Contrasting response of sea-level change to orbital eccentricity in greenhouse and icehouse climates

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F23%3A00576472" target="_blank" >RIV/67985530:_____/23:00576472 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/23:10475484

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0012821X2300434X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0012821X2300434X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.epsl.2023.118421" target="_blank" >10.1016/j.epsl.2023.118421</a>

Result language

angličtina

Original language name

Contrasting response of sea-level change to orbital eccentricity in greenhouse and icehouse climates

Original language description

Climate-controlled changes in eustatic sea level (ESL) are linked to transfers of water between ocean and land, thus offering a rare insight into the past hydrological cycle. In this study, we examine the timing and phase of Milankovitch-scale ESL cycles in the peak Cretaceous greenhouse, the early Turonian (-93-94 million years, Myr, ago). A high-resolution astronomical framework established for the Bohemian Cretaceous Basin (central Europe) suggests a -400-kyr pace and a distinct asymmetry of interpreted ESL cycles. The rising limbs of ESL change constitute only 20-30 % of the cycle, and are encased entirely within the falling phase of the 405-kyr eccentricity. The intervening ESL falls (<= 6 m in magnitude) are more protracted, starting within 70 kyr prior to the eccentricity minima and culminating -60 kyr after the 405-kyr eccentricity maxima. Despite similarities to the sawtooth shape of -100-kyr glacioeustatic oscillations of the Late Pleistocene, the time scales and phasing are unparalleled in the Pleistocene icehouse. A similar, 405-kyr pace is found in ice-volume variations of the early Miocene, but the timing of glacioeustatic change relative to eccentricity forcing is incompatible with the phase of greenhouse sea-level oscillations. The phasing points to major differences in the geographic location and insolation sensitivity of the key hydrological reservoirs under icehouse and greenhouse regimes. The inferred structure of greenhouse eustasy points to low- or middle-latitude water storage, likely aquifers, that charge (expand) with rising seasonality variations and discharge (contract) with declining seasonality amplitudes on the 405-kyr scale. The net volume of water transferred on these time scales is within 2.2 x 106 km3, equivalent to <= 10 % of the present-day storage in the uppermost 2 km of continental crust. Potential additive interference with steric eustasy, proportionally relevant during greenhouse regimes, could reduce the volumes required for continental storage.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Earth and Planetary Science Letters

ISSN

0012-821X

e-ISSN

1385-013X

Volume of the periodical

622

Issue of the periodical within the volume

November

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

13

Pages from-to

118421

UT code for WoS article

001097862900001

EID of the result in the Scopus database

2-s2.0-85174046228