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Over 90% of the thermal energy that has accumulated on Earth from global heating since 1970 is stored in the ocean.[1]

In oceanography and climatology, ocean heat content (OHC) is a term for the energy absorbed by the ocean, where it is stored for indefinite time periods as internal energy or enthalpy. The rise in OHC accounts for over 90% of Earth’s excess thermal energy from global heating between 1971 and 2018.[1][2] It is extremely likely that anthropogenic forcing via rising greenhouse gas emissions was the main driver of this OHC increase.[3]: 1228  About one third of the added energy has propagated to depths below 700 meters as of 2020.[4][5] As the vast majority (>90%) of the extra heat from increasing greenhouse gases is absorbed by the oceans, “global warming” is, in fact, mostly “ocean warming,” which makes ocean heat content and sea level rise the most vital indicators of climate change.[6]

Ocean waters are efficient absorbents of solar energy and have far greater heat capacity than atmospheric gases.[4] The top few meters of the ocean consequently contain more thermal energy than Earth's entire atmosphere.[7] Research vessels and stations have sampled sea surface temperatures and temperatures at greater depth and around the globe since before 1960. Additionally after year 2000, an expanding network of nearly 4000 Argo robotic floats has measured the temperature anomaly, or equivalently the change in OHC. Since at least 1990, OHC has increased at a steady or accelerating rate.[1][8] The rate of change for the 2003-2018 period reached +0.58±0.08 W/m2, with uncertainty mainly due to the challenges of making multidecadal measurements with sufficient accuracy and spatial coverage.[6]

Changes in ocean heat content have far-reaching consequences for the planet's marine and terrestrial ecosystems; including multiple impacts to coastal ecosystems and communities. Effects include variations in sea level and polar ice sheets, climate change and shifts in extreme weather phenomena, and the migration and extinction of biological species.[9][10]

Background

The more abundant equatorial solar irradiance which is absorbed by Earth's tropical surface waters drives the overall poleward propagation of ocean heat. The surface also exchanges energy with the lower troposphere, and thus responds to long-term changes in cloud albedo, greenhouse gases, and other factors in the Earth's energy budget.[4] Over time, a sustained imbalance in the budget enables a net flow of heat either into or out of ocean depth via thermal conduction, downwelling, and upwelling.[11][12]

Diagram showing some of the effects of climate change on oceans [13]

Oceans are Earth's largest thermal reservoir that function to regulate the planet's climate; acting as both a sink and a source of energy.[14] Releases of OHC to the atmosphere occur primarily via evaporation and enable the planetary water cycle.[15] Concentrated releases in association with high sea surface temperatures help drive tropical cyclones, atmospheric rivers, atmospheric heat waves and other extreme weather events that can penetrate far inland.[16][17]

The ocean also functions as a sink and source of carbon, with a role comparable to that of land regions in Earth's carbon cycle.[18][19] In accordance with the temperature dependence of Henry's law, warming surface waters are less able to absorb atmospheric gases including the growing emissions of carbon dioxide and other greenhouse gases from human activity.[20][21] Warming of the deep ocean has the further potential to melt and release some of the vast store of frozen methane hydrate deposits that have naturally accumulated there.[22] Deep-ocean warming below 2000 m has been largest in the Southern Ocean compared to other ocean basins.[3]: 1230 

Warming oceans are responsible for coral bleaching[23] and contribute to the migration of marine species.[24] Marine heat waves are regions of life-threatening and persistently elevated water temperatures.[25] Redistribution of the planet's internal energy by atmospheric circulation and ocean currents produces internal climate variability, often in the form of irregular oscillations,[26] and helps to sustain the global thermohaline circulation.[27][28]

The increase in OHC accounts for 30–40% of global sea-level rise from 1900 to 2020 because of thermal expansion.[29][30] It is also an accelerator of sea ice, iceberg, and tidewater glacier melting. The loss of ice lowers planetary albedo and causes more heat to influx into the Earth's atmosphere, resulting in the inability to maintain the global heat balance. [31] The resulting ice retreat has been rapid and widespread for Arctic sea ice,[32] and within northern fjords such as those of Greenland and Canada.[33] Impacts to Antarctic sea ice and the vast Antarctic ice shelves which terminate into the Southern Ocean have varied by region and are also increasing due to warming waters.[34][35] Breakup of the Thwaites Ice Shelf and its West Antarctica neighbors contributed about 10% of sea-level rise in 2020.[36][37]

Definition

Graph of different thermoclines (depth versus ocean temperature) based on seasons and latitude

The areal density of ocean heat content between two depths is defined as a definite integral:[38][39]

where is the specific heat capacity of sea water, h2 is the lower depth, h1 is the upper depth, is the seawater density profile, and is the temperature profile. In SI units, has units of Joules per square metre (J·m−2).

