| System | Closed-path system |
| Wind speed | Three-dimensional sonic anemometer-thermometer (DA600-3TV (Probe TR-61A), KAIJO) |
| Air temperature | Three-dimensional sonic anemometer-thermometer (DA600-3TV (Probe TR-61A), KAIJO) |
| Water Vapor | Closed-path CO2/H2O analyzers (LI-6262, LI-COR) |
| CO2 | Closed-path CO2/H2O analyzers (LI-6262, LI-COR) |
| Measurement height | 25 m |
| Sampling frequency | 5 Hz |
| Averaging time | 30 min |
| Data logger | CR3000, Campbell Scientific, USA |
| Data storage | Compact Flash Memory |
| Original data (Raw data or statistics) | Raw data |
| Observation items | Levels / Depth | Instrument |
| Global solar radiation (incoming) | 25.5 m | Net radiometer, MR-50, EKO |
| Global solar radiation (outgoing) | 25.5 m | Net radiometer, MR-50, EKO |
| Long-wave radiation (incoming) | 25.5 m | Net radiometer, MR-50, EKO |
| Long-wave radiation (outgoing) | 25.5 m | Net radiometer, MR-50, EKO |
| Net radiation | 24.5 - 25.5 m | Albedo meter, MR21, EKO and Infrared radiometer, MS201, EKO |
| PPFD (incoming) | 19.5, 2.0 m | Quantum sensor, IKS27, Koito |
| PPFD (outgoing) | 19.5 m | Quantum sensor, IKS27, Koito |
| Direct/diffuse radiation | - | - |
| Direct/diffuse PPFD | - | - |
| Air temperature | 25, 18, 10 m | Platinum resistance thermometer, HMP233, Vaisala |
| Humidity | 25, 18, 10 m | Humicap hygrometer, HMP233, Vaisala |
| Soil temperature | 1,10,20,50 cm | Platinum resistance thermometer, MT-010S, EKO |
| Soil heat flux | 2 cm | Soil heat flux plate, MF81, EKO |
| Soil water content | 15, 40 cm | TDR soil water content sensor, CS615, Campbell. It is calibrated occasionally by oven drying of soil samples |
| Wind speed | 25, 10 m | Combined wind vane and fan anemometer, MA-110, EKO |
| Wind direction | 25, 10 m | Combined wind vane and fan anemometer, MA-110, EKO |
| Barometric pressure | 1.5 m | Barometer, 1332A-10, Rosemount |
| Precipitation | None at the site, but obtained from nearby stations | |
| CO2 concentration | 27, 18, 8.8, 5.8, 2, 1.3 m | Non dispersive infrared gas analyzer, LI-6252, LI-COR |
| Soil respiration | Continuous measurement: (1994-2005) Open-flow Chamber System (OF); (2005-present) Automated Chamber System (AOCC) Periodical measurements: LI-6400, Closed-chamber method |
| Photosynthesis | Periodical measurements for canopy and shrub tree species, and dwarf bamboo grass in understory (A-Ci curve by LI-6400) |
| Ecological Investigation | Individual tree biomass by DBH measurement once per year Litter fall measurements (14 x 1m2) Fine root biomass and growth by mini-rhizotron |
| LAI | Obtained from Plant Canopy Analyzer on an occasional basis, while calculated on a continuous basis from the attenuation of PAR |
| Air sampling | CO2 concentration and its carbon and oxygen isotopic ratios. |