- About CDIAC
Atmospheric Carbon Dioxide Record from Kyzylcha
A.M. Brounshtein,* A.A. Shashkov, N.N. Paramonova, V.I. Privalov, Y.A. Starodubtsev
Main Geophysical Observatory,
Karbyshev Str. 7, 194018
St. Petersburg, Russia
A major part of the Russian atmospheric CO2 monitoring program in 1993-94 was financed through Project 96-1 of the Environmental Research Support Scheme of the Central European University in Budapest, established by George Soros. We are grateful to George Soros and to the Advisory Board of the Central European University Environmental Department for their kind attention and support.
Period of Record
Air is collected generally four times per month in pairs of 1.5-L stainless steel electropolished flasks with one greaseless stainless steel stopcock. Sampling is performed by opening the stopcock of the flasks, which have been evacuated at the central laboratory at the Main Geophysical Observatory (MGO). The air is not dried during sample collection. Attempts are made to obtain samples when the wind speed is >5 m/s and the wind direction corresponds to the predetermined "clean air" sector.
After the air samples are collected, the flasks are mailed to the central laboratory at the MGO once per month for CO2 determinations, which are made through the use of a URAS-2T nondispersive infrared gas analyzer. Storage times between sample collection and analysis range from 2 to 6 months. Air samples are dried cryogenically before analysis.
The URAS-2T nondispersive infrared gas analyzer is calibrated by using CO2-in-synthetic air reference gases. All gases were initially calibrated at the Scripps Institution of Oceanography (SIO) against the primary standards maintained by the World Meteorological Organization (WMO) and against NOAA/GMCC standards in 1981. In 1988 and 1989, MGO reference gases were compared with a NOAA/GMCC set of three travelling CO2-in-air gas standards. During 1990-93, 13 series of calibrations were performed against a set of 5 CO2-in-air-standards provided by the Atmospheric Environment Service (AES) of Canada. On the basis of these calibration experiments, all MGO data were recalculated to a new scale that is closely related to the WMO X87 scale through the AES standards. A 2-year field comparison program with AES, involving a regular exchange of air samples from Alert and Teriberka, showed that data from both programs are comparable within 0.2 parts per million (ppm).
Concentration values for both flasks in a pair are accepted if the difference between the values is <1 ppmv. More details about the sampling methods and selection criteria are provided in Brounshtein et al. (1985, 1988a, 1988b, 1988c) and in Shashkov and Paramonova (in press).
Kyzylcha, Republic of Uzbekistan
40°52' N, 66°09' E
340 m above MSL
In late 1989, air sampling began at the Russian site of Kyzylcha, located in the Republic of Uzbekistan. Unfortunately, the desert site at Kyzylcha has been out of operation since mid-1991 due to financial difficulties in Russia. The annual mean value of 359.02 parts per million by volume (ppmv) for 1990, the lone full year of operation, is higher than measurements from other monitoring programs at this latitude [e.g., Niwot Ridge (354.7 ppmv in 1990) and Tae-ahn Peninsula]. The brief atmospheric CO2 mixing ratio record from Kyzylcha shows a seasonal pattern indicative of northerly sites.
- Brounshtein, A.M., N.N. Paramonova, A.D. Frolov, and A.A. Shashkov. 1976. Optical method for determination of CO2 total abundance in a vertical column of the atmosphere. Trudy GGO 369:5-25.
- Brounshtein, A.M., E.V. Faber, and A.A. Shashkov. 1985. Study of measuring specifications of UGAN-CO2 instrument. Trudy GGO 496:55-65.
- Brounshtein, A.M., K.V. Kazakova, E.V. Faber, and A.A. Shashkov. 1988a. Measurements of the CO2 concentration vertical distribution above the continental regions. Annals of the MGO 519:34-42.
- Brounshtein, A.M., E..V. Faber, and A.A. Shashkov. 1988b. Measurements of the CO2 concentration above Leningrad. Annals of the MGO 519:43-45.
- Brounshtein, A.M., K.V. Kazakova, V.I. Medinez, and E.V. Faber. 1988c. Measurements of the CO2 concentrations at Ocean Station "C" (North Atlantic). Annals of the MGO 519:27-43.
- Brounshtein, A.M., E.V. Faber, and A.A. Shashkov. 1991. Atmospheric CO2 concentrations derived from flask samples collected at U.S.S.R.-Operated Sampling Sites. NDP-033. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee.
- Shashkov, A.A., and N.N. Paramonova (in press). Atmospheric CO2 monitoring in Russia. In G.I. Pearman and J.T. Peterson (eds.), Report of the Seventh WMO Meeting of Experts on Carbon Dioxide Concentration and Isotopic Measurement Techniques (September 7-10, 1993, Rome, Italy). World Meteorological Organization, Geneva.
CITE AS: Brounshtein, A.M., A.A. Shashkov, N.N. Paramonova, V.I. Privalov, and Y.A. Starodubtsev. 1994. Atmospheric CO2 records from sites in the Main Geophysical Observatory air sampling network. In Trends: A Compendium of Data on Global Change.. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.