In practice, the integral can be approximated by summation of a smooth and otherwise well-behaved sequence of temperature and density data. Seawater density is a function of temperature, salinity, and pressure. Despite the cold and great pressure at ocean depth, water is nearly incompressible and favors the liquid state for which its density is maximized.

Measurements of temperature versus ocean depth generally show an upper mixed layer (0–200 m), a thermocline (200–1500 m), and a deep ocean layer (>1500 m). These boundary depths are only rough approximations. Sunlight penetrates to a maximum depth of about 200 m; the top 80 m of which is the habitable zone for photosynthetic marine life covering over 70% of Earth's surface.[40] Wave action and other surface turbulence help to equalize temperatures throughout the upper layer.

Global Heat Content in the top 2000 meters of the ocean since 1958[41]

Unlike surface temperatures which decrease with latitude, deep-ocean temperatures are relatively cold and uniform in most regions of the world.[42] About 50% of all ocean volume is at depths below 3000 m (1.85 miles), with the Pacific Ocean being the largest and deepest of five oceanic divisions. The thermocline is the transition between upper and deep layers in terms of temperature, nutrient flows, abundance of life, and other properties. It is semi-permanent in the tropics, variable in temperate regions (often deepest during the summer), and shallow to nonexistent in polar regions.[43]

Integrating the areal density of ocean heat over an ocean basin, or entire ocean, gives the total heat content, as indicated in the figure at left. Thus, total ocean heat content is a volume integral of the product of temperature, density, and heat capacity over the three-dimensional region of the ocean for which data is available. The bulk of measurements have been performed at depths shallower than about 2000 m (1.25 miles).[16]

Measurement networks

The global distribution of active floats in the Argo array[44]
See also: Ocean temperature and Sea surface temperature

Estimation of the rates of change in OHC has been subject to uncertainties because of the challenges of making multidecadal measurements with sufficient accuracy and spatial coverage.[6] For instance, there are significant interannual fluctuations due to El Niño–Southern Oscillation (ENSO) and other natural climate modes, such as the Indian Ocean dipole, with typical periods of less than 10 years. Major volcanic eruptions induce additional interannual OHC fluctuations.[6]

Ocean heat content can be estimated using measurements obtained by a Nansen bottle, bathythermograph, CTD, or ocean acoustic tomography.[45] Sea surface temperatures are also measured by collections of moored and drifting buoys, such as those deployed by the Global Drifter Program and the National Data Buoy Center. The World Ocean Database Project is the largest database for temperature profiles from all of the world’s ocean.[46]

Argo is an international program of robotic profiling floats deployed globally since the start of the 21st century.[47] The program's initial 3000 units had expanded to nearly 4000 units by year 2020. At the start of each 10-day measurement cycle, a float descends to a depth of 1000 meters and drifts with the current there for nine days. It then descends to 2000 meters and measures temperature, salinity (conductivity), and depth (pressure) over a final day of ascent to the surface. At the surface the float transmits the depth profile and horizontal position data through satellite relays before repeating the cycle.[48]

A smaller test fleet of "deep Argo" floats aims to extend the measurement capability down to about 6000 meters. It will accurately sample OHC parameters for a majority of the ocean volume when fully deployed.[49][50]

Recent observations and changes

Map of the ocean heat anomaly in the upper 700 meters for year 2020 versus the 1993–2020 average.[51] Some regions accumulated more energy than others due to transport drivers such as winds and currents.
Oceanographer Josh Willis discusses the heat capacity of water, performs an experiment to demonstrate heat capacity using a water balloon and describes how water's ability to store heat affects Earth's climate.

