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Journal ArticleDOI

Extended orbitally forced palaeoclimatic records from the equatorial Atlantic Ceara Rise

TL;DR: In this article, the Oligocene-Miocene proxy records from Ocean Drilling Program (ODP) Leg 154 were used to evaluate how the interaction of long, multi-million year beats in the Earth's eccentricity and obliquity are implicated in the waxing and waning of ice-sheets, presumably on Antarctica.
About: This article is published in Quaternary Science Reviews.The article was published on 2006-12-01 and is currently open access. It has received 121 citations till now. The article focuses on the topics: Milankovitch cycles.
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Book ChapterDOI
01 Jan 2012
TL;DR: An Astronomically Tuned Neogene Time Scale (ATNTS2012) is presented in this article, as an update of ATNTS2004 in GTS2004, and the numerical ages are identical or almost so.
Abstract: An Astronomically Tuned Neogene Time Scale (ATNTS2012) is presented, as an update of ATNTS2004 in GTS2004. The new scale is not fundamentally different from its predecessor and the numerical ages are identical or almost so. Astronomical tuning has in principle the potential of generating a stable Neogene time scale as a function of the accuracy of the La2004 astronomical solution used for both scales. Minor problems remain in the tuning of the Lower Miocene. In GTS2012 we will summarize what has been modified or added since the publication of ATNTS2004 for incorporation in its successor, ATNTS2012. Mammal biostratigraphy and its chronology are elaborated, and the regional Neogene stages of the Paratethys and New Zealand are briefy discussed. To keep changes to ATNTS2004 transparent we maintain its subdivision into headings as much as possible.

1,479 citations

Journal ArticleDOI
11 Sep 2020-Science
TL;DR: A new, highly resolved, astronomically dated, continuous composite of benthic foraminifer isotope records developed in the authors' laboratories reveals the key role that polar ice volume plays in the predictability of Cenozoic climate dynamics.
Abstract: Much of our understanding of Earth's past climate comes from the measurement of oxygen and carbon isotope variations in deep-sea benthic foraminifera. Yet, long intervals in existing records lack the temporal resolution and age control needed to thoroughly categorize climate states of the Cenozoic era and to study their dynamics. Here, we present a new, highly resolved, astronomically dated, continuous composite of benthic foraminifer isotope records developed in our laboratories. Four climate states-Hothouse, Warmhouse, Coolhouse, Icehouse-are identified on the basis of their distinctive response to astronomical forcing depending on greenhouse gas concentrations and polar ice sheet volume. Statistical analysis of the nonlinear behavior encoded in our record reveals the key role that polar ice volume plays in the predictability of Cenozoic climate dynamics.

655 citations

Journal ArticleDOI
TL;DR: A review of recent to late Oligocene calcareous nannofossil datum events can be found in this article, where a taxonomy of the index taxa and their biostratigraphic usefulness is presented.

453 citations

Journal ArticleDOI
Pinxian Wang1
TL;DR: In this article, satellite and conventional observations support an alternative hypothesis which considers monsoon as a manifestation of seasonal migration of the intertropical convergence zone (ITCZ) and, hence, a climate system of the global scale.
Abstract: Monsoon is now considered as a global system rather than regional phenomena only. For over 300 years, monsoon has been viewed as a gigantic land-sea breeze, but now satellite and conventional observations support an alternative hypothesis which considers monsoon as a manifestation of seasonal migration of the intertropical convergence zone (ITCZ) and, hence, a climate system of the global scale. As a low-latitude climate system, monsoon exists over all continents but Antarctica, and through all the geological history at least since the Phenorozoic. The time is ripe for systematical studies of monsoon variations in space and time. As evidenced by the geological records, the global monsoon is controlled by the Wilson cycle on the tectonic time scale (106–108 a). A “Mega-continent” produces “Mega-monsoon”, and its breakdown leads to weakening of the monsoon intensity. On the time scales of 104-105 a, the global monsoon displays the precessional cycles of ∼20 ka and eccentricity cycles of 100- and 400-ka, i.e. the orbital cycles. On the time scales of 103 a and below, the global monsoon intensity is modulated by solar cycles and other factors. The cyclicity of global monsoon represents one of the fundamental factors responsible for variations in the Earth surface system as well as for the environmental changes of the human society. The 400-ka long eccentricity cycles of the global monsoon is likened to “heartbeat” of the Earth system, and the precession cycle of the global monsoon was responsible for the collapse of several Asian and African ancient cultures at ∼4000 years ago, whereas the Solar cycles led to the demise of the Maya civilization about a thousand years ago. Therefore, paleoclimatology should be focused not only on the high-latitude processes centered at ice cap variations, but also on the low-latitude processes such as monsoons, as the latter are much more common in the geological history compared to the glaciations.

