Abstract
Considered is the water exchange in the coastal zone of natural reservoirs induced as a result of the differential heating of water above the sloping bottom. The laboratory experiment data and the constructed simple analytic model demonstrate that the main reason for the motions is the hydrostatic pressure difference in the area above the slope. It is demonstrated for different types of vertical stratification that the pressure difference maximum is reached at the depth of about 0.4D (D is the depth of the heated layer in the deep part). The respective current is directed to the shore and is a driving element of the whole circulation of water including its forced ascend along the slope, the free surface level increase, and the formation of the compensatory offshore current in the upper layers. The analysis of in situ observational data in the coastal zone of the Baltic Sea at the intensive heating in July 2006 corroborates the obtained regularities indicating that the coastal heating favors the formation of upwelling along the slope.
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References
G. Z. Gershuni, E. M. Zhukhovitskii, and A. A. Nepomnyashchii, Stability of Convective Currents (Nauka, Moscow, 1989) [in Russian].
A. I. Ginzburg, A. G. Kostyanoi, D. M. Solov’ev, and N. A. Sheremet, “Frontal Upwelling Zone near the Eastern Coast of the Caspian Sea (Satellite Observations),” Issledovanie Zemli iz Kosmosa (Earth Studies from Space), No. 4 (2006) [in Russian].
I. P. Chubarenko, “Horizontal Convective Water Exchange above a Sloping Bottom: The Mechanism of Its Formation and an Analysis of Its Development,” Okeanol., No. 2, 50 (2010) [Russ. Oceanol., No. 2, 50 (2010)].
I. P. Chubarenko and N. Yu. Demchenko, “Laboratory Modeling of the Structure of a Thermal Bar and Related Circulation in a Basin with a Sloping Bottom,” Okeanol., No. 3, 48 (2008) [Russ. Oceanol., No. 3, 48 (2008)].
V. V. Shuleikin, Marine Physics (Nauka, Moscow, 1968) [in Russian].
I. Chubarenko, S. Shchuka, N. Chubarenko, and N. Ryzhikov, “Day-Night Water Dynamics in Coastal Zone,” in Abstracts of Baltic Sea Science Congress, March 19–22, 2007, Rostock, Germany, Part II.
D. E. Farrow, “Periodically Forced Natural Convection over Slowly Varying Topography,” J. Fluid Mech., 508 (2004).
D. E. Farrow and J. C. Patterson, “The Daytime Circulation and Temperature Pattern in a Reservoir Sidearm,” Int. J. Heat Mass Transfer, 37 (1994).
M. Kahru, B. Hakansson, and O. Rud, “Distributions of the Sea-Surface Temperature Fronts in the Baltic Sea as Derived from Satellite Imagery,” Cont. Shelf Res., No. 6, 15 (1995).
S. Monismith, J. Imberger, and M. Morison, “Convective Motions in the Sidearm of a Small Reservoir,” Limnol. Oceanogr., No. 8, 35 (1990).
C. Lei and J. C. Patterson, “Unsteady Natural Convection in a Triangular Enclosure Induced by the Absorption of Radiation,” J. Fluid Mech., 460 (2002).
D. W. Pierce and P. B. Rhines, “Convective Building of a Pycnocline: Laboratory Experiments,” J. Phys. Oceanogr., 26 (1996).
U. Suursaar and R. Aps, “Spatio-temporal Variations in Hydro-physical and -chemical Parameters during a Major Upwelling Event off the Southern Coast of the Gulf of Finland in Summer 2006,” Oceanol., No. 2, 49 (2007).
C. B. Woodson, D. I. Eerkes-Medrano, A. Flores-Morales, et al., “Local Diurnal Upwelling Driven by Sea Breezes in Northern Monterey Bay,” Cont. Shelf Res., 27 (2007).
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Original Russian Text © I.P. Chubarenko, V.V. Afon, V.Ya. Chugaevich, V.A. Krechik, 2013, published in Meteorologiya i Gidrologiya, 2013, No. 1, pp. 79–91.
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Chubarenko, I.P., Afon, V.V., Chugaevich, V.Y. et al. Water dynamics above the sloping bottom due to an intense summer heating. Russ. Meteorol. Hydrol. 38, 44–52 (2013). https://doi.org/10.3103/S1068373913010068
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DOI: https://doi.org/10.3103/S1068373913010068