Rule-based expert system for evaluating the quality of long-term, in-situ, gas chromatographic measurements of atmospheric methane. Technical memo
Methane is an important trace constituent of the earth's atmosphere because it is active both chemically and radiatively. The absorption of infrared radiation by atmospheric methane, and the rapid increase in the global atmospheric burden of methane over the past century combine to raise concerns that continued increases may contribute to global warming and climate change within the next century. The use of a rule-based expert system to assess the integrity of in situ gas chromatographic methane measurements made at the NOAA/CMDL Point Barrow, Alaska and Mauna Loa, Hawaii observatories is presented. The expert system flags ambient samples analyzed during chromatograph system instability and excludes them from further scientific analysis. The development and implementation of the expert system are described in detail. A comparison between data sets flagged by a human expert and by the expert system shows that the expert system can successfully reproduce the efforts of a human when evaluating gas chromatograph system stability. Advantages and limitations of the use of an expert system for the task are also discussed.
- Research Organization:
- National Oceanic and Atmospheric Administration, Boulder, CO (United States). Climate Monitoring and Diagnostics Lab.
- OSTI ID:
- 5913373
- Report Number(s):
- PB-92-128560/XAB; NOAA-TM-ERL-CMDL-3
- Resource Relation:
- Other Information: See also PB91-129122, PB90-208588, and DE91014942. Prepared in cooperation with Cooperative Inst. for Research in Environmental Science, Boulder, CO
- Country of Publication:
- United States
- Language:
- English
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01 COAL, LIGNITE, AND PEAT
AIR POLLUTION MONITORING
QUALITY CONTROL
ALASKA
AIR POLLUTION
GAS CHROMATOGRAPHY
HAWAII
METHANE
CHEMICAL ANALYSIS
ECOLOGICAL CONCENTRATION
EXPERT SYSTEMS
IMPLEMENTATION
IN-SITU PROCESSING
SAMPLE PREPARATION
ALKANES
CHROMATOGRAPHY
CONTROL
DEVELOPED COUNTRIES
FEDERAL REGION IX
HYDROCARBONS
MONITORING
NORTH AMERICA
ORGANIC COMPOUNDS
POLLUTION
PROCESSING
SEPARATION PROCESSES
USA
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects