(Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040
Today the deep western boundary current (DWBC) east of New Zealand is the most important route for deep water entering the Pacific Ocean. Large-scale changes in deep water circulation patterns are thought to have been associated with the development of the East Antarctic Ice Sheet (EAIS) close to th...
Main Authors: | , , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2003
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.841718 https://doi.pangaea.de/10.1594/PANGAEA.841718 |
id |
ftdatacite:10.1594/pangaea.841718 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.841718 2023-05-15T13:33:00+02:00 (Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040 Hall, Ian R McCave, I Nick Zahn, Rainer Carter, Lionel Knutz, Paul Cornils Weedon, Graham P 2003 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.841718 https://doi.pangaea.de/10.1594/PANGAEA.841718 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2002pa000817 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Chronozone Sample code/label DEPTH, sediment/rock Depth, composite revised Age model Age model, optional Age, difference Drilling/drill rig DSDP/ODP/IODP sample designation Age model, Berggren et al 1995 BKSA95 Leg181 Joides Resolution Ocean Drilling Program ODP Supplementary Dataset dataset Dataset 2003 ftdatacite https://doi.org/10.1594/pangaea.841718 https://doi.org/10.1029/2002pa000817 2022-02-08T16:24:46Z Today the deep western boundary current (DWBC) east of New Zealand is the most important route for deep water entering the Pacific Ocean. Large-scale changes in deep water circulation patterns are thought to have been associated with the development of the East Antarctic Ice Sheet (EAIS) close to the main source of bottom water for the DWBC. Here we reconstruct the changing speed of the southwest Pacific DWBC during the middle Miocene from ~15.5-12.5 Ma, a period of significant global ice accumulation associated with EAIS growth. Sortable silt mean grain sizes from Ocean Drilling Program Site 1123 reveal variability in the speed of the Pacific inflow on the timescale of the 41 kyr orbital obliquity cycle. Similar orbital period flow changes have recently been demonstrated for the Pleistocene epoch. Collectively, these observations suggest that a strong coupling between changes in the speed of the deep Pacific inflow and high-latitude climate forcing may have been a persistent feature of the global thermohaline circulation system for at least the past 15 Myr. Furthermore, long-term changes in flow speed suggest an intensification of the DWBC under an inferred increase in Southern Component Water production. This occurred at the same time as decreasing Tethyan outflow and major EAIS growth between ~15.5 and 13.5 Ma. These results provide evidence that a major component of the deep thermohaline circulation was associated with the middle Miocene growth of the EAIS and support the view that this time interval represents an important step in the development of the Neogene icehouse climate. : DEPTH, sediment/rock [m] is given in mbsf. Dataset Antarc* Antarctic Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Antarctic East Antarctic Ice Sheet New Zealand Pacific |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Chronozone Sample code/label DEPTH, sediment/rock Depth, composite revised Age model Age model, optional Age, difference Drilling/drill rig DSDP/ODP/IODP sample designation Age model, Berggren et al 1995 BKSA95 Leg181 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Chronozone Sample code/label DEPTH, sediment/rock Depth, composite revised Age model Age model, optional Age, difference Drilling/drill rig DSDP/ODP/IODP sample designation Age model, Berggren et al 1995 BKSA95 Leg181 Joides Resolution Ocean Drilling Program ODP Hall, Ian R McCave, I Nick Zahn, Rainer Carter, Lionel Knutz, Paul Cornils Weedon, Graham P (Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040 |
topic_facet |
Chronozone Sample code/label DEPTH, sediment/rock Depth, composite revised Age model Age model, optional Age, difference Drilling/drill rig DSDP/ODP/IODP sample designation Age model, Berggren et al 1995 BKSA95 Leg181 Joides Resolution Ocean Drilling Program ODP |
description |
Today the deep western boundary current (DWBC) east of New Zealand is the most important route for deep water entering the Pacific Ocean. Large-scale changes in deep water circulation patterns are thought to have been associated with the development of the East Antarctic Ice Sheet (EAIS) close to the main source of bottom water for the DWBC. Here we reconstruct the changing speed of the southwest Pacific DWBC during the middle Miocene from ~15.5-12.5 Ma, a period of significant global ice accumulation associated with EAIS growth. Sortable silt mean grain sizes from Ocean Drilling Program Site 1123 reveal variability in the speed of the Pacific inflow on the timescale of the 41 kyr orbital obliquity cycle. Similar orbital period flow changes have recently been demonstrated for the Pleistocene epoch. Collectively, these observations suggest that a strong coupling between changes in the speed of the deep Pacific inflow and high-latitude climate forcing may have been a persistent feature of the global thermohaline circulation system for at least the past 15 Myr. Furthermore, long-term changes in flow speed suggest an intensification of the DWBC under an inferred increase in Southern Component Water production. This occurred at the same time as decreasing Tethyan outflow and major EAIS growth between ~15.5 and 13.5 Ma. These results provide evidence that a major component of the deep thermohaline circulation was associated with the middle Miocene growth of the EAIS and support the view that this time interval represents an important step in the development of the Neogene icehouse climate. : DEPTH, sediment/rock [m] is given in mbsf. |
format |
Dataset |
author |
Hall, Ian R McCave, I Nick Zahn, Rainer Carter, Lionel Knutz, Paul Cornils Weedon, Graham P |
author_facet |
Hall, Ian R McCave, I Nick Zahn, Rainer Carter, Lionel Knutz, Paul Cornils Weedon, Graham P |
author_sort |
Hall, Ian R |
title |
(Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040 |
title_short |
(Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040 |
title_full |
(Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040 |
title_fullStr |
(Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040 |
title_full_unstemmed |
(Table 1) Age comparison between the GPTS and ODP Site 181-1123 age model for each chron base within the Middle Miocene section, supplement to: Hall, Ian R; McCave, I Nick; Zahn, Rainer; Carter, Lionel; Knutz, Paul Cornils; Weedon, Graham P (2003): Paleocurrent reconstruction of the deep Pacific inflow during the middle Miocene: Reflections of East Antarctic Ice Sheet growth. Paleoceanography, 18(2), 1040 |
title_sort |
(table 1) age comparison between the gpts and odp site 181-1123 age model for each chron base within the middle miocene section, supplement to: hall, ian r; mccave, i nick; zahn, rainer; carter, lionel; knutz, paul cornils; weedon, graham p (2003): paleocurrent reconstruction of the deep pacific inflow during the middle miocene: reflections of east antarctic ice sheet growth. paleoceanography, 18(2), 1040 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2003 |
url |
https://dx.doi.org/10.1594/pangaea.841718 https://doi.pangaea.de/10.1594/PANGAEA.841718 |
geographic |
Antarctic East Antarctic Ice Sheet New Zealand Pacific |
geographic_facet |
Antarctic East Antarctic Ice Sheet New Zealand Pacific |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
https://dx.doi.org/10.1029/2002pa000817 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.841718 https://doi.org/10.1029/2002pa000817 |
_version_ |
1766037569467842560 |