Abstract
Deep convection in polar oceans plays a critical role in the variability of global climate. In this study, we investigate potential impacts of atmosphere–sea ice–ocean interaction on deep convection in the Southern Ocean (SO) of a climate system model (CSM) by changing sea ice–ocean stress. Sea ice–ocean stress plays a vital role in the horizontal momentum exchange between sea ice and the ocean, and can be parameterized as a function of the turning angle between sea ice and ocean velocity. Observations have shown that the turning angle is closely linked to the sea-ice intrinsic properties, including speed and roughness, and it varies spatially. However, a fixed turning angle, i.e., zero turning angle, is prescribed in most of the state-of-the-art CSMs. Thus, sensitivities of SO deep convection to zero and non-zero turning angles are discussed in this study. We show that the use of a non-zero turning angle weakens open–ocean deep convection and intensifies continental shelf slope convection. Our analyses reveal that a non-zero turning angle first induces offshore movement of sea ice transporting to the open SO, which leads to sea ice decrease in the SO coastal region and increase in the open SO. In the SO coastal region, the enhanced sea-ice divergence intensifies the formation of denser surface water descending along continental shelf by enhanced salt flux and reduced freshwater flux, combined with enhanced Ekman pumping and weakened stratification, contributing to the occurrence and intensification of continental shelf slope convection. On the other hand, the increased sea ice in the open SO weakens the westerlies, enhances sea-level pressure, and increases freshwater flux, whilst oceanic cyclonic circulation slows down, sea surface temperature and sea surface salinity decrease in the open SO response to the atmospheric changes. Thus, weakened cyclonic circulation, along with enhanced freshwater flux, reduced deep–ocean heat content, and increased stability of sea water, dampens the open–ocean deep convection in the SO, which in turn cools the sea surface temperature, increases sea-level pressure, and finally increases sea-ice concentration, providing a positive feedback. In the CSM, the use of a non-zero turning angle has the capability to reduce the SO warm bias. These results highlight the importance of an accurate representation of sea ice–ocean coupling processes in a CSM.
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References
Akitomo K (1999a) Open–ocean deep convection due to thermobaricity 1. Scaling argument. J Geophys Res 104:5225–5234
Akitomo K (1999b) Open–ocean deep convection due to thermobaricity 2. Numerical experiments. J Geophys Res 104:5235–5249
Anderson RF, Ali S, Bradtmiller LI, Nielsen SHH et al (2009) Wind-driven upwelling in the Southern Ocean and the Deglacial Rise in atmospheric CO2. Science 323:1443–1448
Balmaseda MA, Mogensen K, Weaver AT (2013) Evaluation of the ECMWF ocean reanalysis system ORAS4. QJR Meteorol Soc 139:1132–1161
Behrens E, Rickard G, Morgenstern O, Martin T, Osprey A, Joshi M (2016) Southern Ocean deep convection in global climate models: a driver for variability of subpolar gyres and Drake Passage transport on decadal timescales. J Geophys Res Oceans 121:3905–3925
Born A, Nisancioglu KH, Braconnot P (2010) Sea ice induced changes in ocean circulation during the Eemian. Climate Dyn 35:1361–1371
Cao J, Wang B, Yang YM, Ma LB et al (2018) The NUIST Earth System Model (NESM) version 3: description and preliminary evaluation. Geosci Model Dev 11:2975–2993
Cappelletti A, Picco P, Peluso T (2010) Upper ocean layer dynamics and response to atmospheric forcing in the Terra Nova Bay polynya. Antarctica. Antarct Sci 22(3):319–329
Cheon WG, Park YG, Toggweiler JR, Lee SK (2014) The relationship of Weddell Polynya and open–ocean deep convection to the Southern Hemisphere westerlies. J Phys Oceanogr 44:694–713
Cheon WG, Lee S-K, Gordon AL et al (2015) Replicating the 1970’s Weddell Polynya using a coupled ocean-sea ice model with reanalysis surface flux fields. Geophys Res Lett 42:5411–5418
Cheon WG, Cho C-B, Gordon AL et al (2018) The role of oscillating Southern Hemisphere westerly winds: Southern Ocean coastal and open–ocean polynyas. J Climate 31:1053–1073
Chu PC (2015) Ekman spiral in a horizontally inhomogeneous ocean with varying eddy viscosity. Pure Appl Geophys 172:2831–2857
Danabasoglu G (2008) On multidecadal variability of the Atlantic Meridional overturning circulation in the Community Climate system model version 3. J Climate 21:5524–5544
