Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise
Benthic foraminifer and delta13C data from Site 849, on the west flank of the East Pacific Rise (0°11 'N, 110°31'W; 3851 m), give relatively continuous records of deep Pacific Ocean stable isotope variations between 0 and 5 Ma. The mean sample spacing is 4 k.y. Most analyses are from Cibic...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.701400 2024-10-20T14:03:31+00:00 Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise Mix, Alan C Pisias, Nicklas G Rugh, W D Wilson, June Morey, Ann E Hagelberg, Teresa King MEDIAN LATITUDE: -0.563311 * MEDIAN LONGITUDE: -78.764032 * SOUTH-BOUND LATITUDE: -46.879500 * WEST-BOUND LONGITUDE: -110.519710 * NORTH-BOUND LATITUDE: 41.001200 * EAST-BOUND LONGITUDE: 7.420650 * DATE/TIME START: 1983-07-06T00:00:00 * DATE/TIME END: 1991-09-07T00:00:00 1995 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.701400 https://doi.org/10.1594/PANGAEA.701400 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.701400 https://doi.org/10.1594/PANGAEA.701400 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Mix, Alan C; Pisias, Nicklas G; Rugh, W D; Wilson, June; Morey, Ann E; Hagelberg, Teresa King (1995): Benthic foraminifer stable isotope record from Site 849 (0-5 Ma): local and global climate changes. In: Pisias, NG; Mayer, LA; Janecek, TR; Palmer-Julson, A; van Andel, TH (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 138, 371-412, https://doi.org/10.2973/odp.proc.sr.138.120.1995 111-677 114-704 138-849 138-849B 138-849C 138-849D 94-607_Site COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg111 Leg114 Leg138 Leg94 North Atlantic/FLANK North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean dataset publication series 1995 ftpangaea https://doi.org/10.1594/PANGAEA.70140010.2973/odp.proc.sr.138.120.1995 2024-10-09T00:07:51Z Benthic foraminifer and delta13C data from Site 849, on the west flank of the East Pacific Rise (0°11 'N, 110°31'W; 3851 m), give relatively continuous records of deep Pacific Ocean stable isotope variations between 0 and 5 Ma. The mean sample spacing is 4 k.y. Most analyses are from Cibicides wuellerstorfi, but isotopic offsets relative to Uvigerina peregrina appear roughly constant. Because of its location west of the East Pacific Rise, Site 849 yields a suitable record of mean Pacific Ocean delta13C, which approximates a global oceanic signal. The ~100-k.y.-period climate cycle, which is prevalent in delta18O does not dominate the long-term delta13C record. For delta13C, variations in the ~400- and 41-k.y. periods are more important. Phase lags of delta13C relative to ice volume in the 41- and 23-k.y. bands are consistent with delta13C as a measure of organic biomass. A model-calculated exponential response time of 1-2 k.y. is appropriate for carbon stored in soils and shallow sediments responding to glacial-interglacial climate change. Oceanic delta13C leads ice volume slightly in the 100-k.y. band, and this suggests another process such as changes in continental weathering to modulate mean river delta13C at long periods. The delta13C record from Site 849 diverges from that of Site 677 in the Panama Basin mostly because of decay of 13C-depleted organic carbon in the relatively isolated Panama Basin. North Atlantic to Pacific delta13C differences calculated using published data from Sites 607 and 849 reveal variations in Pliocene deep water within the range of those of the late Quaternary. Maximum delta13C contrast between these sites, which presumably reflects maximum influx of high-delta13C northern source water into the deep North Atlantic Ocean, occurred between 1.3 and 2.1 Ma, well after the initiation of Northern Hemisphere glaciation. Export of high-delta13C North Atlantic Deep Water from the Atlantic to the circumpolar Antarctic, as recorded by published delta13C data from Subantarctic Site 704, ... Other/Unknown Material Antarc* Antarctic North Atlantic Deep Water North Atlantic South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Pacific ENVELOPE(-110.519710,7.420650,41.001200,-46.879500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
111-677 114-704 138-849 138-849B 138-849C 138-849D 94-607_Site COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg111 Leg114 Leg138 Leg94 North Atlantic/FLANK North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
