BBY: Bibai bogeneral site detail (Updated 16 September 2015) Site name Bibai bog AsiaFlux site code BBY Location Bibai, Hokkaido Position 43°19' 22.82"N, 141°48'38.51"E Elevation 17 m Slope 0 degree, North : 0 degree Terrain type Flat plain field Area Preserved wetland Fetch Wetland dominated by Sphagnum moss : 60 m for north, 40 m for south, 100 m for west, and 50 m for east Climate Cool temperate (Dfb) Mean annual air temperature 7.2ºC (1981-2010 mean) Mean annual precipitation 1156.5 mm (1981-2010 mean) Vegetation type Wetland dominated by Sphagnum moss Domestic species (Overstory) Sphagnum moss, Rhynchospora fauriei, Dominant species (Understory) - Canopy height 30 to 50 cm Age - LAI Maximum ap 2 m2 m-2 Soil type peat
Observations 2 ) System Open-path system Wind speed Sonic anemometer (CSAT3, Campbell Scientific Inc.,) Air temperature Sonic anemometer (CSAT3, Campbell Scientific Inc.,) Water vapor IRGA (EC150, Campbell Scientific Inc.,) CO2 IRGA (EC150, Campbell Scientific Inc.,) Measurement height 2.3 m Sampling frequency 10 Hz Averaging time 30 min Data logger CR1000 (Campbell Scientific Inc.), CR6 (Campbell Scientific Inc.) Data storage SD card Original data Raw data
Observation items Levels/ Depth Instrument Global solar radiation(incoming) 1.9 m Net radiometer (CNR1, Campbell Scientific Inc.) Global solar 1.9 m Net radiometer (CNR1, Campbell Scientific Inc.) Long-wave radiation(incoming) 1.9 m Net radiometer (CNR1, Campbell Scientific Inc.) Long-wave radiation(outgoing) 1.9 m Net radiometer (CNR1, Campbell Scientific Inc.) Net radiation - PPFD (incoming) 1.93 m Pyranometer (CPR-PAR-01, Climatec) PPFD (outgoing) - Direct / diffuse radiation - Direct / diffuse PPFD - Air temperature 1.95 and 1.63 m Ventilated temperature and humidity sensor Humidity 1.95 and 1.63 m Ventilated temperature and humidity sensor Soil temperature 2, 5, 10, 20, and 30 cm Thermocouple at two locations Soil heat flux - Soil water 5 cm Water content reflectometer (CS616 Campbell Scientific Inc.) at two locations Wind speed 2.3 m Sonic anemometer (CSAT3, Campbell Scientific) Wind direction 2.3 m Sonic anemometer (CSAT3, Campbell Scientific) Barometric 2.3 m Barometer (EC150, Campbell Scientific Inc.,) Precipitation 2.2 m Tipping bucket rain- gauge (model 52202, Young) CO2 concentration 2.3 m IRGA (EC150, Campbell Scientific Inc.,) Water Table Pressure water gauge (HTV010-KP, SENSEZ) Soil O2 concentration 10 and 30 m Galvanic-cell type oxygen sensor (KE-25, GS-Yuasa) Snow Depth Ultrasonic distance meter (SR50A, Campbell Scientific Inc.)
Fluxes of non-CO2 gases Gas CH4 Method Open-path eddy covariance using LI-7700 (Li-Cor) Measurement height 2.3 m Data logger CR6 (Campbell Scientific Inc.,) Data storage SD card
Other Phenology Garden Watch Camera LAI Periodically using a plant canopy analyzer (LAI-2000)
Observation Period and data Availability Measurement Period from May 2012 to present Measurement Frequency 10Hz Data Availability -
Contact Masahito Ueyama (miyabi-flux [at] muh.biglobe.ne.jp) Takashi Hirano (hirano [at] env.agr.hokudai.ac.jp) Yasuhiro Kominami (comy [at] affrc.go.jp) Tomotsugu Yazaki (yazakitm [at] env.agr.hokudai.ac.jp)
Infrastructure Electric Power:(100V AC 50Hz)
URL Nagata, O., Takai, F., Hatano, R. (2005) Effect of Sasa Invasion on global warming potential in Sphagnum dominated poor fen in Bibai, Japan, Phyton, 45, 299-307.
