TGF: Terrestrial Environment Research Center, University of Tsukuba General site detail (updated 11 April 2008)
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
Domestic 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
Observations 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)
PPFD (outgoing)
-
Direct / diffuse radiation
-
Direct / diffuse PPFD
-
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)
Wind direction
-
Barometric pressure
-
Precipitation
-
TERC* routine (*TERC: Terrestrial Environment Research Center, University of Tsukuba)
CO2 concentration
-
H2O concentration
-
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
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)
