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Utilizing Soil Density Fractionation to Separate Distinct Soil Carbon Pools
Published on: December 16, 2022
Recalcitrant dissolved organic carbon fractions
1Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, USA. dhansell@rsmas.miami.edu
Annual Review of Marine Science
|August 14, 2012
Summary
Marine dissolved organic carbon (DOC) has varying reactivity, influencing the ocean
Area of Science:
- Marine organic geochemistry
- Ocean biogeochemistry
- Climate science
Background:
- Marine dissolved organic carbon (DOC) displays a wide range of reactivities.
- These reactivities define distinct DOC fractions with crucial roles in carbon cycling.
- DOC influences the microbial loop, biological pump, and potentially atmospheric CO2 levels.
Purpose of the Study:
- To quantitatively and qualitatively characterize the major fractions of recalcitrant DOC in the global ocean.
- To elucidate the roles of these DOC fractions in marine carbon biogeochemistry.
- To propose a functional nomenclature for ocean DOC fractions.
Main Methods:
- Characterization of recalcitrant DOC pools.
- Analysis of DOC reactivity and turnover times.
- Assessment of DOC roles in carbon cycling processes.
Main Results:
- Identification and characterization of major recalcitrant DOC fractions.
- Quantification of these fractions within the global ocean.
- Elucidation of their specific functions in carbon biogeochemistry.
Conclusions:
- Recalcitrant DOC is composed of distinct fractions with defined roles in ocean carbon cycling.
- A new nomenclature is proposed to classify these fractions based on their biogeochemical functions.
- Understanding these fractions is key to comprehending oceanic carbon storage and climate variability.
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