Abstract: AbstractHypoxia has occurred intermittently in the Baltic Sea since the establishment of brackish‐water conditions at ∼8,000 years B.P., principally as recurrent hypoxic events during the Holocene Thermal Maximum (HTM) and the Medieval Climate Anomaly (MCA). Sedimentary phosphorus release has been implicated as a key driver of these events, but previous paleoenvironmental reconstructions have lacked the sampling resolution to investigate feedbacks in past iron‐phosphorus cycling on short timescales. Here we employ Laser Ablation (LA)‐IC...
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