Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Lloyd D. Keigwin"'
Publikováno v:
Communications Earth & Environment, Vol 3, Iss 1, Pp 1-11 (2022)
A strong outflow event from Lake Agassiz at the end of the Bølling-Allerød plausibly caused the Younger Dryas cold period by an abrupt Arctic freshening, according to geochemical investigation of sediment cores from the Canadian Arctic.
Externí odkaz:
https://doaj.org/article/a0c8c68e612a4d3db33b73a07abca5cf
Autor:
Ning Zhao, Delia W. Oppo, Kuo-Fang Huang, Jacob N. W. Howe, Jerzy Blusztajn, Lloyd D. Keigwin
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
The Nd isotope composition of seawater has been used to reconstruct past changes in the various contributions of different water masses to the deep ocean, with the isotope signatures of endmember water masses generally assumed to have been stable dur
Externí odkaz:
https://doaj.org/article/1217c6c2b02a4533bbc1808e0a0faf41
Autor:
Ning Zhao, Lloyd D. Keigwin
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018)
Chronological assumptions in marine sediment records can result in uncertainties in paleoenvironmental reconstructions. Here, using computed tomography to identify in situ woody debris, the authors construct a robust 14C chronology and reassess venti
Externí odkaz:
https://doaj.org/article/b5c5439296464cb1935df976578e619f
Autor:
Ning Zhao, Delia W. Oppo, Kuo-Fang Huang, Jacob N. W. Howe, Jerzy Blusztajn, Lloyd D. Keigwin
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-1 (2020)
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Externí odkaz:
https://doaj.org/article/009ccf819d48491cab66f1ff28741d1d
Publikováno v:
Geophysical Journal International. 225:1129-1141
SUMMARY Palaeomagnetic secular variation (PSV) and excursion data obtained across MIS 8 (243–300 ka) from the western North Atlantic Ocean ODP (Ocean Drilling Program) sites 1060–1063 show composite high-resolution PSV records (both directions an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63623f68c80c0e6388d256673e31da20
https://doi.org/10.1093/gji/ggaa564
https://doi.org/10.1093/gji/ggaa564
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
Nature Communications
Nature Communications
The Nd isotope composition of seawater has been used to reconstruct past changes in the contribution of different water masses to the deep ocean. In the absence of contrary information, the Nd isotope compositions of endmember water masses are usuall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a4c50cb9d2f7049693d424f54d1d5f6
https://doaj.org/article/1217c6c2b02a4533bbc1808e0a0faf41
https://doaj.org/article/1217c6c2b02a4533bbc1808e0a0faf41
Publikováno v:
Quaternary Science Reviews. 203:185-208
The first regional model for the deglacial history of the Beaufort margin slope, in the western Arctic, is presented. The conceptual model was developed using new high-resolution CHIRP seismic reflection, multibeam bathymetry, and sediment core data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64d67bb8ec15f5fa96d12c512339c3ed
https://doi.org/10.1016/j.quascirev.2018.11.014
https://doi.org/10.1016/j.quascirev.2018.11.014
Autor:
Lloyd D Keigwin, Isabelle M. Gil
Publikováno v:
Earth and Planetary Science Letters. 500:47-55
Millennial scale events marked by the contribution of detrital sand are recorded in North Atlantic sediments during the Last Glacial Maximum (LGM), between Heinrich events (HE) 1 and 2, and left their imprint on Laurentian Fan (LF – 43°N) sediment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::662356231df3ec7b3d53872dab817c74
https://doi.org/10.1016/j.epsl.2018.07.038
https://doi.org/10.1016/j.epsl.2018.07.038
Autor:
Lloyd D Keigwin, Ning Zhao, Neal W. Driscoll, Brendan T Reilly, Shannon Klotsko, Liviu Giosan
Publikováno v:
Nature Geoscience. 11:599-604
A period of cooling about 13,000 years ago interrupted about 2,000 years of deglacial warming. Known as the Younger Dryas (YD), the event is thought to have resulted from a slowdown of the Atlantic meridional overturning circulation in response to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7da88addf7733ac683d01adae6a2e89f
https://doi.org/10.1038/s41561-018-0169-6
https://doi.org/10.1038/s41561-018-0169-6
Publikováno v:
Paleoceanography and Paleoclimatology, 33 (5). pp. 530-543.
The notion of a shallow northern sourced intermediate water mass is a well evidenced feature of the Atlantic circulation scheme of the Last Glacial Maximum (LGM). However, recent observations from stable carbon isotopes (δ13C) at the Corner Rise in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c0e5d859f3ad140bf1e9015cc8186ef
https://doi.org/10.1029/2017pa003290
https://doi.org/10.1029/2017pa003290