Modelling of the Svalbard fjord Hornsund

• Autorzy: Jakacki J. , Przyborska A. , Kosecki S. , Sundfjord A. , Albretsen J.

Identyfikatory

DOI

10.1016/j.oceano.2017.04.004

• Języki publikacji: EN

Abstrakty

EN

The Arctic Ocean is currently in transition towards a new, warmer state. Understanding the regional variability of oceanographic conditions is important, since they have a direct impact on local ecosystems. This work discusses the implementation of a hydrodynamic model for Hornsund, the southernmost fjord of western Svalbard. Despite its location, Hornsund has a stronger Arctic signature than other Svalbard fjords. The model was validated against available data, and the seasonal mean circulation was obtained from numerical simulations. Two main general circulation regimes have been detected in the fjord. The winter circulation represents a typical closed fjord system, while in summer the fresh water discharge from the catchment area generates a surface layer with a net flow out of Hornsund. Also described are the local hydrographic front and its seasonal variability, as well as the heat and salt content in Hornsund. The integration of salt and heat anomalies provides additional information about the salt flux into the innermost basin of the fjord - Brepollen during the summer. Extensive in situ observations have been collected in Hornsund for the last two decades but our hydrodynamic model is the first ever implemented for this area. While at the moment in situ observations better represent the state of this fjord's environment and the location of measurements, a numerical model, despite its flaws, can provide a more comprehensive image of the entire fjord's physical state. In situ observations and numerical simulations should therefore be regarded as complementary tools, with models enabling a better interpretation and understanding of experimental data.

Słowa kluczowe

EN

hydrodynamic model fjord circulation; heat content; heat anomalies; salt content; salt anomalies; Hornsund model

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2017
• Tom: No. 59 (4)
• Strony: 473--495
• Opis fizyczny: Bibliogr. 28 poz., mapy, tab., wykr.

Twórcy

autor

Jakacki J.

• Institute of Oceanology, Polish Academy of Sciences, Sopot, Poland

autor

Przyborska A.

• Institute of Oceanology, Polish Academy of Sciences, Sopot, Poland

autor

Kosecki S.

• Institute of Oceanology, Polish Academy of Sciences, Sopot, Poland

autor

Sundfjord A.

• Norwegian Polar Institute, Tromsø, Norway

autor

Albretsen J.

