MODELING OF WATER CIRCULATION IN THE ANTARCTIC SUBGLACIAL LAKE VOSTOK

G. V. Kazko; L. M. Savatyugin; I. N. Sokratova

doi:10.15356/2076-6734-2012-4-86-91

MODELING OF WATER CIRCULATION IN THE ANTARCTIC SUBGLACIAL LAKE VOSTOK

G. V. Kazko, L. M. Savatyugin, I. N. Sokratova

https://doi.org/10.15356/2076-6734-2012-4-86-91

Abstract

Different ways of defining the characteristics of Antarctic subglacialLakeVostokcirculation are considered. The disadvantages of hydrodynamic models using the hydrostatic approximation exposed to analysis. Differential equations and boundary conditions of three-dimensional nonhydrostatic model in terms vorticity–vector potential, specially developed for the modelling of the lake circulation are presented. 3D model passed through the testing by means simulations of convective currents in the simple-form reservoirs. On the basis of the seismic data on the thickness of a glacier and bathimetry of the lake the computational domain approximating a water body ofLakeVostokis constructed. Some results of modeling of the convective processes in the lake, obtained at the initial stage of circulation evolution using finite-difference grid with a spatial resolution of 8000 × 1500 ×30 mare shown.

Keywords

Antarctic continent, circulation, convection, Lake Vostok, modeling, nonhydrostatic, thermal regime,

About the Authors

G. V. Kazko

Arctic and Antarctic Research Institute, Sankt-Petersburg
Russian Federation

L. M. Savatyugin

Arctic and Antarctic Research Institute, Sankt-Petersburg
Russian Federation

I. N. Sokratova

Arctic and Antarctic Research Institute, Sankt-Petersburg
Russian Federation

References

1. Lavrentiev M.A., Shabat B.V. Problemy gidrodinamiki i ikh matematicheskie modeli. Problems of hydrodynamics and their mathematical models. Moscow: Nauka, 1973: 416 p.

2. Popov S.V., Masolov V.N., Lukin V.V. Lake Vostok, East Antarctica: ice thickness, depth of the lake, subglacial and bedrock relief. Led i Sneg. Ice and Snow. 2011, 1 (113): 25–35.

3. Fernando H.J.S., Smith D.C. Vortex structures in geophysical convection. Eur. J. Mech. 2001, 20: 437–470.

4. Fofonoff P., Millard Jr. Algorithms for computations of fundamental properties of seawater. UNESCO Technical Papers in Marine Science, UNESCO. 1983, 44: 53.

5. Gerdes R. A primitive equation ocean circulation model using a general vertical transformation. Pt. 1: Description and testing of the model. Journ. of Geophys. Research. 1993, 98 (14): 683–701.

6. Kazko G.V. Estimates of some parameters of lake Vostok circulation, found with a two-dimensional nonhydrostatic model. Physics of Vibrations. 2001, 9 (3): 182–188.

7. Mayer C., Grosfeld K., Siegert M.J. Salinity impact on flow a lake ice in Lake Vostok, Antarctica. Geophys. Research Letters. 2003, 30 (14): 81–84.

8. Petit J.-R. Geophysical, geochemical, glaciological and energy balance model constraints to the lake Vostok. Materialy Glyatsiologicheskikh Issledovaniy. Data of Glaciological Studies. 2004, 97: 91–100.

9. Thoma M., Grosfeld K., Mayer C. Modelling mixing and circulation in subglacial Lake Vostok, Antarctica. Ocean Dynamics. 2007, 57 (6): 531–540.

10. Wells M.G., Wettlaufer J.S. Circulation in Lake Vostok: A laboratory analogue study. Geophys. Research Letters. 2008, 35. L03501: 281–286.

11. Williams M.J.M. Application of a three-dimensional numerical model to Lake Vostok: An Antarctic subglacial lake. Geophys. Research Letters. 2001, 28 (3): 531–534.

12. Wüest A., Carmack E. A priori estimates of mixing and circulation in the hard-to-reach water body of Lake Vostok. Ocean Modeling. 2001, 2: 29–49.

Supplementary files

For citation: Kazko G.V., Savatyugin L.M., Sokratova I.N. MODELING OF WATER CIRCULATION IN THE ANTARCTIC SUBGLACIAL LAKE VOSTOK. Ice and Snow. 2012;52(4):86-91. https://doi.org/10.15356/2076-6734-2012-4-86-91

Refbacks

There are currently no refbacks.

This work is licensed under a Creative Commons Attribution 4.0 License.

ISSN 2076-6734 (Print)
ISSN 2412-3765 (Online)

Username
Password