220 citations

Journal ArticleDOI
TL;DR: In this paper, the origin of third-order eustatic sequences is reviewed by comparing recent sequence stratigraphic data to the latest, best-constrained astronomical model.

206 citations


Cites background or result from "Extended orbitally forced palaeocli..."

  • ...Thus, the close correspondance in number and in timing and the aforhighlighted ions (δ18O data are from Pälike et al., 2006a)....

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  • ...More interestingly, the ~1.2-myr obliquity cycle was demonstrated as a beat in the major glacial episodes (Zachos et al., 2001b; Wade and Pälike, 2004; Pälike et al., 2006a,b)....

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  • ...…data are from Miller et al. (1991, 1998), otherwise sources are shown in superscript rding to Pälike et al. (2006a), Oi2x corresponds to the unnamed event in Miller et al. (1997), Wes: Westerhold et al. (2005), B: Billups et al. (2002), P: Pekar and DeConto TS model of Pälike et al. (2006a)....

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  • ...…letters, from left to right, as follows. pe data are from Miller et al. (1991, 1998), otherwise sources are shown in superscript rding to Pälike et al. (2006a), Oi2x corresponds to the unnamed event in Miller et al. (1997), Wes: Westerhold et al. (2005), B: Billups et al. (2002), P:…...

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  • ...…records, and apparently have a significant influence on global climate (e.g., Beaufort, 1994; Olsen and Kent, 1999; Zachos et al., 2001a,b; Pälike et al., 2004, 2006a,b; Wade and Pälike, 2004; Mitchell et al., 2008) and sea-level change (e.g. Lourens and Hilgen, 1997; Strasser et al.,…...

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References
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Journal ArticleDOI
27 Apr 2001-Science
TL;DR: This work focuses primarily on the periodic and anomalous components of variability over the early portion of this era, as constrained by the latest generation of deep-sea isotope records.
Abstract: Since 65 million years ago (Ma), Earth's climate has undergone a significant and complex evolution, the finer details of which are now coming to light through investigations of deep-sea sediment cores. This evolution includes gradual trends of warming and cooling driven by tectonic processes on time scales of 10(5) to 10(7) years, rhythmic or periodic cycles driven by orbital processes with 10(4)- to 10(6)-year cyclicity, and rare rapid aberrant shifts and extreme climate transients with durations of 10(3) to 10(5) years. Here, recent progress in defining the evolution of global climate over the Cenozoic Era is reviewed. We focus primarily on the periodic and anomalous components of variability over the early portion of this era, as constrained by the latest generation of deep-sea isotope records. We also consider how this improved perspective has led to the recognition of previously unforeseen mechanisms for altering climate.

8,903 citations


"Extended orbitally forced palaeocli..." refers background or methods or result in this paper

  • ...We previously suggested that the Mi–1 glaciation event at 23Ma was related to a rare confluence of reduced obliquity amplitude variations (a obliquity ‘‘node’’) in combination with low eccentricity (Zachos et al., 2001b)....

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  • ...4 also shows a comparison of our extended data set with the global multi-site compilation of Zachos et al. (2001a)....

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  • ...Interestingly, of the palaeoceanographic proxy time series, the coarse fraction record contains significant spectral peaks at the three climatic precession frequencies, which were also established in the spliced record of Zachos et al. (2001b)....

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  • ...Previously published benthic foraminifer data from ODP Site 926B (Paul et al., 2000; Zachos et al., 2001b) were extended and are plotted with (d) the 463mm coarse fraction data....

