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The transient response of atmospheric and oceanic heat transports to anthropogenic warming

Nature Climate Change (2019) | Download Citation

Abstract

Model projections of the near-future response to anthropogenic warming show compensation between meridional heat transports by the atmosphere (AHT) and ocean (OHT) that are largely symmetric about the equator1,2,3, the causes of which remain unclear. Here, using both the Coupled Model Intercomparison Project Phase 5 archive and Community Climate System Model version 4 simulations forced with Representative Concentration Pathway 8.5 to 2600, we show that this transient compensation—specifically during the initial stage of warming—is caused by combined changes in both atmospheric and oceanic circulations. In particular, it is caused by a southward OHT associated with a weakened Atlantic Meridional Overturning Circulation, a northward apparent OHT associated with an ocean heat storage maximum around the Southern Ocean, and a symmetric coupled response of the Hadley and Subtropical cells in the Indo-Pacific basin. It is further shown that the true advective OHT differs from the flux-inferred OHT in the initial warming due to the inhomogeneous responses of ocean heat storage. These results provide new insights to further our understanding of future heat transport responses, and thereby global climatic processes such as the redistribution of ocean heat.

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Data availability

The CMIP5 data used in this study can be downloaded from the Program for Climate Model Diagnosis and Intercomparison (http://cmip-pcmdi.llnl.gov/cmip5/data_portal.html). The CESM-LE data can be found at http://www.cesm.ucar.edu/projects/community-projects/LENS/. The CCSM4 data and the data supporting the findings of this study are available from the corresponding author upon request.

Additional information

Journal peer review information Nature Climate Change thanks Yen-Ting Hwan and other anonymous reviewer(s) for their contribution to the peer review of this work.

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References

  1. 1.

    Held, I. & Soden, B. J. Robust response of the hydrological cycle to global warming. J. Clim. 19, 5686–5699 (2006).

  2. 2.

    Zelinka, M. D. & Hartmann, D. L. Climate feedbacks and their implications for poleward energy flux changes in a warming climate. J. Clim. 25, 608–624 (2012).

  3. 3.

    Hu, A., Meehl, G. A., Han, W., Lu, J. & Strand, W. G. Energy balance in a warm world without the ocean conveyor belt and sea ice. Geophys. Res. Lett. 40, 6242–6246 (2013).

  4. 4.

    Ganachaud, A. & Wunsch, C. Improved estimates of global ocean circulation, heat transport and mixing from hydrographic data. Nature 408, 453–457 (2000).

  5. 5.

    Collins, M. et al. Challenges and opportunities for improved understanding of regional climate dynamics. Nat. Clim. Change 8, 101–108 (2018).

  6. 6.

    Hwang, Y. T. & Frierson, D. M. W. Increasing atmospheric poleward energy transport with global warming. Geophys. Res. Lett. 37, 1–5 (2010).

  7. 7.

    Bjerknes, J. Atlantic air–sea interaction. Adv. Geophys. 10, 1–82 (1964).

  8. 8.

    Zhao, Y., Yang, H. & Liu, Z. Assessing Bjerknes compensation for climate variability and its time-scale dependence. J. Clim. 29, 5501–5512 (2016).

  9. 9.

    Liu, Z. et al. Local and remote responses of atmospheric and oceanic heat transports to climate forcing: compensation versus collaboration. J. Clim. 31, 6445–6460 (2018).

  10. 10.

    Yang, H., Zhao, Y. & Liu, Z. Understanding Bjerknes compensation in atmosphere and ocean heat transports using a coupled box model. J. Clim. 29, 2145–2160 (2016).

  11. 11.

    Gleckler, P. J., Durack, P. J., Stouffer, R. J., Johnson, G. C. & Forest, C. E. Industrial-era global ocean heat uptake doubles in recent decades. Nat. Clim. Change 6, 394–398 (2016).

  12. 12.

    Federation, K. R. & Lynne, D. in Climate Change 2013: The Physical Science Basis (eds Stocker, T. F. et al.) 255–316 (IPCC, Cambridge Univ. Press, 2013).

  13. 13.

    Gregory, J. M. et al. A model intercomparison of changes in the Atlantic thermohaline circulation in response to increasing atmospheric CO2 concentration. Geophys. Res. Lett. 32, 1–5 (2005).

  14. 14.

    Sévellec, F., Fedorov, A. V. & Liu, W. Arctic sea-ice decline weakens the Atlantic Meridional Overturning Circulation. Nat. Clim. Change 7, 604–610 (2017).

  15. 15.

    Weaver, A. J. et al. Stability of the Atlantic Meridional Overturning Circulation: a model intercomparison. Geophys. Res. Lett. 39, 1–8 (2012).

  16. 16.

    Yang, H., Wang, Y. & Liu, Z. A modelling study of the Bjerknes compensation in the meridional heat transport in a freshening ocean. Tellus A 65, 1–8 (2013).

  17. 17.

    Yang, Q. et al. Understanding Bjerknes compensation in meridional heat transports and the role of freshwater in a warming climate. J. Clim. 31, 4791–4806 (2018).

  18. 18.

    Kang, S. M., Held, I. M., Frierson, D. M. W. & Zhao, M. The response of the ITCZ to extratropical thermal forcing: idealized slab-ocean experiments with a GCM. J. Clim. 21, 3521–3532 (2008).

  19. 19.

    Gent, P. R. et al. The Community Climate System Model version 4. J. Clim. 24, 4973–4991 (2011).

  20. 20.

    Kay, J. E. et al. The Community Earth System Model (CESM) Large Ensemble project: a community resource for studying climate change in the presence of internal climate variability. Bull. Am. Meteorol. Soc. 96, 1333–1349 (2015).