Numerous independent studies in recent years have found a multi-decadal rise in OHC of upper ocean regions that has begun to penetrate to deeper regions.[1][52] The upper ocean (0–700 m) has warmed since 1971, while it is very likely that warming has occurred at intermediate depths (700–2000 m) and likely that deep ocean (below 2000 m) temperatures have increased.[3]: 1228  The heat uptake results from a persistent warming imbalance in Earth's energy budget that is most fundamentally caused by the anthropogenic increase in atmospheric greenhouse gases.[9][53]: 41  There is very high confidence that increased ocean heat content in response to anthropogenic carbon dioxide emissions is essentially irreversible on human time scales.[3]: 1233 

Studies based on ARGO indicate that ocean surface winds, especially the subtropical trade winds in the Pacific Ocean, change ocean heat vertical distribution.[54] This results in changes among ocean currents, and an increase of the subtropical overturning, which is also related to the El Niño and La Niña phenomenon. Depending on stochastic natural variability fluctuations, during La Niña years around 30% more heat from the upper ocean layer is transported into the deeper ocean.

Model studies indicate that ocean currents transport more heat into deeper layers during La Niña years, following changes in wind circulation.[55][56] Years with increased ocean heat uptake have been associated with negative phases of the interdecadal Pacific oscillation (IPO).[57] This is of particular interest to climate scientists who use the data to estimate the ocean heat uptake.

A study in 2015 concluded that ocean heat content increases by the Pacific Ocean were compensated by an abrupt distribution of OHC into the Indian Ocean.[58]

The upper ocean heat content in most North Atlantic regions is dominated by heat transport convergence (a location where ocean currents meet), without large changes to temperature and salinity relation.[59]

Although the upper 2000 m of the oceans have experienced warming on average since the 1970s, the rate of ocean warming varies regionally with the subpolar North Atlantic warming more slowly and the Southern Ocean taking up a disproportionate large amount of heat due to anthropogenic greenhouse gas emissions.[3]: 1230 

