Sea surface fugacity of carbon dioxide measurements in the Indian and Southern Oceans obtained during MINERVE-29/ANTARES-II cruise ...

• Main Authors: Metzl, Nicolas, Tilbrook, Bronte, Poisson, Alain
• Format: Dataset
• Language: English
• Published: PANGAEA 1999
• Subjects: DATE/TIME; LATITUDE; LONGITUDE; DEPTH, water; Pressure, atmospheric; Fugacity of carbon dioxide in seawater; Fugacity of carbon dioxide air, 100% humidity; Fluorescence; Temperature, technical; Temperature, water; Salinity; Biogeochemical Processes in the Oceans and Fluxes PROOF; Joint Global Ocean Flux Study JGOFS; Antarc*; Antarctic; Antarctic Ocean; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.135711; https://doi.pangaea.de/10.1594/PANGAEA.135711

The sub-Antarctic zone (SAZ) lies between the subtropical convergence (STC) and the sub-Antarctic front (SAF), and is considered one of the strongest oceanic sinks of atmospheric CO2. The strong sink results from high winds and seasonally low sea surface fugacities of CO2 (fCO2), relative to atmospheric fCO2. The region of the SAZ, and immediately south, is also subject to mode and intermediate water formation, yielding a penetration of anthropogenic CO2 below the mixed layer. A detailed analysis of continuous measurements made during the same season and year, February - March 1993, shows a coherent pattern of fCO2 distributions at the eastern (WOCE/SR3 at about 145°E) and western edges (WOCE/I6 at 30°E) of the Indian sector of the Southern Ocean. A strong CO2 sink develops in the Austral summer (delta fCO2 < - 50 µatm) in both the eastern (110°-150°E) and western regions (20°-90°E). The strong CO2 sink in summer is due to the formation of a shallow seasonal mixed-layer (about 100 m). The CO2 drawdown in ... : Supplement to: Metzl, Nicolas; Tilbrook, Bronte; Poisson, Alain (1999): The annual fCO2 cycle and the air-sea CO2 fluxes in the sub-Antarctic Ocean. Tellus Series B-Chemical and Physical Meteorology, 51(4), 849-861 ...