  21. 21.

    Taylor, K. E., Stouffer, R. J. & Meehl, G. A. An overview of CMIP5 and the experiment design. Bull. Am. Meteorol. Soc. 93, 485–498 (2012).

  22. 22.

    Lu, J. & Cai, M. Quantifying contributions to polar warming amplification in an idealized coupled general circulation model. Clim. Dynam. 34, 669–687 (2010).

  23. 23.

    Shaw, T. A. et al. Storm track processes and the opposing influences of climate change. Nat. Geosci. 9, 656–664 (2016).

  24. 24.

    Chang, E. K. M., Guo, Y. & Xia, X. CMIP5 multimodel ensemble projection of storm track change under global warming. J. Geophys. Res. Atmos. 117, 1–19 (2012).

  25. 25.

    Vecchi, G. A. et al. Weakening of tropical Pacific atmospheric circulation due to anthropogenic forcing. Nature 441, 73–76 (2006).

  26. 26.

    Liu, Z., Philander, S. G. H. & Pacanowski, R. C. A GCM study of tropical–subtropical upper-ocean water exchange. J. Phys. Oceanogr. 24, 2606–2623 (1994).

  27. 27.

    Held, I. M. The partitioning of the poleward energy transport between the tropical ocean and atmosphere. J. Atmos. Sci. 58, 943–948 (2001).

  28. 28.

    Back, L. et al. Global hydrological cycle response to rapid and slow global warming. J. Clim. 26, 8781–8786 (2013).

  29. 29.

    Armour, K. C., Marshall, J., Scott, J. R., Donohoe, A. & Newsom, E. R. Southern Ocean warming delayed by circumpolar upwelling and equatorward transport. Nat. Geosci. 9, 549–554 (2016).

  30. 30.

    Liu, W., Lu, J., Xie, S.-P. & Fedorov, A. Southern Ocean heat uptake, redistribution and storage in a warming climate: the role of meridional overturning circulation. J. Clim. 31, 4727–4743 (2018).

  31. 31.

    Levitus, S. et al. World ocean heat content and thermosteric sea level change (0–2000m), 1955–2010. Geophys. Res. Lett. 39, 1–5 (2012).

  32. 32.

    Roemmich, D. et al. Unabated planetary warming and its ocean structure since 2006. Nat. Clim. Change 5, 240–245 (2015).

  33. 33.

    Liu, Z., Yang, H., He, C. & Zhao, Y. A theory for Bjerknes compensation: the role of climate feedback. J. Clim. 29, 191–208 (2016).

  34. 34.

    Green, B. & Marshall, J. Coupling of trade winds with ocean circulation damps ITCZ shifts. J. Clim. 30, 4395–4411 (2017).

  35. 35.

    Jansen, M. F., Nadeau, L. P. & Merlis, T. M. Transient versus equilibrium response of the ocean’s overturning circulation to warming. J. Clim. 31, 5147–5163 (2018).

  36. 36.

    Huang, B. et al. Extended Reconstructed Sea Surface Temperature, version 5 (ERSSTv5): upgrades, validations, and intercomparisons. J. Clim. 30, 8179–8205 (2017).

  37. 37.

    Kalnay, E. et al. The NCEP/NCAR 40-year reanalysis project. Bull. Am. Meteorol. Soc. 77, 437–471 (1996).

  38. 38.

    Gent, P. R. & Mcwilliams, J. C. Isopycnal mixing in ocean circulation models. J. Phys. Oceanogr. 20, 150–155 (1990).

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Acknowledgements

This work is supported by MOST 2017YFA0603801, NSFC41630527, NSF1656907, NSF1810682 and the Nanjing University of Information Science and Technology. We thank Q. Li and J. Han for a discussion on meridional heat transport calculation in CCSM4, and L. Franchisteguy, A. Voldoire and H. Haak for discussions on meridional heat transport calculations in CMIP5 models. We acknowledge the climate modelling groups for producing model outputs, the Program for Climate Model Diagnosis and Intercomparison for maintaining the CMIP5 data archive from which we drew the data, and the CESM community for providing the CESM-LE product. We also acknowledge the high-performance computing support from NCAR’s Computational and Information Systems Laboratory, sponsored by the National Science Foundation. Portions of this study are supported by the Regional and Global Model Analysis component of the Earth and Environmental System Modeling programme of the US Department of Energy’s Office of Biological and Environmental Research Cooperative Agreement number DE-FC02-97ER62402, and the National Science Foundation. This research also uses resources of the National Energy Research Scientific Computing Center supported by the Office of Science of the US Department of Energy under contract number DE-AC02-05CH11231. Finally, this work could not have been completed without xcesm—a decent Python package (https://github.com/Yefee/xcesm) based on Xarray (http://xarray.pydata.org/en/stable/) for CESM output diagnosis.

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Affiliations

  1. College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, China

    • Chengfei He
  2. Atmospheric Science Program, Department of Geography, Ohio State University, Columbus, OH, USA

    • Chengfei He
    •  & Zhengyu Liu
  3. Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, USA

    • Chengfei He
  4. Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, USA

    • Aixue Hu

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Contributions

C.H. and Z.L designed the study. C.H. performed the analysis. A.H. provided CESM simulation data. Z.L. and C.H. wrote the manuscript with input from A.H.

Competing interests

The authors declare no competing interests.

Corresponding authors

Correspondence to Chengfei He or Zhengyu Liu.

Supplementary information

  1. Supplementary Information

    Supplementary Table 1, Supplementary Figures 1–8, Supplementary References

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DOI

https://doi.org/10.1038/s41558-018-0387-3