Site name	Mae Klong
AsiaFlux site code	MKL
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)

Observations
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

Meteorology

Observation items	Levels/ Depth	Instrument
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 m	Radiometer (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   content	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)
CO2 concentration	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)

Other

Soil respiration	Chamber method, frequency:hourly
Ecological investigation	-