Defant A (1961) Physical oceanography, vol 1. Pergamon Press, Oxford
de Lavergne C, Palter JB, Galbraith ED, Bernardello R, Marinov I (2014) Cessation of deep convection in the open Southern Ocean under anthropogenic climate change. Nat Climate Change 4:278–282
Delworth T, Manabe S, Stouffer RJ (1993) Interdecadal variations of the thermohaline circulation in a coupled ocean-atmosphere model. J Climate 6:1993–2011
Dong B, Sutton R (2001) The dominant mechanisms of variability in Atlantic Ocean heat transport in a coupled ocean-atmospheric GCM. Geophys Res Lett 28:2445–2448
Fahrbach E, Rohardt G, Scheele N, Schröder M, Strass V, Wisotzki A (1995) Formation and discharge of deep and bottom water in the northwestern Weddell Sea. J Mar Res 53:515–538
Ferrari R et al (2014) Antarctic sea ice control on ocean circulation in present and glacial climates. Proc Natl Acad Sci USA 111:8753–8758
Frankignoul C, Deshayes J, Curry R (2009) The role of salinity in the decadal variability of the North Atlantic meridional overturning circulation. Climate Dyn 33:777–793
Frölicher TL et al (2015) Dominance of the Southern Ocean in anthropogenic carbon and heat uptake in CMIP5 models. J Climate 28:862–886
Galbraith ED et al (2011) Climate variability and radiocarbon in the CM2MC Earth System Model. J Climate 24:4230–4254
Ge X, Wang W, Kumar A, Zhang Y (2017) Importance of the vertical resolution in simulating SST diurnal and intraseasonal variability in an oceanic general circulation model. J Clim 30(11):3963–3978
Gordon AL (1978) Deep Antarctic convection west of Maud Rise. J Phys Oceanogr 8:600–612
Gordon AL (1982) Weddell deep water variability. J Mar Res 40:199–217
Gordon AL, Comiso JC (1987) Polynyas in the southern ocean. Sci Am 256:90–97
Gordon AL, Huber BA (1990) Southern Ocean winter mixed layer. J Geophys Res 95:11655–11672
Gordon AL, Visbeck M, Comiso JC (2007) A possible link between the Weddell polynya and the Southern Annular Mode. J Climate 20:2558–2571
Haumann FA, Gruber N, Münnich M, Frenger I, Kern S (2016) Sea-ice transport driving Southern Ocean salinity and its recent trends. Nature 537:89–92
Heuzé C, Heywood KJ, Stevens DP, Ridley JK (2013) Southern Ocean bottom water characteristics in CMIP5 models. Geophys Res Lett 40:1409–1414
Hirabara M, Tsujino H, Nakano H, Yamanaka G (2012) Formation mechanism of the Weddell Sea Polynya and the impact on the global abyssal ocean. J Oceanogr 68:771–796
Holland DM (2001) Explaining the Weddell Polynya—a large ocean eddy shed at Maud Rise. Science 292:1697–1700
Hunke EC (2010) Thickness sensitivities in the CICE sea ice model. Ocean Model 34:137–149
Hunke EC, Lipscomb WH (2010) CICE: the Los Alamos Sea Ice Model documentation and software user’s manual version 4.1. LA-CC-06-012, p 76
Hunkins K (1966) Ekman drift currents in the Arctic Ocean. Deep Sea Res 13:607–620
Hurrell JW, Holland MM, Gent PR et al (2013) The community earth system model: a framework for collaborative research. Bull Am Meteorol Soc 9:1339–1360
Hyder P, Edwards JM et al (2018) Critical Sothern Ocean climate model biases traced to atmospheric model cloud errors. Nat Commun 9:3625. https://doi.org/10.1038/s41467-018-056634-2
Jackson L, Vellinga M (2012) Multidecadal to centennial variability of the AMOC: HadCM3 and a perturbed physics ensemble. J Climate 26:2390–2407
Killworth PD (1983) Deep convection in the world ocean. Rev Geophys Space Phys 21:1–26
Madec G (2012) NEMO ocean engine. ISSN No 1288-1619, p 366
Marshall J, Schott F (1999) Open–ocean deep convection: Observations, theory, and models. Rev Geophys 37:1–64
Marshall J, Speer K (2012) Closure of the meridional overturing circulation through Southern Ocean upwelling. Nat Geosci 5:171–180
Martin T, Park WS, Latif M (2013) Multi-centennial variability controlled by Southern Ocean convection in the Kiel Climate Model. Climate Dyn 40:2005–2022
Martinson DG (1991) Deep convection and deep water formation in the oceans. In: Chu PC, Gascard JC (eds) Elsevier oceanography series, pp 37–52
Martinson DG, Killworth PD, Gordon AL (1981) A convective model for the Weddell Polynya. J Phys Oceanogr 11:466–488
McPhee MG (1980) An analysis of pack ice drift in summer. In: Pritchard R (ed) Sea ice processes and models. University of Washington Press, Seattle, pp 62–75
McPhee MG (2012) Advances in understanding ice-ocean stress during and since AIDJEX. Cold Region Sci Technol 76–77:24–36
