Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica
Core top samples from Indonesian and northeast Atlantic depth transects were used to calibrate Mg/Ca and delta O-18 in tests of the calcitic benthic foraminifer Hyalinea balthica to bottom water temperature between 4 degrees C and 13 degrees C. This shallow infaunal species is primarily abundant in...
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Online Access: | https://doi.org/10.1029/2010GC003333 https://archimer.ifremer.fr/doc/00215/32579/33686.pdf https://archimer.ifremer.fr/doc/00215/32579/ |
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fttriple:oai:gotriple.eu:10670/1.vkwo8q 2023-05-15T17:41:42+02:00 Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica Rosenthal, Yair Morley, Audrey Barras, Christine Katz, Miriam E. Jorissen, Frans Reichart, Gert-jan Oppo, Delia W. Linsley, Braddock K. 2011-04-01 https://doi.org/10.1029/2010GC003333 https://archimer.ifremer.fr/doc/00215/32579/33686.pdf https://archimer.ifremer.fr/doc/00215/32579/ en eng Amer Geophysical Union doi:10.1029/2010GC003333 10670/1.vkwo8q https://archimer.ifremer.fr/doc/00215/32579/33686.pdf https://archimer.ifremer.fr/doc/00215/32579/ other Archimer, archive institutionnelle de l'Ifremer Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2011-04-01 , Vol. 12 , N. 4 , P. 1-17 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2011 fttriple https://doi.org/10.1029/2010GC003333 2023-01-22T17:56:47Z Core top samples from Indonesian and northeast Atlantic depth transects were used to calibrate Mg/Ca and delta O-18 in tests of the calcitic benthic foraminifer Hyalinea balthica to bottom water temperature between 4 degrees C and 13 degrees C. This shallow infaunal species is primarily abundant in neritic to upper bathyal sediments (< 600 m). Both linear and exponential calibrations suggest a temperature sensitivity of similar to 12% per degrees C that is similar to 4 times higher than observed in other species of deep-sea benthic foraminifera. Culture experiments support the core top calibration. We find no discernible effect of salinity and saturation on Mg/Ca. Comparison between the measured benthic foraminiferal delta O-18 and predicted equilibrium values suggests that on average H. balthica delta O-18 is 0.64 parts per thousand similar to 0.13 parts per thousand lower than predicted from the equilibrium composition. To test the reliability of using paired H. balthica Mg/Ca and delta O-18 measurements for reconstructing seawater delta O-18(sw) and salinity, we apply this calibration to another depth transect from Cape Ghir off NW Africa, which was not included in the calibration. Based on error analysis of the calibration data and this validation test, we show that the uncertainty of reconstructing bottom water temperature and salinity from paired Mg/Ca and delta O-18 measurements of H. balthica is better than +/- 0.7 degrees C and +/- 0.69 practical salinity scale, respectively. The small uncertainties allow for the reconstruction of seawater density to better than 0.3 sigma(theta) units, which is precise enough for the identification of specific water masses and reconstruction of changes in their properties. We propose that the relatively high Mg content and temperature sensitivity of H. balthica might be due to minor, biologically mediated contribution of high-Mg calcite to the primarily low Mg calcite test, which is influenced by the ambient temperature. This hypothesis, if correct, suggests that ... Text Northeast Atlantic Unknown Geochemistry, Geophysics, Geosystems 12 4 n/a n/a |
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envir geo Rosenthal, Yair Morley, Audrey Barras, Christine Katz, Miriam E. Jorissen, Frans Reichart, Gert-jan Oppo, Delia W. Linsley, Braddock K. Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica |
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description |
Core top samples from Indonesian and northeast Atlantic depth transects were used to calibrate Mg/Ca and delta O-18 in tests of the calcitic benthic foraminifer Hyalinea balthica to bottom water temperature between 4 degrees C and 13 degrees C. This shallow infaunal species is primarily abundant in neritic to upper bathyal sediments (< 600 m). Both linear and exponential calibrations suggest a temperature sensitivity of similar to 12% per degrees C that is similar to 4 times higher than observed in other species of deep-sea benthic foraminifera. Culture experiments support the core top calibration. We find no discernible effect of salinity and saturation on Mg/Ca. Comparison between the measured benthic foraminiferal delta O-18 and predicted equilibrium values suggests that on average H. balthica delta O-18 is 0.64 parts per thousand similar to 0.13 parts per thousand lower than predicted from the equilibrium composition. To test the reliability of using paired H. balthica Mg/Ca and delta O-18 measurements for reconstructing seawater delta O-18(sw) and salinity, we apply this calibration to another depth transect from Cape Ghir off NW Africa, which was not included in the calibration. Based on error analysis of the calibration data and this validation test, we show that the uncertainty of reconstructing bottom water temperature and salinity from paired Mg/Ca and delta O-18 measurements of H. balthica is better than +/- 0.7 degrees C and +/- 0.69 practical salinity scale, respectively. The small uncertainties allow for the reconstruction of seawater density to better than 0.3 sigma(theta) units, which is precise enough for the identification of specific water masses and reconstruction of changes in their properties. We propose that the relatively high Mg content and temperature sensitivity of H. balthica might be due to minor, biologically mediated contribution of high-Mg calcite to the primarily low Mg calcite test, which is influenced by the ambient temperature. This hypothesis, if correct, suggests that ... |
format |
Text |
author |
Rosenthal, Yair Morley, Audrey Barras, Christine Katz, Miriam E. Jorissen, Frans Reichart, Gert-jan Oppo, Delia W. Linsley, Braddock K. |
author_facet |
Rosenthal, Yair Morley, Audrey Barras, Christine Katz, Miriam E. Jorissen, Frans Reichart, Gert-jan Oppo, Delia W. Linsley, Braddock K. |
author_sort |
Rosenthal, Yair |
title |
Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica |
title_short |
Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica |
title_full |
Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica |
title_fullStr |
Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica |
title_full_unstemmed |
Temperature calibration of Mg/Ca ratios in the intermediate water benthic foraminifer Hyalinea balthica |
title_sort |
temperature calibration of mg/ca ratios in the intermediate water benthic foraminifer hyalinea balthica |
publisher |
Amer Geophysical Union |
publishDate |
2011 |
url |
https://doi.org/10.1029/2010GC003333 https://archimer.ifremer.fr/doc/00215/32579/33686.pdf https://archimer.ifremer.fr/doc/00215/32579/ |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Archimer, archive institutionnelle de l'Ifremer Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2011-04-01 , Vol. 12 , N. 4 , P. 1-17 |
op_relation |
doi:10.1029/2010GC003333 10670/1.vkwo8q https://archimer.ifremer.fr/doc/00215/32579/33686.pdf https://archimer.ifremer.fr/doc/00215/32579/ |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2010GC003333 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
12 |
container_issue |
4 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766143397105500160 |