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New estimates for the heat flux across the Polar Front: spatial and temporal variability in recent years

Published online by Cambridge University Press:  09 January 2013

João Marcos Azevedo Correia De Souza ,
Afonso De Moraes Paiva  and
Karina Von Schuckmann
João Marcos Azevedo Correia De Souza*
Affiliation:
IFREMER, LOS, Brest, France School of Ocean and Earth Science and Technology (SOEST), University of Hawaii, 1000 Pope Road, Honolulu, HI 96822, USA
Afonso De Moraes Paiva
Affiliation:
UFRJ, COPPE, PEnO, Rio de Janeiro, Brazil
Karina Von Schuckmann
Affiliation:
CNRS, LOCEAN, Paris, France
*
[email protected]
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Abstract

Two different methodologies are applied in order to quantify the eddy contribution to the heat flux across the Polar Front, between January 2006 and December 2009. First, the eddy fluxes are indirectly estimated through a heat balance based on geostrophic fluxes obtained from the Argo climatological temperature and salinity. Second, a parametric model based on sea level anomaly data from a merged satellite product is used to obtain a direct estimate of the eddy heat flux and its temporal and spatial variability. The results obtained through the heat balance (-80.5 ± 16.45 x 1013 W) and the parameterization (-56.2 ± 4.18 x 1013 W) are within the range established by previous studies. The eddy heat flux is observed to be concentrated in a few narrow regions, with a particularly large contribution from the Atlantic sector. A trend of intensification of the southward heat flux is observed in the study period (-0.44 x 1013 W year-1), compatible with recent modelling and observational studies.

Keywords

ARGOMesoscale eddiesMOCSouthern Ocean
Type
Physical Sciences
Information
Antarctic Science , Volume 25 , Issue 3 , June 2013 , pp. 433 - 444
Copyright
Copyright © Antarctic Science Ltd 2013 

