Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A
The delta18O values of planktonic foraminifera increased in the Caribbean by about 0.5‰ relative to the equatorial East Pacific values between 4.6 and 4.2 Ma as a consequence of the closure of the Central American Gateway (CAG). This increase in delta18O can be interpreted either as an increase in C...
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Language: | English |
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PANGAEA
2004
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.547745 https://doi.org/10.1594/PANGAEA.547745 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.547745 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
165-999A AGE Calculated see reference(s) Calculated from d44/40 Ca (Nägler et al. 2000) Calculated from Mg/Ca ratios (Nürnberg et al. 1996) Caribbean Sea Center for Marine Environmental Sciences Depth composite sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer δ18O ICP-OES Jobin Yvon JY 170 Ultratrace Intercore correlation Isotope ratio mass spectrometry Joides Resolution Leg165 Magnesium/Calcium ratio MARUM Mass Mass spectrometer Finnigan MAT 262 RPQ Plus Ocean Drilling Program ODP Sample code/label Sea surface salinity Sea surface temperature annual mean Strontium/Calcium ratio temperature contribution water δ44/40 Ca |
spellingShingle |
165-999A AGE Calculated see reference(s) Calculated from d44/40 Ca (Nägler et al. 2000) Calculated from Mg/Ca ratios (Nürnberg et al. 1996) Caribbean Sea Center for Marine Environmental Sciences Depth composite sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer δ18O ICP-OES Jobin Yvon JY 170 Ultratrace Intercore correlation Isotope ratio mass spectrometry Joides Resolution Leg165 Magnesium/Calcium ratio MARUM Mass Mass spectrometer Finnigan MAT 262 RPQ Plus Ocean Drilling Program ODP Sample code/label Sea surface salinity Sea surface temperature annual mean Strontium/Calcium ratio temperature contribution water δ44/40 Ca Gussone, Nikolaus Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A |
topic_facet |
165-999A AGE Calculated see reference(s) Calculated from d44/40 Ca (Nägler et al. 2000) Calculated from Mg/Ca ratios (Nürnberg et al. 1996) Caribbean Sea Center for Marine Environmental Sciences Depth composite sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer δ18O ICP-OES Jobin Yvon JY 170 Ultratrace Intercore correlation Isotope ratio mass spectrometry Joides Resolution Leg165 Magnesium/Calcium ratio MARUM Mass Mass spectrometer Finnigan MAT 262 RPQ Plus Ocean Drilling Program ODP Sample code/label Sea surface salinity Sea surface temperature annual mean Strontium/Calcium ratio temperature contribution water δ44/40 Ca |
description |
The delta18O values of planktonic foraminifera increased in the Caribbean by about 0.5‰ relative to the equatorial East Pacific values between 4.6 and 4.2 Ma as a consequence of the closure of the Central American Gateway (CAG). This increase in delta18O can be interpreted either as an increase in Caribbean sea surface (mixed layer) salinity (SSS) or as a decrease in sea surface temperatures (SST). This problem represents an ideal situation to apply the recently developed paleotemperature proxy delta44/40Ca together with Mg/Ca and d18O on the planktic foraminifer Globigerinoides sacculifer from ODP Site 999. Although differences in absolute temperature calibration of delta44/40Ca and Mg/Ca exist, the general pattern is similar indicating a SST decrease of about 2-3 8C between 4.4 and 4.3 Ma followed by an increase in the same order of magnitude between 4.3 and 4.0 Ma. Correcting the delta18O record for this temperature change and assuming that changes in global ice volume are negligible, the salinity-induced planktonic delta18O signal decreased by about 0.4‰ between 4.4 and 4.3 Ma and increased by about 0.9‰ between 4.3 and 4.0 Ma in the Caribbean. The observed temperature and salinity trends are interpreted to reflect the restricted exchange of surface water between the Caribbean and the Pacific in response to the shoaling of the Panamanian Seaway, possibly accompanied by a southward shift of the Intertropical Convergence Zone (ITCZ) between 4.4 and 4.3 Ma. Differences in Mg/Ca- and delta44/40Ca-derived temperatures can be reconciled by corrections for secular variations of the marine Mg/Ca[sw] and delta44/40Ca, a salinity effect on the Mg/Ca ratio and a constant temperature offset of ~2.5 °C between both SST proxy calibrations. |
format |
Dataset |
author |
Gussone, Nikolaus |
author_facet |
Gussone, Nikolaus |
author_sort |
Gussone, Nikolaus |
title |
Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A |
title_short |
Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A |
title_full |
Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A |
title_fullStr |
Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A |
title_full_unstemmed |
Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A |
title_sort |
delta 44/40 ca, mg/ca and sr/ca record of globigerinoides sacculifer and calculated temperatures and salinity changes of odp hole 165-999a |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.547745 https://doi.org/10.1594/PANGAEA.547745 |
op_coverage |
