NKS: Nakashibetu Station, NLBC

General site detail (Updated 3 May 2010)
 Site name
 Nakashibetu Station, NLBC
 AsiaFlux site code
 Location Sakuragaoka,Nakashibetu, Hokkaido, Japan
 Position  43° 32´ N, 144° 58´ E (GPS)
 Elevation 50 m above sea level
 Slope -
 Terrain type
 Almost Flat
 Area 250x200m for Chemical fertilizer plot and 250 x 150m for Manure plot (Total area is 8.8 ha)
 Fetch -
 Climate Cool Temperate
 Mean annual air temperature
 5.2 deg (1979 - 2000)
 Mean annual precipitation
 1120 mm (1979 - 2000)
 Vegetation type
 Hay meadow (Chemical fertilizer and Manure plots)
 Domestic species (Overstory)
 Timothy (Phleum pretense L.) 
 Quack grass (Agropyron repens L., P.Beauv) 
 Reed canarygrass (Phalaris arundinacea. L.)
 Dominant species (Understory)
 Canopy height
 Maximum 1.0 m
 Age -
 LAI -
 Soil type
 Andosol (Acrudoxic Virtric Melanudand)

Eddy Covariance method (CO2)
 System Open-path system 
 Wind speed 
 Sonic anemometer-thermometer (CSAT3, Campbell, USA)
 Air temperature
 Sonic anemometer-thermometer (CSAT3, Campbell, USA)
 Water vapor
 Measurement height
 2.5 m
 Sampling frequency
 10 Hz
 Averaging time
 30 min
 Data logger
 CR23X-4M, cambell, USA
 Data storage
 Original data
 Raw data

 Observation items
  Levels/ Depth
 Global solar radiation(incoming)
 Global solar 
radiation (outgoing)
 Long-wave radiation(incoming) 
  Long-wave radiation(outgoing) - 
 Net radiation
 PPFD (incoming)
  1.6 m Quantum sensor (LI-COR LI-190SA)
 PPFD (outgoing)
  1.6 m Quantum sensor (LI-COR LI-190SA)
 Direct / diffuse radiation
 Direct / diffuse PPFD
 Air temperature
 2.5 m Ventilated Pt resistance thermometer  (HMP-45A, VAISALA) at mature field
 Humidity 2.5 m 
 Capacitive hygrometer
 Soil temperature
 -0.1, -0.2, -0.3  m T-type thermocouple
 (T-soil4, MeiwaShoji)
 Soil heat flux
 Soil water 
 -0.1, -0.2, -0.3  m (EC20, DECAGON)
 Wind speed
 2.5 m 
 Sonic anemometer-thermometer
 (CSAT3, Campbell)
 Wind direction
 2.5 m Sonic anemometer-thermometer
 (CSAT3, Campbell)
 2.5 m Sonic anemometer-thermometer
 (CSAT3, Campbell)
 Precipitation - 
 Soil respiration
 Static closed chamber
 Methane (CH4) Static closed chamber (biweekly)
 since 2004-
 Nitrous oxide (NO2) Static closed chamber (biweekly)
 since 2004-

Observation Period and data Availability

 Measurement Period
 From September 2004 to present
 Measurement Frequency
 Data Availability
 Takehiko MATSUMOTO (matsumoto-takehiko [at] hro.or.jp)
 Local Independent Administrative Agency Hokkaido Research  Organization.Agricultural Research DepartmentKONSEN Agricultural  Experiment StationAsahigaoka7,Nakashibetu,Hokkaido 
 TEL : + 81-153-72-2843 FAX : + 81-153-73-5329
 Takatoshi ARITA (arita-takatoshi [at] hro.or.jp)
 Hokkaido Konsen Agricultural Experiment Station,  Asahigaoka7,Nakashibetu,Hokkaido 086-1135,Japan 
 TEL : + 81-153-72-2843 FAX : + 81-153-73-5329
 2.5m high tower, AC 100V

 Research Fund
 Research grants from Racing and Livestock Association organized by  Japan Grassland Agriculture & Forage Seed Association for the  Greenhouse Gas Emissions Mitigation Project in Japanese  Grasslands