Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic)
The Last Interglacial (LIG), corresponding to Marine Isotope Stage (MIS) 5e, provides a reference of interglacial climate variability in the absence of anthropogenic forcing. Using an expanded section of the LIG gained at Integrated Ocean Drilling Program Site U1304 in the Subarctic Atlantic, we dem...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.856094 2023-05-15T17:29:22+02:00 Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic) Romero, Oscar E Swann, George E A Hodell, David A Helmke, Peer Rey, Daniel Rubio, Belen MEDIAN LATITUDE: 53.000944 * MEDIAN LONGITUDE: -33.529575 * SOUTH-BOUND LATITUDE: 53.000943 * WEST-BOUND LONGITUDE: -33.529683 * NORTH-BOUND LATITUDE: 53.000945 * EAST-BOUND LONGITUDE: -33.529467 * MINIMUM ELEVATION: -3069.1 m * MAXIMUM ELEVATION: -3065.4 m 2011-12-22 text/tab-separated-values, 151 data points https://doi.pangaea.de/10.1594/PANGAEA.856094 https://doi.org/10.1594/PANGAEA.856094 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.856094 https://doi.org/10.1594/PANGAEA.856094 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Romero, Oscar E; Swann, George E A; Hodell, David A; Helmke, Peer; Rey, Daniel; Rubio, Belen (2011): A highly productive Subarctic Atlantic during the Last Interglacial and the role of diatoms. Geology, 39(11), 1015-1018, https://doi.org/10.1130/G32454.1 303-U1304A 303-U1304B Diatoms δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 1 Sample code/label Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.856094 https://doi.org/10.1130/G32454.1 2023-01-20T09:06:40Z The Last Interglacial (LIG), corresponding to Marine Isotope Stage (MIS) 5e, provides a reference of interglacial climate variability in the absence of anthropogenic forcing. Using an expanded section of the LIG gained at Integrated Ocean Drilling Program Site U1304 in the Subarctic Atlantic, we demonstrate that the early MIS 5e was marked by oceanographic conditions conducive for high diatom production and accumulation. The appearance of diatom-dominated laminated oozes ~3 k.y. after the beginning of MIS 5e at ca. 125 ka coincides with a shift to higher d30Sidiat values together with the dominance of Thalassiothrix longissima, indicative of increased nutrient availability and silicic acid utilization in surface waters. Though the Subarctic Front provided the physical conditions for high diatom production and deposition, these processes alone are insufficient to explain the high rates of siliceous productivity and the formation of diatomaceous sediments. Instead, the additional presence of an increased nutrient pool provided by Subantarctic Mode Water played the decisive role in initiating and sustaining diatom production. The high diatom productivity and the occurrence of diatomaceous sediments in the late Quaternary challenge the current hypothesis of a silica-depleted North Atlantic during the LIG. Dataset North Atlantic Subarctic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-33.529683,-33.529467,53.000945,53.000943) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
303-U1304A 303-U1304B Diatoms δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 1 Sample code/label |
spellingShingle |
303-U1304A 303-U1304B Diatoms δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 1 Sample code/label Romero, Oscar E Swann, George E A Hodell, David A Helmke, Peer Rey, Daniel Rubio, Belen Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic) |
topic_facet |
303-U1304A 303-U1304B Diatoms δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 1 Sample code/label |
description |
The Last Interglacial (LIG), corresponding to Marine Isotope Stage (MIS) 5e, provides a reference of interglacial climate variability in the absence of anthropogenic forcing. Using an expanded section of the LIG gained at Integrated Ocean Drilling Program Site U1304 in the Subarctic Atlantic, we demonstrate that the early MIS 5e was marked by oceanographic conditions conducive for high diatom production and accumulation. The appearance of diatom-dominated laminated oozes ~3 k.y. after the beginning of MIS 5e at ca. 125 ka coincides with a shift to higher d30Sidiat values together with the dominance of Thalassiothrix longissima, indicative of increased nutrient availability and silicic acid utilization in surface waters. Though the Subarctic Front provided the physical conditions for high diatom production and deposition, these processes alone are insufficient to explain the high rates of siliceous productivity and the formation of diatomaceous sediments. Instead, the additional presence of an increased nutrient pool provided by Subantarctic Mode Water played the decisive role in initiating and sustaining diatom production. The high diatom productivity and the occurrence of diatomaceous sediments in the late Quaternary challenge the current hypothesis of a silica-depleted North Atlantic during the LIG. |
format |
Dataset |
author |
Romero, Oscar E Swann, George E A Hodell, David A Helmke, Peer Rey, Daniel Rubio, Belen |
author_facet |
Romero, Oscar E Swann, George E A Hodell, David A Helmke, Peer Rey, Daniel Rubio, Belen |
author_sort |
Romero, Oscar E |
title |
Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic) |
title_short |
Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic) |
title_full |
Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic) |
title_fullStr |
Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic) |
title_full_unstemmed |
Diatom isotope data (δ¹⁸Odiatom and d30Sidiatom) from IODP Site 303-U1304 (North Atlantic) |
title_sort |
diatom isotope data (δ¹⁸odiatom and d30sidiatom) from iodp site 303-u1304 (north atlantic) |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.856094 https://doi.org/10.1594/PANGAEA.856094 |
op_coverage |
MEDIAN LATITUDE: 53.000944 * MEDIAN LONGITUDE: -33.529575 * SOUTH-BOUND LATITUDE: 53.000943 * WEST-BOUND LONGITUDE: -33.529683 * NORTH-BOUND LATITUDE: 53.000945 * EAST-BOUND LONGITUDE: -33.529467 * MINIMUM ELEVATION: -3069.1 m * MAXIMUM ELEVATION: -3065.4 m |
long_lat |
ENVELOPE(-33.529683,-33.529467,53.000945,53.000943) |
genre |
North Atlantic Subarctic |
genre_facet |
North Atlantic Subarctic |
op_source |
Supplement to: Romero, Oscar E; Swann, George E A; Hodell, David A; Helmke, Peer; Rey, Daniel; Rubio, Belen (2011): A highly productive Subarctic Atlantic during the Last Interglacial and the role of diatoms. Geology, 39(11), 1015-1018, https://doi.org/10.1130/G32454.1 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.856094 https://doi.org/10.1594/PANGAEA.856094 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.856094 https://doi.org/10.1130/G32454.1 |
_version_ |
1766123282394775552 |