Trends '90: A Compendium of Data on Global Change Page: 72 of 465
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Cape Grim
}Fi: ".;,.. "};".is":{tr:7}:~r:4'4":4"F44 s.: ::.v.::: "::;:,": r::. :::. ..n ::. v: v." +:y,.. . .. ..... ... . ...... .. ..... ......,... * .." . .BACKGROUND
Principal investigators:
Thomas J. Conway
Pieter Tans
Lee S. 'Waterman
National Oceanic and Atmospheric
Administration
Environmental Research Laboratories
325 Broadway
Boulder, Colorado 80303-3328, U.S.A.
Air sample collection -With the use of a
portable sampling apparatus, two Pyrex
glass flasks (0.5-L) previously filled with a'
dry gas of known concentration and
connecte;l in series are flushed for 5 min
with ambient air and pressurized to 1.2-1.5
times ambient atmospheric pressure.
Measurement apparatus -The flask
samples are analyzed for CO2 concen-
trations at the CMDL laboratory in Boulder
by using a UNOR-2 semiautomatic
nondispersive infrared gas analyzer.
Data selection procedures-See
Conway et al. (1988) and Komhyr et al.
(1985a).
Calibration gases used - C02-in-air.
Scale of data reported -1982-1983, SIO
X83 mole fraction scale; 1984-1987, SIO
X85 mole fraction scale.
Data availability-The NOAA/CMDL flask
data have been archived with WMO and
CDIAC. The data archived with WMO are
pair averages. The data available from
CDIAC (Conway and Tans, 1990) contain a
complete listing of individual flask values,
with flags indicating the results of NOAA/
CMDL's data selection schemes..
L _ - .............~... _ . _ . . . .380-
E
CL
C
O
C
0
04
C360-
340 -
320 -300 -
1955
1965 1975
Monthly atmospheric C02 concentrations.Cape Grim
Tasmania, Australia
Promontory seashore
40* 41'S, 144" 41'E
94 n above MSL30
1985
< rA
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Sepanski, R.J.; Stoss, F. W.; Boden, T. A.; Kanciruk, P. & Farrell, M. P. Trends '90: A Compendium of Data on Global Change, report, August 1, 1990; United States. (https://digital.library.unt.edu/ark:/67531/metadc1207824/m1/72/?q=84-9: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.