An updated anthropogenic CO2 inventory in the Atlantic ocean

• Published in: Global Biogeochemical Cycles
• Main Authors: Lee, K, Choi, SD, Park, GH, Wanninkhof, R, Peng, TH, Key, RM, Sabine, CL, Feely, RA, Bullister, JL, Millero, FJ, Kozyr, A
• Other Authors: 환경연구소, 10056383
• Format: Article in Journal/Newspaper
• Language: English
• Published: AMER GEOPHYSICAL UNION 2003
• Subjects: anthropogenic CO(2); Atlantic ocean; air-sea disequilibrium; WESTERN BOUNDARY CURRENT; EASTERN NORTH-ATLANTIC; CARBON-DIOXIDE; DISSOCIATION-CONSTANTS; ATMOSPHERIC CO2; CIRCULATION MODEL; INDIAN-OCEAN; WEDDELL SEA; WATER; INCREASE; anthropogenic CO2; Indian; Pacific; Southern Ocean; Weddell; Weddell Sea; North Atlantic
• Online Access: https://oasis.postech.ac.kr/handle/2014.oak/18186; https://doi.org/10.1029/2003GB002067

[1] This paper presents a comprehensive analysis of the basin-wide inventory of anthropogenic CO2 in the Atlantic Ocean based on high-quality inorganic carbon, alkalinity, chlorofluorocarbon, and nutrient data collected during the World Ocean Circulation Experiment (WOCE) Hydrographic Program, the Joint Global Ocean Flux Study (JGOFS), and the Ocean-Atmosphere Carbon Exchange Study (OACES) surveys of the Atlantic Ocean between 1990 and 1998. Anthropogenic CO2 was separated from the large pool of dissolved inorganic carbon using an extended version of the DeltaC* method originally developed by Gruber et al. [ 1996]. The extension of the method includes the use of an optimum multiparameter analysis to determine the relative contributions from various source water types to the sample on an isopycnal surface. Total inventories of anthropogenic CO2 in the Atlantic Ocean are highest in the subtropical regions at 20degrees-40degrees, whereas anthropogenic CO2 penetrates the deepest in high-latitude regions (>40degreesN). The deeper penetration at high northern latitudes is largely due to the formation of deep water that feeds the Deep Western Boundary Current, which transports anthropogenic CO2 into the interior. In contrast, waters south of 50degreesS in the Southern Ocean contain little anthropogenic CO2. Analysis of the data collected during the 1990 1998 period yielded a total anthropogenic CO2 inventory of 28.4 +/- 4.7 Pg C in the North Atlantic (equator-70degreesN) and of 18.5 +/- 3.9 Pg C in the South Atlantic (equator-70degreesS). These estimated basin-wide inventories of anthropogenic CO2 are in good agreement with previous estimates obtained by Gruber [ 1998], after accounting for the difference in observational periods. Our calculation of the anthropogenic CO2 inventory in the Atlantic Ocean, in conjunction with the inventories calculated previously for the Indian Ocean [ Sabine et al., 1999] and for the Pacific Ocean [ Sabine et al., 2002], yields a global anthropogenic CO2 inventory of 112 +/- 17 Pg C ...