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References

Abernathey, R., Marshall, J.Ferreira, D. 2011. The dependence of Southern Ocean meridional overturning on wind stress. Journal of Physical Oceanography, 41, 2261–2278.CrossRefGoogle Scholar
Abernathey, R., Marshall, J.Mazloff, M. 2010. Enhancement of mesoscale eddy stirring at steering levels in the Southern Ocean. Journal of Physical Oceanography, 40, 170–184.CrossRefGoogle Scholar
Böning, C.W., Dispert, A., Visbeck, M., Rintoul, S.R.Schwarzkopf, F.U. 2008. The response of the Antarctic Circumpolar Current to the recent climate change. Nature Geoscience, 1, 864–869.CrossRefGoogle Scholar
Bryden, H.L. 1979. Poleward heat flux and conversion of available potential energy in Drake Passage. Journal of Marine Research, 37, 1–22.Google Scholar
Cabanes, C., Cazenave, A.Provost, C.L. 2001. Sea level rise during past 40 years determined from satellite and in situ observations. Science, 294, 840–842.CrossRefGoogle ScholarPubMed
Chelton, D.B.Freilich, M.H. 2005. Scatterometer-based assessment of 10-m wind analyses from the operational ECMWF and NCEP numerical weather prediction models. Monthly Weather Review, 133, 409–429.CrossRefGoogle Scholar
Chelton, D.B., Schlax, M.G.Samelson, R.M. 2011. Global observations of nonlinear mesoscale eddies. Progress in Oceanography, 91, 167–216.CrossRefGoogle Scholar
Ciasto, L.M.Thompson, D.W.J. 2008. Observations of large-scale ocean–atmosphere interaction in the southern hemisphere. Journal of Climate, 21, 1244–1259.CrossRefGoogle Scholar
Dee, D.P., Uppala, S.M., Simmons, A.J. et al. 2011. The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Quarterly Journal of the Royal Meteorological Society, 137, 553–597.CrossRefGoogle Scholar
De Szoeke, R.A.Levine, M.D. 1981. The advective flux of heat by mean geostrophic motions in the Southern Ocean. Deep-Sea Research I, 28, 1057–1085.CrossRefGoogle Scholar
Fahrbach, E., Hoppema, M., Rohart, G., Boebel, O., Klatt, O.Wisotzki, A. 2011. Warming of deep and abyssal water masses along the Greenwich meridian on decadal time scales: the Weddell gyre as a heat buffer. Deep-Sea Research II, 58, 2509–2523.CrossRefGoogle Scholar
Farneti, R.Delworth, T.L. 2010. The role of mesoscale eddies in the remote oceanic response to altered Southern Hemisphere winds. Journal of Physical Oceanography, 40, 2348–2354.CrossRefGoogle Scholar
Ferrari, R.Nikurashin, M. 2010. Suppression of eddy diffusivity across jets in the Southern Ocean. Journal of Physical Oceanography, 40, 1501–1519.CrossRefGoogle Scholar
Freeland, H. 1987. Oceanic eddy transports and satellite altimetry. Nature, 326, 524.CrossRefGoogle Scholar
Fukamachi, Y., Rintoul, S.R., Church, J.A., Aoki, S., Sokolov, S., Rosenberg, M.A.Wakatsuchi, M. 2010. Strong export of Antarctic Bottom Water east of the Kerguelen plateau. Nature GeoScience, 3, 327–331.CrossRefGoogle Scholar
Fyfe, J.C., Saenko, O.A., Zickfeld, K., Eby, M.Weaver, A.J. 2007. The role of poleward-intensifying winds on Southern Ocean warming. Journal of Climate, 20, 5391–5400.CrossRefGoogle Scholar
Gaillard, F. 2010. ISAS tool version 5.3: method and configuration. SO-Argo Report, 2010. http://wwz.ifremer.fr/lpo/content/download/37810/517378/file/ISAS-docv53_method.pdf.Google Scholar
Gent, P.R.McWilliams, J.C. 1990. Isopycnal mixing in ocean circulation models. Journal of Physical Oceanography, 20, 150–155.2.0.CO;2>CrossRefGoogle Scholar
Gille, S.T. 2008. Decadal-scale temperature trends in the Southern Hemisphere Ocean. Journal of Climate, 21, 4749–4765.CrossRefGoogle Scholar
Holloway, G. 1986. Estimation of oceanic eddy transports from satellite altimetry. Nature, 323, 243–244.CrossRefGoogle Scholar
Holloway, G.Kristmannsson, S. 1984. Stirring and transport of tracer fields by geostrophic turbulence. Journal of Fluid Mechanics, 141, 27–50.CrossRefGoogle Scholar
Hughes, C.W. 1996. The Antarctic Circumpolar Current as a waveguide for Rossby waves. Journal of Physical Oceanography, 26, 1375–1387.2.0.CO;2>CrossRefGoogle Scholar
Hughes, C.W., Meredith, M.P.Heywood, K.J. 1999. Wind-driven transport fluctuations through Drake Passage: a southern mode. Journal of Physical Oceanography, 26, 1971–1992.2.0.CO;2>CrossRefGoogle Scholar
Jayne, S.R.Marotzke, J. 2002. The oceanic eddy heat transport. Journal of Physical Oceanography, 32, 3328–3345.2.0.CO;2>CrossRefGoogle Scholar
Karsten, R.H.Marshall, L. 2002. Constructing the residual circulation of the ACC from observations. Journal of Physical Oceanography, 32, 3315–3327.2.0.CO;2>CrossRefGoogle Scholar
Karsten, R.H., Jones, H.Marshall, J. 2002. The role of eddy transfer in setting the stratification and transport of a circumpolar current. Journal of Physical Oceanography, 32, 39–54.2.0.CO;2>CrossRefGoogle Scholar
Keffer, T.Holloway, G. 1988. Estimating Southern Ocean eddy flux of heat and salt from satellite altimetry. Nature, 332, 624–626.CrossRefGoogle Scholar
