Japanese beech (Fagus crenata Blume), Japanese white bark magnolia (Magnolia obovata)
Dominant species (Understory)
-
Canopy height
about 25m
Age
Around 130 years for some tall beech trees (2012)
LAI
-
Soil type
-
Observations Eddy Covariance method (CO2)
System
Open-path eddy covariance system
Wind speed
Three-dimensional sonic anemometer-thermometer (81000, Young, USA)
Air temperature
Three-dimensional sonic anemometer-thermometer (81000, Young, USA)
Water vapor
Open-path infrared gas analyzer (LI-7500, LI-COR, USA)
CO2
Open-path infrared gas analyzer (LI-7500, LI-COR, USA)
Measurement height
32.5 m
Sampling frequency
10 Hz
Averaging time
30 min
Data logger
CR1000 (Campbell, USA)
Data storage
CF
Original data
Raw data
Meteorology
Observation items
Levels/ Depth
Instrument
Global solar radiation(incoming)
32 m
4 component net radiometer (MR-50, EKO, Japan)
Global solar radiation (outgoing)
32 m
4 component net radiometer (MR-50, EKO, Japan)
Long-wave radiation(outgoing)
32 m
4 component net radiometer (MR-50, EKO, Japan)
Long-wave radiation(outgoing)
32 m
4 component net radiometer (MR-50, EKO, Japan)
Net radiation
-
PPFD (incoming)
32 m
Quantum sensor (ML-020P, EKO, Japan; June 2009 to present)
PPFD (outgoing)
32 m
Quantum sensor (ML-020P, EKO, Japan; June 2009 to present)
Direct / diffuse radiation
-
Direct / diffuse PPFD
-
Air temperature
32, 28 20,10 m
Platinum resistance thermometer (HMP45A for 32, 28 m and HMP155 for 20, 10 m, Vaisala, Finland)
Humidity
32, 28 20,10 m
Capacitive hygrometer (HMP45A for 32, 28 m and HMP155 for 20, 10 m, Vaisala, Finland)
Soil temperature
1,5,10, 20,40 cm
Five temperature data loggers (UA-001-64, Onset, USA)
Soil heat flux
1 cm
Four thermopile heat flux sensors (MF-81,EKO,Japan)
Soil water content
0-10 cm
Time-domain refrectometers (CS-616, Campbell, USA)
Wind speed
-
Wind direction
-
Barometric pressure
-
Precipitation
28 m
Tipping-bucket rainguage (CTK-15PC, Climatec, Japan) (heater not operated)
CO2 concentration
-
snow depth
6 m
Sonic snow depth meter (SR50A, Campbell, USA)
Other
Soil respiration
Measured by closed chamber system several times a year from 2010 to 2011.
Photosynthesis
-
Ecological investigation
Species and GBH within the area of 30,000 m2 around the flux tower, once a year since 2009.
Observation Period and Data Availability
Measurement Period
from August 2008
Measurement Frequency
Continuous
Data Availability
-
Contact
Sachinobu Ishida (ishida [at] hirosaki-u.ac.jp) Graduate School of Science and Technology, Hirosaki University 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan Phone and Fax: +81-172-39-3621
Daiyu Ito (daiyu [at] hirosaki-u.ac.jp) Teaching and Research Center for Bio-coexistence, Faculty of Agriculture and Life Science, Hirosaki University 7-1, Shimobukuro, Fujisaki, Fujisaki, Aomori, 038-3802, JAPAN
Infrastructure
Tower 34m (Stairs not equipped) Electric Power: Batteries(DC12V) + Solar panels