NKS: Nakashibetu Station, NLBC
General site details
| Site name | Nakashibetu Station, NLBC |
|---|---|
| AsiaFlux site code | NKS |
| 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) |
| Dominant 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) |
Observation
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 | NDIR (LI-7500, LICOR, USA) |
| CO2 | NDIR (LI-7500, LICOR, USA) |
| Measurement height | 2.5 m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | CR23X-4M, cambell, USA |
| Data storage | CF |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| 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 (HMP45A, VAISALA) |
| Soil temperature | -0.1, -0.2, -0.3 m | T-type thermocouple (T-soil4, MeiwaShoji) |
| Soil heat flux | - | |
| Soil water content | -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) |
| Barometric pressure | 2.5 m | Sonic anemometer-thermometer (CSAT3, Campbell) |
| Precipitation | - | |
| CO2 concentration | - |
Other
| 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 | Continuous |
| Data Availability | N/A |
Contact
Takehiko MATSUMOTO (matsumoto-takehiko [at] hro.or.jp) Local Independent Administrative Agency Hokkaido Research Organization.Agricultural Research DepartmentKONSEN Agricultural Experiment StationAsahigaoka7,Nakashibetu,Hokkaido 086-1135,Japan 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
Infrastructure
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