Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337
The middle Miocene climate transition (MMCT) is characterized by an abrupt 1‰ increase in benthic foraminiferal oxygen isotopes at ca. 13.8 Ma, marking expansion of the Antarctic Ice Sheet and transition of Earth's climate to a cooler, relatively stable glacial state. Also occurring during this...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.893203 2024-09-15T17:40:24+00:00 Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 Carter, Samantha Cassie Griffith, Elizabeth M Penman, Donald E MEDIAN LATITUDE: 3.833445 * MEDIAN LONGITUDE: -123.206298 * SOUTH-BOUND LATITUDE: 3.833445 * WEST-BOUND LONGITUDE: -123.206430 * NORTH-BOUND LATITUDE: 3.833445 * EAST-BOUND LONGITUDE: -123.206035 * MINIMUM DEPTH, sediment/rock: 305.47 m * MAXIMUM DEPTH, sediment/rock: 321.22 m 2018 text/tab-separated-values, 1568 data points https://doi.pangaea.de/10.1594/PANGAEA.893203 https://doi.org/10.1594/PANGAEA.893203 en eng PANGAEA Tian, Jun; Yang, M; Lyle, Mitchell W; Wilkens, R; Shackford, Julia K (2013): Obliquity and long eccentricity pacing of the Middle Miocene climate transition. Geochemistry, Geophysics, Geosystems, 14(6), 1740-1755, https://doi.org/10.1002/ggge.20108 Wilkens, Roy H; Dickens, Gerald Roy; Tian, Jun; Backman, Jan; Expedition 320/321 Scientists (2013): Data report: revised composite depth scales for Sites U1336, U1337, and U1338. In: Proceedings of the IODP, Integrated Ocean Drilling Program, https://doi.org/10.2204/iodp.proc.320321.209.2013 https://doi.pangaea.de/10.1594/PANGAEA.893203 https://doi.org/10.1594/PANGAEA.893203 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Carter, Samantha Cassie; Griffith, Elizabeth M; Penman, Donald E (2016): Peak intervals of equatorial Pacific export production during the middle Miocene climate transition. Geology, 44(11), 923-926, https://doi.org/10.1130/G38290.1 321-U1337A 321-U1337C 321-U1337D Accumulation rate barite carbonate mass AGE shift Barium sulfate Calcium carbonate Carbon flux per year DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp321 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Latitude of event Longitude of event Pacific Equatorial Age Transect II / Juan de Fuca Sample code/label dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.89320310.1130/G38290.110.1002/ggge.2010810.2204/iodp.proc.320321.209.2013 2024-07-24T02:31:34Z The middle Miocene climate transition (MMCT) is characterized by an abrupt 1‰ increase in benthic foraminiferal oxygen isotopes at ca. 13.8 Ma, marking expansion of the Antarctic Ice Sheet and transition of Earth's climate to a cooler, relatively stable glacial state. Also occurring during this period is a globally recognized positive carbon isotope excursion (16.9-13.5 Ma) in benthic and planktonic foraminifera with shorter carbon isotope maxima (CM) events, linking hypotheses for climate change at the time with the carbon cycle. In order to test whether export production in the eastern equatorial Pacific is related to the largest such event (CM6), coincident with Antarctic Ice Sheet expansion, a high-resolution (<5 k.y.) record of export production at Integrated Ocean Drilling Program Site U1337 spanning the MMCT (14.02-13.43 Ma) was produced using marine pelagic barite mass accumulation rates. Export production is elevated with an extended period of more than double present-day values. These variations are not orbitally paced and provide evidence for a reorganization of nutrients supplied to the eastern equatorial Pacific in the Miocene and intensification of upwelling. If such changes are representative of the entire region, then this mechanism could sequester enough carbon to have a significant effect on atmospheric pCO2. However, continual delivery of nutrients to the surface waters of the eastern equatorial Pacific is required in order to sustain export production without depleting the surface ocean of limiting nutrients. This might be accomplished by a change in ocean circulation or a combination of other processes requiring further study. Dataset Antarc* Antarctic Ice Sheet Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-123.206430,-123.206035,3.833445,3.833445) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
321-U1337A 321-U1337C 321-U1337D Accumulation rate barite carbonate mass AGE shift Barium sulfate Calcium carbonate Carbon flux per year DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp321 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Latitude of event Longitude of event Pacific Equatorial Age Transect II / Juan de Fuca Sample code/label |
spellingShingle |
