Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications
In this study, we used stable isotopes of oxygen (δ18O), deuterium (δD), and dissolved inorganic carbon (δ13CDIC) in combination with temperature, salinity, oxygen and nutrient concentrations to characterize the coastal (71-78 °W) and an oceanic (82-98 °W) water masses (SAAW-Subantarctic Surface Wat...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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AGU (American Geophysical Union)
2022
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Online Access: | https://oceanrep.geomar.de/id/eprint/54712/ https://oceanrep.geomar.de/id/eprint/54712/5/Reyes_Macaya_Grasse_2022%20.pdf https://oceanrep.geomar.de/id/eprint/54712/2/2021jc017525-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/54712/3/2021jc017525-sup-0002-supporting https://oceanrep.geomar.de/id/eprint/54712/4/2021jc017525-sup-0003-data https://doi.org/10.1029/2021JC017525 |
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ftoceanrep:oai:oceanrep.geomar.de:54712 2024-02-11T09:56:18+01:00 Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications Reyes Macaya, Dharma Hoogakker, Babette Martínez﹣Méndez, Gema Llanillo, Pedro J. Grasse, Patricia Mohtadi, Mahyar Mix, Alan Leng, Melanie J Struck, Ulrich McCorkle, Daniel C. Troncoso, Macarena Gayo, Eugenia M Lange, Carina B. Farias, Laura Carhuapoma, Wilson Graco, Michelle Cornejo﹣D’Ottone, Marcela De Pol Holz, Ricardo Fernandez, Camila Narvaez, Diego Vargas, Cristian A. García‐Araya, Francisco Hebbeln, Dierk 2022-01 text https://oceanrep.geomar.de/id/eprint/54712/ https://oceanrep.geomar.de/id/eprint/54712/5/Reyes_Macaya_Grasse_2022%20.pdf https://oceanrep.geomar.de/id/eprint/54712/2/2021jc017525-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/54712/3/2021jc017525-sup-0002-supporting https://oceanrep.geomar.de/id/eprint/54712/4/2021jc017525-sup-0003-data https://doi.org/10.1029/2021JC017525 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/54712/5/Reyes_Macaya_Grasse_2022%20.pdf https://oceanrep.geomar.de/id/eprint/54712/2/2021jc017525-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/54712/3/2021jc017525-sup-0002-supporting https://oceanrep.geomar.de/id/eprint/54712/4/2021jc017525-sup-0003-data Reyes Macaya, D., Hoogakker, B., Martínez﹣Méndez, G., Llanillo, P. J., Grasse, P. , Mohtadi, M., Mix, A., Leng, M. J., Struck, U., McCorkle, D. C., Troncoso, M., Gayo, E. M., Lange, C. B., Farias, L., Carhuapoma, W., Graco, M., Cornejo﹣D’Ottone, M., De Pol Holz, R., Fernandez, C., Narvaez, D., Vargas, C. A., García‐Araya, F. and Hebbeln, D. (2022) Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications. Open Access Journal of Geophysical Research: Oceans, 127 (1). e2021JC017525. DOI 10.1029/2021JC017525 <https://doi.org/10.1029/2021JC017525>. doi:10.1029/2021JC017525 cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1029/2021JC017525 2024-01-15T00:24:50Z In this study, we used stable isotopes of oxygen (δ18O), deuterium (δD), and dissolved inorganic carbon (δ13CDIC) in combination with temperature, salinity, oxygen and nutrient concentrations to characterize the coastal (71-78 °W) and an oceanic (82-98 °W) water masses (SAAW-Subantarctic Surface Water; STW-Subtropical Water; ESSW-Equatorial Subsurface water; AAIW-Antarctic Intermediate Water; PDW-Pacific Deep Water) of the Southeast Pacific (SEP). The results show that δ18O and δD can be used to differentiate between SAAW-STW, SAAW-ESSW and ESSW-AAIW. δ13CDIC signatures can be used to differentiate between STW-ESSW (oceanic section), SAAW-ESSW, ESSW-AAIW and AAIW-PDW. Compared with the oceanic section, our new coastal section highlights differences in both the chemistry and geometry of water masses above 1000 m. Previous paleoceanographic studies using marine sediments from the SEP continental margin used the present-day hydrological oceanic transect to compare against, as the coastal section was not sufficiently characterized. We suggest that our new results of the coastal section should be used for past characterizations of the SEP water masses that are usually based on continental margin sediment samples. Article in Journal/Newspaper Antarc* Antarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Pacific Journal of Geophysical Research: Oceans 127 1 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
