Abstract
Abstract Iron (Fe) is a limiting micronutrient in many marine ecosystems. The lack of sufficient Fe can stunt marine productivity and limit carbon sequestration from the atmosphere to the ocean. Recent studies suggest that biomass burning represents an important Fe source to the marine environment because pyrogenic particles have enhanced solubility after atmospheric processing. We examined foliage representative of four distinct biomes subject to frequent burning events, including boreal/temporal forests, humid tropical, arid tropical, and grassland. We burned these samples in the absence of soil to isolate the Fe from the fine particle (PM 2.5 ) fraction that is derived directly from the burning foliage. We find that <1.5% of the Fe in plant matter is aerosolized throughout the burn in the fine fraction. We estimate that between 2% and 9% of the Fe released from biomass burning can be attributed to the fine fraction of the foliage itself, and <50% from the foliage overall. Most of the Fe aerosolized during biomass burning is accounted for by soil‐suspended particles.
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Claims 4
Claim · model-written summary
Less than 1.5% of the Fe in plant matter is aerosolised in the fine fraction during burning.
Verbatim
e0“We examined foliage representative of four distinct biomes subject to frequent burning events”
e1“We find that <1.5% of the Fe in plant matter is aerosolized throughout the burn in the fine fraction.”
Claim · model-written summary
An estimated 2% to 9% of the Fe released from biomass burning is attributable to the fine fraction of the foliage itself.
Verbatim
e0“We examined foliage representative of four distinct biomes subject to frequent burning events”
e2“We estimate that between 2% and 9% of the Fe released from biomass burning can be attributed to the fine fraction of the foliage itself, and <50% from the foliage overall.”
Claim · model-written summary
Less than 50% of the Fe released from biomass burning is attributable to the foliage overall.
Verbatim
e0“We examined foliage representative of four distinct biomes subject to frequent burning events”
e2“We estimate that between 2% and 9% of the Fe released from biomass burning can be attributed to the fine fraction of the foliage itself, and <50% from the foliage overall.”
Claim · model-written summary
Most of the Fe aerosolised during biomass burning is accounted for by soil-suspended particles.
Verbatim
e0“We examined foliage representative of four distinct biomes subject to frequent burning events”
e3“Most of the Fe aerosolized during biomass burning is accounted for by soil”