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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

—

Projekt

<a href="/cs/project/LH12041" target="_blank" >LH12041: Oscilace mořské hladiny a změny atmosférických koncentrací CO2 během vrcholného skleníkového klimatu (cenoman-turon, pánev Western Interior)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Earth and Planetary Science Letters

ISSN

0012-821X

e-ISSN

—

Svazek periodika

442

Číslo periodika v rámci svazku

15 May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

143-156

Kód UT WoS článku

000375348700014

EID výsledku v databázi Scopus

2-s2.0-84960968488