Last Update: 04/05/2026 at 2:50 PM EST
Antarctic Melt Weakens Carbon Uptake
Coverage from ScienceDaily, Phys.org, and others
Articles
8
Latest Article
03/23
Active Days
48
Executive Summary
New field and core data show Antarctic melt delivers iron that is too insoluble or too limited to boost algae, weakening Southern Ocean carbon uptake
- Sediment core data link warm periods to more iceberg iron in the Southern Ocean
- Much of the iceberg iron was weathered and poorly soluble, limiting phytoplankton use
- Higher iron delivery did not produce larger algal blooms or stronger carbon uptake
- Field work at Dotson Ice Shelf found meltwater supplied about 10 percent of dissolved iron
- Deep ocean water provided about 62 percent of the iron and shelf sediments about 28 percent
- Isotope analysis suggests subglacial bedrock dissolution is an important iron source
- The findings may change Southern Ocean carbon cycle and climate model assumptions
Quick Facts
- What: They found meltwater and iceberg iron are less bioavailable than assumed
- Where: West Antarctica and the Pacific sector of the Southern Ocean
- Why: Iron chemistry and source mix affect algae growth and carbon uptake
- Who: Rutgers and partner researchers studying Antarctic iron sources
- When: Field work in 2022 with sediment evidence from a 2001 core
Coverage Timeline: 48 Days
Featured Article
Rutgers University and partners measured iron sources in 2022 at the Dotson Ice Shelf, Amundsen Sea, West Antarctica, showing meltwater carries little iron.
Additional Articles
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Researchers report that iceberg delivered iron in weathered form reduces ocean carbon uptake in the Southern Ocean during warming periods.
Rutgers University researchers in 2022 at Dotson Ice Shelf, Amundsen Sea, West Antarctica report meltwater iron contributions are small relative to deep ocean and sediment sources.
Rutgers researchers report 2022 field measurements near Dotson Ice Shelf show meltwater iron input is minor in the Southern Ocean iron budget.
Rutgers researchers in 2022 at Dotson Ice Shelf West Antarctica found meltwater supplies only minor iron input to the Southern Ocean.
Rutgers University and Texas A&M researchers test iron sources with field measurements during an expedition at the Dotson Ice Shelf in the Amundsen Sea to assess iron fertilization theory.
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Rutgers University researchers conducted a 2022 field study near the Dotson Ice Shelf in West Antarctica, finding iron levels too low to fuel large algal blooms.
Rutgers marine scientists measured dissolved iron around the Dotson Ice Shelf in the Amundsen Sea and found meltwater contributed about 10%, suggesting revised Southern Ocean carbon-cycle assumptions.