Site name
| National Institute of Fruit Tree Science |
AsiaFlux site code
| NFT |
| Location | Fujimoto, Tsukuba, Ibaraki, Japan |
| Position | 36° 33´ N, 140° 8´ E
|
| Elevation | 40 m above sea level |
| Slope | 0 degree |
Terrain type
| - |
| Area | 400 m2 |
| Fetch | 50-90 m |
| Climate | - |
Mean annual air temperature
| - |
Mean annual precipitation
| - |
Vegetation type
| Fruit farm |
Domestic species (Overstory)
| Japanese pear |
Dominant species (Understory)
| Poor vegetation of annual weeds
(mowed several times a year) |
Canopy height
| 2.2-3.5 m (seasonally change) |
| Age | 22 years (2001) |
| LAI | 0 to 4 |
Soil type
| - |
ObservationsEddy Covariance method (CO
2)
| System | open-path system |
Wind speed
| Gill research |
Air temperature
| - |
Water vapor
| Advanet E009b |
| CO2 | Advanet E009b |
Measurement height
| 3.5 m |
Sampling frequency
| 10 Hz |
Averaging time
| 20 min |
Data logger
| Not used |
Data storage
| Directly to PC (Dell) |
Original data
| -
|
Meteorology
Observation items
| Levels/ Depth
| Instrument
|
Global solar radiation(incoming)
| - | Thermocouple type pyranometer (MS-61, EKO) |
Global solar
radiation (outgoing)
| - | |
Long-wave radiation(outgoing)
| - | |
Long-wave radiation(outgoing)
| - | |
Net radiation
| 5 m | Ventilated radiometer(CN11, EKO) |
PPFD (incoming)
| - | |
PPFD (outgoing)
| - | |
Direct / diffuse radiation
| - | |
Direct / diffuse PPFD
| - | |
Air temperature
| Just above canopy surface and above 0.8 m | Ventilated thermocouple psychrometer (handmade) |
| Humidity | Just above canopy surface and above 0.8 m | Dew point hygrometer (handmade) |
Soil temperature
| 0.05 m | Thermocouple |
Soil heat flux
| -
| |
Soil water
content
| 0.1, 0.2 m | DIK-1600 |
Wind speed
| - | |
Wind direction
| - | |
Barometric
pressure
| - |
|
| Precipitation | - | |
CO2 concentration
| - | IRGA (Yokokawa electric ) |
Other
Soil respiration
| - |
| Photosynthesis | - |
Ecological investigation
| LAI, Fruit yield |
