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CO2 _ TKY _ tower - insitu _ AIST _ tower1
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In line with the GAW Data Policy, users should contact the contributors of all data of interest and propose co-authorship or acknowledgement.


 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 https://unit.aist.go.jp/env-mri/117aerg/en/index-e.html

 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 2024-08-13


 Biosphere monitoring
 UTC+09:00
 ppm
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: Tohoku University 2010
 9999-12-31 00:00:00 - 2003-08-06 19:59:59: Beckman Industrial, Model 880(NDIR)
 2003-08-06 20:00:00 - 9999-12-31 23:59:59: LI-COR inc., LI-6252 or LI-6262(NDIR)
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: 1.3 (m)
 Unknown
 The CO2 analyzer was calibrated with natural-air-based working standard gases of four different CO2 mixing ratios. The standard gases were introduced into the analyzer once per an hour and once per three hours until July 1, 2020 and thereafter, respectively. These working standards are calibrated before and after usage against secondary standards maintained at AIST. Our secondary standards were calibrated against the secondary standards of Tohoku University whose CO2 mixing ratios were evaluated with the Tohoku University 2010 Scale.
 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 60-70 years (as of 2023). 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 provided, even when greenhouse gas data are updated.
 

 DOI Metadata

DOI
co2_tky_tower-insitu_6_6002-9999_hourly.nc 10.50849/WDCGG_0006-2016-1001-02-01-6002
co2_tky_tower-insitu_6_6002-9999_hourly.txt 10.50849/WDCGG_0006-2016-1001-02-01-6002
co2_tky_tower-insitu_6_6002-9999_daily.nc 10.50849/WDCGG_0006-2016-1001-02-01-6002
co2_tky_tower-insitu_6_6002-9999_daily.txt 10.50849/WDCGG_0006-2016-1001-02-01-6002
co2_tky_tower-insitu_6_6002-9999_monthly.nc 10.50849/WDCGG_0006-2016-1001-02-01-6002
co2_tky_tower-insitu_6_6002-9999_monthly.txt 10.50849/WDCGG_0006-2016-1001-02-01-6002
Version 2023-08-12-0735 (Data Version History)
* DOIs and file names may have multiple versions. Be sure to check the data version.
Title Atmospheric CO2 at Takayama by National Institute of Advanced Industrial Science and Technology, dataset published as CO2_TKY_tower-insitu_AIST_tower1 at WDCGG
Creator National Institute of Advanced Industrial Science and Technology
Shohei Murayama (AIST)
Publisher World Data Centre for Greenhouse Gases
Publication Date 2018-06-13 (Last Updated: 2023-08-15)
Format Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF
Relation List (Is Part Of) All CO2 data contributed to WDCGG by GAW stations and mobiles by 2024-09-24
All CO2 data contributed to WDCGG by GAW stations and mobiles by 2023-09-13
All CO2 data contributed to WDCGG by GAW stations and mobiles by 2022-09-07
All CO2 data contributed to WDCGG by GAW stations and mobiles by 2021-09-08
All CO2 data contributed to WDCGG by GAW stations and mobiles by 2020-09-28
All CO2 data contributed to WDCGG by GAW stations and mobiles by 2019-09-19
All CO2 data contributed to WDCGG by GAW stations and mobiles by 2018-10-25
Geolocation Point
Latitude (north: +; south: -) 36.14616667
Longitude (east: +; west: -) 137.4231111

 GAW Data Policy

"For Scientific purposes, access to these data is unlimited and provided without charge. By their use you accept that an offer of co-authorship will be made through personal contact with the data providers or owners whenever substantial use is made of their data. In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."

 Citation format

This format is an example of the WDCGG standard citation.
Please follow the citation format which the data providers or owners indicate.
Shohei Murayama (AIST), Atmospheric CO2 at Takayama by National Institute of Advanced Industrial Science and Technology , dataset published as CO2_TKY_ tower-insitu_AIST_tower1 at WDCGG, ver. 2023-08-12-0735, https://doi.org/10.50849/WDCGG_0006-2016-1001-02-01-6002 (Reference date*: YYYY/MM/DD)

* As the reference date, please indicate the date you downloaded the files.

 Reference(s)

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.