Response of sea surface fugacity of CO2 to the SAM shift south of Tasmania: Regional differences. Issue 10 (20th May 2015)

• Record Type: Journal Article
• Authors: Xue, Liang; Gao, Libao; Cai, Wei‐Jun; Yu, Weidong; Wei, Meng
• Is Part Of: Geophysical research letters. Volume 42:Issue 10(2015:May)
• Page Start: 3973
• Page End: 3979
• Publication Date: 2015-05-20
• Subjects: Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1002/2015GL063926
• Languages: English
• ISSNs: 0094-8276

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>Using observational data collected south of Tasmania during 14 austral summer cruises during 1993–2011, we examined the response of sea surface fugacity of carbon dioxide (<italic>f</italic>CO₂) to the Southern Annular Mode (SAM) shift, which occurred around 2000. In the southern part of the Southern Ocean (SO) or the Polar Zone (PZ) and the Polar Frontal Zone (PFZ), <italic>f</italic>CO₂ increased faster at the sea surface than in the atmosphere before the SAM shift, but not after the shift. In the northern part of the SO or the Subantarctic Zone (SAZ), however, surface <italic>f</italic>CO₂ increased faster than atmospheric <italic>f</italic>CO₂ both before and after the shift. The SAM shift had an important influence on the surface <italic>f</italic>CO₂ trend in the PZ and PFZ but not in the SAZ, which we attribute to differences in regional oceanographic processes (upwelling versus nonupwelling). The SAM shift may have reversed the negative trend of SO CO₂ uptake.</p> </abstract>