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  • ...We note that ETP resembles Northern 0.0 0.2 0.4 0.6 Coarse fraction sin -1 (%/100) 0.5 012 δ18O (‰) -1012 δ13C (‰) -2 f sed) 012 δ18O(‰) (Zachos et al. 2001b) (a)(b)(c)(d) M i-1 l., 2004)....

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Book
01 Jan 2017
TL;DR: In this paper, simple descriptive techniques for time series estimation in the time domain forecasting stationary processes in the frequency domain spectral analysis bivariate processes linear systems state-space models and the Kalman filter non-linear models multivariate time series modelling some other topics.
Abstract: Simple descriptive techniques probability models for time series estimation in the time domain forecasting stationary processes in the frequency domain spectral analysis bivariate processes linear systems state-space models and the Kalman filter non-linear models multivariate time series modelling some other topics.

3,694 citations

Journal ArticleDOI
TL;DR: An adjusted geomagnetic reversal chronology for the Late Cretaceous and Cenozoic is presented that is consistent with astrochronology in the Pleistocene and Pliocene and with a new timescale for the Mesozoic.
Abstract: Recently reported radioisotopic dates and magnetic anomaly spacings have made it evident that modification is required for the age calibrations for the geomagnetic polarity timescale of Cande and Kent (1992) at the Cretaceous/Paleogene boundary and in the Pliocene. An adjusted geomagnetic reversal chronology for the Late Cretaceous and Cenozoic is presented that is consistent with astrochronology in the Pleistocene and Pliocene and with a new timescale for the Mesozoic. The age of 66 Ma for the Cretaceous/Paleogene (K/P) boundary used for calibration in the geomagnetic polarity timescale of Cande and Kent (1992) (hereinafter referred to as CK92) was supported by high precision laser fusion Ar/Ar sanidine single crystal dates from nonmarine strata in Montana. However, these age determinations are now

3,582 citations


"Extended orbitally forced palaeocli..." refers background or methods in this paper

  • ...…the code with a letter abbreviation for the geological epoch (Mi for Miocene, Ol for Oligocene) and an indication within which magnetic reversal interval this cycle falls for existing astronomically calibrated sections (Lourens et al., 2005), following the convention of Cande and Kent (1995)....

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  • ...…year long amplitude modulation cycle of obliquity indicated that the age of the Oligocene/Miocene boundary be moved from its previous age of 23.8Ma (Cande and Kent, 1995) to 22.9Ma (Shackleton et al., 2000), and that the amplitude variation of climatic precession would place a further constraint…...

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  • ...Some of the additional magnetic reversal ages given in Lourens et al. (2005) were derived from Australia–Antarctic spreading distances, which are said to improve the original approach of fitting a smooth spline curve to a smaller number of tiepoints as was done by Cande and Kent (1995)....

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  • ..., 2003), and the ages obtained for ODP Leg 154 can be used to refine the geomagnetic polarity time scale (Cande and Kent, 1995)....

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  • ...The record from ODP Leg 177 contained a well-defined data set of magnetic polarity measurements (Channell et al., 2003), and the ages obtained for ODP Leg 154 can be used to refine the geomagnetic polarity time scale (Cande and Kent, 1995)....

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Journal ArticleDOI
TL;DR: In this article, a new solution for the astronomical computation of the insolation quantities on Earth spanning from −250 m to 250 m was presented, where the most regular components of the orbital solution could still be used over a much longer time span, which is why they provided here the solution over 250 m.
Abstract: We present here a new solution for the astronomical computation of the insolation quantities on Earth spanning from -250 Myr to 250 Myr. This solution has been improved with respect to La93 (Laskar et al. [CITE]) by using a direct integration of the gravitational equations for the orbital motion, and by improving the dissipative contributions, in particular in the evolution of the Earth–Moon System. The orbital solution has been used for the calibration of the Neogene period (Lourens et al. [CITE]), and is expected to be used for age calibrations of paleoclimatic data over 40 to 50 Myr, eventually over the full Palaeogene period (65 Myr) with caution. Beyond this time span, the chaotic evolution of the orbits prevents a precise determination of the Earth's motion. However, the most regular components of the orbital solution could still be used over a much longer time span, which is why we provide here the solution over 250 Myr. Over this time interval, the most striking feature of the obliquity solution, apart from a secular global increase due to tidal dissipation, is a strong decrease of about 0.38 degree in the next few millions of years, due to the crossing of the resonance (Laskar et al. [CITE]). For the calibration of the Mesozoic time scale (about 65 to 250 Myr), we propose to use the term of largest amplitude in the eccentricity, related to , with a fixed frequency of /yr, corresponding to a period of 405 000 yr. The uncertainty of this time scale over 100 Myr should be about , and over the full Mesozoic era.