LATITUDE: 12.744000 * LONGITUDE: -78.739300 * DATE/TIME START: 1996-01-10T19:30:00 * DATE/TIME END: 1996-01-14T23:15:00 * MINIMUM DEPTH, sediment/rock: 124.95 m * MAXIMUM DEPTH, sediment/rock: 140.71 m |
long_lat |
ENVELOPE(-78.739300,-78.739300,12.744000,12.744000) |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Gussone, Nikolaus; Eisenhauer, Anton; Tiedemann, Ralf; Haug, Gerald H; Heuser, Alexander; Bock, Barbara; Nägler, Thomas F; Müller, A (2004): Reconstruction of Caribbean Sea surface temperature and salinity fluctuations in response to the Pliocene closure of the Central American gateway and radiative forcing, using d44/40Ca, d18O and Mg/Ca ratios. Earth and Planetary Science Letters, 227(3-4), 201-214, https://doi.org/10.1016/j.epsl.2004.09.004 |
op_relation |
Haug, Gerald H; Tiedemann, Ralf; Zahn, Rainer; Ravelo, Ana Christina (2001): Role of Panama uplift on oceanic freshwater balance. Geology, 29(3), 207-210, https://doi.org/10.1130/0091-7613(2001)029%3C0207:ROPUOO%3E2.0.CO;2 https://doi.pangaea.de/10.1594/PANGAEA.547745 https://doi.org/10.1594/PANGAEA.547745 |
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.54774510.1016/j.epsl.2004.09.00410.1130/0091-7613(2001)029%3C0207:ROPUOO%3E2.0.CO;2 |
_version_ |
1810472749172260864 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.547745 2024-09-15T18:31:08+00:00 Delta 44/40 Ca, Mg/Ca and Sr/Ca record of Globigerinoides sacculifer and calculated temperatures and salinity changes of ODP Hole 165-999A Gussone, Nikolaus LATITUDE: 12.744000 * LONGITUDE: -78.739300 * DATE/TIME START: 1996-01-10T19:30:00 * DATE/TIME END: 1996-01-14T23:15:00 * MINIMUM DEPTH, sediment/rock: 124.95 m * MAXIMUM DEPTH, sediment/rock: 140.71 m 2004 text/tab-separated-values, 332 data points https://doi.pangaea.de/10.1594/PANGAEA.547745 https://doi.org/10.1594/PANGAEA.547745 en eng PANGAEA Haug, Gerald H; Tiedemann, Ralf; Zahn, Rainer; Ravelo, Ana Christina (2001): Role of Panama uplift on oceanic freshwater balance. Geology, 29(3), 207-210, https://doi.org/10.1130/0091-7613(2001)029%3C0207:ROPUOO%3E2.0.CO;2 https://doi.pangaea.de/10.1594/PANGAEA.547745 https://doi.org/10.1594/PANGAEA.547745 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Gussone, Nikolaus; Eisenhauer, Anton; Tiedemann, Ralf; Haug, Gerald H; Heuser, Alexander; Bock, Barbara; Nägler, Thomas F; Müller, A (2004): Reconstruction of Caribbean Sea surface temperature and salinity fluctuations in response to the Pliocene closure of the Central American gateway and radiative forcing, using d44/40Ca, d18O and Mg/Ca ratios. Earth and Planetary Science Letters, 227(3-4), 201-214, https://doi.org/10.1016/j.epsl.2004.09.004 165-999A AGE Calculated see reference(s) Calculated from d44/40 Ca (Nägler et al. 2000) Calculated from Mg/Ca ratios (Nürnberg et al. 1996) Caribbean Sea Center for Marine Environmental Sciences Depth composite sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer δ18O ICP-OES Jobin Yvon JY 170 Ultratrace Intercore correlation Isotope ratio mass spectrometry Joides Resolution Leg165 Magnesium/Calcium ratio MARUM Mass Mass spectrometer Finnigan MAT 262 RPQ Plus Ocean Drilling Program ODP Sample code/label Sea surface salinity Sea surface temperature annual mean Strontium/Calcium ratio temperature contribution water δ44/40 Ca dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.54774510.1016/j.epsl.2004.09.00410.1130/0091-7613(2001)029%3C0207:ROPUOO%3E2.0.CO;2 2024-07-24T02:31:27Z The delta18O values of planktonic foraminifera increased in the Caribbean by about 0.5‰ relative to the equatorial East Pacific values between 4.6 and 4.2 Ma as a consequence of the closure of the Central American Gateway (CAG). This increase in delta18O can be interpreted either as an increase in Caribbean sea surface (mixed layer) salinity (SSS) or as a decrease in sea surface temperatures (SST). This problem represents an ideal situation to apply the recently developed paleotemperature proxy delta44/40Ca together with Mg/Ca and d18O on the planktic foraminifer Globigerinoides sacculifer from ODP Site 999. Although differences in absolute temperature calibration of delta44/40Ca and Mg/Ca exist, the general pattern is similar indicating a SST decrease of about 2-3 8C between 4.4 and 4.3 Ma followed by an increase in the same order of magnitude between 4.3 and 4.0 Ma. Correcting the delta18O record for this temperature change and assuming that changes in global ice volume are negligible, the salinity-induced planktonic delta18O signal decreased by about 0.4‰ between 4.4 and 4.3 Ma and increased by about 0.9‰ between 4.3 and 4.0 Ma in the Caribbean. The observed temperature and salinity trends are interpreted to reflect the restricted exchange of surface water between the Caribbean and the Pacific in response to the shoaling of the Panamanian Seaway, possibly accompanied by a southward shift of the Intertropical Convergence Zone (ITCZ) between 4.4 and 4.3 Ma. Differences in Mg/Ca- and delta44/40Ca-derived temperatures can be reconciled by corrections for secular variations of the marine Mg/Ca[sw] and delta44/40Ca, a salinity effect on the Mg/Ca ratio and a constant temperature offset of ~2.5 °C between both SST proxy calibrations. Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-78.739300,-78.739300,12.744000,12.744000) |