Atmospheric Methane Mixing Ratios--The NOAA/CMDL Global Cooperative Air Sampling Network, 1983-1993

Dataset · Sat Jan 01 00:00:00 EST 1994

DOI:https://doi.org/10.3334/CDIAC/ATG.DB1008· OSTI ID:1389374

Dlugokencky, E. J. ^[1]; Lang, P. M. ^[1]; Masarie, K. A. ^[1]; Steele, L. P. ^[2]

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1. National Oceanic and Atmospheric Administration, Climate Monitoring and Diagnostics Laboratory
2. CSIRO , Division of Atmospheric Research

This data base presents atmospheric methane (CH4) mixing ratios from flask air samples collected over the period 1983-1993 by the National Oceanic and Atmospheric Administration, Climate Monitoring and Diagnostics Laboratory's (NOAA/CMDL's) global cooperative air sampling network. Air samples were collected approximately once per week at 44 fixed sites (37 of which were still active at the end of 1993). Samples were also collected at 5 degree latitude intervals along shipboard cruise tracks in the Pacific Ocean between North America and New Zealand (or Australia) and at 3 degree latitude intervals along cruise tracks in the South China Sea between Singapore and Hong Kong. The shipboard measurements were made approximately every 3 weeks per latitude zone by each of two ships in the Pacific Ocean and approximately once every week per latitude zone in the South China Sea. All samples were analyzed for CH4 at the NOAA/CMDL laboratory in Boulder, Colorado, by gas chromatography with flame ionization detection, and each aliquot was referenced to the NOAA/CMDL methane standard scale. In addition to providing the complete set of atmospheric CH4 measurements from flask air samples collected at the NOAA/CMDL network sites, this data base also includes files which list monthly mean mixing ratios derived from the individual flask air measurements. These monthly summary data are available for 35 of the fixed sites and 21 of the shipboard sampling sites.For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/ndps/db1008.htmlThis dataset was transferred from the CDIAC Archive and published on ESS-DIVE in 2018 under the project title "Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Climate Monitoring and Diagnostics Laboratory (CMDL), National Oceanic and Atmospheric Administration (NOAA)". In 2023, the project title was updated to "Carbon Dioxide Information Analysis Center (CDIAC); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)" to enable consistent management of all datasets previously hosted by the CDIAC Archive that are now published on ESS-DIVE.

• Research Organization: Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States)
• Sponsoring Organization: U.S. DOE > Office of Science (SC) > Biological and Environmental Research (BER) (SC-23)
• OSTI ID: 1389374
• Report Number(s): osti:1389374; doi:10.3334/CDIAC/ATG.DB1008; cdiac:doi 10.3334/CDIAC/atg.db1008
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
Atmospheric Methane Mixing Ratios
Analysis Date
Atmospheric Methane
CH4
Flask Samples
Monthly Averages
Gas Chromatograph
Sampling Date
Sampling Time
Sampling Method
Sampling Site
Selection Criteria
Data Quality Flags
DB1008
Site
Collyr
Collmo
Collda
Collmhr
ollmn
id
Method
ch4
select
instr
analyr
analmo
analda
rawfile
nth
total
year
meth2
meth3
meth4
meth5
meth6
meth7meth8
meth9
meth10
meth11
meth12
lat
hemi