Kerr, R., Mata, M.M.Garcia, C.A.E. 2009. On the temporal variability of the Weddell Sea Deep Water masses. Antarctic Science, 21, 383–400.CrossRefGoogle Scholar
Luis, A.J.Pandey, P.C. 2004. Seasonal variability of QSCAT-derived wind stress over the Southern Ocean. Geophysical Research Letters, 10.1029/2003GL019355.CrossRefGoogle Scholar
Meijers, A.J., Bindoff, N.L.Rintoul, S.R. 2011. Frontal movements and property fluxes: contributions to heat and freshwater trends in the Southern Ocean. Journal of Geophysical Research, 10.1029/2010JC006832.CrossRefGoogle Scholar
Meijers, A.J., Bindoff, N.L.Roberts, J.L. 2007. On the total, mean, and eddy heat and freshwater transports in the Southern Hemisphere of a 1/8° x 1/8° global ocean model. Journal of Physical Oceanography, 37, 277–295.CrossRefGoogle Scholar
Meredith, M.P.Hogg, A.M. 2006. Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode. Geophysical Research Letters, 10.1029/2006GL026499.CrossRefGoogle Scholar
Meredith, M.P., Woodworth, P.L., Hughes, C.W.Stepanov, V. 2004. Changes in the ocean transport through Drake Passage during the 1980s and 1990s, forced by changes in the Southern Annular Mode. Geophysical Research Letters, 10.1029/2004GL021169.CrossRefGoogle Scholar
Morrow, R., Valladeau, G.Sallee, J.B. 2008. Observed subsurface signature of Southern Ocean sea level rise. Progress in Oceanography, 77, 351–366.CrossRefGoogle Scholar
Olbers, D., Borowski, D., Völker, C.Wölf, J. 2004. The dynamical balance, transport and circulation of the Antarctic Circumpolar Current. Antarctic Science, 16, 439–470.CrossRefGoogle Scholar
Orsi, A.H., Whitworth, T. IIINowlin, W.D. Jr 1995. On the meridional extent and fronts of the Antarctic Circumpolar Current. Deep-Sea Research I, 42, 641–673.CrossRefGoogle Scholar
Phillips, H.E.Rintoul, S.R. 2000. Eddy variability and energetics from direct current measurements in the Antarctic Circumpolar Current south of Australia. Journal of Physical Oceanography, 30, 3050–3076.2.0.CO;2>CrossRefGoogle Scholar
Pond, S.Pickard, G.L. 1983. Introductory dynamical oceanography, 2nd edition. Oxford: Butterworth-Heinemann, 329 pp.Google Scholar
Purkey, S.G.Johnson, G.C. 2010. Warming of global abyssal and deep Southern Ocean waters between the 1990s and 2000s: contributions to global heat and sea level rise budgets. Journal of Climate, 23, 6336–6351.CrossRefGoogle Scholar
Rintoul, S.R., Hughes, C.W.Olbers, D. 2001. The Antarctic Circumpolar Current system. In Siedler, G., Church, J.&Gould,J.,eds. Ocean circulation and climate. New York: Academic Press, 271–302.Google Scholar
Saenko, O.A., Fyfe, J.C.England, M.H. 2005. On the response of the oceanic wind-driven circulation to atmospheric CO2 increase. Climate Dynamics, 25, 415–426.CrossRefGoogle Scholar
Sato, O.T.Polito, P.S. 2005. Comparison of the global meridional Ekman heat flux estimated from four wind sources. Journal of Physical Oceanography, 35, 94–108.CrossRefGoogle Scholar
Screen, J., Gillet, N., Stevens, D., Marshall, G.Roscoe, H. 2009. The role of eddies in the Southern Ocean temperature response to the Southern Annular Mode. Journal of Climate, 22, 806–818.CrossRefGoogle Scholar
Simmons, A.J., Uppala, S., Dee, D.P.Kobayashi, S. 2006. ERA-Interim: new ECMWF reanalysis products from 1989 onwards. ECMWF Newsletter, 110, 25–35.Google Scholar
Simmons, A.J., Willett, K.M., Jones, P.D., Thorne, P.W.Dee, D.P. 2010. Low-frequency variations in surface atmospheric humidity, temperature, and precipitation: inferences from reanalyses and monthly gridded observational datasets. Journal of Geophysical Research, 10.1029/2009JD012442.CrossRefGoogle Scholar
Sloyan, B.M.Rintoul, S.R. 2000. Estimates of area-averaged diapycnal fluxes from basin-scale budgets. Journal of Physical Oceanography, 30, 2320–2341.2.0.CO;2>CrossRefGoogle Scholar
Stammer, D. 1998. On eddy characteristics, eddy transports, and mean flow properties. Journal of Physical Oceanography, 28, 727–739.2.0.CO;2>CrossRefGoogle Scholar
Stössel, A.Kim, S.J. 2001. Decadal deep-water variability in the subtropical Atlantic and convection in the Weddell Sea. Journal of Geophysical Research, 106, 22 425–22 440.CrossRefGoogle Scholar
Taylor, H.W., Gordon, A.L.Molinelli, E. 1978. Climatic characteristics of the Antarctic Polar Front zone. Journal of Geophysical Research, 83, 4572–4578.CrossRefGoogle Scholar
Von Schuckmann, K.Le Traon, P.Y. 2011. How well can we derive Global Ocean Indicators from Argo data? Ocean Science, 7, 783–791.CrossRefGoogle Scholar
Von Schuckmann, K., Gaillard, F.Le Traon, P.Y. 2009. Global hydrographic variability patterns during 2003–2008. Journal of Geophysical Research, 10.1029/2008JC005237.CrossRefGoogle Scholar
Walkden, G.J., Heywood, K.J.Stevens, D.P. 2008. Eddy heat fluxes from direct current measurements of the Antarctic Polar Front in Shag Rocks Passage. Geophysical Research Letters, 10.1029/2007GL032767.CrossRefGoogle Scholar