Boron isotope and B/Ca ratios of planktonic foraminifera
Here a new analytical methodology is described for measuring the isotopic composition of boron in foraminifera using multicollector inductively coupled plasma mass spectrometry (MC-ICPMS). This new approach is fast (~10 samples analysed in duplicate per analytical session) and accurate (to better th...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.716666 2023-05-15T17:37:11+02:00 Boron isotope and B/Ca ratios of planktonic foraminifera Foster, Gavin L MEDIAN LATITUDE: 11.344770 * MEDIAN LONGITUDE: -37.747944 * SOUTH-BOUND LATITUDE: -24.493333 * WEST-BOUND LONGITUDE: -110.571800 * NORTH-BOUND LATITUDE: 58.001000 * EAST-BOUND LONGITUDE: 159.361000 * DATE/TIME START: 1986-03-31T00:00:00 * DATE/TIME END: 1996-12-10T13:22:00 2008-05-27 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.716666 https://doi.org/10.1594/PANGAEA.716666 en eng PANGAEA Foster, Gavin L (2009): Erratum to “Seawater pH, pCO2 and [CO2-3] variations in the Caribbean Sea over the last 130 kyr: A boron isotope and B/Ca study of planktic foraminifera” (doi:10.1016/j.epsl.2008.04.015). Earth and Planetary Science Letters, 277(1-2), 290-291, https://doi.org/10.1016/j.epsl.2008.10.001 https://doi.pangaea.de/10.1594/PANGAEA.716666 https://doi.org/10.1594/PANGAEA.716666 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Foster, Gavin L (2008): Seawater pH, pCO2 and [CO3 [2-] ] variations in the Caribbean Sea over the last 130 kyr: A boron isotope and B/Ca study of planktic foraminifera. Earth and Planetary Science Letters, 271(1-4), 254-266, https://doi.org/10.1016/j.epsl.2008.04.015 108-664C 108-668B 130-806A 138-847B 138-851B 154-925B 165-999A Agadir Canyon BOFS11891#4 BOFS11905#1 BOFS11K BOFS17K Cape Basin Caribbean Sea D184 Discovery (1962) DRILL Drilling/drill rig GeoB1208-2 GeoB4216-1 Gravity corer (Kiel type) Joides Resolution KAL Kasten corer Leg108 Leg130 Leg138 Leg154 Leg165 M12/1 M37/1 Meteor (1986) North Atlantic Ocean Northeast Atlantic North Pacific Ocean Ocean Drilling Program ODP SL Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.716666 https://doi.org/10.1016/j.epsl.2008.04.015 2023-01-20T07:31:24Z Here a new analytical methodology is described for measuring the isotopic composition of boron in foraminifera using multicollector inductively coupled plasma mass spectrometry (MC-ICPMS). This new approach is fast (~10 samples analysed in duplicate per analytical session) and accurate (to better than 0.25 per mil at 95% confidence) with acceptable sample size requirements (1-3 mg of carbonate). A core top calibration of several common planktic and two benthic species from geographically widespread localities shows a very close agreement between the isotopic composition measured by MC-ICPMS and the isotopic composition of B(OH)-4 in seawater (as predicted using the recently measured isotopic equilibrium factor of 1.0272) at the depth of habitat. A down core and core top investigation of boron concentration (B/Ca ratio) shows that the partition coefficient is influenced by [CO2-3] complicating the application of this proxy. Nevertheless, it is demonstrated that these two proxies can be used to fully constrain the carbonate system of surface water in the Caribbean Sea (ODP Site 999A) over the last 130 kyr. This reconstruction shows that during much of the Holocene and the last interglacial period surface water at Site 999A was in equilibrium with the atmosphere with respect to CO2. During the intervening colder periods although the surface water pCO2 was lower than the Holocene, it was a minor to significant source of CO2 to the atmosphere possibly due to either an expansion of the eastern equatorial Atlantic upwelling zone, or a more local expansion of coastal upwelling in the southern Caribbean. Such reorganisation of the oceanic carbonate system in favour of a larger source of CO2 to the atmosphere from the equatorial ocean may require mechanisms responsible for lowering atmospheric CO2 during glacial periods to be more efficient than previously supposed. Dataset North Atlantic Northeast Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-110.571800,159.361000,58.001000,-24.493333) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
108-664C 108-668B 130-806A 138-847B 138-851B 154-925B 165-999A Agadir Canyon BOFS11891#4 BOFS11905#1 BOFS11K BOFS17K Cape Basin Caribbean Sea D184 Discovery (1962) DRILL Drilling/drill rig GeoB1208-2 GeoB4216-1 Gravity corer (Kiel type) Joides Resolution KAL Kasten corer Leg108 Leg130 Leg138 Leg154 Leg165 M12/1 M37/1 Meteor (1986) North Atlantic Ocean Northeast Atlantic North Pacific Ocean Ocean Drilling Program ODP SL |
spellingShingle |
