Late Quaternary temperature variability described as abrupt transitions on a 1/<i>f</i> noise background
In order to have a scaling description of the climate system that is not inherently non-stationary, the rapid shifts between stadials and interstadials during the last glaciation (the Dansgaard-Oeschger events) cannot be included in the scaling law. The same is true for the shifts between the glacia...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-03-01
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| Series: | Earth System Dynamics |
| Online Access: | http://www.earth-syst-dynam.net/7/281/2016/esd-7-281-2016.pdf |
| Summary: | In order to have a scaling description of the climate system that is not
inherently non-stationary, the rapid shifts between stadials and
interstadials during the last glaciation (the Dansgaard-Oeschger events)
cannot be included in the scaling law. The same is true for the shifts
between the glacial and interglacial states in the Quaternary climate. When
these events are omitted from a scaling analysis the climate noise is
consistent with a 1/<i>f</i> law on timescales from months to 10<sup>5</sup> years. If
the shift events are included, the effect is a break in the scaling with an
apparent 1/<i>f</i><sup><i>β</i></sup> law, with <i>β</i> > 1, for the low frequencies. No
evidence of multifractal intermittency has been found in any of the
temperature records investigated, and the events are not a natural
consequence of multifractal scaling. |
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| ISSN: | 2190-4979 2190-4987 |