MKL: Mae Klong
General site details
| 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) |
| Dominant 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) |
Observation
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 | - |
Observation Period and Data Availability
| Measurement Period | from 2001 to present (Meteorology October 1998-present) |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | 2003-2004 in AsiaFlux Database |
Contact
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
[Soil respiration] Samreong Panuthai (newsam [at] truemail.co.th) 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] ffpri.affrc.go.jp) Forestry and Forest Products Research Institute, Tsukuba, Japan
Other[Photosynthesis, Ecological Investigation] Sapit Diloksumpun, Kasetsart University, Bangkok, Thailand
Infrastructure
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