East China Sea Sediment Core Data on Hypoxia and Carbon Fixation, 1995-2000s

34.5 KB of data from two sediment cores (3100-1 and DH5-0) in the East China Sea's hypoxic zones, used to reconstruct multi-decadal to centennial-scale oxygen variability. The dataset, authored by Jiawei Kan and shared on figshare under CC-BY-4.0, estimates anoxygenic photosynthetic carbon fixation (AnP_C-F) from bacteriopheophytin a profiles. AnP_C-F increased by 1.79 times in core DH5-0 and 1.59 times in core 3100-1 between the period before 2000 and after 2000.

Use Cases

• Modeling long-term hypoxia trends based on bacteriopheophytin a profiles from sediment cores.
• Estimating anoxygenic photosynthetic carbon fixation in marine environments based on the described proxy method.
• Analyzing the impact of stratification disruption events, such as the 1995-1996 Changjiang basin flooding, on hypoxia records.
• Comparing centennial-scale (DH5-0) and multi-decadal-scale (3100-1) oxygen variability patterns on the inner shelf.

Strengths

• Provides a multi-decadal to centennial-scale reconstruction of hypoxia, a record type described as previously absent.
• Quantifies a 1.79-fold and 1.59-fold increase in estimated anoxygenic carbon fixation between two distinct temporal phases.
• Data is derived from two spatially distinct sediment cores (northern and southern hypoxic zones) in the East China Sea.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The 34.5 KB file size suggests a very limited data scope.

Provenance

Source

figshare, author Jiawei Kan.

Collection Method

Analysis of bacteriopheophytin a profiles from sediment cores.

Time Range

Multi-decadal to centennial scale, with a noted phase shift around the year 2000 and a specific event in 1995-1996.

Freshness

Last updated 2026-04-27 01:51:41; freshness should be verified.

Geography

East China Sea, specifically northern (core 3100-1) and southern (core DH5-0) hypoxic zones.