Site name	Mymensingh Flux Study Site
AsiaFlux site code	MYM
Location	Mymensingh, Bangladesh
Position	24º 43′31.0″N, 90º 25′27.3″E (GARMIN)
Elevation	18 m above sea level (UNDP and FAO, 1988)
Slope	-
Terrain type	Flat
Area	78.28 ha
Fetch	>300 m to the south of the mast, >500 m to the  west of the mast, and about 200 m to the north and  east of the mast. A two-storeyed small house of  weather station and its yard are located about 180  m to NE of the mast. Another one-storeyed small  house of irrigation facility is located about 150 m to  ENE of the mast. One-storeyed houses of  agricultural farm are located about 150 m to NW of  the mast.
Climate	Tropical monsoon climate
Mean annual air temperature	25.5 degC (Weather Yard, BAU 2005-2006)
Mean annual precipitation	2353.3 mm (Weather Yard, BAU 2005-2006)
Vegetation type	paddy field
Domestic species (Overstory)	rice (Oryza sativa L)
Dominant species (Understory)	-
Canopy height	Variable with season from zero to 1.2 m.
Age	-
LAI	About 5.5 m2 m-2 (maximum)
Soil type	Non-calcareous dark-grey floodplain soil  (UNDP and FAO, 1988)

Observations
Eddy Covariance method (CO₂)

System	Open-path system
Wind speed	Three-dimensional sonic anemometer  (HS, Gill Instruments, UK)
Air temperature	Three-dimensional sonic anemometer  (HS, Gill Instruments, UK)
Water vapor	Open-path infrared gas analyzers  (LI-7500, LI-COR, Lincoln, NE, USA)
CO2	Open-path infrared gas analyzers  (LI-7500, LI-COR, Lincoln, NE, USA)
Measurement height	2.95 m
Sampling frequency	10 Hz
Averaging time	30 min
Data logger	CR1000X (Campbell Scientific, Logan, UT, USA)
Data storage	FC
Original data	Raw data

Meteorology

Observation items	Levels/ Depth	Instrument
Global solar radiation(incoming)	3.0 m	Pyranometer (MS-62, Eko, Tokyo, Japan)  Four component net radiometer  (MR-40, Eko,  Tokyo, Japan)
Global solar  radiation (outgoing)	3.0 m	Four component net radiometer  (MR-40, Eko, Tokyo, Japan)
Long-wave radiation(incoming)	3.0 m	Four component net radiometer  (MR-40, Eko, Tokyo, Japan)
Long-wave radiation(outgoing)	3.0 m	Four component net radiometer  (MR-40, Eko, Tokyo, Japan)
Net radiation	3.0 m	Four component net radiometer  (MR-40, Eko, Tokyo, Japan)
PPFD (incoming)	2.95 m	Quantum sensor  (LI-190, LI-COR, Lincoln, NE, USA)
PPFD (outgoing)	Below canopy	Quantum sensor  (LI-191, LI-COR, Lincoln, NE, USA)
Transmitted PPFD	2.95 m	Quantum sensor  (LI-190, LI-COR, Lincoln, NE, USA)
Direct / diffuse radiation	-
Direct / diffuse PPFD	-
Air temperature	1.65, 2.95 m	Platinum resistance thermometer  (HMP45A, Vaisala, Helsinki, Finland)
Humidity	1.65, 2.95 m	Humicap (HMP45A, Vaisala, Helsinki, Finland)
Soil temperature	0, 0.05, 0.1,  0.2, 0.4 m   (five points)	T-type thermocouple
Soil heat flux	0.05 m  (three points)	Heat flux plate (MF-180M, Eko, Tokyo, Japan)
Soil water   content	0.05 m (three  points), 0.1,  0.2, 0.3 m	TDR  (TDR100, Campbell Scientific, Logan, UT, USA)
Field water level	Two points	Capacitive water depth probe  (model 6521, Unidata, Australia)
Water temperature	0.02, 0.05 m	Type-T thermocouple
Barometric   pressure	N/A	Silicon capacitive pressure sensor  (PTB210, Vaisala, Helsinki, Finland)
Precipitation	N/A	Tipping bucket rain gauge  (TR-525M-R2, Texas Electronics, Inc., USA)
CO2 concentration	-

Other

Soil respiration	-
Photosynthesis	-
Ecological investigation	Plant heights, dry matter content, leaf  area index (LAI)