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Methane, Nonmethane Hydrocarbons, Alkyl Nitrates, and Chlorinated Carbon Compounds including 3 Chlorofluorocarbons (CFC-11, CFC-12, and CFC-113) in Whole-air Samples, CDIAC/Trends

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Abstract: This data set consists of whole-air samples are collected in conditioned,
evacuated, 2-L stainless steel canisters; each canister is filled to ambient
pressure over a period of about 1 minute (approximately 20 seconds to 2
minutes). These canisters are returned to the University of California at
Irvine for chromatographic analysis.

The methane growth trend has appeared to level off in recent ... View entire text
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Description: Access to whole air sample data

Description: Information and documentation
Multimedia Sample
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Caption:  Worldwide Methane Concentrations
Description:  Worldwide Methane Concentrations

Geographic Coverage
Spatial coordinates   
  N: 90.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Blake, D.
Dataset Title: Methane, Nonmethane Hydrocarbons, Alkyl Nitrates, and Chlorinated Carbon Compounds including 3 Chlorofluorocarbons in Whole-air Samples
Dataset Series Name: Trends: A Compendium of Data on Global Change
Dataset Release Date: August 2004
Dataset Release Place: Oak Ridge, TN
Dataset Publisher: Carbon Dioxide Information Analysis Center
Online Resource:
Temporal Coverage
Start Date: 1979-04-01
Stop Date: 2002-06-30
Data Set Progress
Originating Center
Data Center
Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U. S. Department of Energy Supplemental Info
Data Center URL:

Data Center Personnel
Fax: (865) 574-2232
Contact Address:
Carbon Dioxide Information Analysis Center (CDIAC)
Oak Ridge National Laboratory
P.O.. Box 2008
Province or State: TENNESSEE
Postal Code: 37831-6335
Country: USA
Distribution Media: online WWW
Distribution Format: ascii
Fees: none
Phone: (949) 824-4195
Fax: 949-824-2905
Email: drblake at
Contact Address:
Department of Chemistry
570 Rowland Hall
University of California at Irvine
City: Irvine
Province or State: California
Postal Code: 92697-2025
Country: USA
Jonah J. Colman, Aaron L. Swanson, Simone Meinardi, Barkley C. Sive, Donald R.Blake, and F. Sherwood Rowland, Description of the Analysis of a Wide Range of Volatile Organic Compounds in Whole Air Samples Collected during PEM-Tropics A and B, Analytical Chemistry, 2001.

Isobel J. Simpson, Donald R. Blake, and F. Sherwood Rowland and Tai-Yih Chen. 2002. Implications of the recent fluctuations in the growth rate of
tropospheric methane, Geophysical Research Letters, Vol. 29, NO. 10,
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2005-04-25
Last DIF Revision Date: 2017-08-23