The Creation Wiki is made available by the NW Creation Network
Watch monthly live webcast - Like us on Facebook - Subscribe on YouTube

Milankovitch cycles

From CreationWiki, the encyclopedia of creation science
Jump to: navigation, search
Theoretical Milankovitch Variations

The Milankovitch cycle is the theoretical effect of changes in the Earth's movements upon its climate. The theory states that the eccentricity in the Earth's orbit, axial tilt, and precession of the Earth's orbit produce 100,000 year ice age cycles in Earth's climate. Despite the claims of evolutionists this theory does not work.

If the Earth were more than a few thousand years old, changes would occur in the eccentricity, obliquity, and precession of Earth's movements due to the various forces acting on the Earth . These changes in movement and orientation would affect the amount and location of solar radiation reaching the Earth. This effect is called solar forcing. There are problems when it comes to reconciling the theory of Milankovitch cycles with reality, even if one assumes uniformitarian interpretations of the data.

The variations in eccentricity would have a much smaller effect than precession or obliquity and should produce the weakest effects. However, observations show the strongest variation in the 100,000 year cycle according to uniformitarian dating methods. Furthermore, as the above chart shows, the actual pattern is not as good as the theory suggests, as the peaks are at best an imperfect match. Furthermore a strong 400,000 year cycle in the eccentricity variations is detected in the climate data. There is also a causality problem in that the alleged climate effects sometimes seem to occur as much as 10,000 years before the solar forcing that is alleged to be causing them.

The simple fact is, that the predicted variations in the Earth's movements are not large enough to cause the change in climate they are alleged to cause. If the Earth were more than a few thousand years old, the variations would probably occur, but they cannot produce the predicted change in climate. However, immediately following the Genesis Flood there would be large and rapid climate fluctuations. Uniformitarian geologists interpret this climate data as occurring over 100's of thousands of years, but Flood geology would interpret it as occurring within 1,000 years of the Flood.

The Milankovitch cycle and laminated sediments

Laminated sediments are found all over the world, from England to India, from America to Japan. Many claim that the sequences of these sediments follow a pattern of thickness. One such pattern of carbonate cycles can be found in the Middle Triassic Latemar platform. More often than not, this type of phenomenon is explained by the Milankovitch cycle of about 20,000 years. The counted amount of such cycles at this site is 598, thus hinting a total time of 12 million years.

However, fossils and radiometric dating indicates a age around of 4.7 million years, far from 12 million years. This shows that the Milankovitch cycle is insufficient in explaining geological data. ( Brack P, Mundil R, Oberli F, Meier M, Rieber H. 371-375)

Outdated Data

Uniformitarian oceanographer Wolfgang Berger notes: "The agreement of dating by [basalt layers at the Brunhes-Matuyama boundary] and by Milankovitch tuning (urged by Shackleton et al. 1990) is the strongest argument yet for the correctness of Milankovitch theory."[1] However, the original Pacemaker paper used 1973 age estimates from a paper by Nicholas Shackleton and Neil Opdyke,[2] which assumed the most recent reversal of the Earth's magnetic field (Brunhes-Matuyama; B-M) occurred 700 thousand years ago, as obtained from potassium-argon dating. However, six years later, in 1979, uniformitarians revised the date to 730 thousand years ago.[3] The date was later revised again, based on orbitally tuned chemical wiggles in the Galápagos deep-sea core, to 780 thousand years.[4] Both ages cannot be true. When redone with the new estimates, the theory is no longer proven.[5][6]

References

  1. Berger, W. H. 2014. On the Beginnings of Palaeoceanography: Foraminifera, Pioneers, and the Albatross Expedition. In Landmarks in Foraminiferal Micropalaeontology: History and Development. A. J. Bowden, F. J. Gregory, and A.S. Henderson, eds. London: Geological Society Publishing House: 169.
  2. Shackleton, N.J. and N. D. Opdyke. 1973. Oxygen Isotope and Palaeomagnetic Stratigraphy of Equatorial Pacific Core V28-238: Oxygen Isotope Temperatures and Ice Volumes on a 10[to the fifth power] Year and 10[to the sixth power] Scale. Quaternary Research. 3 (1): 39-55
  3. Mankinen, E. A. and G. B. Dalrymple. 1979. Revised Geomagnetic Polarity Time Scale for the Interval 0-5 m.y. B.P. Journal of Geophysical Research: Solid Earth. 84 (B2): 615-626
  4. Spell, T.L. and I. McDougall. 1992. Revisions to the age of the Brunhes-Matuyama Boundary and the Pleistocene geomagnetic polarity timescale. Geophysical Research Letters. 19 (12): 1181-1184
  5. Hebert, J. 2016. Milankovitch Meltdown, Part 2. Acts & Facts. 45 (12): 10-13.
  6. All sources are as quoted from Hebert, J. January, 2017. Milankovitch Meltdown, Part 3. Acts & Facts. pp. 10-13

See Also