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Role of oceanic iron biogeochemistry in atmospheric CO2 variability between the last glacial maximum and the holocene

During the last glacial cycle, atmospheric CO2 varied by about 80–100 ppmv between glacial and interglacial periods. A substantial fraction of this change is thought to reflect variations in the strength of the marine biological pump, driven in part by changes in iron (Fe) supply from mineral dust to highnutrient, low-...

Natalia Estefania Opazo Cuevas · 0 citations
Open access Aug 2026

Biogenic Magnetite Indicating Millennial‐Scale Evolution of Bottom Water Oxygenation in the Northern South China Sea Since About 30 ka

Previous studies indicate that bottom‐water oxygenation (BWO) during glacial–interglacial transitions varies complexly, particularly on millennial timescales. Here we reconstruct millennial‐scale BWO variations since ∼30 ka using biogenic magnetite preserved in sediments from the northern South China Sea. Magnetofossil...

Yu-Lan Ye, Xiao-Qiang Yang, Bang-Qi Hu et al. · 0 citations
Open access Aug 2026

Seasonal and Interannual Variability of Antarctic Bottom Water Downstream of the Four Key Formation Regions

Antarctic Bottom Water (AABW) is a cold, dense water mass formed around Antarctica that ventilates the global abyssal ocean. Recent studies have reported widespread warming, freshening, and thinning of AABW, yet its temporal variability remains poorly constrained because of sparse observations. This limits our abilit...

P. Sholeninova, A. K. Morrison, A. Foppert et al. · 0 citations

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