Atmospheric Carbon Dioxide Concentration at Jubany StationEntry ID: Atm_Carb_Diox_conc_Jubany_stat
Abstract: CO2 concentration of the atmosphere at the Laboratory level are obtained at the station Jubany managed jointly by PNRA of Italy and DNA of Argentina. The measurements are taken by using a Siemens U5 analyzer based on NDIR (Non Dispersive InfraRed) absorption method. The air is sampled by using an intake placed at 10 m above the ground, then is pumped inside the Laboratory. Before entering the ... analyzer the water vapor of the air is subtracted by using a cold trap (< -70 degrees C).
The analyzer scale is periodically automatically calibrated (every 3 hours) by using station standards (tanks containing synthetic air having an assigned CO2 concentration). These tanks are re-determined every week comparing their concentration vs. a set of so-called secondary standard and finally secondary standards are calibrated (every 3-4 months) vs. a set of primary standards whose concentration was assigned by a WMO Reference Laboratory (now run by NOAA CMDL, Boulder). The Reference Laboratory maintains the so-called WMO scale determined by an absolute method and all the Institutions and Laboratories participating in the WMO-GAW (Global Atmospheric Watch) use the same scale.
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Start Date: 1994-01-01Stop Date: 2002-12-31
ISO Topic Category
Quality Hourly data (expressed in mole fraction and or ppmv) are selected by using
criteria based on stability of the measurements and on wind.
Use Constraints Same applied by PNRA (Research activity supported by the National Program of
Data Set Progress
Distribution Media: floppy-disk, CD
Distribution Format: ASCII
L. Ciattaglia, T. Colombo K.A. Masarie (1999), Continuous Measurements of Atmospheric CO2 at Jubany Station, Antarctica., Tellus, 51B, 713-721
A.Anav, L.Ciattaglia, C.Rafanelli (1999), Was the ElNino 1997-98 responsible for the anomalous CO2 trend in the Antarctic atmosphere?, VIII Workshop on Antarctic Atmosphere, conf. proc.v.69, 375-385, Bologna
T. Colombo, R. Lenaz, C. Ori, K. Masarie, L. Ciattaglia, G. Giovanelli and P. Bonasoni (2000), Latitudinal distribution of atmospheric carbon dioxide variations determined by continuous measurements registered during hemispheric cruises from Europe to Antarctica., Il Nuovo Cimento, 23, 5, 507-514
Creation and Review Dates
DIF Creation Date: 2005-05-12
Last DIF Revision Date: 2011-07-29