111-677 114-704 138-849 138-849B 138-849C 138-849D 94-607_Site COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg111 Leg114 Leg138 Leg94 North Atlantic/FLANK North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean Mix, Alan C Pisias, Nicklas G Rugh, W D Wilson, June Morey, Ann E Hagelberg, Teresa King Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise |
topic_facet |
111-677 114-704 138-849 138-849B 138-849C 138-849D 94-607_Site COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg111 Leg114 Leg138 Leg94 North Atlantic/FLANK North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean |
description |
Benthic foraminifer and delta13C data from Site 849, on the west flank of the East Pacific Rise (0°11 'N, 110°31'W; 3851 m), give relatively continuous records of deep Pacific Ocean stable isotope variations between 0 and 5 Ma. The mean sample spacing is 4 k.y. Most analyses are from Cibicides wuellerstorfi, but isotopic offsets relative to Uvigerina peregrina appear roughly constant. Because of its location west of the East Pacific Rise, Site 849 yields a suitable record of mean Pacific Ocean delta13C, which approximates a global oceanic signal. The ~100-k.y.-period climate cycle, which is prevalent in delta18O does not dominate the long-term delta13C record. For delta13C, variations in the ~400- and 41-k.y. periods are more important. Phase lags of delta13C relative to ice volume in the 41- and 23-k.y. bands are consistent with delta13C as a measure of organic biomass. A model-calculated exponential response time of 1-2 k.y. is appropriate for carbon stored in soils and shallow sediments responding to glacial-interglacial climate change. Oceanic delta13C leads ice volume slightly in the 100-k.y. band, and this suggests another process such as changes in continental weathering to modulate mean river delta13C at long periods. The delta13C record from Site 849 diverges from that of Site 677 in the Panama Basin mostly because of decay of 13C-depleted organic carbon in the relatively isolated Panama Basin. North Atlantic to Pacific delta13C differences calculated using published data from Sites 607 and 849 reveal variations in Pliocene deep water within the range of those of the late Quaternary. Maximum delta13C contrast between these sites, which presumably reflects maximum influx of high-delta13C northern source water into the deep North Atlantic Ocean, occurred between 1.3 and 2.1 Ma, well after the initiation of Northern Hemisphere glaciation. Export of high-delta13C North Atlantic Deep Water from the Atlantic to the circumpolar Antarctic, as recorded by published delta13C data from Subantarctic Site 704, ... |
format |
Other/Unknown Material |
author |
Mix, Alan C Pisias, Nicklas G Rugh, W D Wilson, June Morey, Ann E Hagelberg, Teresa King |
author_facet |
Mix, Alan C Pisias, Nicklas G Rugh, W D Wilson, June Morey, Ann E Hagelberg, Teresa King |
author_sort |
Mix, Alan C |
title |
Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise |
title_short |
Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise |
title_full |
Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise |
title_fullStr |
Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise |
title_full_unstemmed |
Benthic foraminiferal stable isotope record from ODP Site 138-849 on the East Pacific Rise |
title_sort |
benthic foraminiferal stable isotope record from odp site 138-849 on the east pacific rise |
publisher |
PANGAEA |
publishDate |
1995 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.701400 https://doi.org/10.1594/PANGAEA.701400 |
op_coverage |
MEDIAN LATITUDE: -0.563311 * MEDIAN LONGITUDE: -78.764032 * SOUTH-BOUND LATITUDE: -46.879500 * WEST-BOUND LONGITUDE: -110.519710 * NORTH-BOUND LATITUDE: 41.001200 * EAST-BOUND LONGITUDE: 7.420650 * DATE/TIME START: 1983-07-06T00:00:00 * DATE/TIME END: 1991-09-07T00:00:00 |
long_lat |
ENVELOPE(-110.519710,7.420650,41.001200,-46.879500) |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic South Atlantic Ocean |
op_source |
Supplement to: Mix, Alan C; Pisias, Nicklas G; Rugh, W D; Wilson, June; Morey, Ann E; Hagelberg, Teresa King (1995): Benthic foraminifer stable isotope record from Site 849 (0-5 Ma): local and global climate changes. In: Pisias, NG; Mayer, LA; Janecek, TR; Palmer-Julson, A; van Andel, TH (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 138, 371-412, https://doi.org/10.2973/odp.proc.sr.138.120.1995 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.701400 https://doi.org/10.1594/PANGAEA.701400 |
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.70140010.2973/odp.proc.sr.138.120.1995 |
_version_ |
1813447907770105856 |