MYM: Mymensingh Flux Study Site
General site details
| 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 |
| Dominant 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) |
Observation
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) |
| 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) |
Observation Period and Data Availability
| Measurement Period | From February 2006 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | http://ecomdb.niaes.affrc.go.jp/e_level_page.php?select_area=1049&select_site=1138 |
Contact
Md. Abdul Baten (baten_envsc [at] yahoo.com) Department of Environmental Science,Bangladesh Agricultural University, Mymensingh 2202. Tel: +880-91-55695~7 Ext. 2570 (Office)
Rehana Khatun (rehana_envsc [at] yahoo.co.uk) Department of Environmental Science,Bangladesh Agricultural University,Mymensingh 2202
Infrastructure
Tower: None (Mast: 2), Electrical power: 220 VAC, Facilities for communication: Internet is available at BAU, Accommodation: International Guest house of BAU, 2 km from the site
Research Fund
Special Coordination Funds for the Promotion of Science and Technology by Japanese Ministry of Education, Culture, Sports, Science and Technology (FY2006-2008)JSPS-UGC Joint Research Program by Japan Society for Promotion of Science (FY2005-2006)
Calibration Information
Open-path analyzer is calibrated approximately every one year with standard CO2 gases and a dew point generator (LI610, LI-COR).