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Summary

This dataset consists of flask air samples collected at roughly weekly
intervals at 3 Canadian sites: Alert, Northwest Territories (July 1975 through
August 1992); Sable Island, Nova Scotia (March 1975 through July 1992); and
Cape St. James, British Columbia (May 1979 through July 1992). The flask
samples were analyzed for CO2 concentrations at the Institute ... of Ocean Sciences
(IOC) by using a nondispersive infrared gas analyzer. They provide an accurate
record of CO2 concentration levels in Canada during the past decade.

This project is part of a wider and on-going study of the background
composition of the atmosphere and is the Canadian contribution to the World
Meteorological Organization's network of background air pollution monitoring
stations (BAPMoN). Monitoring is continuous, but in order to be classified as
baseline data, all of the following criteria must be met:

(1) Wind speed > 18 km/hr.
(2) Wind direction: 190-280 degrees
(3) Consistency: Hourly mean CO2 concentration to be part of a block of 5
consecutive hours of data described as baseline by (1) and (2) in which
the CO2 concentrations vary by 0.3 ppmv or less.

All CDIAC numerical data packages include copies of pertinent literature
discussing the data, summaries discussing the background, source and scope of
the data, as well as applications limitations and restrictions of the data.
This data set also resides on the CDIAC CD-ROM which contains many other CDIAC
data sets.

CDIAC has provided an anonymous FTP area to all data files, retrieval codes,
and descriptive files for the NDP's that are presently available. The FTP
address is ftp://cdiac.esd.ornl.gov or 128.219.24.36 and input your
email address as the password.

The NDP-034/R1 data set is located in CDIAC's anonymous FTP in pub/ndp034r1.
All files are compressed (UNIX) ASCII text files. All the data bases
provided in this area are fully documented and are also available on 9-track
magnetic tape, CD-ROM, or IBM-formatted, high or low-density floppy diskettes.

Geographic Coverage Spatial coordinates   

N: 82.0

S: 44.0

E: -60.0

W: -131.0

Temporal Coverage

Start Date: 1975-06-01 Stop Date: 1992-08-31

Location Keywords

CONTINENT > NORTH AMERICA > CANADA > Northwest Territories > Nova Scotia > British Columbia GEOGRAPHIC REGION > MID-LATITUDE CONTINENT > NORTH AMERICA > CANADA GEOGRAPHIC REGION > POLAR VERTICAL LOCATION > TROPOSPHERE

Science Keywords

ATMOSPHERE > AIR QUALITY > EMISSIONS ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES > GREENHOUSE GASES HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > CONTAMINANTS

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE ENVIRONMENT

Platform

BAPMON > Background Air Pollution Monitoring Stations GROUND STATIONS

Instrument

CO2 ANALYZERS NDIR GAS ANALYZER > Nondispersive Infrared Gas Analyzer

Ancillary Keywords

AIR POLLUTION BAPMON CARBON CYCLE CARBON DIOXIDE CONCENTRATIONS CD-ROM CO2 FTP GREENHOUSE GASES IDN_NODE GSFC/CDIAC MONITORING NDP-034/R1 NORTHERN HEMISPHERE STATISTICS

Originating Center

CDIAC

Data Center

Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U. S. Department of Energy Data Center URL: http://cdiac.esd.ornl.gov/ Dataset ID: NDP-034 Data Center Personnel Name: CARBON DIOXIDE INFORMATION ANALYSIS CENTER Phone: (865) 574-3645 Fax: (865) 574-2232 Email: CDIAC at ORNL.GOV Contact Address: Carbon Dioxide Information Analysis Center (CDIAC) Oak Ridge National Laboratory P.O.. Box 2008 City: OAK RIDGE Province or State: TENNESSEE Postal Code: 37831-6335 Country: USA

Distribution

Distribution Media: CD-ROM Distribution Media: on-line (FTP)

Personnel

SCOTT A. RITZ Role: DIF AUTHOR Phone: 301-614-5126 Fax: 301-614-5268 Email: Scott.A.Ritz at nasa.gov Contact Address: NASA Goddard Space Flight Center Global Change Master Directory City: Greenbelt Province or State: Maryland Postal Code: 20771 Country: USA NEIL TRIVETT Role: INVESTIGATOR Phone: (416)739-4447 Fax: (416)739-4664 Contact Address: EC / Atmospheric Environment Service Air Quality Measurement and Analysis Research Division 5904 Dufferin Street M3H 5T4 City: Downsview Province or State: Ontario Country: CANADA C. S. WONG Role: INVESTIGATOR Contact Address: Marine Carbon Research Centre Institute of Ocean Sciences City: Sidney Province or State: British Columbia Country: CANADA

Publications/References

Trivett, N.B.A., and K. Higuchi, 1989: Trends and seasonal cycles of
atmospheric CO2 over Alert, Sable Island, and Cape St. James, as analyzed by
forward stepwise regression technique. pp. 27-42, IN The Statistical
Treatment of CO2 Data Records, W.P. Elliot, (ed.). Air Resources Laboratory,
Silver Spring, Maryland.

Wong, C.S., Y.H. Chan, J.S. Page, R.D. Bellegay, and K.G. Petit, 1984: Trends
of atmospheric CO2 over Canadian WMO background stations at Ocean Weather
Stations P, Sable Island, and Alert. Journal of Geophysical Research
89:9527-39.

Creation and Review Dates

Last DIF Revision Date: 1997-08-26

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