δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics
Planktonic foraminifera δ18O and Mg/Ca ratios are widely considered as a powerful proxy to reconstruct past seawater-column temperature in coastal upwelling regions. Due to the complexity in the interpretation of planktonic foraminifera δ18O data with respect to past seawater temperatures, temperatu...
Main Authors: | , , , , , , , , , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
2019
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.910309 https://doi.org/10.1594/PANGAEA.910309 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.910309 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.910309 2024-09-15T18:30:48+00:00 δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics Salgueiro, Emilia Voelker, Antje H L Martin, Pamela A Rodrigues, Teresa Zúñiga, D Froján, María de la Granda, Francisco Villacieros-Robineau, Nicolás Alonso-Perez, F Alberto, Ana Rebotim, Andreia González-Álvarez, Raquel Castro, Carmen G Abrantes, Fatima F MEDIAN LATITUDE: 42.209663 * MEDIAN LONGITUDE: -9.363974 * SOUTH-BOUND LATITUDE: 41.551000 * WEST-BOUND LONGITUDE: -10.189200 * NORTH-BOUND LATITUDE: 42.919400 * EAST-BOUND LONGITUDE: -8.979944 * DATE/TIME START: 2006-08-22T06:14:00 * DATE/TIME END: 2012-09-10T00:00:00 2019 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.910309 https://doi.org/10.1594/PANGAEA.910309 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.910309 https://doi.org/10.1594/PANGAEA.910309 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Salgueiro, Emilia; Voelker, Antje H L; Martin, Pamela A; Rodrigues, Teresa; Zúñiga, D; Froján, María; de la Granda, Francisco; Villacieros-Robineau, Nicolás; Alonso-Perez, F; Alberto, Ana; Rebotim, Andreia; González-Álvarez, Raquel; Castro, Carmen G; Abrantes, Fatima F (accepted): δ¹⁸O and Mg/Ca Thermometry in Planktonic Foraminifera: A Multiproxy Approach Toward Tracing Coastal Upwelling Dynamics. Paleoceanography and Paleoclimatology, 35(2), https://doi.org/10.1029/2019PA003726 Alkenone Uk'37 index Mg/Ca Planktonic foraminifera plankton net seasonal upwelling δ18O dataset publication series 2019 ftpangaea https://doi.org/10.1594/PANGAEA.91030910.1029/2019PA003726 2024-07-24T02:31:21Z Planktonic foraminifera δ18O and Mg/Ca ratios are widely considered as a powerful proxy to reconstruct past seawater-column temperature in coastal upwelling regions. Due to the complexity in the interpretation of planktonic foraminifera δ18O data with respect to past seawater temperatures, temperature determination based on the foraminifera shell Mg/Ca ratio is believed to be more accurate. However, scarce Mg/Ca calibration data exists for coastal upwelling regions, resulting in incoherent results of past seawater reconstructions. The current study along the NW Iberia coastal upwelling system intends to define the best Mg/Ca temperature equation for the most representative species of this region (Neogloboquadrina incompta, Globigerina bulloides and Globorotalia inflata). Seawater temperature from δ18O and Mg/Ca of these three planktonic foraminifera species were compared with the surface sediments alkenone derived SST, and with the in-situ temperatures measured at the depths where these foraminifera species currently live and calcify. The equations that better reflect each species calcification depth were selected as our regional equations for δ18O and Mg/Ca temperature reconstructions. The δ18O estimated temperatures for surface sediment specimens were comparable with in-situ seawater-column temperature measurements, whereas the Mg/Ca derived temperatures seem to underestimate in-situ values, in special for G. bulloides from samples affected by stronger coastal upwelling. The G. bulloides δ18O and Mg/Ca estimated temperatures from samples located offshore, further from coastal upwelling influence, are comparable to surface sediment alkenone derived temperatures. Our study shows that in upwelling areas, regional calibration of planktonic foraminifera Mg/Ca temperature equations is necessary for reliable interpretations of high-resolution past temperature variability in these important environments. Other/Unknown Material Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-10.189200,-8.979944,42.919400,41.551000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Alkenone Uk'37 index Mg/Ca Planktonic foraminifera plankton net seasonal upwelling δ18O |
spellingShingle |
Alkenone Uk'37 index Mg/Ca Planktonic foraminifera plankton net seasonal upwelling δ18O Salgueiro, Emilia Voelker, Antje H L Martin, Pamela A Rodrigues, Teresa Zúñiga, D Froján, María de la Granda, Francisco Villacieros-Robineau, Nicolás Alonso-Perez, F Alberto, Ana Rebotim, Andreia González-Álvarez, Raquel Castro, Carmen G Abrantes, Fatima F δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics |
topic_facet |
Alkenone Uk'37 index Mg/Ca Planktonic foraminifera plankton net seasonal upwelling δ18O |
description |
Planktonic foraminifera δ18O and Mg/Ca ratios are widely considered as a powerful proxy to reconstruct past seawater-column temperature in coastal upwelling regions. Due to the complexity in the interpretation of planktonic foraminifera δ18O data with respect to past seawater temperatures, temperature determination based on the foraminifera shell Mg/Ca ratio is believed to be more accurate. However, scarce Mg/Ca calibration data exists for coastal upwelling regions, resulting in incoherent results of past seawater reconstructions. The current study along the NW Iberia coastal upwelling system intends to define the best Mg/Ca temperature equation for the most representative species of this region (Neogloboquadrina incompta, Globigerina bulloides and Globorotalia inflata). Seawater temperature from δ18O and Mg/Ca of these three planktonic foraminifera species were compared with the surface sediments alkenone derived SST, and with the in-situ temperatures measured at the depths where these foraminifera species currently live and calcify. The equations that better reflect each species calcification depth were selected as our regional equations for δ18O and Mg/Ca temperature reconstructions. The δ18O estimated temperatures for surface sediment specimens were comparable with in-situ seawater-column temperature measurements, whereas the Mg/Ca derived temperatures seem to underestimate in-situ values, in special for G. bulloides from samples affected by stronger coastal upwelling. The G. bulloides δ18O and Mg/Ca estimated temperatures from samples located offshore, further from coastal upwelling influence, are comparable to surface sediment alkenone derived temperatures. Our study shows that in upwelling areas, regional calibration of planktonic foraminifera Mg/Ca temperature equations is necessary for reliable interpretations of high-resolution past temperature variability in these important environments. |
format |
Other/Unknown Material |
author |
Salgueiro, Emilia Voelker, Antje H L Martin, Pamela A Rodrigues, Teresa Zúñiga, D Froján, María de la Granda, Francisco Villacieros-Robineau, Nicolás Alonso-Perez, F Alberto, Ana Rebotim, Andreia González-Álvarez, Raquel Castro, Carmen G Abrantes, Fatima F |
author_facet |
Salgueiro, Emilia Voelker, Antje H L Martin, Pamela A Rodrigues, Teresa Zúñiga, D Froján, María de la Granda, Francisco Villacieros-Robineau, Nicolás Alonso-Perez, F Alberto, Ana Rebotim, Andreia González-Álvarez, Raquel Castro, Carmen G Abrantes, Fatima F |
author_sort |
Salgueiro, Emilia |
title |
δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics |
title_short |
δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics |
title_full |
δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics |
title_fullStr |
δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics |
title_full_unstemmed |
δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics |
title_sort |
δ18o and mg/ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.910309 https://doi.org/10.1594/PANGAEA.910309 |
op_coverage |
MEDIAN LATITUDE: 42.209663 * MEDIAN LONGITUDE: -9.363974 * SOUTH-BOUND LATITUDE: 41.551000 * WEST-BOUND LONGITUDE: -10.189200 * NORTH-BOUND LATITUDE: 42.919400 * EAST-BOUND LONGITUDE: -8.979944 * DATE/TIME START: 2006-08-22T06:14:00 * DATE/TIME END: 2012-09-10T00:00:00 |
long_lat |
ENVELOPE(-10.189200,-8.979944,42.919400,41.551000) |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Salgueiro, Emilia; Voelker, Antje H L; Martin, Pamela A; Rodrigues, Teresa; Zúñiga, D; Froján, María; de la Granda, Francisco; Villacieros-Robineau, Nicolás; Alonso-Perez, F; Alberto, Ana; Rebotim, Andreia; González-Álvarez, Raquel; Castro, Carmen G; Abrantes, Fatima F (accepted): δ¹⁸O and Mg/Ca Thermometry in Planktonic Foraminifera: A Multiproxy Approach Toward Tracing Coastal Upwelling Dynamics. Paleoceanography and Paleoclimatology, 35(2), https://doi.org/10.1029/2019PA003726 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.910309 https://doi.org/10.1594/PANGAEA.910309 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.91030910.1029/2019PA003726 |
_version_ |
1810472308224032768 |