SKR: Sakaerat

Gengeral site detail (Updated 2 June 2008)
 Site name
 AsiaFlux site code
 Location Sakaerat Environmental Research Center,  Sakaerat, Nakonrachasima, Thailand
 Position 14º 29' 32.5" N, 101º 54' 58.7" E (WGS84)
 Elevation 543 m above sea level (WGS84)
 Slope 6m/100m
 Terrain type
 Approximately flat
 Area 78km2
 Fetch -
 Climate Tropical - desert (Aw)
 Mean annual air temperature
 24 degree C
 Mean annual precipitation
 1200-1300 mm
 Vegetation type
 Tropical seasonal evergreen forest
 Domestic species (Overstory)
 Hopea ferrea Pierre
 Dominant species (Understory)
 Canopy height
 35 m
 Age Mature forest
 LAI 3.5-4.0 m2 m-2 (PAI)
 Soil type
 Shallow Stony Ultisols (US Soil Texonomy)

Eddy Covariance method (CO2)
 System Closed-path system
 Wind speed
 Three-dimensional sonic anemometer-thermometer
 (Wind Master, Gill)
 Air temperature
  Three-dimensional sonic anemometer-thermometer
 (Wind Master, Gill) 
 Water vapor
 Closed-path CO2/H2O analyzers (LI-6262, LI-COR)
 CO2 Closed-path CO2/H2O analyzers (LI-6262, LI-COR)
 Measurement height
 45 m
 Sampling frequency
 4 Hz
 Averaging time
 30 min
 Data logger
 NR-1000, Keyence, Japan
 Data storage
 HDD (Laptop PC)
 Original data
 Raw data

 Observation items
  Levels/ Depth
 Global solar radiation(incoming)
 45 m Radiometer (CNR1, Kipp&Zonen)
 Global solar 
radiation (outgoing)
 45 m Radiometer (CNR1, Kipp&Zonen)
 Long-wave radiation(outgoing) 
 45 m Radiometer (CNR1, Kipp&Zonen)
 Long-wave radiation(outgoing) 
 45 m Radiometer (CNR1, Kipp&Zonen)
 Net radiation
 45 m Radiometer (CNR1, Kipp&Zonen)
 PPFD (incoming)
 45, 1
 (two points) m
 Quantum sensor (ML-020V, Eko, Japan)
 PPFD (outgoing)
 45 m Quantum sensor (ML-020V, Eko, Japan)
 Direct / diffuse radiation
 45 m Pyranometer (ML-020V, Eko, Japan)
 Direct / diffuse PPFD
 45 m Pyranometer (ML-020V, Eko, Japan)
 Air temperature
 45, 35, 20, 5 m Platinum resistance thermometer and capacitive  hygrometer (HMP45A, Vaisala)
 Humidity 45, 35, 20, 5 m  Platinum resistance thermometer and capacitive  hygrometer (HMP45A, Vaisala)
 Soil temperature
 1, 5, 10, 20, 50  cm Platinum resistance thermometer
 Soil heat flux
 2 cm
 (two points)
 Soil heat flux plate (MF-81, Eko, Japan)
 Soil water 
10cm, 50cm Water content reflectometer (CS615, Campbell)
 Wind speed
 47 m Combined wind vane and fan anemometer
 (Met One, Campbell)
 Wind direction
 47 m Combined wind vane and fan anemometer
 (Met One, Campbell)
 Precipitation 47 m Tipping-bucket rain gauge (TE525, Campbell)
 45, 35, 20, 5 m  Closed-path infrared gas analyzer
 (LI-6262, LI-COR)
 Radiation  Temperature
 Infrared thermometer (IT-340, Horiba, Japan)
 Soil respiration
 Chamber method, frequency: hourly
 Ecological investigation
Observation Period and Data Availability
 Measurement Period
 from March 2001 to present
 Measurement Frequency
 Data Availability 2001-2003 in AsiaFlux Database
 Takahisa Maeda (takahisa.maeda [at] National Institute of  Advanced Industrial Science and Technology
 16-1 Onogawa, Tsukuba 305-8569, Japan
 Tel : +81-29-861-8418 Fax : 81-29-861-8358
 [Soil respiration] Samreong Panuthai (newsam [at]
 Watershed Conservation and Management Office National Park,
 Wildlife and Plant Conservation Department, Bangkok, Thailand 
 Tel : +66-2-5614292 ext. 918, 920
 [Photosynthesis] Atsushi Ishida, Forestry and Forest Products  Research Institute, Tsukuba, Japan 
 (atto [at]
 Sapit Diloksumpun, Kasetsart University, Bangkok,  Thailand
 [Ecological Investigation]
 Mamoru Kanzaki, Kyoto University,  Kyoto, Japan 
 [Ecological Investigation]
 Hirokiyo Takeda, Kyoto University, Kyoto, Japan
 Tower, Electrical power (Solar cell system), Accommodation 
Research Fund
 Global Environment Research Fund S-1 (FY2003-2006) by Ministry of  Environment, Japan