(Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A
The middle Miocene Climatic Optimum (17-15 Ma; MCO) is a period of global warmth and relatively high CO2 and is thought to be associated with a significant retreat of the Antarctic Ice Sheet (AIS). We present here a new planktic foraminiferal d11B record from 16.6 to 11.8 Ma from two deep ocean site...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.815855 2024-09-30T14:25:04+00:00 (Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A Foster, Gavin L Lear, Caroline H Rae, James W B MEDIAN LATITUDE: -6.508950 * MEDIAN LONGITUDE: 36.313450 * SOUTH-BOUND LATITUDE: -16.737000 * WEST-BOUND LONGITUDE: -42.908100 * NORTH-BOUND LATITUDE: 3.719100 * EAST-BOUND LONGITUDE: 115.535000 * DATE/TIME START: 1988-07-19T10:00:00 * DATE/TIME END: 1994-02-21T10:30:00 * MINIMUM DEPTH, sediment/rock: 37.3 m * MAXIMUM DEPTH, sediment/rock: 290.8 m 2012 text/tab-separated-values, 342 data points https://doi.pangaea.de/10.1594/PANGAEA.815855 https://doi.org/10.1594/PANGAEA.815855 en eng PANGAEA Horita, Juske; Zimmermann, Heide; Holland, Heinrich D (2002): Chemical evolution of seawater during the Phanerozoic. Geochimica et Cosmochimica Acta, 66(21), 3733-3756, https://doi.org/10.1016/S0016-7037(01)00884-5 https://doi.pangaea.de/10.1594/PANGAEA.815855 https://doi.org/10.1594/PANGAEA.815855 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Foster, Gavin L; Lear, Caroline H; Rae, James W B (2012): The evolution of pCO2, ice volume and climate during the middle Miocene. Earth and Planetary Science Letters, 341-344, 243-254, https://doi.org/10.1016/j.epsl.2012.06.007 122-761B 154-926A AGE Boron Calculated Carbonate ion standard deviation Carbon dioxide partial pressure Cibicidoides mundulus Magnesium/Calcium ratio Cibicidoides wuellerstorfi DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Error Event label Globigerinoides sacculifer ICP-MS Thermo Fisher Scientific Element 2 Joides Resolution Leg122 Leg154 MC-ICP-MS Thermo Fisher Scientific NEPTUN North Atlantic Ocean Ocean Drilling Program ODP pH Sample code/label South Indian Ridge South Indian Ocean Species Standard error Temperature δ11B dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.81585510.1016/j.epsl.2012.06.00710.1016/S0016-7037(01)00884-5 2024-09-18T00:10:44Z The middle Miocene Climatic Optimum (17-15 Ma; MCO) is a period of global warmth and relatively high CO2 and is thought to be associated with a significant retreat of the Antarctic Ice Sheet (AIS). We present here a new planktic foraminiferal d11B record from 16.6 to 11.8 Ma from two deep ocean sites currently in equilibrium with the atmosphere with respect to CO2. These new data demonstrate that the evolution of global climate during the middle Miocene (as reflected by changes in the cyrosphere) was well correlated to variations in the concentration of atmospheric CO2. What is more, within our sampling resolution (~1 sample per 300 kyr) there is no evidence of hysteresis in the response of ice volume to CO2 forcing during the middle Miocene, contrary to what is understood about the Antarctic Ice Sheet from ice sheet modelling studies. In agreement with previous data, we show that absolute levels of CO2 during the MCO were relatively modest (350-400 ppm) and levels either side of the MCO are similar or lower than the pre-industrial (200-260 ppm). These new data imply the presence of either a very dynamic AIS at relatively low CO2 during the middle Miocene or the advance and retreat of significant northern hemisphere ice. Recent drilling on the Antarctic margin and shore based studies indicate significant retreat and advance beyond the modern limits of the AIS did occur during the middle Miocene, but the complete loss of the AIS was unlikely. Consequently, it seems that ice volume and climate variations during the middle Miocene probably involved a more dynamic AIS than the modern but also some component of land-based ice in the northern hemisphere. Dataset Antarc* Antarctic Ice Sheet North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Indian Neptun ENVELOPE(101.100,101.100,-66.150,-66.150) The Antarctic ENVELOPE(-42.908100,115.535000,3.719100,-16.737000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
122-761B 154-926A AGE Boron Calculated Carbonate ion standard deviation Carbon dioxide partial pressure Cibicidoides mundulus Magnesium/Calcium ratio Cibicidoides wuellerstorfi DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Error Event label Globigerinoides sacculifer ICP-MS Thermo Fisher Scientific Element 2 Joides Resolution Leg122 Leg154 MC-ICP-MS Thermo Fisher Scientific NEPTUN North Atlantic Ocean Ocean Drilling Program ODP pH Sample code/label South Indian Ridge South Indian Ocean Species Standard error Temperature δ11B |
spellingShingle |
