Frequency modulation reveals the phasing of orbital eccentricity during Cretaceous Oceanic Anoxic Event II and the Eocene hyperthermals

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F16%3A00458676" target="_blank" >RIV/67985530:_____/16:00458676 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.epsl.2016.02.047" target="_blank" >http://dx.doi.org/10.1016/j.epsl.2016.02.047</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.epsl.2016.02.047" target="_blank" >10.1016/j.epsl.2016.02.047</a>

Result language
angličtina
Original language name
Frequency modulation reveals the phasing of orbital eccentricity during Cretaceous Oceanic Anoxic Event II and the Eocene hyperthermals
Original language description
Major advances in our understanding of paleoclimate change derive from a precise reconstruction of the periods, amplitudes and phases of the Milankovitch cycles’ of precession, obliquity and eccentricity. While numerous quantitativeapproaches exist for the identification of these astronomical cycles in stratigraphic data, limitations in radioisotopic dating, and instability of the theoretical astronomical solutions beyond ∼50 Myr ago, can challenge identification of the phase relationships needed to constrain climate response and anchor floating astrochronologies. Here we demonstrate that interference patterns accompanying frequency modulation (FM) of short eccentricity provide a robust basis for identifying the phase of long eccentricity forcing in stratigraphic data. One-and two-dimensional models of sedimentary distortion of the astronomical signal are used to evaluate the veracity of the FM method, and indicate that pristine eccentricity FM can be readily distinguishedin paleo-records. Apart from paleoclimatic implications, the FM approach provides a quantitative technique for testing and calibrating theoretical astronomical solutions, and for refining chronologies for the deep past.n
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Project
<a href="/en/project/LH12041" target="_blank" >LH12041: Sea-level oscillations and changes in atmospheric CO2 concentrations during the peak Greenhouse (Cenomanian-Turonian, Western Interior basin)</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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