Data Set Citation:
When using this data, please cite the data package:
Murayama S.
CO2 concentration data, AsiaFlux TKY site, 1993-present, Takayama, Japan; CO2濃度データ アジアフラックスTKYサイト,高山(たかやま)
JaLTER-takayama-01.23.5 (http://db.cger.nies.go.jp/JaLTER/metacat/metacat/JaLTER-takayama-01.23.5/jalter-en)
General Information:
Title:CO2 concentration data, AsiaFlux TKY site, 1993-present, Takayama, Japan; CO2濃度データ アジアフラックスTKYサイト,高山(たかやま)
Identifier:JaLTER-takayama-01.23.5
Abstract:
CO2 concentration data in a deciduous broadleaf forest, AsiaFlux TKY site, Japan. The data has been measured continuously at flux tower.落葉広葉樹林のフラックス観測タワーにおけるCO2濃度の連続計測データ。
Keywords:
  • CO2
  • concentration
  • WDCGG
  • tower
  • 二酸化炭素
  • 濃度
  • タワー

Involved Parties

Data Set Owners:
Individual: Shohei Murayama
Organization:Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST)
Address:
AIST Tsukuba West, 16-1 Onogawa,
Tsukuba, Ibaraki 305-8569 Japan
Phone:
+81-29-861-8366 (voice)
Phone:
+81-29-861-8358 (fax)
Email Address:
s.murayama (at) aist.go.jp
Data Set Contacts:
Individual: Shohei Murayama
Organization:Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST)
Address:
AIST Tsukuba West, 16-1 Onogawa,
Tsukuba, Ibaraki 305-8569 Japan
Phone:
+81-29-861-8366 (voice)
Phone:
+81-29-861-8358 (fax)
Email Address:
s.murayama (at) aist.go.jp

Data Set Characteristics

Time Period:
Begin:
1993
End:
2009

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:
Description:
-

CO2 concentration

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.

Instrument(s): Beckman Industrial, LI-COR inc. Model 880 (Beckman) or LI-6252 (LI-COR)
Sampling Area And Frequency:
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.
Sampling Description:

Data Set Usage Rights

Data Availability: 1993-2006 on WDCGG Database. Data policy: Please refer to the WDCGG web site (URL:http://gaw.kishou.go.jp/wdcgg/wdcgg.html)
Access Control:
Auth System:knb
Order:denyFirst
Metadata download: Ecological Metadata Language (EML) File