Morales Maqueda MA, Willmott AJ, Biggs NRT (2004) Polynya dynamics: a review of observations and modeling. Rev Geophys. https://doi.org/10.1029/2002RG000116
Morgenstern O, Zeng G, Dean SM, Hoshi M, Abraham NL, Osprey A (2014) Direct and ozone-mediated forcing in the Southern annual mode by greenhouse gas. Geophys Res Lett 41:9050–9057
Msadek R, Frankignoul C (2009) Atlantic multidecadal oceanic variability and its influence on the atmosphere in a climate model. Climate Dyn 33:45–62
Ohshima KI, Nakanowatari T, Riser S, Volkov Y, Wakatsuchi M (2014) Freshening and dense shelf water reduction in the Okhotsk Sea linked with sea ice decline. Prog Oceanogr 126:71–79
Orsi AH, Johnson GC, Bullister JL (1999) Circulation, mixing, and production of Antarctic Bottom Water. Prog Oceanogr 43:55–109
Park W, Latif M (2008) Multidecadal and multicentennial variability of the meridional overturning circulation. Geophys Res Lett 35:L22703. https://doi.org/10.1029/2008GL035779
Park W, Keenlyside N, Latif M et al (2009) Tropical pacific climate and its response to global warming in the Kiel Climate Model. J Climate 22:71–92
Raddatz TJ, Reick CH, Kattge J et al (2007) Will the tropical land biosphere dominate the climate-carbon cycle feedback during the twenty-first century? Climate Dyn 29:565–574
Reintges A, Martin T, Latif M, Park W (2017) Physical controls of Southern Ocean deep-convection variability in CMIP5 models and the Kiel Climate Model. Geophys Res Lett 44:6951–6958
Roberts CD, Garry FK, Jackson LC (2013) A multimodel study of sea surface temperature and subsurface density fingerprints of the Atlantic Meridional Overturning Circulation. J Climate 26:9155–9174
Robertson R, Visbeck M, Gordon AL, Fahrbach E (2002) Longterm temperature trends in the deep waters of the Weddell Sea. Deep Sea Res II 49:4791–4806
Rusciano E, Budillon G, Fusco G, Spezie G (2013) Evidence of atmosphere–sea ice–ocean coupling in the Terra Nova Bay polynya (Ross Sea—Antarctica). Cont Shelf Res 61–62:112–124
Saenko OA, Schmittner A, Weaver AJ (2002) On the role of wind-driven sea ice motion on ocean ventilation. J Phys Oceanogr 32:3376–3395
Schneider DP, Reusch DB (2016) Antarctic and southern ocean surface temperatures in CMIP5 models in the context of the surface energy budget. J Climate 29:1689–1716
Sigman DM, Hain MP, Haug GH (2010) The polar ocean and glacial cycles in atmospheric CO2 concentration. Nature 466:47–55
Smith S, Muench RD, Pease CH (1990) Polynyas and leads: an overview of physical processes and environment. J Geophys Res 95:9461–9479
Stevens B et al (2013) The atmospheric component of the MPI-M Earth System Model: ECHAM6. J Adv Model Earth Syst 5:146–172
Tsamados M, Feltham DL, Schroeder D, Flocco D (2014) Impact of variable atmospheric and oceanic form drag on simulations of Arctic sea ice. J Phys Oceanogr 44:1329–1353
Uotila P, O’Farrell S, Marsland SJ, Bi D (2012) A sea-ice sensitivity study with a global ocean-ice model. Ocean Model 51:1–18
Valcke S, Coquart L (2015) OASIS-MCT user guide: OASIS-MCT 3.0. CERFACS TR/CMGC/15/38, p 58
Wang CZ, Zhang LP, Lee S-K, Wu LX, Mechoso CR (2014) A global perspective on CMIP5 climate model biases. Nat Climate Change 4:201–205
Wang ZM, Wu Y, Lin X, Liu CY, Xie ZL (2017) Impacts of open–ocean deep convection in the Weddell Sea on coastal and bottom water temperature. Climate Dyn 48:2967–2981
Williams WJ, Carmarck EC, and Ingram RG (2007) Physical oceanography of polynyas. In: Smith W and Barber D (eds) Chap 2: Polynyas: windows to the world. Elsevier oceanography series, vol 74. Elsevier, pp 55–85
Zika JD, Sommer JL, Dufour CO, Naveira-Garabato A, Blaker A (2013) Acceleration of the Antarctic circumpolar current by wind stress along the coast of Antarctica. J Phys Oceanogr 43:2772–2784
Acknowledgements
This study is supported by the grant 2018YFA0605904 from the National Major Research High Resolution Sea Ice Model Development Program of China. This study is also sponsored by the Basic Research Fund of CAMS (2018Z007) and the Startup Foundation for Introducing Talent of NUIST (No. 2018r064). This is the IPRC publication number 1435 and ESMC publication number 303.
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Ma, L., Wang, B. & Cao, J. Impacts of atmosphere–sea ice–ocean interaction on Southern Ocean deep convection in a climate system model. Clim Dyn 54, 4075–4093 (2020). https://doi.org/10.1007/s00382-020-05218-1
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DOI: https://doi.org/10.1007/s00382-020-05218-1