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 Organization

NO 6
Acronym AIST
Name National Institute of Advanced Industrial Science and Technology
Address 1 Environmental Management Research Institute
Address 2 National Institute of Advanced Industrial Science and Technology (AIST)
Address 3 AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
Country/Territory Japan
Website

 Contact(s)

Name Shohei Murayama
Prefix
Email s.murayama@aist.go.jp
Organization No 6
Organization acronym AIST
Organization name National Institute of Advanced Industrial Science and Technology
Organization country/territory Japan
Address 1
Address 2
Address 3 AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
Country/territory Japan
Tel +81-29-861-8300
Fax +81-29-861-8358
Last updated date 2019-11-26


 Biosphere monitoring
 UTC+09:00
 ppm
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: Beckman Industrial, LI-COR inc. Model 880 (Beckman) or LI-6252 (LI-COR)(NDIR)
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: 1.3 (m)
 Unknown
 NIRE (AIST) Scale: The primary standards were produced using a gravimetric method, whose mixing ratio scale was compared to that of Tohoku University, Japan through inter-calibration. A scale equivalent to that of Tohoku University obtained from the relationship between both scales is employed.
The CO2 analyzer is calibrated with natural-air-based working standard gases of 4 different CO2 mixing ratios that are introduced into the analyzer once an hour. These working standards are calibrated before and after usage against secondary standards maintained at AIST. The mixing ratios of the secondary standards are determined against primary standards.
 All available data other than erroneous data due to sampling or analytical problems are reported.
 [Hourly]
 [Daily] Daily mean data are calculated by averaging the hourly data.
 [Monthly] Monthly mean data are calculated by averaging the daily data.
 
 Operational/Reporting
 The observation site is located in a cool-temperate deciduous forest in a mountainous area in the central part of the main island of Japan and is situated about 15 km east of Takayama City. The main tree species at the site are deciduous broad-leaved trees such as birch and oak, whose average height is about 17 m. The ground surface is covered with bamboo grass. This forest has been protected for at least 50 years. Budding and defoliation occur in May and October, respectively,and the ground surface is usually covered with snow from December to April.
Air intakes are mounted at the following heights on a 27-m tower:
September 1993 to March 1999: 27, 18, 8.8 and 5.8 m above the ground (the top level is above the canopy, the second just above the canopy, and the lowest two inside the canopy).
March 1999 to May 2003: 27, 18, 8.8 and 2.0 m above the ground.
May 2003 to August 2003: 27, 18, 8.8 and 3.0 m above the ground.
August 2003 to January 2004: 27, 18, 8.8, 5.8, 3.0 and 1.3 m above the ground.
January 2004-: 27, 18, 8.8, 5.8, 2.0 and 1.3 m above the ground.
The air is drawn by a diaphragm pump and introduced into an NDIR CO2 analyzer after removing aerosols and water vapor.
 Wind direction:
 Wind speed:
 Relative humidity:
 Precipitation amount:
 Air pressure:
 Air temperature:
 Dew point temperature:
 Sea water temperature:
 Sea surface water temperature:
 Sea water salinity:
 Sea surface water salinity:
Meteorological data may remain as first provded, even when greenhouse gas data are updated.
 
1  Murayama et al. (2003) Temporal variations of atmospheric CO2 concentration in a temperate deciduous forest in central Japan, Tellus 55B, 232-243.
2  Murayama et al. (2005) Statistical analyses of inter-annual variations in the vertical profile of atmospheric CO2 mixing ratio and carbon budget in a cool-temperate deciduous forest in Japan, Agricultural and Forest Meteorology 134, 17-26.
3  Murayama et al. (2010) Seasonal variations of atmospheric CO2, delta-13C, and delta-18O at a cool temperate deciduous forest in Japan:
Influence of Asian monsoon, Journal of Geophysical Research, 115, D17304, doi:10.1029/2009JD013626.