2,992 citations


"Extended orbitally forced palaeocli..." refers background or methods or result in this paper

  • ...(e) Shows ag obliquity and 1:2Ma obliquity amplitude modulation from Laskar et al. (2004 (‘‘ETP’’), using Laskar et al. (2004), with relative amplitudes reflecting those of 400 ka bandpass filters ( 0:5Ma 1 gaussian bandwidth) applied on ETP (blac position, count and identification of the absolute…...

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  • ...The spectral characteristics of the data and the astronomical solution of Laskar et al. (2004) are summarised in Fig....

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  • ...We note here that the new astronomical solution of Laskar et al. (2004) uses current day values for tidal dissipation and dynamical ellipticity (Pälike and Shackleton, 2000), the established phase relationships for obliquity and climatic precession would be altered when different histories for the…...

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  • ...The new astronomical solution La2004 (Laskar et al., 2004) does still exhibit a node in the obliquity amplitude variation, but this is not as pronounced during the Mi–1 event as previous astronomical solutions....

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  • ...Very recently, an updated and much improved calculation of Earth’s orbital variations was published (Laskar et al., 2004)....

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BookDOI
01 Jan 2004
TL;DR: Gradstein et al. as discussed by the authors proposed a chronostratigraphy approach for linking time and rock in the context of geologic time scales, including the geomagnetic polarity time scale and stable isotope geochronology.
Abstract: Part I. Introduction: 1. Introduction F. M. Gradstein 2. Chronostratigraphy - linking time and rock F. M. Gradstein, J. G. Ogg and A. G. Smith Part II. Concepts and Methods: 3. Biostratigraphy F. M. Gradstein, R. A. Cooper and P. M. Sadler 4. Earth's orbital parameters and cycle stratigraphy L. A. Hinnov 5. The geomagnetic polarity time scale J. G. Ogg and A. G. Smith 6. Radiogenic isotope geochronology M. Villeneuve 7. Stable isotopes J. M. McArthur and R. J. Howarth 8. Geomathematics F. P. Agterberg Part III. Geologic Periods: 9. The Precambrian: the Archaen and Proterozoic eons L. J. Robb, A. H. Knoll, K. A. Plumb, G. A. Shields, H. Strauss and J. Veizer 10. Toward a 'natural' Precambrian time scale W. Bleeker 11. The Cambrian period J. H. Shergold and R. A. Cooper 12. The Ordovician period R. A. Cooper and P. M. Sadler 13. The Silurian period M. J. Melchin, R. A. Cooper and P. M. Sadler 14. The Devonian period M. R. House and F. M. Gradstein 15. The Carboniferous period V. Davydov, B. R. Wardlaw and F. M. Gradstein 16. The Permian period B. R. Wardlaw, V. Davydov and F. M. Gradstein 17. The Triassic period J. G. Ogg 18. The Jurassic period J. G. Ogg 19. The Cretaceous Period J. G. Ogg, F. P. Agterberg and F. M. Gradstein 20. The Paleogene period H. P. Luterbacher, J. R. Ali, H. Brinkhuis, F. M. Gradstein, J. J. Hooker, S. Monechi, J. G. Ogg, J. Powell, U. Rohl, A. Sanfilippo, and B. Schmitz 21. The Neogene period L. Lourens, F. Hilgen, N. J. Shackleton, J. Laskar and D. Wilson 22. The Pleistocene and Holocene epochs P. Gibbard and T. van Kolfschoten Part IV. Summary: 23. Construction and summary of the geologic time scale F. M.. Gradstein, J. G. Ogg and A. G. Smith Appendices Bibliography Stratigraphic index General index.

2,890 citations