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 Wa...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union (AGU)
2022
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Online Access: | https://epic.awi.de/id/eprint/57688/ https://epic.awi.de/id/eprint/57688/1/Reyes-Macaya_etal_2021.pdf https://hdl.handle.net/10013/epic.da303bed-320d-4852-afdf-0572f39841d1 |
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ftawi:oai:epic.awi.de:57688 2024-03-24T08:56:55+00:00 Isotopic Characterization of Water Masses in the Southeast Pacific Region: Paleoceanographic Implications Reyes‐Macaya, Dharma Hoogakker, Babette Martinez Mendez, 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 2022-01-20 application/pdf https://epic.awi.de/id/eprint/57688/ https://epic.awi.de/id/eprint/57688/1/Reyes-Macaya_etal_2021.pdf https://hdl.handle.net/10013/epic.da303bed-320d-4852-afdf-0572f39841d1 unknown American Geophysical Union (AGU) https://epic.awi.de/id/eprint/57688/1/Reyes-Macaya_etal_2021.pdf Reyes‐Macaya, D. , Hoogakker, B. , Martinez Mendez, G. , Llanillo, P. J. orcid:0000-0002-9308-501X , 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 , Journal of Geophysical Research - Oceans, 127 (1) . doi:10.1029/2021jc017525 <https://doi.org/10.1029/2021jc017525> , hdl:10013/epic.da303bed-320d-4852-afdf-0572f39841d1 EPIC3Journal of Geophysical Research - Oceans, American Geophysical Union (AGU), 127(1), ISSN: 2169-9275 Article peerRev 2022 ftawi https://doi.org/10.1029/2021jc017525 2024-02-27T09:55:26Z 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 1,000 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Pacific Journal of Geophysical Research: Oceans 127 1 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 1,000 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 Martinez Mendez, 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 Martinez Mendez, 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 Martinez Mendez, 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 |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/57688/ https://epic.awi.de/id/eprint/57688/1/Reyes-Macaya_etal_2021.pdf https://hdl.handle.net/10013/epic.da303bed-320d-4852-afdf-0572f39841d1 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
EPIC3Journal of Geophysical Research - Oceans, American Geophysical Union (AGU), 127(1), ISSN: 2169-9275 |
op_relation |
https://epic.awi.de/id/eprint/57688/1/Reyes-Macaya_etal_2021.pdf Reyes‐Macaya, D. , Hoogakker, B. , Martinez Mendez, G. , Llanillo, P. J. orcid:0000-0002-9308-501X , 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 , Journal of Geophysical Research - Oceans, 127 (1) . doi:10.1029/2021jc017525 <https://doi.org/10.1029/2021jc017525> , hdl:10013/epic.da303bed-320d-4852-afdf-0572f39841d1 |
op_doi |
https://doi.org/10.1029/2021jc017525 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
127 |
container_issue |
1 |
_version_ |
1794405129727770624 |