SRK

SRK: Shirakami Beech Forest Site

General site details

Site name	Shirakami Beech Forest Site
AsiaFlux site code	SRK
Location	Ajigasawa, Aomori, JAPAN
Position	40° 33´ 56" N, 140° 7' 40" E
Elevation	340 m above sea level
Slope	15 degree
Terrain type	West facing slope of a mountain
Area	more than 4 km²
Fetch	more than 1 km
Climate	Cool temperate (Dfa)
Mean annual air temperature	8.6 degreeC (from January 2009 to December 2010)
Mean annual precipitation	probably around 3,000 mm
Vegetation type	Deciduous broadleaved forest
Dominant Species (Overstory)	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	-

Observation

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	6m	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