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TWH: Taiwan Huisun Forest Station

TWH site photos

General site details

Site nameTaiwan Huisun Forest Station
AsiaFlux site codeTWH
LocationNantou, Taiwan
Position121° 07' 33.60" E, 24° 04' 33.60" N
Elevation2076 m above sea level
SlopeNorth: 14.51° East: 8.53° West: 22.85° South: 3.21°
Terrain typeMountain ridge
Area10 ha
Fetch5 km
ClimateHumid subtropical climate (Cwa)
Mean annual air temperature11
Mean annual precipitation2369
Vegetation typeTaiwan broadleaf forest
Dominant Species (Overstory)-
Dominant Species (Understory)-
Canopy heightAbout 30 m
Ageover 500 years
LAI5-6
Soil typeInceptisols

Observation

Eddy Covariance method (CO2)

SystemOpen-path system (CO<sub>2</sub> flux, latent heat flux)
Wind speed3D sonic anemometer (CSAT3, Campbell Scientific, Inc., USA)
Air temperatureFine Wire Thermocouples (FW05 Type E, Campbell Scientific, Inc., USA)
Water vaporOpen path Gas Analyzer (LI-7500, Li-cor, USA)
CO2Open path Gas Analyzer (LI-7500, Li-cor, USA)
Measurement height60 m
Sampling frequency10 Hz
Averaging time30 min
Data loggerCR1000 (Campbell, USA)
Data storagePC
Original dataRaw data

Meteorology

Observation items Levels/Depth Instrument
Global solar radiation(incoming) 40 m Precision Spectral Radiometer (The Eppley Lab., Inc.)
Global solar radiation (outgoing) 40 m Precision Spectral Radiometer (The Eppley Lab., Inc.)
Long-wave radiation(incoming) 40 m Precision Spectral Radiometer (The Eppley Lab., Inc.)
Long-wave radiation(outgoing) 40 m Precision Spectral Radiometer (The Eppley Lab., Inc.)
Net radiation 40 m Precision Spectral Radiometer (The Eppley Lab., Inc.)
Air temperature 20, 40, 60 m FW05 Type E Fine Wire Thermocouples (Campbell Scientific, Inc.)
Humidity 20, 40, 60 m HMP45C (Campbell Scientific, Inc.)
Soil temperature 0.04, 0.18, 0.70, 1.00 m Model 107 Temperature Probe (Campbell Scientific, Inc., USA)
Soil heat flux 0.15 m HFT3 Soil Heat Flux Plate (Campbell Scientific, Inc., USA)
Soil water content 0.1, 0.2, 0.3, 0.4, 0.5 m SEN12012 EasyAGII for Soil Volumetric Water Content Profile (Campbell Scientific, Inc., USA)
Wind speed 60 m 3D sonic anemometer (CSAT3, Campbell Scientific, Inc., USA)
Wind direction 60 m 3D sonic anemometer (CSAT3, Campbell Scientific, Inc., USA)
Precipitation 0 m Tipping bucket type Rain Gauge, No. 34-T (OTA KEIKI SEISAKUSHO CO., LTD., Japan)
CO2 concentration 60 m Open path Gas Analyzer (LI-7500, Li-cor, USA)

Other

Lysimeter -
Throughfall -
Sapflow -
Soil respiration -

Observation Period and Data Availability

Measurement PeriodJanuary 2011 to prestnt
Measurement FrequencyContinuous
Data Availability2011-2013 in AsiaFlux Database

Contact

Ben-Jei Tsuang(tsuang [at] nchu.edu.tw)
Department of Environmental Engineering,National Chung Hsing University250, Kuo Kuang Rd., Taichung 402, Taiwan R.O.C.
Tel:+886-4-22851206 Fax:+886-4-22862587

Infrastructure

Tower, Electrical power (AC), Facilities for accommodation