See also

References

  1. ^ a b c d von Schuckman, K.; Cheng, L.; Palmer, M. D.; Hansen, J.; et al. (7 September 2020). "Heat stored in the Earth system: where does the energy go?". Earth System Science Data. 12 (3): 2013-2041. Bibcode:2020ESSD...12.2013V. doi:10.5194/essd-12-2013-2020.
  2. ^ Cheng, Lijing; Abraham, John; Trenberth, Kevin; Fasullo, John; Boyer, Tim; Locarnini, Ricardo; et al. (2021). "Upper Ocean Temperatures Hit Record High in 2020". Advances in Atmospheric Sciences. 38 (4): 523–530. Bibcode:2021AdAtS..38..523C. doi:10.1007/s00376-021-0447-x. S2CID 231672261.
  3. ^ a b c d e Fox-Kemper, B., H.T. Hewitt, C. Xiao, G. Aðalgeirsdóttir, S.S. Drijfhout, T.L. Edwards, N.R. Golledge, M. Hemer, R.E. Kopp, G.  Krinner, A. Mix, D. Notz, S. Nowicki, I.S. Nurhati, L. Ruiz, J.-B. Sallée, A.B.A. Slangen, and Y. Yu, 2021: Chapter 9: Ocean, Cryosphere and Sea Level Change. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L.  Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 1211–1362.
  4. ^ a b c LuAnn Dahlman and Rebecca Lindsey (2020-08-17). "Climate Change: Ocean Heat Content". National Oceanic and Atmospheric Administration.
  5. ^ "Study: Deep Ocean Waters Trapping Vast Store of Heat". Climate Central. 2016.
  6. ^ a b c d Cheng, Lijing; Foster, Grant; Hausfather, Zeke; Trenberth, Kevin E.; Abraham, John (2022). "Improved Quantification of the Rate of Ocean Warming". Journal of Climate. 35 (14): 4827–4840. Bibcode:2022JCli...35.4827C. doi:10.1175/JCLI-D-21-0895.1. Text was copied from this source, which is available under a Creative Commons Attribution 4.0 International License
  7. ^ "Vital Signs of the Plant: Ocean Heat Content". NASA. Retrieved 2021-11-15.
  8. ^ Abraham, J. P.; Baringer, M.; Bindoff, N. L.; Boyer, T.; et al. (2013). "A review of global ocean temperature observations: Implications for ocean heat content estimates and climate change". Reviews of Geophysics. 51 (3): 450–483. Bibcode:2013RvGeo..51..450A. CiteSeerX 10.1.1.594.3698. doi:10.1002/rog.20022. hdl:11336/25416. S2CID 53350907.
  9. ^ a b "Summary for Policymakers, Assessment Report 5, Working Group I" (PDF). www.climatechange2013.org. Intergovernmental Panel on Climate Change. 2013. Retrieved 15 July 2016.
  10. ^ "Ocean warming : causes, scale, effects and consequences. And why it should matter to everyone. Executive summary" (PDF). International Union for Conservation of Nature. 2016.
  11. ^ "Air-Sea interaction: Teacher's guide". American Meteorological Society. 2012. Retrieved 2022-02-22.
  12. ^ "Ocean Motion : Definition : Wind Driven Surface Currents - Upwelling and Downwelling". Retrieved 2022-02-22.
  13. ^ Käse, Laura; Geuer, Jana K. (2018). "Phytoplankton Responses to Marine Climate Change – an Introduction". YOUMARES 8 – Oceans Across Boundaries: Learning from each other. pp. 55–71. doi:10.1007/978-3-319-93284-2_5. ISBN 978-3-319-93283-5. S2CID 134263396. Modified text was copied from this source, which is available under a Creative Commons Attribution 4.0 International License.
  14. ^ Michon Scott (2006-04-24). "Earth's Big Heat Bucket". NASA Earth Observatory.
  15. ^ "NASA Earth Science: Water Cycle". NASA. Retrieved 2021-10-27.
  16. ^ a b "OHC reaches its highest level in recorded history". National Centers for Environmental Information. 22 January 2020.
  17. ^ Laura Snider (2021-01-13). "2020 was a record-breaking year for ocean heat - Warmer ocean waters contribute to sea level rise and strengthen storms". National Center for Atmospheric Research.
  18. ^ Friedlingstein, M., O'Sullivan, M., M., Jones, Andrew, R., Hauck, J., Olson, A., Peters, G., Peters, W., Pongratz, J., Sitch, S., Le Quéré, C. and 75 others (2020). "Global carbon budget 2020". Earth System Science Data. 12 (4): 3269–3340. Bibcode:2020ESSD...12.3269F. doi:10.5194/essd-12-3269-2020.{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)
