Weber, Michael E (2021): Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.939650
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report the first high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5 Ma, thus doubling that from Antarctic ice-cores. We find a 5 to 15-fold increase in dust deposition during glacials and a 2 to 5-fold increase in biogenic silica deposition, reflecting higher ocean productivity during interglacials. This antiphasing persisted throughout the last 25 glacial cycles. Dust deposition became more pronounced across the Mid-Pleistocene Transition (MPT) in the Southern Hemisphere, with an abrupt shift suggesting more severe glaciations since ~0.9 Ma. Productivity was intermediate pre-MPT, lowest during the MPT and highest since 0.4 Ma. Generally, glacials experienced extended sea-ice cover, reduced bottom-water export and Weddell Gyre dynamics, which helped lower atmospheric CO2 levels.
Supplement to:
Weber, Michael E; Bailey, Ian; Hemming, Sidney R; Martos, Yasmina M; Reilly, Brendan T; Ronge, Thomas A; Brachfeld, Stefanie A; Williams, Trevor J; Raymo, Maureen E; Belt, Simon T; Smik, Lukas; Vogel, Hendrik; Peck, Victoria L; Armbrecht, Linda; Cage, Alix G; Cardillo, Fabricio G; Du, Zhiheng; Fauth, Gerson; Fogwill, Chris J; García, Marga M; Garnsworthy, Marlo; Glüder, Anna; Guitard, Michelle; Gutjahr, Marcus; Hernández-Almeida, Iván; Hoem, Frida; Hwang, Ji-Hwan; Iizuka, Matsumi; Kato, Yuji; Kenlee, Bridget; O'Connell, Suzanne B; Pérez, Lara F; Seki, Osamu; Stevens, Lee; Tauxe, Lisa; Tripathi, Shubham; Warnock, Jonathan; Zheng, Xufeng (2022): Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years. Nature Communications, 13, 2044, https://doi.org/10.1038/s41467-022-29642-5
Project(s):
Coverage:
Median Latitude: -59.110990 * Median Longitude: -40.906014 * South-bound Latitude: -59.111000 * West-bound Longitude: -40.906208 * North-bound Latitude: -59.110763 * East-bound Longitude: -40.906000
Date/Time Start: 2019-04-26T08:15:00 * Date/Time End: 2019-05-03T14:30:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
12 datasets
Download Data
Datasets listed in this bundled publication
- Weber, ME (2021): Accumulation rate calculations in equidistant 200-year steps of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939646
- Weber, ME (2021): Age model uncertainty of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939644
- Weber, ME (2021): Calcium and Iron content of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939633
- Weber, ME (2021): Color components from line scan of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939641
- Weber, ME (2021): Dry bulk density content of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939634
- Weber, ME (2021): Bulk density content of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939636
- Weber, ME (2021): Natural gamma ray counts of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939638
- Weber, ME (2021): Opal content of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939639
- Weber, ME (2021): Color reflectance of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939640
- Weber, ME (2021): Si/Ti and Si/Al ratios of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939642
- Weber, ME (2021): Stratigraphy of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939649
- Weber, ME (2021): Tuned age model of IODP Site 382-U1537. https://doi.org/10.1594/PANGAEA.939643