NBB: Naeba Beech Forest Research Site
General site details
| Site name | Naeba Beech Forest Research Site |
|---|---|
| AsiaFlux site code | NBB |
| Location | Naeba, Niigata, Japan |
| Position | 36° 52´ 43.8"' N, 138° 46´ 3.47" E, (World Geodetic System 1984) |
| Elevation | 900 m above sea level |
| Slope | slope |
| Terrain type | slope |
| Area | 900 m2 |
| Fetch | - |
| Climate | Cool temperate |
| Mean annual air temperature | - |
| Mean annual precipitation | - |
| Vegetation type | Japanese Beech Forest |
| Dominant Species (Overstory) | Beech (Fagus crenata) Oak (Quercus mongolica var. grosseserrata) |
| Dominant Species (Understory) | Bamboo (Sasa kurilensis ) |
| Canopy height | 21 m |
| Age | Ca. 85 years old |
| LAI | About 7.5 (2006), 6.2 (2007) |
| Soil type | Forest Brown Soil (Basalt) |
Observation
Eddy Covariance method (CO2)
| System | open-path system ( CO2 flux, latent heat flux |
|---|---|
| Wind speed | Three-dimensional sonic anemometer (Csat3, Campbell, USA) |
| Air temperature | Thermistor (RSH-1010, Tabai-Espec, Osaka, Japan) |
| Water vapor | Open path analyzer (LI-7500) |
| CO2 | Open path analyzer (LI-7500) |
| Measurement height | 26 m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | CR23X, cambell, USA |
| Data storage | 2MB Memory stick |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 23 m (above canopy) | Pyranometer (LI-200SA, LICOR, USA) |
| Global solar radiation (outgoing | 23 m (above canopy) | Pyranometer (LI-200SA, LICOR, USA) |
| Long-wave radiation(outgoing) | ||
| Long-wave radiation(outgoing) | ||
| Net radiation | - | |
| PPFD (incoming) | 23 m (above canopy), 7 m (below canopy) | Quantum sensor (LI-190B, LI-COR, USA) |
| PPFD (outgoing) | 23 m | Quantum sensor (LI-190B, LI-COR, USA) |
| Direct / diffuse radiation | - | |
| Direct / diffuse PPFD | 23 m (above canopy) | Quantum sensor with shadow band (BF2, Delta-T, England) |
| Air temperature | 23, 15, 5 m | Thermistor (RSH-1010, Tabai-Espec, Osaka, Japan |
| Humidity | 23, 15, 5 m | Capacitor sensors (RSH-1010, Tabai-Espec, Osaka, Japan) |
| Soil temperature | 5, 10, 25, 50, 100 cm | Waterproof thermistor (103-ETB, Semitec Ishizuka Electronics, Tokyo, Japan) |
| Soil heat flux | - | |
| Soil water content | 25 cm | Time-domain reflectometry (TDR) (ML2 Theta Probe, Delta-T, England) |
| Wind speed | 23 m (above canopy) | Cup anemometers (AN1, Delta-T, England) |
| Wind direction | - | |
| Barometric pressure | 26m (above canopy) | In LI-7500 system |
| Precipitation | 1.5 m | Tipping bucket rain gauges (RG1, Delta-T, England) |
| CO2 concentration | - | Open path analyzer (LI-7500) |
Other
| Soil respiration | Continuous (automatic chambers) |
| Photosynthesis | frequently |
| Ecological investigation | Tree DBH, stand density, biomass, LAI (since 2005 with seasonal curves) |
Observation Period and Data Availability
| Measurement Period | May 2009 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Yoshitaka Kakubari (afykaku [at] agr.shizuoka.ac.jp) Quan Wang (wangquan [at] agr.shizuoka.ac.jp) Naramoto (naramoto [at] agr.shizuoka.ac.jp) Atsuhiro Iio (atsuii [at] oagr.shizuoka.ac.jp) Institute of Silviculture, Shizuoka University, Shizuoka 422-8529, Japan Tel: +81-2384840 Fax: +81-54-2384841
Infrastructure
Tower, Electrical power