Chronology and Eccentricity Phasing for the Early Turonian Greenhouse (∼93–94 Ma): Constraints on Astronomical Control of the Carbon Cycle
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F21%3A00000098" target="_blank" >RIV/00025798:_____/21:00000098 - isvavai.cz</a>
Alternative codes found
RIV/67985530:_____/21:00543114 RIV/67985831:_____/21:00543114
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/toc/25724525/current" target="_blank" >https://agupubs.onlinelibrary.wiley.com/toc/25724525/current</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2020PA004188" target="_blank" >10.1029/2020PA004188</a>
Alternative languages
Result language
angličtina
Original language name
Chronology and Eccentricity Phasing for the Early Turonian Greenhouse (∼93–94 Ma): Constraints on Astronomical Control of the Carbon Cycle
Original language description
The Early Turonian interval represents a unique confluence of climatic and oceanographic conditions including peak surface temperatures, high greenhouse-gas concentrations, and maximum Phanerozoic sea level. The susceptibility of this climate mode to astronomical insolation forcing remains poorly understood partly due to a limited time control and unknown phasing of astronomical cycles in this interval. Here, we offer a refined astrochronology of the Early Turonian based on laterally consistentprecession signals preserved in offshore strata of the Bohemian Cretaceous Basin (central Europe).Pristine amplitude modulation verified through interference patterns in depth-frequency plots provides a robust indication of ∼100 and 405-kyr eccentricity phases (maxima and minima) that are pinned to ammonite biozones and new carbon-isotope data from two cores. The Early Turonian is estimated as 885 ± 41 (2sigma) thousand years (kyr) in duration, with the Cenomanian/Turonian boundary predating the first Turonian 405-kyr maximum (no. 232 in the Geological Time Scale 2020) by 82 ± 70 (2sigma) kyr. The results support a possible link of the recovery from Oceanic Anoxic Event II to increasing magnitude of seasonal insolation extremes due to rising eccentricity on 405-kyr and million-year (Myr) time scales. Superimposed upon this trend are small-scale carbon-isotope anomalies the pacing of which passes from ∼110 kyr, resembling short eccentricity, to ∼170 kyr, possibly related to obliquity modulation.This eccentricity-to-obliquity transition, paralleling the rising phase of Myr-scale eccentricity, suggests decoupling of the carbon-cycle perturbations from low-latitude seasonal insolation. Mid-latitude to highlatitude carbon reservoirs became involved toward the Middle Turonian.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA17-10982S" target="_blank" >GA17-10982S: Sea-level change and global carbon cycle in greenhouse climate: trans-Atlantic correlation of Turonian (mid-Cretaceous) sedimentary archives</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Paleoceanography and Paleoclimatology
ISSN
2572-4517
e-ISSN
2572-4525
Volume of the periodical
36
Issue of the periodical within the volume
4 : e2020PA004188
Country of publishing house
US - UNITED STATES
Number of pages
19
Pages from-to
nestránkováno
UT code for WoS article
000644566400019
EID of the result in the Scopus database
2-s2.0-85104934266