Ai, Xuyuan E; Thöle, Lena M; Auderset, Alexandra; Schmitt, Mareike; Moretti, Simone; Studer, Anja S; Michel, Elisabeth; Wegmann, Martin; Mazaud, Alain; Bijl, Peter K; Sigman, Daniel M; Martínez-García, Alfredo; Jaccard, Samuel L: SST gradient and reconstructed Antarctic Circumpolar Current latitude change in the Southern Indian Ocean over the last 150kyr [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.967639 (dataset in review)
Abstract:
We report a quantitative and continuous record of the ACC latitude over the last glacial-interglacial cycle derived from biomarker-based reconstructions of surface layer temperature gradient in the Southern Indian Ocean. The surface layer temperature gradient is calculated from two downcore surface layer temperature series reconstructed from TEX86L at sediment cores MD11-3353 and MD11-3357 from the Indian Southern Ocean. The TEX86L-temperature calibration function is revised based on the global core-top data compilation of Tierney and Tingley (2015): SST L (0-200m integrated, °C) = 55.84*TEX86L + 38.15. The past ACC latitude is derived using a quantitative framework that simulates the effect of ACC migration on Southern Ocean surface temperature gradient.
Supplement to:
Ai, Xuyuan E; Thöle, Lena M; Auderset, Alexandra; Schmitt, Mareike; Moretti, Simone; Studer, Anja S; Michel, Elisabeth; Wegmann, Martin; Mazaud, Alain; Bijl, Peter K; Sigman, Daniel M; Martínez-García, Alfredo; Jaccard, Samuel L (2024): The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations. Communications Earth & Environment, 5(1), 58, https://doi.org/10.1038/s43247-024-01216-x
Funding:
European Commission (EC), grant/award no. 802835: Paleoceanography of the Ice-proximal Southern Ocean during Past Warm Climates (OceaNice)
Swiss National Science Foundation (SNF), grant/award no. 144811: SeaO2 - Past changes in Southern Ocean overturning circulation - implications for the partitioning of carbon and oxygen between the ocean and the atmosphere
Swiss National Science Foundation (SNF), grant/award no. 168625: Southern Ocean Paleoceanography and glacial-interglacial changes in the efficiency of the biological pump
Swiss National Science Foundation (SNF), grant/award no. 172915: SeaO2 - Past changes in Southern Ocean overturning circulation - implications for the partitioning of carbon and oxygen between the ocean and the atmosphere
Coverage:
Median Latitude: -47.623500 * Median Longitude: 74.407500 * South-bound Latitude: -50.567000 * West-bound Longitude: 68.385000 * North-bound Latitude: -44.680000 * East-bound Longitude: 80.430000
Date/Time Start: 2011-01-30T00:00:00 * Date/Time End: 2011-02-08T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
3 datasets
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Datasets listed in this bundled publication
- Ai, XE; Thöle, LM; Auderset, A et al. (in review): GDGT indices and revised SST L of sediment cores MD11-3353. https://doi.pangaea.de/10.1594/PANGAEA.967598
- Ai, XE; Thöle, LM; Auderset, A et al. (in review): GDGT indices and revised SST L of sediment cores MD11-3357. https://doi.pangaea.de/10.1594/PANGAEA.967600
- Ai, XE; Thöle, LM; Auderset, A et al. (in review): SST gradient and reconstructed Antarctic Circumpolar Current latitude changes of sediment cores MD11-3353 and MD11-3357. https://doi.pangaea.de/10.1594/PANGAEA.967591