In:
Antarctic Science, Cambridge University Press (CUP), Vol. 21, No. 6 ( 2009-12), p. 663-680
Abstract:
In order to quantify the temporal variations of ocean properties, the MINERVE programme was designed to perform time-series measurements in the Southern Indian Ocean south of Australia. In the sub-Antarctic region (SAR, 48.5 ± 6.0°S), the mean CO 2 flux increased from spring to summer from -6.8 mmol.m -2 .d -1 in October 2005 to -9.9 mmol.m -2 .d -1 in February 2006. In the Permanent Open Ocean Zone (POOZ, 57.5 ± 3.0°S), we observed lower pCO 2 in summer than in spring (340 and 398 μatm, respectively). The mean CO 2 flux showed large temporal variations from -0.2 mmol.m -2 .d -1 in October 2005 to -8.2 mmol.m -2 .d -1 in February 2006. The large temporal variation was associated with increased phytoplankton biomass. In the Continental Antarctic Zone (66.0 ± 1.0°S), the mean CO 2 flux decreased from +14.9 mmol.m -2 .d -1 in October 2005 to -8.4 mmol.m -2 .d -1 in February 2006. In winter and spring, deep water mixing and seasonal sea-ice strongly increase pCO 2 sea above atmospheric level. In contrast, during summer, the effect of biological CO 2 uptake decreased pCO 2 sea . Furthermore, these data allowed us to parameterize A T and C T as a function of temperature and salinity.
Type of Medium:
Online Resource
ISSN:
0954-1020
,
1365-2079
DOI:
10.1017/S0954102009990319
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
2009
detail.hit.zdb_id:
2104104-0
detail.hit.zdb_id:
1009128-2
SSG:
12
SSG:
13
SSG:
14
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