MINERVE program (Mesures à l'INterface Eau-aiR de la
Variabilité des Echanges de CO2), which is pressed
on valorization campaigns of transit, is to observe and to
understand seasonal variabilities of the pressure partial
of CO2 (pCO2) and Total Inorganic Carbon in surface water
in partnership with hydrological measurements and biogeochemical
in-situ and with the assistance of satellite data (temperature,
color of the sea). Logistic courses of Astrolabe, make it
possible to reach zones very little studied and to document
them in order to include/understand the processes which explain
the variations space-time of pCO2 with average scale in the
southern oceanic areas. Data collected during these programs
will be used as a basis to make estimates of the interannual
variability and average variation (tendency) of flow Net of
CO2 to the interface ocean-atmosphere; an extention of this
program was required (realization of some hydrographic stations
average depths during one of rotations), which will make it
possible to apprehend calculation by various methods of the
CO2 signal anthropic which penetrates in the ocean in this
southern sector. By identifying and quantifying CO2 sources
and sinks, observations collected at the time of campaigns
MINERVE are also used to other teams to force atmospheric
models and to validate biogeochemical models based on models
of oceanic circulation general which try to simulate the cycle
of oceanic carbon in the medium and long term.
Astrolabe at the beginning of Hobart in Tasmanie...
passage in little studied zones ...
accordance with INDIVAT program (1985-87, on board Marion-Dufresne),
MINERVE program began in 1990: an instrumentation was placed
at station on Marion-Dufresne, which made it possible of 1990
to 1997 to carry out 40 valorization campaigns of transit,
majority in western part of Indian Ocean and Indian the Antarctic
sector, areas where very few observations had been done before
1990. Severals campaigns were coupled with oceanographical
campaigns (WOCE, JGOFS). The whole of measurements MINERVE
90-97 were analyzed and published (cf publications).
Since 2002 equipment was modified and installed on the Astrolabe
and was adapted to the extremes conditions of measurement
met on the ways Hobart to Dumont d'Urville. From 2002 to 2005,
3 campaigns were carried out each year. In this site, only
the data collected during these 9 last campaigns are presented.
Astrolabe took in the pack ...
at Dumont D'Urville.
On national level, MINERVE is associed with
differents programs : PROOF
On international level, the area visited is covered
by programs organized in collaboration with foreign laboratories
in the Atlantic Ocean, Pacifique and south-eastern Indien.
Associated programmes : JGOFS , SOLAS, IGBP, CLIVAR,