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The comprehensive field research on the carbon cycle in forest ecosystem was conducted at Tomakomai Flux Research site (TMK), in a cool-temperate deciduous needle-leaf forest in Hokkaido, Japan. Unfortunately, the tower and observation systems were destroyed by the strong winds during a typhoon in 2004 and the monitoring was stopped. Available datasets are the flux and meteorological data from 2001 to 2003. This dataset is also provided by the AsiaFlux Database (http://asiaflux.net/index.php?page_id=23).
Description
Creator
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Ryuichi Hirata
Center for Global Environmental Research, Earth System Division, National Institute for Environmental Studies
NIES research staff page: https://www.nies.go.jp/researchers-e/300173.html |
Release date
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2021/06/11
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Temporal coverage
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2001/01/01 - 2003/12/31
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Data provider
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National Institute for Environmental Studies
Email: cgerdb_admin(at)nies.go.jp |
DOI
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File format
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CSV
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Data volume
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16.1 MB
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Version
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ver.3.1 (Last updated: 2021/06/11)
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Language
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English
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Data Set
Parameters
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Net ecosystem CO2 exchange
CO2 flux Sensible heat flux Latent heat flux Friction velocity Global solar radiation (incoming) Global solar radiation (outgoing) Long-wave radiation (incoming) Long-wave radiation (outgoing) Net Radiation Transmitted global solar radiation Absorbed global solar radiation Global solar radiation Albedo Photosynthetic active photon flux density Reflected PAR Transmitted PAR Absorbed PAR PAR Albedo Wind direction Wind speed Barometric pressure Air temperature Vapor pressure deficit Relative humidity Precipitation Ground heat flux Soil temperature Soil water content |
Time resolution |
30 minutes
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Observation period |
2000/09/01 - 2004/09/08
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Observation site
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Tomakomai Flux Research Site
Location: 42.73697°N, 141.5186°E
Elevation: 140 m Sampling height: 41, 40, 38, 32, 27, 26, 22, 18, 16, 14, 12, 8, 6, 5, 3, 1.5, 1, 0, -0 .05, -0.1 -0.2, -0.5 m |
Measurement method |
Net ecosystem CO2 exchange flux (NEE) was measured by eddy covariance (EC) method on a measurement tower (42 m) in a larch forest in the Tomakomai National Forest, Hokkaido. Three-dimensional wind speeds and virtual temperatures are measured using a three-dimensional sonic anemometer-thermometer, and CO2 fluctuation was measured using closed-path CO2/H2O analyzers at height of 27 m. Data were sampled and logged at frequency of 10 Hz. The vertical profile of CO2 concentration was also measured at 7 heights from 1-26 m.
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Calculation method |
The CO2 concentration measured by closed-path gas analyzer was calibrated once a day using two standard CO2 gases. The net ecosystem exchange (NEE) of CO2 was derived from the sum of the flux measured by EC (F_EC) and the rate of change in column CO2 storage under EC measurement height (Fs). Half-hourly mean F_EC was calculated as the covariance between fluctuations in vertical wind speed and scalar quantity of CO2 concentration. The setting of the quality control applied to the 30-minute value of the turbulent flux is described in the information file attached to this data together with the source. Half-hourly mean Fs was calculated from the vertical profile of CO2 concentration at 7 heights.
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Keywords
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[GCMD_Platform]
In Situ Land-based Platforms > Ground Stations
[GCMD_Science]LAND SURFACE
[Free keywords]Net ecosystem carbon exchange
Eddy covariance method Micrometeorology Deciduous needle-leaf forest |
Update history
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[2021/06/11]
The flux and meteorological data from 2001 to 2003 were compiled in Asiaflux Database Format (csv file), ver 3.1.
[2016/10/05]Some of available parameters were changed in ver.3.1, as updating from ver.3.0. See the correspondence table for parameters between ver.3.0 and ver. 3.1 in the supplementary file (Parameters_v3.0_v3.1.pdf). The flux and meteorological data from 2001 to 2003 were compiled in NASA Ames Format 1001 and csv format. Ver. 3.0.
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Contributors
Contributors
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Yoshiyuki Takahashi
Project manager
Takashi HiranoCenter for Global Environmental Research, Earth System Division, National Institute for Environmental Studies NIES research staff page: https://www.nies.go.jp/researchers-e/100114.html Supervisor
Research Faculty of Agriculture, Hokkaido University Website: https://researchmap.jp/read0021106/ |
Reference Information
Supplementary Materials
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Site description: SiIn_TMK_2001-2003_05.pdf
Description of the flux and meteorological data for 2001: FxMt_TMK_2001_30m_03-1.pdf Description of the flux and meteorological data for 2002: FxMt_TMK_2002_30m_03-1.pdf Description of the flux and meteorological data for 2003: FxMt_TMK_2003_30m_03-1.pdf Correspondence table for parameters between ver. 3.0 and ver.3.1: Parameters_v3.0_v3.1.pdf |
Reference
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Hirata, R., Saigusa, N., Yamamoto, S., Ohtani, Y., Ide, R., Asanuma, J., Gamo, M., Hirano, T., Kondo, H., Kosugi, Y., Li, S-G., Nakai, Y., Takagi, K., Tani, M., Wang, H. 2008. Spatial distribution of carbon balance in forest ecosystems across East Asia, Agricultural and Forest Meteorology, 148, 761-775, DOI:10.1016/j.agrformet.2007.11.016.
Saigusa, N., Yamamoto, S., Hirata, R., Ohtani, Y., Ide, R., Asanuma, J., Gamo, M., Hirano, T., Kondo, H., Kosugi, Y., Li, S-G., Nakai, Y., Takagi, K., Tani, M., Wang, H. 2008, Temporal and spatial variations in the seasonal patterns of CO2 flux in boreal, temperate, and tropical forests in East Asia, Agricultural and Forest Meteorology, 148, 700-713, DOI:10.1016/j.agrformet.2007.12.006.
Hirata, R., Hirano, T., Okada, K., Fujinuma, Y. Inukai, K., Saigusa, N., Yamamoto, S. 2005. Effects of wind speed and direction on eddy fluxes over a larch plantation, Journal of Agricultural Meteorology, 60, 741–744.
Liang, N., Nakadai, T., Hirano, T., Qu, L., Koike, T., Fujinuma, Y., Inoue, G. 2004. In situ comparison of four approaches to estimating soil CO2 efflux in a northern larch (Larix kaempferi Sarg.). Agricultural and Forest Metrology, 123: 97–117, DOI:10.1016/j.agrformet.2003.10.002.
Wang, H., Saigusa, N., Yamamoto, S., Kondo, H., Hirano, T., Toriyama, A., Fujinuma, F. 2004. Net ecosystem CO2 exchange over a larch forest in Hokkaido, Japan. Atmospheric Environment, 38: 7021-7032, DOI:10.1016/j.atmosenv.2004.02.071.
Hirano, T., Hirata, R., Fujinuma, Y., Saigusa, N., Yamamoto, S., Harazono, Y., Takada, M., Inukai, K, Inoue, G. 2003. CO2 and water vapor exchange of a larch forest in northern Japan. Tellus. 55B: 244–257, DOI:10.1034/j.1600-0889.2003.00063.x.
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Hirata, R. (2021), Micrometeorological CO2 Flux Data at Tomakomai Flux Research Site (TMK), Ver.x.x *1, NIES, DOI:10.17595/20210611.001, (Reference date*2: YYYY/MM/DD)
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