|Name||National Institute for Environmental Studies|
|Address 2||National Institute for Environmental Studies|
|Address 3||16-2 Onogawa, Tsukuba 305-8506, Japan|
|Organization name||National Institute for Environmental Studies|
|Address 2||Center for Global Environmental Research|
|Address 3||16-2, Onogawa, Tsukuba-shi, Ibaraki 305-8506, Japan|
|Last updated date||2020-02-28|
9999-12-31 00:00:00 - 9999-12-31 23:59:59: NIES95
9999-12-31 00:00:00 - 9999-12-31 23:59:59: Shimadzu URA207(NDIR)
9999-12-31 00:00:00 - 9999-12-31 23:59:59: 51 (m)
Calibration is carried out after each 2-hours sample measurement, using four working standard gases, which are measured for 15 minutes sequentially. The calibration data are fitted with a quadratic function. The working standard gases are calibrated against primary standard gases (NIES 95) at NIES before and after their use.
NIES 95 Scale: the primary standard gases are CO2-in-air mixtures and were prepared gravimetrically with a precise balance.
[Daily] Daily mean concentrations are calculated by averaging the hourly data obtained during the reported day.
[Monthly] Monthly mean concentrations are calculated by averaging the daily data obtained during the reported month.
|9 : The daily mean calculated with lesser than twelve hourly data or the monthly mean calculated with lesser than twenty daily data.|
|The height of the air intake is 51 meters above ground level (96 meters above mean sea-level). Three cold traps are used to dry the air samples. The temperatures of the first, second and third traps are 2 , -45 and -65 ℃, respectively. The NDIR outputs data every second, but 5-seconds averages are recorded by the computer.|
Wind direction: 1
Wind speed: 1
Relative humidity: 0
Precipitation amount: 0
Air pressure: 1
Air temperature: 1
Dew point temperature: 0
Sea water temperature: 0
Sea surface water temperature: 0
Sea water salinity: 0
Sea surface water salinity: 0
Meteorological data may remain as first provded, even when greenhouse gas data are updated.
The file was made using the former WDCGG data file.
|1||Mukai H., Katsumoto M, Ide R., Machida T., Fujinuma Y., Nojiri Y., Inagaki M., Oda N., and Watai T., 2001 : Characterization of atmospheric CO2 observed at two-background air monitoring stations (Hateruma and Ochi-ishi) in Japan. 6th Intern. Carbon Dioxide Conf., Ext.Abstr., Vol 1, 108-111.|