Mg/Ca ratio of Globorotalia tumida and subsurface temperature reconstruction for ODP Site 130-806
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| Format: | Dataset Open Access |
| Sprache: | en |
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2015
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| author | Ford, Heather L Ravelo, Ana Christina Dekens, Petra S LaRiviere, Jonathan P Wara, Michael W |
| author_facet | Ford, Heather L Ravelo, Ana Christina Dekens, Petra S LaRiviere, Jonathan P Wara, Michael W |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The tropical Pacific thermocline strength, depth, and tilt are critical to tropical mean state and variability. During the early Pliocene (~3.5 to 4.5 Ma), the Eastern Equatorial Pacific (EEP) thermocline was deeper and the cold tongue was warmer than today, which resulted in an mean state with a reduced zonal sea surface temperature gradient, or El Padre. However, it is unclear whether the deep thermocline was a local feature of the EEP or a basin-wide condition with global implications. Our measurements of Mg/Ca of Globorotalia tumida in a western equatorial Pacific site indicate Pliocene subsurface temperatures warmer than today; thus, El Padre included a basin-wide thermocline that was relatively warm, deep, and weakly tilted. At ~4 Ma, thermocline steepening was coupled to cooling of the cold tongue. Since ~4 Ma, the basin-wide thermocline cooled/shoaled gradually, with implications for thermocline feedbacks in tropical dynamics and the interpretation of TEX86-derived temperatures. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_846497 |
| institution | PANGAEA |
| language | en |
| publishDate | 2015 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Mg/Ca ratio of Globorotalia tumida and subsurface temperature reconstruction for ODP Site 130-806 Ford, Heather L Ravelo, Ana Christina Dekens, Petra S LaRiviere, Jonathan P Wara, Michael W 130-806; AGE; Calculated from Mg/Ca ratios (Mohtadi et al. 2011); COMPCORE; Composite Core; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Globorotalia tumida, Magnesium/Calcium ratio; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Joides Resolution; Leg130; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sub-surface temperature The tropical Pacific thermocline strength, depth, and tilt are critical to tropical mean state and variability. During the early Pliocene (~3.5 to 4.5 Ma), the Eastern Equatorial Pacific (EEP) thermocline was deeper and the cold tongue was warmer than today, which resulted in an mean state with a reduced zonal sea surface temperature gradient, or El Padre. However, it is unclear whether the deep thermocline was a local feature of the EEP or a basin-wide condition with global implications. Our measurements of Mg/Ca of Globorotalia tumida in a western equatorial Pacific site indicate Pliocene subsurface temperatures warmer than today; thus, El Padre included a basin-wide thermocline that was relatively warm, deep, and weakly tilted. At ~4 Ma, thermocline steepening was coupled to cooling of the cold tongue. Since ~4 Ma, the basin-wide thermocline cooled/shoaled gradually, with implications for thermocline feedbacks in tropical dynamics and the interpretation of TEX86-derived temperatures. |
| title | Mg/Ca ratio of Globorotalia tumida and subsurface temperature reconstruction for ODP Site 130-806 |
| topic | 130-806; AGE; Calculated from Mg/Ca ratios (Mohtadi et al. 2011); COMPCORE; Composite Core; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Globorotalia tumida, Magnesium/Calcium ratio; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Joides Resolution; Leg130; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sub-surface temperature |
| url | https://doi.org/10.1594/PANGAEA.846497 |