  19. ^ Riebeek, Holli (16 June 2011). "The Carbon Cycle". Earth Observatory. NASA. Archived from the original on 5 March 2016. Retrieved 26 February 2022.
  20. ^ Woolf D. K., Land P. E., Shutler J. D., Goddijn-Murphy L.M., Donlon, C. J. (2016). "On the calculation of air-sea fluxes of CO2 in the presence of temperature and salinity gradients". Journal of Geophysical Research: Oceans. 121 (2): 1229–1248. Bibcode:2016JGRC..121.1229W. doi:10.1002/2015JC011427.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  21. ^ Riebeek, Holli (1 July 2008). "The Ocean's Carbon Cycle". Earth Observatory. NASA. Retrieved 26 February 2022.
  22. ^ Adam Voiland and Joshua Stevens (8 March 2016). "Methane Matters". NASA Earth Observatory. Retrieved 26 February 2022.
  23. ^ "The Great Barrier Reef: a catastrophe laid bare". The Guardian. 6 June 2016.
  24. ^ Poloczanska, Elivra S.; Brown, Christopher J.; Sydeman, William J.; Kiessling, Wolfgang; Schoeman, David S.; Moore, Pippa J.; et al. (2013). "Global imprint of climate change on marine life". Nature Climate Change. 3 (10): 919–925. Bibcode:2013NatCC...3..919P. doi:10.1038/nclimate1958.
  25. ^ "So what are marine heat waves? - A NOAA scientist explains". National Oceanic and Atmospheric Administration. 2019-10-08.
  26. ^ "El Niño & Other Oscillations". Woods Hole Oceanographic Institution. Retrieved 2021-10-08.
  27. ^ Rahmstorf, Stefan (2003). "The concept of the thermohaline circulation". Nature. 421 (6924): 699. Bibcode:2003Natur.421..699R. doi:10.1038/421699a. PMID 12610602. S2CID 4414604.
  28. ^ Rahmstorf, Stefan; Box, Jason E.; Feulner, George; Mann, Michael E.; Robinson, Alexander; Rutherford, Scott; Schaffernicht, Erik J. (2015). "Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation" (PDF). Nature Climate Change. 5 (5): 475–480. Bibcode:2015NatCC...5..475R. doi:10.1038/nclimate2554.
  29. ^ Frederikse, Thomas; Landerer, Felix; Caron, Lambert; Adhikari, Surendra; Parkes, David; Humphrey, Vincent W.; et al. (2020). "The causes of sea-level rise since 1900". Nature. 584 (7821): 393–397. doi:10.1038/s41586-020-2591-3. PMID 32814886. S2CID 221182575.
  30. ^ "NASA-led study reveals the causes of sea level rise since 1900". NASA. 2020-08-21.
  31. ^ Garcia-Soto, Carlos (2022-10-20). "An Overview of Ocean Climate Change Indicators: Sea Surface Temperature, Ocean Heat Content, Ocean pH, Dissolved Oxygen Concentration, Arctic Sea Ice Extent, Thickness and Volume, Sea Level and Strength of the AMOC (Atlantic Meridional Overturning Circulation)". Frontiers in Marine Science. 8. doi:10.3389/fmars.2021.642372.
  32. ^ Rebecca Lindsey and Michon Scott (2021-09-21). "Climate Change: Arctic sea ice". National Oceanographic and Atmospheric Administration.
  33. ^ Maria-Jose Viñas and Carol Rasmussen (2015-08-05). "Warming seas and melting ice sheets". NASA.
  34. ^ Slater, Thomas; Lawrence, Isobel R.; Otosaka, Inès N.; Shepherd, Andrew; et al. (25 January 2021). "Review article: Earth's ice imbalance". The Cryosphere. 15 (1): 233–246. Bibcode:2021TCry...15..233S. doi:10.5194/tc-15-233-2021.
  35. ^ Michon Scott (2021-03-26). "Understanding climate: Antarctic sea ice extent". National Oceanographic and Atmospheric Administration.
  36. ^ Carly Cassella (2021-04-11). "Warm Water Under The 'Doomsday Glacier' Threatens to Melt It Faster Than We Predicted". sciencealert.com.
  37. ^ British Antarctic Survey (2021-12-15). "The threat from Thwaites: The retreat of Antarctica's riskiest glacier". phys.org.
  38. ^ Dijkstra, Henk A. (2008). Dynamical oceanography ([Corr. 2nd print.] ed.). Berlin: Springer Verlag. p. 276. ISBN 9783540763758.
  39. ^ Kumar, M. Suresh; Kumar, A. Senthil; Ali, MM (10 December 2014). "Computation of Ocean Heat Content" (PDF). Technical Report NRSC-SDAPSA-G&SPG-DEC-2014-TR-672. National Remote Sensing Centre (ISRO), Government of India.
  40. ^ "photic zone (oceanography)". Encyclopædia Britannica Online. Retrieved 2021-12-15.
  41. ^ "Global Ocean Heat and Salt Content: Seasonal, Yearly, and Pentadal Fields". NOAA. Retrieved 2022-02-26.
