The duration and magnitude of Cretaceous cool events: Evidence from the northern high latitudes
dc.contributor.author | Vickers, M | |
dc.contributor.author | Price, G | |
dc.contributor.author | Jerrett, RM | |
dc.contributor.author | Sutton, P | |
dc.contributor.author | Watkinson, M | |
dc.contributor.author | FitzPatrick, M | |
dc.date.accessioned | 2019-04-05T11:34:10Z | |
dc.date.issued | 2019-04-25 | |
dc.identifier.issn | 0016-7606 | |
dc.identifier.issn | 1943-2674 | |
dc.identifier.uri | http://hdl.handle.net/10026.1/13669 | |
dc.description.abstract |
<jats:title>Abstract</jats:title><jats:p>The Early Cretaceous (145–100 Ma) was characterized by long-term greenhouse climates, with a reduced equatorial to polar temperature gradient, although an increasingly large body of evidence suggests that this period was punctuated by episodic global “cold snaps.” Understanding climate dynamics during this high-atmospheric CO2 period of Earth’s history may have significant impact on how we understand climatic feedbacks and predict future global climate changes under an anthropogenically-driven high-pCO2 atmosphere. This study utilizes facies analysis to constrain the paleobathymetry of Lower Cretaceous glendonites—a pseudomorph after ikaite, a mineral that forms naturally at 7 °C or lower—from two paleo-high-latitude (60–70°N) sites in Svalbard, Arctic Norway, to infer global climatic changes during the Early Cretaceous. The original ikaite formed in the offshore transition zone of a shallow marine shelf at water depths of <100 m, suggesting mean annual water temperatures of ≤7 °C at these depths at 60–70°N. We correlate glendonite-bearing horizons from Lower Cretaceous successions around the globe using carbon isotope stratigraphy, in conjunction with the pre-existing biostratigraphic framework, in order to infer northern hemispheric to global climatic cooling. A distinct interval of glendonites in the Northern Hemisphere, from sites >60°N, spans the late Berriasian to earliest Barremian (at least 8.6 m.y.), significantly prolonging the duration of the previously hypothesized Valanginian cold snap (associated with the “Weissert Event”). Widespread glendonites occur again in late Aptian and extend to the early Albian, in both hemispheres, corroborating other proxy evidence for late Aptian cooling. The glendonites from Svalbard suggest that Cretaceous cold episodes were characterized with high latitude (>60°N) shallow water temperatures that are consistent with the existence of a small northern polar ice cap at this time.</jats:p> | |
dc.format.extent | 1979-1994 | |
dc.language | en | |
dc.language.iso | en | |
dc.publisher | Geological Society of America | |
dc.subject | 37 Earth Sciences | |
dc.subject | 3709 Physical Geography and Environmental Geoscience | |
dc.subject | 3702 Climate Change Science | |
dc.subject | 3705 Geology | |
dc.subject | 13 Climate Action | |
dc.subject | 14 Life Below Water | |
dc.title | The duration and magnitude of Cretaceous cool events: Evidence from the northern high latitudes | |
dc.type | journal-article | |
dc.type | Article | |
plymouth.author-url | https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000493796300013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008 | |
plymouth.issue | 11-12 | |
plymouth.volume | 131 | |
plymouth.publication-status | Published | |
plymouth.journal | Geological Society of America Bulletin | |
dc.identifier.doi | 10.1130/B35074.1 | |
plymouth.organisational-group | /Plymouth | |
plymouth.organisational-group | /Plymouth/Faculty of Science and Engineering | |
plymouth.organisational-group | /Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences | |
plymouth.organisational-group | /Plymouth/Research Groups | |
plymouth.organisational-group | /Plymouth/Research Groups/Marine Institute | |
plymouth.organisational-group | /Plymouth/Users by role | |
plymouth.organisational-group | /Plymouth/Users by role/Academics | |
plymouth.organisational-group | /Plymouth/Users by role/Researchers in ResearchFish submission | |
dcterms.dateAccepted | 2019-02-27 | |
dc.rights.embargodate | 2020-4-24 | |
dc.identifier.eissn | 1943-2674 | |
dc.rights.embargoperiod | Not known | |
rioxxterms.versionofrecord | 10.1130/B35074.1 | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.licenseref.startdate | 2019-04-25 | |
rioxxterms.type | Journal Article/Review |