Sniffle: a step forward to measure in situ CO2 fluxes with the floating chamber technique
- Mariana Ribas-Ribas
- L. F. Kilcher
- Oliver Wurl
DOIAbstract
Understanding how the ocean absorbs anthropogenic CO2 is critical for predicting climate change. We designed 'Sniffle', a new autonomous drifting buoy with a floating chamber, to measure gas transfer velocities and air–sea CO2 fluxes with high spatiotemporal resolution. Currently, insufficient 'in situ' data exist to verify gas transfer parameterizations at low wind speeds (<4 m s−1), which leads to underestimation of gas transfer velocities and, therefore, of air–sea CO2 fluxes. The 'Sniffle' is equipped with a sensor to consecutively measure aqueous and atmospheric 'p'CO2 and to monitor increases or decreases of CO2 inside the chamber. During autonomous operation, a complete cycle lasts 40 minutes, with a new cycle initiated after flushin...
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