In this study, we used stable isotopes of oxygen (δ18O), deuterium (δD), and dissolved inorganic carbon (δ13CDIC) in combination with temperature, salinity, oxygen and nutrient concentrations to characterize the coastal (71-78 °W) and an oceanic (82-98 °W) water masses (SAAW-Subantarctic Surface Water; STW-Subtropical Water; ESSW-Equatorial Subsurface water; AAIW-Antarctic Intermediate Water; PDW-Pacific Deep Water) of the Southeast Pacific (SEP). The results show that δ18O and δD can be used to differentiate between SAAW-STW, SAAW-ESSW and ESSW-AAIW. δ13CDIC signatures can be used to differentiate between STW-ESSW (oceanic section), SAAW-ESSW, ESSW-AAIW and AAIW-PDW. Compared with the oceanic section, our new coastal section highlights differences in both the chemistry and geometry of water masses above 1000 m. Previous paleoceanographic studies using marine sediments from the SEP continental margin used the present-day hydrological oceanic transect to compare against, as the coastal section was not sufficiently characterized. We suggest that our new results of the coastal section should be used for past characterizations of the SEP water masses that are usually based on continental margin sediment samples. |
format |
Article in Journal/Newspaper |
author |
Reyes Macaya, Dharma Hoogakker, Babette Martínez﹣Méndez, Gema Llanillo, Pedro J. Grasse, Patricia Mohtadi, Mahyar Mix, Alan Leng, Melanie J Struck, Ulrich McCorkle, Daniel C. Troncoso, Macarena Gayo, Eugenia M Lange, Carina B. Farias, Laura Carhuapoma, Wilson Graco, Michelle Cornejo﹣D’Ottone, Marcela De Pol Holz, Ricardo Fernandez, Camila Narvaez, Diego Vargas, Cristian A. García‐Araya, Francisco Hebbeln, Dierk |
spellingShingle |
Reyes Macaya, Dharma Hoogakker, Babette Martínez﹣Méndez, Gema Llanillo, Pedro J. Grasse, Patricia Mohtadi, Mahyar Mix, Alan Leng, Melanie J Struck, Ulrich McCorkle, Daniel C. Troncoso, Macarena Gayo, Eugenia M Lange, Carina B. Farias, Laura Carhuapoma, Wilson Graco, Michelle Cornejo﹣D’Ottone, Marcela De Pol Holz, Ricardo Fernandez, Camila Narvaez, Diego Vargas, Cristian A. García‐Araya, Francisco Hebbeln, Dierk Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications |
author_facet |
Reyes Macaya, Dharma Hoogakker, Babette Martínez﹣Méndez, Gema Llanillo, Pedro J. Grasse, Patricia Mohtadi, Mahyar Mix, Alan Leng, Melanie J Struck, Ulrich McCorkle, Daniel C. Troncoso, Macarena Gayo, Eugenia M Lange, Carina B. Farias, Laura Carhuapoma, Wilson Graco, Michelle Cornejo﹣D’Ottone, Marcela De Pol Holz, Ricardo Fernandez, Camila Narvaez, Diego Vargas, Cristian A. García‐Araya, Francisco Hebbeln, Dierk |
author_sort |
Reyes Macaya, Dharma |
title |
Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications |
title_short |
Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications |
title_full |
Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications |
title_fullStr |
Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications |
title_full_unstemmed |
Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications |
title_sort |
isotopic characterization of water masses in the southeast pacific region: paleoceanographic implications |
publisher |
AGU (American Geophysical Union) |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/54712/ https://oceanrep.geomar.de/id/eprint/54712/5/Reyes_Macaya_Grasse_2022%20.pdf https://oceanrep.geomar.de/id/eprint/54712/2/2021jc017525-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/54712/3/2021jc017525-sup-0002-supporting https://oceanrep.geomar.de/id/eprint/54712/4/2021jc017525-sup-0003-data https://doi.org/10.1029/2021JC017525 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/54712/5/Reyes_Macaya_Grasse_2022%20.pdf https://oceanrep.geomar.de/id/eprint/54712/2/2021jc017525-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/54712/3/2021jc017525-sup-0002-supporting https://oceanrep.geomar.de/id/eprint/54712/4/2021jc017525-sup-0003-data Reyes Macaya, D., Hoogakker, B., Martínez﹣Méndez, G., Llanillo, P. J., Grasse, P. , Mohtadi, M., Mix, A., Leng, M. J., Struck, U., McCorkle, D. C., Troncoso, M., Gayo, E. M., Lange, C. B., Farias, L., Carhuapoma, W., Graco, M., Cornejo﹣D’Ottone, M., De Pol Holz, R., Fernandez, C., Narvaez, D., Vargas, C. A., García‐Araya, F. and Hebbeln, D. (2022) Isotopic characterization of water masses in the Southeast Pacific region: Paleoceanographic implications. Open Access Journal of Geophysical Research: Oceans, 127 (1). e2021JC017525. DOI 10.1029/2021JC017525 <https://doi.org/10.1029/2021JC017525>. doi:10.1029/2021JC017525 |
op_rights |
cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021JC017525 |
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Journal of Geophysical Research: Oceans |
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127 |
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1 |
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1790602156202524672 |