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NO 45
Acronym LSCE
Name Laboratoire des Sciences du Climat et de l'Environnement
Address 1 LSCE
Address 2 CEA-Orme des Merisiers, F-91191 GIF-SUR-YVETTE
Address 3
Country/Territory France
Website http://www.lsce.ipsl.fr/


Name Michel Ramonet
Prefix Dr.
Email michel.ramonet@lsce.ipsl.fr
Organization No 45
Organization acronym LSCE
Organization name Laboratoire des Sciences du Climat et de l'Environnement
Organization country/territory France
Address 1
Address 2
Address 3 LSCE - CEA Saclay - Orme des Merisiers - 91191 Gif-sur-Yvette, France
Country/territory France
Tel +33 (0)1 69 08 40 14
Fax +33 (0)1 69 08 77 16
Last updated date 2020-09-10

 Background observation
 9999-12-31 00:00:00 - 2005-12-31 23:59:59: WMO CO2 X1993
 2006-01-01 00:00:00 - 9999-12-31 23:59:59: WMO CO2 X2002
 9999-12-31 00:00:00 - 2005-12-31 23:59:59: Siemens Ultramat5F(NDIR)
 2006-01-01 00:00:00 - 9999-12-31 23:59:59: LoFlo2C(NDIR)
 Each two hours, the in-situ CO2 record is calibrated against four working standard gases. These gases are calibrated every two months against a set of 6 standard gases, which are themselves verified every year against the primary scale. Eight WMO X93 scale standard gases (calibrated at SIO) are used as primary scale.
From 2006, we use a LoFlo instrument that is calibrated once per month against 7 standards calibrated by NOAA in 2002 (WMO x2002 scale).
 [Hourly] (1) Rejection of the periods of analytical problems
(2) Selection of the hourly mean values in the following wind sectors :
300° <= WD <= 360° with wind speed >= 5 m/s
0° <= WD <= 50° with wind speed >= 5 m/s
260° < WD < 300° with wind speed > 8 m/s
(3) Selection of the periods which include at least 4 consecutive hours in the above sectors
 [Daily] Take the arithmetic mean of selected hourly data.
 [Monthly] Take the arithmetic mean of daily data.
 Temporarily suspended
 Air is pumped through a WISA II pump at a flow rate of 200 cc min-1 through Dekabon line (Ø=12mm). Air is dried using an ethanol cryogenic trap at -60°C.
From 2006 we use a LoFlo NDIR instrument. Air is pumped through a Dekabon Line (Ø=12mm) with a KNF N86 KT pump at about 2 L/min. Air is dried with a Nafion membrane combined to perchlorate magnesium.
The geographical situation of the station offers the opportunity to monitor background concentrations in southern mid-latitudes. The scientific aim is to improve our knowledge of the oceanic carbon sink in this area, as well as the emissions from South Africa. Amsterdam Island belongs to an important sampling strategy with the presence of New Caledonia (LSCE & IRD, France), Cape Grim (LSCE & CSIRO, Australia) and Cape Point (SAWB, South Africa) in the same latitude and with a regular sea transect over South Indian Ocean with the french oceanographic ship "Marion Dufresne".
 Wind direction: 1
 Wind speed: 1
 Relative humidity: 1
 Precipitation amount: 0
 Air pressure: 0
 Air temperature: 1
 Dew point temperature: 0
 Sea water temperature: 0
 Sea surface water temperature: 0
 Sea water salinity: 0
 Sea surface water salinity: 0
Meteorological data may remain as first provded, even when greenhouse gas data are updated.
 The file was made using the former WDCGG data file.
1  Gaudry A., P. Monfray, G. Polian and G. Lambert, 1987: The 1982-1983 El-Nino: a 6 Billion Ton CO2 release. Tellus, 39B, 209-213.
2  Gaudry A., J. M. Ascencio-Parvy, and G. Lambert, 1983: Preliminary Study of CO2 Variations at Amsterdam Island (Territoire des Terres Australes et Antarctiques Fran¹Êses). J. Geophys. Res., 88, 1323-1329.
3  Ascencio-Parvy J. M., A. Gaudry and G. Lambert, 1984: Year-toyear CO2 variations at Amsterdam Island in 1980-1983. Geoph. Res. Lett., 11, 1215-1217.
4  Monfray P., A. Gaudry, G. Polian and G. Lambert, 1987: Seasonal variations of atmospheric CO2 in the Southern Indian Ocean. Tellus, 39B, 67-71.
5  Gaudry A., P. Monfray, G. Polian, G. Bonsang, B. Ardouin, A. Jegou, and G. Lambert, 1990: Non-seasonal variations of atmospheric CO2 concentrations at Amsterdam Island. Tellus, 43B, 136-143.