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Oliveira, Dulce; Desprat, Stéphanie; Yin, Qiuzhen; Zorzi, Coralie; Wu, Zhipeng; Anupama, Krishnamurthy; Prasad, Srinivasan; Alonso-Garcia, Montserrat; Martinez, Philippe (2025): Pollen-based vegetation record from IODP Site 353-U1446 (Bay of Bengal), Marine Isotope Stage 11 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.982497

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Published: 2025-05-20 • DOI registered: 2025-06-18

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Abstract:
Pollen-based vegetation reconstruction from IODP Expedition 353 Site U1446 (19°5'N, 85°4'E, 1430 m water depth) from 437,000 to 363,000 years ago, a period centered on MIS 11. The dataset includes counts and percentages of all identified pollen and spore morphotypes, as well as the main ecological groups: tropical forest, wet evergreen forest, tropical deciduous forest and xerophyte plants.
Pollen analysis: Samples of 1–5 g of dry sediment were processed using the standard protocol for marine samples, which includes coarse sieving (150 μm mesh), consecutive treatments with cold HCl and cold HF and micro-sieving (5 μm mesh). Residues were mounted unstained in a mobile media (glycerol) to allow polar and equatorial observations of pollen grains. Counting was performed using a Nikon light microscope at ×500 and ×1000 (oil immersion) magnification.
Keyword(s):
Bay of Bengal; Indian Summer Monsoon; Interglacial; MIS 11; pollen analysis
References:
Oliveira, Dulce; Desprat, Stéphanie; Yin, Qiuzhen; Zorzi, Coralie; Wu, Zhipeng; Anupama, Krishnamurthy; Prasad, Srinivasan; Alonso-Garcia, Montserrat; Martinez, Philippe (preprint): Complex interplay of forcings drives Indian vegetation and summer monsoon variability during MIS 11. EGUsphere, https://doi.org/10.5194/egusphere-2024-3341
Project(s):
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
Funding:
Fundação para a Ciência e Tecnologia (FCT), grant/award no. EXPL/CTA-CLI/0612/2021: Indian monsoon and vegetation dynamics: lessons from two contrasting glacial-interglacial cycles of the Middle Pleistocene (INDRA)
Fundação para a Ciência e Tecnologia (FCT), grant/award no. PTDC/CTA-CLI/4297/2021: Understanding the abrupt hidroclimatic variations in the middle latitdudes of North Atlantic (Hydroshifts)
Fundação para a Ciência e Tecnologia (FCT), grant/award no. UIDB/04326/2020: Centro de Ciências do Mar (CCMAR)
Portuguese Science and Technology Foundation, grant/award no. UIDB/04326/2020: CCMAR LA
Portuguese Science and Technology Foundation, grant/award no. UIDP/04326/2020: CCMAR LA
Coverage:
Latitude: 19.084000 * Longitude: 85.735000
Comment:
This dataset was additionaly funded by the French research program LEFE (INSU-CNRS) through Project MICMAc.
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets

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Datasets listed in this bundled publication

  1. Oliveira, D; Desprat, S; Yin, Q et al. (2025): Pollen-based vegetation counts from IODP Site 353-U1446, Bay of Bengal. https://doi.org/10.1594/PANGAEA.982534
  2. Oliveira, D; Desprat, S; Yin, Q et al. (2025): Pollen-based vegetation percentages from IODP Site 353-U1446, Bay of Bengal. https://doi.org/10.1594/PANGAEA.982537