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Changes in the Poleward Energy Flux by the Atmosphere and Ocean as a Possible Cause for Ice Ages

Published online by Cambridge University Press:  20 January 2017

Reginald E. Newell
Reginald E. Newell*
Affiliation:
Department of Meteorology, 54-1520, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
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Abstract

It is proposed that the two preferred modes of temperature and circulation of the atmosphere which occurred over the past 100,000 yr correspond to two modes of partitioning of the poleward energy flux between the atmosphere and ocean. At present the ocean carries an appreciable fraction of the transport, for example about three-eighths at 30°N. In the cold mode it is suggested that the ocean carries less, and the atmosphere more, than at present. During the formation of the ice, at 50,000 BP, for example, the overall flux is expected to be slightly lower than at present and during melting, at 16,000 BP, slightly higher. The transition between the modes is seen as a natural imbalance in the atmosphere-ocean energy budget with a gradual warming of the ocean during an Ice Age eventually cluminating in its termination. At the present the imbalance is thought to correspond to a natural cooling of the ocean, which will lead to the next Ice Age.

The magnitude of temperature changes in the polar regions differ between the hemispheres in the same way as present seasonal changes, being larger in the northern than in the southern hemisphere.

Overall the atmospheric energy cycle was more intense during the Ice Ages than now.

Observational tests are proposed by which predictions from the present arguments may be compared with deductions about the environment of the past.

Data used for the present state of the atmospheric general circulation are the latest global data available and contain no known major uncertainties. However, data for the oceanic circulation and energy budget are less well known for the present and almost unknown for the past. Hence the proposed imbalances must be treated as part of a speculative hypothesis, but one which eventually may be subject to observational test as no solar variability is invoked.

Type
Original Articles
Information
Quaternary Research , Volume 4 , Issue 2 , June 1974 , pp. 117 - 127
Copyright
University of Washington

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References

Bryan, K., (1962). Measurements of meridional heat transport by ocean currents. Journal of Geophysical Research 67, 3403–3416.CrossRefGoogle Scholar
Budyko, M.F., (1971). Data. Inadvertent Climate Modification; Report of the Study of Man's Impact on Climate. M.I.T. Press, Cambridge, Mass 124–129.Google Scholar
Coope, G.R., Morgan, A., Osborne, P.J., (1971). Fossil Coleoptera as indicators of climatic fluctuations during the last glaciation in Britain. Palaeogeography, Palaeoclimatology, and Palaeoecology 10, 87–101.Google Scholar
Defant, A., (1961). Physical Oceanography. Vol. 1, Pergamon Press, New York 93.Google Scholar
Flint, R.F., (1971). Glacial and Quaternary Geology. Wiley and Sons, Inc, New York 84.Google Scholar
Gill, A.E., (1973). Circulation and bottom water production in the Weddell Sea. Deep Sea Research 20, 111–140.Google Scholar
Green, J.S.A., (1970). Transfer properties of the large-scale eddies and the general circulation of the atmosphere. Quarterly Journal of the Royal Meteorological Society 96, 157–185.Google Scholar
Imbrie, J., van Donk, J., Kipp, N.G., (1973). Paleoclimatic Investigation of a Late Pleistocene Caribbean Deep-Sea Core: Comparison of Isotopic and Faunal Methods. Quaternary Research 3, 10–38.Google Scholar
Johnsen, S.J., Dansgaard, W., Clausen, H.B., Langway, C.C., (1972). Oxygen isotope profiles through the Antarctic and Greenland ice sheets. Nature (London) 235, 429–434.Google Scholar
Killworth, P.D., (1973). A two-dimensiona model for the formation of Antarctic Bottom Water. Deep Sea Research 20, 941–971.Google Scholar
Ku, T.L., Bischoff, J.L., Boersma, A., (1972). Age studies of Mid-Atlantic Ridge sediments near 42°N and 20°N. Deep-Sea Research 19, 233–247.Google Scholar
Lamb, H.H., Woodroffe, A., (1970). Atmospheric circulation during the last Ice Age. Quaternary Research 1, 29–58.CrossRefGoogle Scholar
McIntyre, A., Ruddiman, W.F., Jantzen, R., (1972). Southward penetrations of the North Atlantic Polar Front: faunal and floral evidence of large-scale surface water mass movements over the last 225,000 years. Deep-Sea Research 19, 61–77.Google Scholar
Newell, R.E., (1973). Climate and the Galapagos Islands. Nature (London) 245, 91–92.Google Scholar
Newell, R.E., Vincent, D.G., Dopplick, T.G., Ferruzza, D., Kidson, J.W., (1970). The energy balance of the global atmosphere. Corby, G.A., The Global Circulation of the Atmosphere Royal Meteorological Society, London 42–90.Google Scholar
Newell, R.E., Kidson, J.W., Vincent, D.G., Boer, G.J., (1972). The General Circulation of the Tropical Atmosphere. Vol. 1, M.I.T. Press, Cambridge, Mass 50–57.Google Scholar
Newell, R.E., Kidson, J.W., Vincent, D.G., Boer, G.J., (1973). The General Circulation of the Tropical Atmosphere. Vol. 2, M.I.T. Press, Cambridge, Mass(in press).Google Scholar
Oort, A.H., Rasmusson, E.M., (1971). Atmospheric Circulation Statistics. NOAA Professional Paper 5, U.S. Dept. of Commerce, Rockeville, Maryland 323.Google Scholar
Reid, J.L., (1971). General Circulation patterns in the World Ocean. Matthews, W.H., Smith, F.E., Goldberg, E.D., Man's Impact on Terrestrial and Oceanic Ecosystems M.I.T. Press, Cambridge, Mass 448–459.Google Scholar
Ruddiman, W.F., Tolderlund, D.S., Be, A.W.H., (1970). Foraminiferal evidence of a modern warming of the North Atlantic ocean. Deep-Sea Research 17, 141–155.Google Scholar
Saltzman, B., (1968). Steady state solutions for axially symmetric climatic variables. Pure and Applied Geophysics 69, 237–259.CrossRefGoogle Scholar
Stone, P.H., (1973). The effect of large-scale eddies on climatic change. Journal of the Atmospheric Sciences 30, 521–529.2.0.CO;2>CrossRefGoogle Scholar
Vowinckel, E., Orvig, S., (1970). The Climate of the North Polar Basin. Orvig, S., Climates of the Polar Regions Vol. 14, Elsevier Publishing Co, Amsterdam 220World Survey of Climatology.Google Scholar