321-U1337A 321-U1337C 321-U1337D Accumulation rate barite carbonate mass AGE shift Barium sulfate Calcium carbonate Carbon flux per year DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp321 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Latitude of event Longitude of event Pacific Equatorial Age Transect II / Juan de Fuca Sample code/label Carter, Samantha Cassie Griffith, Elizabeth M Penman, Donald E Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 |
topic_facet |
321-U1337A 321-U1337C 321-U1337D Accumulation rate barite carbonate mass AGE shift Barium sulfate Calcium carbonate Carbon flux per year DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Exp321 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Latitude of event Longitude of event Pacific Equatorial Age Transect II / Juan de Fuca Sample code/label |
description |
The middle Miocene climate transition (MMCT) is characterized by an abrupt 1‰ increase in benthic foraminiferal oxygen isotopes at ca. 13.8 Ma, marking expansion of the Antarctic Ice Sheet and transition of Earth's climate to a cooler, relatively stable glacial state. Also occurring during this period is a globally recognized positive carbon isotope excursion (16.9-13.5 Ma) in benthic and planktonic foraminifera with shorter carbon isotope maxima (CM) events, linking hypotheses for climate change at the time with the carbon cycle. In order to test whether export production in the eastern equatorial Pacific is related to the largest such event (CM6), coincident with Antarctic Ice Sheet expansion, a high-resolution (<5 k.y.) record of export production at Integrated Ocean Drilling Program Site U1337 spanning the MMCT (14.02-13.43 Ma) was produced using marine pelagic barite mass accumulation rates. Export production is elevated with an extended period of more than double present-day values. These variations are not orbitally paced and provide evidence for a reorganization of nutrients supplied to the eastern equatorial Pacific in the Miocene and intensification of upwelling. If such changes are representative of the entire region, then this mechanism could sequester enough carbon to have a significant effect on atmospheric pCO2. However, continual delivery of nutrients to the surface waters of the eastern equatorial Pacific is required in order to sustain export production without depleting the surface ocean of limiting nutrients. This might be accomplished by a change in ocean circulation or a combination of other processes requiring further study. |
format |
Dataset |
author |
Carter, Samantha Cassie Griffith, Elizabeth M Penman, Donald E |
author_facet |
Carter, Samantha Cassie Griffith, Elizabeth M Penman, Donald E |
author_sort |
Carter, Samantha Cassie |
title |
Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 |
title_short |
Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 |
title_full |
Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 |
title_fullStr |
Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 |
title_full_unstemmed |
Analysis of the middle Miocene climate transition from different Holes of IODP Site 321-U1337 |
title_sort |
analysis of the middle miocene climate transition from different holes of iodp site 321-u1337 |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.893203 https://doi.org/10.1594/PANGAEA.893203 |
op_coverage |
MEDIAN LATITUDE: 3.833445 * MEDIAN LONGITUDE: -123.206298 * SOUTH-BOUND LATITUDE: 3.833445 * WEST-BOUND LONGITUDE: -123.206430 * NORTH-BOUND LATITUDE: 3.833445 * EAST-BOUND LONGITUDE: -123.206035 * MINIMUM DEPTH, sediment/rock: 305.47 m * MAXIMUM DEPTH, sediment/rock: 321.22 m |
long_lat |
ENVELOPE(-123.206430,-123.206035,3.833445,3.833445) |
genre |
Antarc* Antarctic Ice Sheet Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Ice Sheet Planktonic foraminifera |
op_source |
Supplement to: Carter, Samantha Cassie; Griffith, Elizabeth M; Penman, Donald E (2016): Peak intervals of equatorial Pacific export production during the middle Miocene climate transition. Geology, 44(11), 923-926, https://doi.org/10.1130/G38290.1 |
op_relation |
Tian, Jun; Yang, M; Lyle, Mitchell W; Wilkens, R; Shackford, Julia K (2013): Obliquity and long eccentricity pacing of the Middle Miocene climate transition. Geochemistry, Geophysics, Geosystems, 14(6), 1740-1755, https://doi.org/10.1002/ggge.20108 Wilkens, Roy H; Dickens, Gerald Roy; Tian, Jun; Backman, Jan; Expedition 320/321 Scientists (2013): Data report: revised composite depth scales for Sites U1336, U1337, and U1338. In: Proceedings of the IODP, Integrated Ocean Drilling Program, https://doi.org/10.2204/iodp.proc.320321.209.2013 https://doi.pangaea.de/10.1594/PANGAEA.893203 https://doi.org/10.1594/PANGAEA.893203 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.89320310.1130/G38290.110.1002/ggge.2010810.2204/iodp.proc.320321.209.2013 |
_version_ |
1810486432854179840 |