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| Lo Monaco, C; Metzl, N; Poisson, A; Brunet, C; Schauer, B. |
| The Southern Ocean, where various water masses are formed ( mode, intermediate, deep, and bottom waters), has a high potential to absorb anthropogenic CO(2) ( C ant). However, most data-based and model estimates indicate low C(ant) inventories south of 50 degrees S. In order to investigate this paradox, the distribution of C(ant) is estimated between South Africa and Antarctica ( World Ocean Circulation Experiment ( WOCE) line I6) based on a back-calculation technique previously used in the North Atlantic ( Kortzinger et al., 1998) and adapted here for application in the Southern Ocean. At midlatitudes (30 degrees-50 degrees S), formation and spreading of mode and intermediate waters results in a deep penetration of C(ant) ( down to 2000 m). South of 50... |
| Tipo: Text |
Palavras-chave: Anthropogenic CO2; Southern Ocean; WOCE. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00233/34409/32823.pdf |
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| Lo Monaco, C; Goyet, C; Metzl, N; Poisson, A; Touratier, F. |
| The Southern Ocean is thought to play an important role in the context of global warming and anthropogenic emissions of CO(2) due to its high sensitivity to both climate change and changes in the carbon cycle. Assessing the penetration of anthropogenic CO(2) (C(ant)) into the Southern Ocean is therefore highly relevant to reduce the uncertainties attached to both the present knowledge of anthropogenic carbon inventories and predictions made by current ocean carbon models. This study compares different data-based approaches for estimating the distribution of C(ant) in the ocean: a recently developed method based on the composite Tracer Combining Oxygen, Inorganic Carbon, and Total Alkalinity (TrOCA) and the "historical'' back-calculation methods (the... |
| Tipo: Text |
Palavras-chave: Anthropogenic carbon; Southern Ocean; WOCE. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00233/34405/32827.pdf |
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| Jabaud-jan, A; Metzl, N; Brunet, C; Poisson, A; Schauer, B. |
| The interannual variations of the carbon dioxide system and air-sea CO(2) fluxes are analyzed in the southwestern Indian Ocean from both in situ (Ocean Indien Service d'Observations cruises in 1998 and 2000) and simulated oceanic CO(2) fugacity f(CO2) dissolved inorganic carbon, total alkalinity, and nutrients. During austral summer of 1998, the ocean was warmer from 20degreesS to 60degreesS. In the Subtropical Zone (20degreesS-37degreesS), the warming, associated with the subtropical dipole pattern, creates an oceanic CO(2) source around 2 mmol m(-2) d(-1) in January 1998 where all previous observations, included in 2000, indicated that this region was a small sink in summer. In the Sub-Antarctic and Polar Front Zones (37degreesS-50degreesS), the f(CO2)... |
| Tipo: Text |
Palavras-chave: Air-sea CO(2) fluxes; Southern Ocean; Seasonal and interannual variabilities; Warm anomaly. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00228/33919/32208.pdf |
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| Coatanoan, Christine; Metzl, N; Fieux, M; Coste, B. |
| A multiparametric approach is used to analyze the seasonal properties of water masses in the eastern Indian Ocean. The data were measured during two cruises of the Java Australia Dynamic Experiment (JADE) program carried out during two opposite seasons: August 1989 (SE monsoon) and February-March 1992 (NW monsoon). These cruises took place at the end of a La Nina event and during an EI. Nino episode, respectively. Seven sources have been identified in the studied region for the 200-800 m layer: the Subtropical Indian Water, the Indian Central Water, the modified Antarctic Intermediate Water, the Indonesian Subsurface Water, the Indonesian Intermediate Water, the Arabian Sea-Persian Gulf Water (AS-PGW), and the Arabian Sea-Red Sea Water (AS-RSW). The... |
| Tipo: Text |
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| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00172/28365/26657.pdf |
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