MKL: Mae Klong

Gengeral site detail (Updated 26 May 2008)
 Site name
 Mae Klong
 AsiaFlux site code
 Location MaeKlong Watershed Research Station, Thailand
 Position 14º 34' 34.6" N, 98º 50' 38.0" E (WGS84)
 Elevation 231 m above sea level (WGS84)
 Slope -
 Terrain type
 on the ridge
 Area -
 Fetch -
 Climate monsoon (Am)
 Mean annual air temperature
 25 degree C
 Mean annual precipitation
 1500 mm
 Vegetation type
 Tropical seasonal deciduous forest
 (Mixed Deciduous Forest MDF)
 Domestic species (Overstory)
 Shorea siamensis, Vitex peduncularis,
 Xylia xylocarpa
 Dominant species (Understory)
 Canopy height
 30 m
 Age About 30 years in 2008
 LAI 2-3 m2 m-2 (PAI)
 Soil type
 Kandiustalfs (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
 42 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)
 42 m Radiometer (CNR1, Kipp&Zonen)
 Global solar 
radiation (outgoing)
 42 m Radiometer (CNR1, Kipp&Zonen)
 Long-wave radiation(outgoing) 
 42 m Radiometer (CNR1, Kipp&Zonen)
 Long-wave radiation(outgoing) 
 42 mRadiometer (CNR1, Kipp&Zonen)
 Net radiation
 42 m Radiometer (CNR1, Kipp&Zonen)
 PPFD (incoming)
 42,1 (two  points) m
 Quantum sensor (ML-020V, Eko, Japan)
 PPFD (outgoing)
 42 m Quantum sensor (ML-020V, Eko, Japan)
 Direct / diffuse radiation
 42 m Pyranometer (ML-020V, Eko, Japan)
 Direct / diffuse PPFD
 42 m Pyranometer (ML-020V, Eko, Japan)
 Air temperature
 42 (tree points),  30 m Platinum resistance thermometer and capacitive  hygrometer (HMP45A, Vaisala)
 Humidity 42 (tree points),  30 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 
10, 50 cm Water content reflectometer (CS615, Campbell)
 Wind speed
 45 m Combined wind vane and fan anemometer
 (Met One, Campbell)
 Wind direction
 45 m Combined wind vane and fan anemometer
 (Met One, Campbell)
 Precipitation - Tipping-bucket rain gauge (TE525, Campbell)
 Till 2003.3.3:  (45, 42, 30, 21,  12 m) After  2003.3.3:(45,  42, 20, 12, 6 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 2001 to present (Meteorology  October 1998-present)
 Measurement Frequency
 Data Availability 2003-2004 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, 919
 [Photosynthesis] Atsushi Ishida (atto [at]
 Forestry and Forest Products Research Institute, Tsukuba, Japan
 Other[Photosynthesis, Ecological Investigation] 
 Sapit Diloksumpun, Kasetsart University, Bangkok, Thailand
 Tower, Electrical power (AC, commercial), Accommodation (available)
Research Fund
 Research Fund (FY1992-2000) by Since and Technology Agency Japan
 Global Environment Research Fund S-1 (FY2003-2006) by Ministry of  Environment, Japan