BKS:Bukit Soeharto

General site detail (Updated 2 June 2008)
 Site name
 Bukit Soeharto
 AsiaFlux site code
 Location Bukit Soeharto Education Forest of Mulawarman  University, Bukit Soeharto, East Kalimantan,  Indonesia
 Position 0º 51' 41" S, 117º 02' 41" E (WGS84)
 Elevation 20 m above sea level (WGS84)
 Slope -
 Terrain type
 Approximately flat
 Area 40 ha
 Fetch 200 ~ 500 m (depending on wind direction)
 Climate Tropical - fully humid (Af)
 Mean annual air temperature
 27 degree C
 Mean annual precipitation
 3300 mm
 Vegetation type
 Tropical secondary forest
 Domestic species (Overstory)
 Macaranga gigantea
 Dominant species (Understory)
 Canopy height
 9m (2001Jul), 10.6m (2002Nov), 12.4 (2004Feb)
 Age In 1998, second-growth forest disappeared by forest  fire produced by ENSO. The forest has re-grown.
 LAI 3.0 m2 m-2 (PAI)
 Soil type
 Typic Paleudults (US Soil Taxonomy)

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
 about 15m, north side ( -2001.1.15)about 15m, south-east  side(2001.15-2002.2.6)14.2m south-east side (2002.2.6-
 2002.9.10)18.4m south-east side (2002.9.10-2004.12.31)
 Sampling frequency
 10 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)
 30m Radiometer (CNR1, Kipp&Zonen)
 Global solar 
radiation (outgoing)
 30m Radiometer (CNR1, Kipp&Zonen)
 Long-wave radiation(outgoing) 
 30m Radiometer (CNR1, Kipp&Zonen)
 Long-wave radiation(outgoing) 
 30mRadiometer (CNR1, Kipp&Zonen)
 Net radiation
 30m Radiometer (CNR1, Kipp&Zonen)
 PPFD (incoming)
 30,1 m
 Quantum sensor (ML-020V, Eko, Japan)
 PPFD (outgoing)
 30m Quantum sensor (ML-020V, Eko, Japan)
 Direct / diffuse radiation
 30m Pyranometer (ML-020V, Eko, Japan)
 Direct / diffuse PPFD
 30m Pyranometer (ML-020V, Eko, Japan)
 Air temperature
 30, 10, 5 m 
 Platinum resistance thermometer and capacitive  hygrometer (HMP45A, Vaisala)
 Humidity 30, 10, 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
 30m Combined wind vane and fan anemometer
 (Met One, Campbell)
 Wind direction
 30m Combined wind vane and fan anemometer
 (Met One, Campbell)
 Precipitation - Tipping-bucket rain gauge (TE525, Campbell)
 30,10,5m  Closed-path infrared gas analyzer
 (LI-6262, LI-COR)
 Radiation Temperature
 Infrared thermometer (IT-340, Horiba, Japan)
 Soil respiration
 hamber method(Licor-800), Frequency : Once a week
 Ecological investigation
 Frequency : Once a year
Observation Period and Data Availability
 Measurement Period
 from 8 December 1999 to  December 2004
 Measurement Frequency
 Data Availability 2001-2002 in AsiaFlux Database
 Takahisa Maeda (takahisa.maeda [at] aist.go.jp) 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
 [Flux, Soil respiration] Warsudi, PPMT UNMUL, Indonesia
 [Ecological Investigation] Tsuyoshi Toma,
 Forestry and Forest Products Research Institute, Tsukuba, Japan
 Tower, Electrical power (Solar cell system)
Research Fund
 Global Environment Research Fund S-1 (FY2003-2006) by Ministry of  Environment, Japan