23 Sep 2005
23 Sep 2005
Orbital forcings of the Earth’s climate in wavelet domain
- 1Institute for Applied Mathematics, Department of Computational Mathematics, Odessa, Ukraine
- 2Innovative Geosciences Research Centre, Department of Hydrometeorology, Odessa, Ukraine
- 3Odessa National Polytechnic University, Department of Theoretical Physics, Odessa, Ukraine
- 4Kiev National University, Department of Antarctic Sciences, Kiev, Ukraine
- 1Institute for Applied Mathematics, Department of Computational Mathematics, Odessa, Ukraine
- 2Innovative Geosciences Research Centre, Department of Hydrometeorology, Odessa, Ukraine
- 3Odessa National Polytechnic University, Department of Theoretical Physics, Odessa, Ukraine
- 4Kiev National University, Department of Antarctic Sciences, Kiev, Ukraine
Abstract. We examine two paleoclimate proxy records – the temperature differences from the Antarctic Vostok ice core and the composite δ18O record from three sites (V19-30, ODP 677, and ODP 846) – in order to search for indications of orbital forcings. We demonstrate that the non-decimated wavelet transform is an appropriate tool for investigating temporarily changing spectral properties of records. Our results indicate that abrupt climate warmings with cyclicity of ~100 kiloyears during the last 400 kiloyears were caused by the combined unidirectional influences of three orbital parameters and the eccentricity can be considered as a modulator defining transitions from the Ice Ages to the periods of comparative warmings. Non-decimated wavelet transform avails discovering the possible part played in climate change by the eccentricity-forced variations. Up to approximately 1.7 million years BP, the influence of this variations of eccentricity appears in increasing for almost all local maxima of δ18O. Since the ~1.7 million years BP, minor and significant maxima alternated and this not affected as much the variations of δ18O.
A. V. Glushkov et al.


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RC S57: 'Orbital forcings of the Earths climate', Anonymous Referee #1, 29 Sep 2005
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RC S100: 'Comment on Glushkov et al.', Anonymous Referee #2, 26 Oct 2005
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RC S127: 'Comment on: Orbital forcings of the...', Annette Witt, 24 Nov 2005
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EC S138: 'editor synthesis', Joel Guiot, 28 Nov 2005
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AC S146: 'Author Comment for all referees', Valery Khokhlov, 16 Dec 2005
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EC S159: 'general comment on version 2', Joel Guiot, 08 Jan 2006


-
RC S57: 'Orbital forcings of the Earths climate', Anonymous Referee #1, 29 Sep 2005
-
RC S100: 'Comment on Glushkov et al.', Anonymous Referee #2, 26 Oct 2005
-
RC S127: 'Comment on: Orbital forcings of the...', Annette Witt, 24 Nov 2005
-
EC S138: 'editor synthesis', Joel Guiot, 28 Nov 2005
-
AC S146: 'Author Comment for all referees', Valery Khokhlov, 16 Dec 2005
-
EC S159: 'general comment on version 2', Joel Guiot, 08 Jan 2006
A. V. Glushkov et al.
A. V. Glushkov et al.
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