  42. ^ MarineBio (2018-06-17). "The Deep Sea". MarineBio Conservation Society. Retrieved 2020-08-07.
  43. ^ "What is a thermocline?". National Oceanographic and Atmospheric Administration. Retrieved 2021-12-23.
  44. ^ "About Argo". Argo: part of the integrated global observation strategy. University of California, San Diego. Retrieved 15 December 2021.
  45. ^ Cheng L. J., Zhu J. (2014). "Artifacts in variations of ocean heat content induced by the observation system changes". Geophysical Research Letters. 41 (20): 7276–7283. Bibcode:2014GeoRL..41.7276C. doi:10.1002/2014GL061881.
  46. ^ "World Ocean Database Profiles the Ocean". National Centers for Environmental Information. 14 June 2017.
  47. ^ Toni Feder (2000). "Argo Begins Systematic Global Probing of the Upper Oceans". Physics Today. 53 (7): 50. Bibcode:2000PhT....53g..50F. doi:10.1063/1.1292477.
  48. ^ Dale C.S. Destin (5 December 2014). "The Argo revolution". climate.gov.
  49. ^ Administration, US Department of Commerce, National Oceanic and Atmospheric. "Deep Argo". oceantoday.noaa.gov. Retrieved 24 December 2021.{{cite web}}: CS1 maint: multiple names: authors list (link)
  50. ^ "Deep Argo: Diving for Answers in the Ocean's Abyss". www.climate.gov. 24 December 2021.
  51. ^ Jessica Blunden (25 August 2021). "Reporting on the State of the Climate in 2020". Climate.gov. National Oceanographic and Atmospheric Administration.
  52. ^ Abraham; et al. (2013). "A review of global ocean temperature observations: Implications for ocean heat content estimates and climate change". Reviews of Geophysics. 51 (3): 450–483. Bibcode:2013RvGeo..51..450A. CiteSeerX 10.1.1.594.3698. doi:10.1002/rog.20022. S2CID 53350907.
  53. ^ Arias, P.A., N. Bellouin, E. Coppola, R.G. Jones, G. Krinner, J. Marotzke, V. Naik, M.D. Palmer, G.-K. Plattner, J. Rogelj, M. Rojas, J. Sillmann, T. Storelvmo, P.W. Thorne, B. Trewin, K. Achuta Rao, B. Adhikary, R.P. Allan, K. Armour, G. Bala, R. Barimalala, S. Berger, J.G. Canadell, C. Cassou, A. Cherchi, W. Collins, W.D. Collins, S.L. Connors, S. Corti, F. Cruz, F.J. Dentener, C. Dereczynski, A. Di Luca, A. Diongue Niang, F.J. Doblas-Reyes, A. Dosio, H. Douville, F. Engelbrecht, V.  Eyring, E. Fischer, P. Forster, B. Fox-Kemper, J.S. Fuglestvedt, J.C. Fyfe, N.P. Gillett, L. Goldfarb, I. Gorodetskaya, J.M. Gutierrez, R. Hamdi, E. Hawkins, H.T. Hewitt, P. Hope, A.S. Islam, C. Jones, et al. 2021: Technical Summary. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 33−144.
  54. ^ Balmaseda, Trenberth & Källén (2013). "Distinctive climate signals in reanalysis of global ocean heat content". Geophysical Research Letters. 40 (9): 1754–1759. Bibcode:2013GeoRL..40.1754B. doi:10.1002/grl.50382. Essay Archived 2015-02-13 at the Wayback Machine
  55. ^ Meehl; et al. (2011). "Model-based evidence of deep-ocean heat uptake during surface-temperature hiatus periods". Nature Climate Change. 1 (7): 360–364. Bibcode:2011NatCC...1..360M. doi:10.1038/nclimate1229.
  56. ^ Rob Painting (2 October 2011). "The Deep Ocean Warms When Global Surface Temperatures Stall". SkepticalScience.com. Retrieved 15 July 2016.
  57. ^ Rob Painting (24 June 2013). "A Looming Climate Shift: Will Ocean Heat Come Back to Haunt us?". SkepticalScience.com. Retrieved 15 July 2016.
  58. ^ Lee, Sang-Ki; Park, Wonsun; Baringer, Molly O.; Gordon, Arnold L.; Huber, Bruce; Liu, Yanyun (June 2015). "Pacific origin of the abrupt increase in Indian Ocean heat content during the warming hiatus". Nature Geoscience. 8 (6): 445–449. Bibcode:2015NatGe...8..445L. doi:10.1038/ngeo2438. hdl:1834/9681.
  59. ^ "Heat content variability in the North Atlantic Ocean in ocean reanalyses". Geophys Res Lett. 42 (8): 2901–2909. 2015. Bibcode:2015GeoRL..42.2901H. doi:10.1002/2015GL063299. PMC 4681455. PMID 26709321. {{cite journal}}: Unknown parameter |authors= ignored (help)
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