• Institute of Marine Research, Bergen, Norway

Bibliografia

• [1] Albretsen, J., Hattermann, T., Sundfjord, A., 2017. Ocean and sea ice circulation model results from Svalbard area (ROMS) [Data set]. Norwegian Polar Institute, http://dx.doi.org/10.21334/npolar.2017.2f52acd2.
• [2] Błaszczyk, M., Jania, J., Kolondra, L., 2013. Fluctuations of tidewater glaciers in Hornsund Fjord (Southern Svalbard) since the beginning of the 20th century. Pol. Polar Res. 34 (4), 327-352, http://dx.doi.org/10.2478/popore-2013-0024.
• [3] Budgell, W. P., 2005. Numerical simulation of ice-ocean variability in the Barents Sea region: towards dynamical downscaling. Ocean Dynam. 55 (3), 370-387, http://dx.doi.org/10.1007/s10236-005-0008-3.
• [4] Chassignet, E. H., Hurlburt, H. E., Smedstad, O. M., Halliwell, G. R., Hogan, P. J., Wallcraft, A. P., Bleck, R., 2006. Ocean prediction with the hybrid coordinate ocean model (HYCOM). In: Chassignet, E. P., Verron, J. (Eds.), Ocean Weather Forecasting. Springer, Dordrecht, 577 pp., http://dx.doi.org/10.1007/1-4020-4028-8.
• [5] Cottier, F. R., Nilsen, F., Skogseth, R., Tverberg, V., Skarthhamar, J., Svendsen, H., 2010. Arctic fjords: a review of the oceanographic environment and dominant physical processes. Geol. Soc. London, Spec. Publ. 344 (1), 35-50, http://dx.doi.org/10.1144/SP344.4.
• [6] Cottier, F., Tverberg, V., Inall, M., Svendsen, H., Nilsen, F., Griffiths, C., 2005. Water mass modification in an arctic fjord through crossshelf exchange: the seasonal hydrography of kongsfjorden, Svalbard. J. Geophys. Res. 110 (C12), 18 pp., http://dx.doi.org/10.1029/2004JC002757.
• [7] Counillon, F., Sakov, P., Bertino, L., 2010. Development of TOPAZ4 prototype. In: EGU General Assembly Conference Abstracts.
• [8] Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B., Hersbach, H., Hólm, E. V., Isaksen, L., Kållberg, P., Köhler, M., Matricardi, M., McNally, A. P., Monge-Sanz, B. M., Morcrette, J. J., Park, B. K., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J. N., Vitart, F., 2011. The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Quarter. J. R. Meteorol. Soc. 137 (656), 553-597, http://dx.doi.org/10.1002/qj.828.
• [9] Egbert, G. D., Erofeeva, S. Y., 2002. Efficient inverse modeling of barotropic ocean tides. J. Atmos. Ocean. Technol. 19, 183-204, http://dx.doi.org/10.1175/1520-0426(2002)019<0183:EIMOBO>2.0.CO;2.
• [10] Fedorov, K. N., 1986. The Physical Nature and Structure of Oceanic Fronts. Springer-Verlag, New York, 333 pp.
• [11] Flather, R. A., 1976. A tidal model of the northwest European Continental shelf. Mem. Soc. Roy. Sci. Liege 6 (10), 141-164.
• [12] Frankowski, M., Zioła-Frankowska, A., 2014. Analysis of labile form of aluminum and heavy metals in bottomsediments from Kongsfjord, Isfjord, Hornsund fjords. Environ. Earth Sci. 71 (3), 1147-1218, http://dx.doi.org/10.1007/s12665-013-2518-5.
• [13] Ginzburg, A. I., Kostianoy, A. G., 2009. Front and mixing processes. Oceanography 1, 7 pp.
• [14] Gluchowska, M., Kwasniewski, S., Prominska, A., Olszewska, A., Goszczko, I., Falk-Petersen, S., Hop, H., Weslawski, J. M., 2016. Zooplankton in Svalbard fjords on the Atlantic-Arctic boundary. Polar Biol. 39 (10), 1-18, http://dx.doi.org/10.1007/s00300-016-1991-1.
• [15] Haidvogel, D. B., Arango, H., Budgell, W. P., Cornuelle, B. D., Curchitser, E., Di Lorenzo, E., Fennel, K., Geyer, W. R., Hermann, A. J., Lanerolle, L., Levin, J., McWilliams, J. C., Miller, A. J., Moore, A. M., Powell, T. M., Shchepetkin, A. F., Sherwood, C. R., Signell, R. P., Warner, J. C., Wilkin, J., 2008. Ocean forecasting in terrainfollowing coordinates: formulation and skill assessment of the Regional Ocean Modeling System. J. Comp. Phys. 222 (7), 3595-3624, http://dx.doi.org/10.1016/j.jcp.2007.06.016.
• [16] Hattermann, T., Isachsen, P. E., von Appen, W.-J., Albretsen, J., Sundfjord, A., 2016. Eddy-driven recirculation of Atlantic Water in Fram Strait. Geophys. Res. Lett. 43 (7), 3406-3414, http://dx.doi.org/10.1002/2016GL068323.
• [17] Jeżowiecka-Kabsch, K., Szewczyk, H., 2001. Mechanika płynów. Oficyna Wyd. Politech. Wroc., Wrocław, 386 pp.
• [18] Kantha, L. H., Clayson, C. A., 2000. Numerical Models of Oceans and Oceanic Processes. Acad. Press, San Diego, 750 pp.
• [19] Kowalik, Z., Marchenko, A., Brazhnikov, D., Marchenko, N., 2015. Tidal currents in the western Svalbard Fjords. Oceanologia 57 (4), 318-332, http://dx.doi.org/10.1016/j.oceano.2015.06.003.
• [20] Lien, V. S., Vikebø, F. B., Skagseth, Ø., 2013. One mechanism contributing to co-variability of the Atlantic inflow branches to the Arctic. Nat. Commun., http://dx.doi.org/10.1038/ncomms2505 Art No. 1488.
• [21] MIKE_DHI, 2014. MIKE 21 Toolbox. Global Tide Model — Tidal Prediction. DHI, Hørsholm, 20 pp.
• [22] MIKE and Doc. 2010-2014. MIKE 21 & MIKE 3 Flow Model FM. Hydrodynamic Module, Sci. Doc., DHI, Hørsholm, 14 pp.
• [23] Nilsen, F., Cottier, F., Skogseth, R., Mattsson, S., 2008. Fjord-shelf exchange controlled by ice and brine production: the interannual variation of Atlantic Water in Isfjorden, Svalbard. Cont. Shelf Res. 28 (14), 1838-1853, http://dx.doi.org/10.1016/j.csr.2008.04.015.
• [24] Sakov, P., Counillon, F., Bertino, L., Lisæter, K. A., Oke, P. R., Korablev, A., 2012. TOPAZ4: an ocean-sea ice data assimilation system for the North Atlantic and Arctic. Ocean Sci. 8 (4), 633-656, http://dx.doi.org/10.5194/os-8-633-2012.
• [25] Shchepetkin, A. F., McWilliams, J. C., 2009. Correction and commentary for “Ocean forecasting in terrain-following coordinates: formulation and skill assessment of the regional ocean modeling system” by Haidvogel et al. J. Comp. Phys. 228 (24), 8985-9000, http://dx.doi.org/10.1016/j.jcp.2009.09.002.
• [26] Węsławski, J. M., Koszteyn, J., Zajaczkowski, M., 1995. Fresh water in Svalbard fjord ecosystems. In: Skjodal, H. R., Hopking, C., Erikstad, K. E., Leinaa, H. P. (Eds.), Ecology of Fjords and Coastal Waters. Elsevier, Amsterdam, 229-241.
• [27] Walczowski, W., 2007. Warm anomalies propagation in the west spistbergen current. Probl. Klimatol. Polar. 17, 71-76, (in Polish with English summary).
• [28] Walczowski, W., 2013. Frontal structures in the West Spitsbergen Current margins. Ocean Sci. 9 (6), 957-975, http://dx.doi.org/10.5194/os-9-957-2013.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).