108-664C 108-668B 130-806A 138-847B 138-851B 154-925B 165-999A Agadir Canyon BOFS11891#4 BOFS11905#1 BOFS11K BOFS17K Cape Basin Caribbean Sea D184 Discovery (1962) DRILL Drilling/drill rig GeoB1208-2 GeoB4216-1 Gravity corer (Kiel type) Joides Resolution KAL Kasten corer Leg108 Leg130 Leg138 Leg154 Leg165 M12/1 M37/1 Meteor (1986) North Atlantic Ocean Northeast Atlantic North Pacific Ocean Ocean Drilling Program ODP SL Foster, Gavin L Boron isotope and B/Ca ratios of planktonic foraminifera |
topic_facet |
108-664C 108-668B 130-806A 138-847B 138-851B 154-925B 165-999A Agadir Canyon BOFS11891#4 BOFS11905#1 BOFS11K BOFS17K Cape Basin Caribbean Sea D184 Discovery (1962) DRILL Drilling/drill rig GeoB1208-2 GeoB4216-1 Gravity corer (Kiel type) Joides Resolution KAL Kasten corer Leg108 Leg130 Leg138 Leg154 Leg165 M12/1 M37/1 Meteor (1986) North Atlantic Ocean Northeast Atlantic North Pacific Ocean Ocean Drilling Program ODP SL |
description |
Here a new analytical methodology is described for measuring the isotopic composition of boron in foraminifera using multicollector inductively coupled plasma mass spectrometry (MC-ICPMS). This new approach is fast (~10 samples analysed in duplicate per analytical session) and accurate (to better than 0.25 per mil at 95% confidence) with acceptable sample size requirements (1-3 mg of carbonate). A core top calibration of several common planktic and two benthic species from geographically widespread localities shows a very close agreement between the isotopic composition measured by MC-ICPMS and the isotopic composition of B(OH)-4 in seawater (as predicted using the recently measured isotopic equilibrium factor of 1.0272) at the depth of habitat. A down core and core top investigation of boron concentration (B/Ca ratio) shows that the partition coefficient is influenced by [CO2-3] complicating the application of this proxy. Nevertheless, it is demonstrated that these two proxies can be used to fully constrain the carbonate system of surface water in the Caribbean Sea (ODP Site 999A) over the last 130 kyr. This reconstruction shows that during much of the Holocene and the last interglacial period surface water at Site 999A was in equilibrium with the atmosphere with respect to CO2. During the intervening colder periods although the surface water pCO2 was lower than the Holocene, it was a minor to significant source of CO2 to the atmosphere possibly due to either an expansion of the eastern equatorial Atlantic upwelling zone, or a more local expansion of coastal upwelling in the southern Caribbean. Such reorganisation of the oceanic carbonate system in favour of a larger source of CO2 to the atmosphere from the equatorial ocean may require mechanisms responsible for lowering atmospheric CO2 during glacial periods to be more efficient than previously supposed. |
format |
Dataset |
author |
Foster, Gavin L |
author_facet |
Foster, Gavin L |
author_sort |
Foster, Gavin L |
title |
Boron isotope and B/Ca ratios of planktonic foraminifera |
title_short |
Boron isotope and B/Ca ratios of planktonic foraminifera |
title_full |
Boron isotope and B/Ca ratios of planktonic foraminifera |
title_fullStr |
Boron isotope and B/Ca ratios of planktonic foraminifera |
title_full_unstemmed |
Boron isotope and B/Ca ratios of planktonic foraminifera |
title_sort |
boron isotope and b/ca ratios of planktonic foraminifera |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.716666 https://doi.org/10.1594/PANGAEA.716666 |
op_coverage |
MEDIAN LATITUDE: 11.344770 * MEDIAN LONGITUDE: -37.747944 * SOUTH-BOUND LATITUDE: -24.493333 * WEST-BOUND LONGITUDE: -110.571800 * NORTH-BOUND LATITUDE: 58.001000 * EAST-BOUND LONGITUDE: 159.361000 * DATE/TIME START: 1986-03-31T00:00:00 * DATE/TIME END: 1996-12-10T13:22:00 |
long_lat |
ENVELOPE(-110.571800,159.361000,58.001000,-24.493333) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic Northeast Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Northeast Atlantic Planktonic foraminifera |
op_source |
Supplement to: Foster, Gavin L (2008): Seawater pH, pCO2 and [CO3 [2-] ] variations in the Caribbean Sea over the last 130 kyr: A boron isotope and B/Ca study of planktic foraminifera. Earth and Planetary Science Letters, 271(1-4), 254-266, https://doi.org/10.1016/j.epsl.2008.04.015 |
op_relation |
Foster, Gavin L (2009): Erratum to “Seawater pH, pCO2 and [CO2-3] variations in the Caribbean Sea over the last 130 kyr: A boron isotope and B/Ca study of planktic foraminifera” (doi:10.1016/j.epsl.2008.04.015). Earth and Planetary Science Letters, 277(1-2), 290-291, https://doi.org/10.1016/j.epsl.2008.10.001 https://doi.pangaea.de/10.1594/PANGAEA.716666 https://doi.org/10.1594/PANGAEA.716666 |
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.716666 https://doi.org/10.1016/j.epsl.2008.04.015 |
_version_ |
1766136965337448448 |