122-761B 154-926A AGE Boron Calculated Carbonate ion standard deviation Carbon dioxide partial pressure Cibicidoides mundulus Magnesium/Calcium ratio Cibicidoides wuellerstorfi DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Error Event label Globigerinoides sacculifer ICP-MS Thermo Fisher Scientific Element 2 Joides Resolution Leg122 Leg154 MC-ICP-MS Thermo Fisher Scientific NEPTUN North Atlantic Ocean Ocean Drilling Program ODP pH Sample code/label South Indian Ridge South Indian Ocean Species Standard error Temperature δ11B Foster, Gavin L Lear, Caroline H Rae, James W B (Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A |
topic_facet |
122-761B 154-926A AGE Boron Calculated Carbonate ion standard deviation Carbon dioxide partial pressure Cibicidoides mundulus Magnesium/Calcium ratio Cibicidoides wuellerstorfi DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Error Event label Globigerinoides sacculifer ICP-MS Thermo Fisher Scientific Element 2 Joides Resolution Leg122 Leg154 MC-ICP-MS Thermo Fisher Scientific NEPTUN North Atlantic Ocean Ocean Drilling Program ODP pH Sample code/label South Indian Ridge South Indian Ocean Species Standard error Temperature δ11B |
description |
The middle Miocene Climatic Optimum (17-15 Ma; MCO) is a period of global warmth and relatively high CO2 and is thought to be associated with a significant retreat of the Antarctic Ice Sheet (AIS). We present here a new planktic foraminiferal d11B record from 16.6 to 11.8 Ma from two deep ocean sites currently in equilibrium with the atmosphere with respect to CO2. These new data demonstrate that the evolution of global climate during the middle Miocene (as reflected by changes in the cyrosphere) was well correlated to variations in the concentration of atmospheric CO2. What is more, within our sampling resolution (~1 sample per 300 kyr) there is no evidence of hysteresis in the response of ice volume to CO2 forcing during the middle Miocene, contrary to what is understood about the Antarctic Ice Sheet from ice sheet modelling studies. In agreement with previous data, we show that absolute levels of CO2 during the MCO were relatively modest (350-400 ppm) and levels either side of the MCO are similar or lower than the pre-industrial (200-260 ppm). These new data imply the presence of either a very dynamic AIS at relatively low CO2 during the middle Miocene or the advance and retreat of significant northern hemisphere ice. Recent drilling on the Antarctic margin and shore based studies indicate significant retreat and advance beyond the modern limits of the AIS did occur during the middle Miocene, but the complete loss of the AIS was unlikely. Consequently, it seems that ice volume and climate variations during the middle Miocene probably involved a more dynamic AIS than the modern but also some component of land-based ice in the northern hemisphere. |
format |
Dataset |
author |
Foster, Gavin L Lear, Caroline H Rae, James W B |
author_facet |
Foster, Gavin L Lear, Caroline H Rae, James W B |
author_sort |
Foster, Gavin L |
title |
(Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A |
title_short |
(Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A |
title_full |
(Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A |
title_fullStr |
(Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A |
title_full_unstemmed |
(Table S1) Boron isotope and trace element data and reconstructed carbonate system parameters, ODP Holes 122-761B and 154-926A |
title_sort |
(table s1) boron isotope and trace element data and reconstructed carbonate system parameters, odp holes 122-761b and 154-926a |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.815855 https://doi.org/10.1594/PANGAEA.815855 |
op_coverage |
MEDIAN LATITUDE: -6.508950 * MEDIAN LONGITUDE: 36.313450 * SOUTH-BOUND LATITUDE: -16.737000 * WEST-BOUND LONGITUDE: -42.908100 * NORTH-BOUND LATITUDE: 3.719100 * EAST-BOUND LONGITUDE: 115.535000 * DATE/TIME START: 1988-07-19T10:00:00 * DATE/TIME END: 1994-02-21T10:30:00 * MINIMUM DEPTH, sediment/rock: 37.3 m * MAXIMUM DEPTH, sediment/rock: 290.8 m |
long_lat |
ENVELOPE(101.100,101.100,-66.150,-66.150) ENVELOPE(-42.908100,115.535000,3.719100,-16.737000) |
geographic |
Antarctic Indian Neptun The Antarctic |
geographic_facet |
Antarctic Indian Neptun The Antarctic |
genre |
Antarc* Antarctic Ice Sheet North Atlantic |
genre_facet |
Antarc* Antarctic Ice Sheet North Atlantic |
op_source |
Supplement to: Foster, Gavin L; Lear, Caroline H; Rae, James W B (2012): The evolution of pCO2, ice volume and climate during the middle Miocene. Earth and Planetary Science Letters, 341-344, 243-254, https://doi.org/10.1016/j.epsl.2012.06.007 |
op_relation |
Horita, Juske; Zimmermann, Heide; Holland, Heinrich D (2002): Chemical evolution of seawater during the Phanerozoic. Geochimica et Cosmochimica Acta, 66(21), 3733-3756, https://doi.org/10.1016/S0016-7037(01)00884-5 https://doi.pangaea.de/10.1594/PANGAEA.815855 https://doi.org/10.1594/PANGAEA.815855 |
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.81585510.1016/j.epsl.2012.06.00710.1016/S0016-7037(01)00884-5 |
_version_ |
1811643289505366016 |