World Data Centre for Greenhouse Gases (WDCGG)

Category	Air sampling observation
Sampling Type	flask
Sampling Height/Depth
Sampling and Analysis Frequency	Weekly
Sampling Environment
Measurement Method	Gas Chromatography (RGD)
Current status and history of Instruments	GC-RGD
Description of Instruments
Time Zone
Data Period	1990-08-01 - 2005-07-01
Data Type	event, monthly
Parameter detail
Other Descriptions for Sampling and Analyses	Air samples have been collected approximately weekly in glass flasks. Samples have been collected in one of two ways: 1) Filling a previously evacuated glass flask by opening a single stopcock; 2) Flushing glass flasks in series with a pump and pressurizing. All samples are analyzed for H₂ at the NOAA/CMDL laboratory in Boulder, Colorado. More detail is available in the published literature.
Scientific Aim
Supporting Contributor(s)
Last update	2007-09-19
Situation	ongoing

Category	Parameter	Country/Territory	Contributor

Updated in
the last 365 days

This site is maintained by the Japan Meteorological Agency
in cooperation with the World Meteorological Organization
(Created : 2001/07/02 Modified : 2010/09/02)

WMO World Data Centre for Greenhouse Gases
c/o Japan Meteorological Agency
1-3-4, Otemachi, Chiyoda-ku
Tokyo 100-8122, Japan

Tel:	+81-3-3287-3439
Fax:	+81-3-3211-4640
E-mail: