TGF: Terrestrial Environment Research Center, University of Tsukuba
General site details
| Site name | Terrestrial Environment Research Center, University of Tsukuba |
|---|---|
| AsiaFlux site code | TGF |
| Location | Tsukuba, Ibaraki, Japan |
| Position | 36º 07'N, 140º 08'E |
| Elevation | 20 m above sea level |
| Slope | Nearly 0 deg. |
| Terrain type | Almost flat |
| Area | 20,000 m2 |
| Fetch | 150 m (for main wind direction) |
| Climate | Warm and humid climate |
| Mean annual air temperature | 14.1 ºC (2001-2003) |
| Mean annual precipitation | 1157 mm (2001-2003) |
| Vegetation type | C3/C4 grassland |
| Dominant Species (Overstory) | Solidago altissima Linn. Miscanthus sinensis Andress. Imperata cylindrical Beauv. Var. koenigii Durand et Schinz |
| Dominant Species (Understory) | - |
| Canopy height | Varied from zero to 1.8 m |
| Age | Annual herb |
| LAI | - |
| Soil type | Kuroboku soil |
Observation
Eddy Covariance method (CO2)
| System | Open-path system (CO2 flux, latent heat flux) |
|---|---|
| Wind speed | Sonic anemometer-thermometer, DA600-3T (KAIJO) |
| Air temperature | - |
| Water vapor | Open path(LI-7500, Li-Cor, USA) |
| CO2 | Open path(LI-7500, Li-Cor, USA) |
| Measurement height | 2.0 m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | CR-23x (Campbell, USA) |
| Data storage | MO |
| Original data | Raw data and statistics |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 2.4 m | Radiometer MR-40 (Eko) |
| Global solar radiation (outgoing) | 2.4 m | Radiometer MR-40 (Eko) |
| Long-wave radiation(incoming) | 2.4 m | Radiometer MR-40 (Eko) |
| Long-wave radiation(outgoing) | 2.4 m | Radiometer MR-40 (Eko) |
| Net radiation | 2.4 m | Radiometer MR-40 (Eko) |
| PPFD (incoming) | 2.4 m | Quantum sensor, IKS-27 (Koito) |
| Air temperature | 2.0 m | Platinum resistance thermometer, HMP45A (Vaisala) |
| Humidity | 2.0 m | Capacitive moisture sensor, HMP45A (Vaisala) |
| Soil temperature | 0.05 m | T-type thermocouple (handmade) |
| Soil heat flux | 0.05 m | Heat plate, MF-81 (Eko) |
| Soil water content | 0.15 m | CS615 (Vaisala) |
| Wind speed | 2.0 m | Sonic anemometer-thermometer, DAT600 (KAIJO) |
| Precipitation | - | TERC* routine (*TERC: Terrestrial Environment Research Center, University of Tsukuba) |
Other
| Soil respiration | Photosynthesis porometer LI-6400R (Li-cor) |
| Photosynthesis | Photosynthesis porometer LI-6400 (Li-cor) |
| Ecological investigation | Monthly (from Apr to Oct) |
Observation Period and Data Availability
| Measurement Period | from 2001-2004 |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Jun Asanuma (asanuma [at]suiri.tsukuba.ac.jp)
Terrestrial Environment Research CenterUniversity of Tsukuba Tsukuba, Ibaraki 305-8577, Japan
Tel:+81-298-53-6704 Fax:+ 81-298-53-6704
Seiji Shimoda (sss [at] affrc.go.jp)
National Agricultural Research Center for Western Region 6-12-1
Nishi-fukatsucho, Fukuyama, Hiroshima, 721-8514 Japan.
Tel:+849-23-5342(ex.660) Fax:+81-849-24-7893
Yohei Hamada (hamada [at] suiri.tsukuba.ac.jp)
Graduate School of Life and Environmental Sciences,
University of Tsukuba
1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572 Japan
TEL：029-853-4531 FAX：029-853-6614
Other
Takehisa Oikawa
Infrastructure
AV 100 V
Calibration Information
Open-path analyzers were calibrated approximately every one to two months with standard CO2 gases and a dew point generator (LI610; LI- COR Inc., USA)