NBB:Naeba Beech Forest Research Site

Gengeral site detail (Updated 17 October 2008)
 Site name
 Naeba Beech Forest Research Site
 AsiaFlux site code
 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 10 degree
 Terrain type
 Area 900 m2
 Fetch -
 Climate Cool temperate
 Mean annual air temperature
 Mean annual precipitation
 Vegetation type
 Japanese Beech Forest
 Domestic 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)

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

 Observation items
  Levels/ Depth
 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 
 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
 26m (above  canopy) In LI-7500 system
 Precipitation 1.5 m Tipping bucket rain gauges
 (RG1, Delta-T, England)
 - Open path analyzer (LI-7500)
 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
 Data Availability
 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
 Tower, Electrical power