundary layer

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