| System | Open-(periodic & continuous from Apr. 2006) & Closed-path techniques |
| Wind speed | Sonic anemometer-thermometer (KAIJO, DA600-3TV, TR-61C), Sensor span: 20 cm, Height at 32 m, ca. 10 m above canopy surface. After the clear-cut (from June 2003), another sonic anemometer-thermometer (KAIJO, DA600-3TV, TR-61A) has been set near the ground |
| Air temperature | Same as above |
| Water Vapor | Before the clear cut: [Open-path method (periodic)] NDIR-gas analyzer (Data Design Group , OP-2)， Sensor span: 20 cm, Separation distance: 20 cm, Height at 32 m, ca. 10 m above canopy surface, [Closed-path method] NDIR-gas analyzer（LI-COR, LI-7000）， Distance between gas inlet and NDIR: 6m, Height of gas inlet: 32 m, ca. 10 m above canopy surface, Distance between gas inlet and anemometer: 15 cm.
After the clear cut: |
| CO2 | Same as above |
| Measurement height | See above |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | DRM3 (TEAC Corp) (until Oct 2003), CR5000 (CSI) (from Nov 2003) |
| Data storage | MO&HD(until Oct 2003), HD card&HD (from Nov 2003) |
| Original data (Raw data or statistics) | All the raw data are recorded and saved |
| Observation items | Levels / Depth (from Nov. 2002) |
Instrument |
| Global radiation (downward) | 32 m | Thermopile type pyranometer (Kipp & Zonen, CM-21F) |
| Shortwave radiation (downward) | 32, 3 m | Net radiometer (Kipp & Zonen, CNR-1) |
| Shortwave radiation (upward) | 32, 3 m | Net radiometer (Kipp & Zonen, CNR-1) |
| Long-wave radiation (downward) | 32, 3 m | Thermopile type infrared radiometer (EPPLEY, PIR only at 32m), Net radiometer (Kipp & Zonen, CNR-1) |
| Longwave radiation (upward) | 32, 3 m | Net radiometer (Kipp & Zonen, CNR-1) |
| Net radiation | 32, 3 m | Net radiometer (Kipp & Zonen, CNR-1) |
| PAR (downward) | 32, 3 m | Quantum sensor (LI-COR, LI-190SZ) |
| PAR (upward) | N.A. | N.A. |
| Air temperature | 32, 25, 21, 15, 10, 6, 4, 2 m | Ventilated platinum resistance thermometer (VAISALA, HMP45D) |
| Humidity | 32, 25, 21, 15, 10, 6, 4, 2 m | Ventilated HUMICAP hygrometer (VAISALA, HMP45D) |
| Soil temperature | -1, -5, -10, -20, -40, -80, -120 cm (×1 profile), -1, -5, -10 cm (×4 profiles) |
Platinum resistance thermometer, (CLIMATEC, C-PTWP) |
| Soil heat flux | -2 cm×5 points | Heat flow transducer (REBS, HFT-1.1) |
| Soil moisture | -5, -10, -30, -60 cm (×1 profile), -5, -10 cm (×4 profiles) |
Water content reflectometer (CSI, CS615) |
| Wind speed | 32, 25, 21, 15, 10, 6, 4 m | Photo-electric cup anemometer (MetOne, 010C) |
| Wind direction | 32 m | Photo-electric wind vane (MetOne, 020C) |
| Atmospheric pressure | 2 m | BAROCAP barometer (VAISALA, PTB210-C6C5A) |
| Precipitation | 3 m | 0.1 mm-pulse tipping-bucket rain gauge with heater (RM Young, CYG-52202) |
| Snow depth | Setting height: ca. 4m | Sonic ranging sensor (CSI, SR50) |
| Soil respiration | Automated closed chamber (Liang et. al., 2003, Agricultural and forest meteorology, 123, 97-117) (June 2003-), 8 points for larch saplings (2004-2005), 8 points for Sasa (June 2004-) and 8 points for soil; Sampling interval: every 1 hour in snow free peri |
| Photosynthesis | Sasa & Larch data in the above chamber measurement can be available for NEP estimation. |
| Ecological Investigation |
LAI: Canopy and Sasa layers (LI-COR, LAI-2000)，Sampling interval : ca. every 2 weeks
(May, 2001 - Decemver, 2002, before the clear cut), Larch saplings and remained Sasa rows
(LI-COR, LAI-2000), Sampling interval : ca. every 2 weeks to 1 month
(from May, 2003 -, after the clear cut)
Biomass: 1. Tree DBH (and its inter-annual change(2000-2002)), species,
crown size measurement in a 50×50 m quadrat beside the tower (2000),
(Koike et. al., 2001 , Eurasian Journal of Forest Research, 2, 65-79)， 2. Soil survey (2000, 2002), 3. 14ha experiment site wood biomass survey (2000) (Koike et. al., 2001, Eurasian Journal of Forest Research, 2, 65-79), 4. Biomass research of Sasa species (above and below the ground surface in 2001), 5. Biomass researches for dominant species (from 2001, 1 species for 1 year), 6. Airborne LIDAR measurement (2002, 2004), 7. Larch growth observation (every year), 8. Fine root biomass & the turn over rate (Fukuzawa et. al., 2006, Forest Ecology and Management, 225, 257-261; Fukuzawa et .al., 2006, Ecological Research, doi: 10.1007/s11284-006-0031-y) |