Atmospheric carbon dioxide at Mauna Loa Observatory 2. Analysis of the NOAA GMCC data, 1974--1985
The first 12 years (1974--1985) of continuous atmospheric CO/sub 2/ measurements from the NOAA GMCC programs at the Mauna Loa Observatory in Hawaii are analyzed. Hourly and daily variations in the concentration of CO/sub 2/ due to local sources and sinks are described, with subsequent selection of data representing background concentrations. A digital filtering technique using the fast Fourier transform and low-pass filters was used to smooth the selected data and to separate the seasonal cycle from the long-term increase in CO/sub 2/. The amplitude of the seasonal cycle was found to be increasing at a rate of 0.05/plus minus/0.02 ppm yr/sup /minus/1/. The average growth rate of CO/sub 2/ was 1.42/plus minus/0.02 ppm yr/sup /minus/1/, and the fraction of CO/sub 2/ remaining in the atmosphere from fossil fuel combustion was 59%. A comparison between the Mauna Loa continuous CO/sub 2/ data and the CO/sub 2/ flask sample data from the sea level site at Cape Kumukahi, Hawaii, showed that the amplitude of the seasonal cycle at Cape Kumakahi was 23% larger than at Mauna Loa, with the phase of the cycle at Mauna Loa lagging the cycle at Cape Kumukahi by about 1-2 weeks. /copyright/ American Geophysical Union 1989
- Research Organization:
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder (US); Air Resources Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado
- OSTI ID:
- 5882739
- Journal Information:
- J. Geophys. Res.; (United States), Vol. 94:D6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON DIOXIDE
AIR POLLUTION MONITORING
ATMOSPHERIC CIRCULATION
HAWAII
CLIMATES
DAILY VARIATIONS
DATA ANALYSIS
FOSSIL FUELS
FOURIER TRANSFORM SPECTROMETERS
POLLUTION SOURCES
SEASONAL VARIATIONS
US NOAA
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
FEDERAL REGION IX
FUELS
MEASURING INSTRUMENTS
NATIONAL ORGANIZATIONS
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
SPECTROMETERS
US ORGANIZATIONS
USA
VARIATIONS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)