Glacial-interglacial cycle variability in loess-paleosol and deep sea proxy data through logistic regression

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43914918" target="_blank" >RIV/62156489:43410/18:43914918 - isvavai.cz</a>

Result on the web

<a href="http://www.shmu.sk/File/ExtraFiles/MET_CASOPIS/MC_2018-1.pdf" target="_blank" >http://www.shmu.sk/File/ExtraFiles/MET_CASOPIS/MC_2018-1.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Glacial-interglacial cycle variability in loess-paleosol and deep sea proxy data through logistic regression

Original language description

Glacial-interglacial cycles differed by various relationships between atmospheric CO2 content variability and sedimentary properties. In this study, we estimate variability of the sedimentary proxy data in Late Quaternary through logistic regression. Relationships between CO2 in the Vostok ice-core (east Antarctica) and Delta18O from deep-sea sediments of the Ontong Basin (east Pacific) and magnetic susceptibility (MS), grain size median (GSM) and CaCO3 from the Lingtai formation (central China) loess-paleosol sequence were modelled for the period between 417 and 0 ka (Glacials E-A and MIS 11-1). The variabilities were estimated by changes in regression parameters among the Saalian (SC3 417-126 ka), Weichselian (SC2 126-12 ka) and Holocene (SC1 12-0 ka) supercycles. Not all the deep-sea and loess sediment properties recorded supercycle CO2 variation in the same way. Overall, the Delta18O ratio characterised CO2 content most accurately. Correlations between CO2 and Delta18O, MS and CaCO3 showed an increasing trend, while that for GSM decreased. While the significance of the MS correlation was similar to that for CaCO3 and Delta18O in the Holocene period, it was the least significant relationship between the Saalian and Weichselian supercycles. The difference between loess-paleosol glacial and interglacial proxy data increased more than that of Delta18O. Glacial values were influenced by CO2 variation more than interglacial values. Deep-sea Delta18O and natural soil CaCO3 registered the transition between glacial and interglacial periods most reliably. The start of an interglacial period was more reliably predicted than that of a glacial period due to the low interglacial soil CaCO3 content. While low CaCO3 content was not related to CO2 or Delta18O variation, soil CaCO3 content &gt; 2% was. Natural variability in Holocene proxy data appears suitable for predicting future environmental changes.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10510 - Climatic research

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Meteorologický časopis

ISSN

1335-339X

e-ISSN

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Volume of the periodical

21

Issue of the periodical within the volume

1

Country of publishing house

SK - SLOVAKIA

Number of pages

10

Pages from-to

3-12

UT code for WoS article

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EID of the result in the Scopus database

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