DTT: Diverse land-cover site at Tak, Thailand
General site details
| Site name | Diverse land-cover site at Tak, Thailand |
|---|---|
| AsiaFlux site code | DTT |
| Location | Tak, Thailand |
| Position | 16º'56’23.3”N, 99°25’47.6”E |
| Elevation | 120 m above sea level |
| Slope | 0-1 deg |
| Terrain type | Flat |
| Area | within a radius of 10 km |
| Fetch | over 10km |
| Climate | Tropical savanna climate |
| Mean annual air temperature | 22ºC |
| Mean annual precipitation | 1100mm |
| Vegetation type | Tectona, Shorea and Dipterocarpus in case of forest and paddy, cassava, corn et al. |
| Dominant Species (Overstory) | Tectona, Shorea and Dipterocarpus, paddy, cassava, corn et al. |
| Dominant Species (Understory) | N/A |
| Canopy height | 0 - 25 m |
| Age | About 20 years in 2011 |
| LAI | 0-5 |
| Soil type | N/A |
Observation
Eddy Covariance method (CO2)
| System | Open-path system |
|---|---|
| Wind speed | Three dimensional sonic anemometer (CSAT3, Campbell scientific) |
| Air temperature | Three dimensional sonic anemometer (CSAT3, Campbell scientific) |
| Water vapor | Open-path analyzer (LI-7500, LI-COR, USA) |
| CO2 | Open-path analyzer (LI-7500, LI-COR, USA) |
| Measurement height | 20, 30, 100 m |
| Sampling frequency | 10 Hz |
| Averaging time | 1 hour |
| Data logger | CR5000 (Campbell, USA) |
| Data storage | CF |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 2 m | CNR1 (Kipp & Zonen, The Netherlands) |
| Global solar radiation (outgoing) | 2 m | CNR1 (Kipp & Zonen, The Netherlands) |
| Long-wave radiation(incoming) | 2 m | CNR1 (Kipp & Zonen, The Netherlands) |
| Long-wave radiation(outgoing) | 2 m | CNR1 (Kipp & Zonen, The Netherlands) |
| Net radiation | 2 m | CNR1 (Kipp & Zonen, The Netherlands) |
| PPFD (incoming) | - | |
| PPFD (outgoing) | - | |
| Direct / diffuse radiation | - | |
| Direct / diffuse PPFD | - | |
| Air temperature | 2, 20, 30, 45, 60, 100 m | HMP45A, VAISALA, Finland |
| Humidity | 2, 20, 30, 45, 60, 100 m | HMP45A, VAISALA, Finland |
| Soil temperature | 0.05 m | Platinum resistance thermometer |
| Soil heat flux | 0.05 m | MF81 (EKO, Japan) |
| Soil water content | 0.05 m | TDR sensor (CS615, Campbell, USA) |
| Wind speed | 2, 20, 30, 45, 60, 100 m | Wind sensor (Wind Monitor 05103, RM Young, USA) |
| Wind direction | 2, 20, 30, 45, 60, 100 m | Wind sensor (Wind Monitor 05103, RM Young, USA) |
| Barometric pressure | - | |
| Precipitation | 1, 0.2 m | TE525MM (Campbell scientific), 34-T (OTA) |
| CO2 concentration | 20, 30, 100 m | Open-path CO2/H2O analyzer (LI-7500 LI-COR, USA) |
| H2O concentration | 20, 30, 100 m | Open-path CO2/H2O analyzer (LI-7500 LI-COR, USA) |
Other
| Soil respiration | - |
| Photosynthesis | - |
| Ecological investigation | - |
Observation Period and Data Availability
| Measurement Period | From 2003 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Wonsik Kim (wonsik [at] affrc.go.jp) National Institute for Agro-Environmental Sciences3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan Tel : +81-29-838-8210
Taikan Oki (taikan [at] iis.u-tokyo.ac.jp) Daisuke Komori (d-komori [at] iis.u-tokyo.ac.jp) Institute of Industrial Science, The University of Tokyo4-6-1 Komaba, Meguro, Tokyo 153-8505, Japan Tel: +81-3-5452-6382 Fax: +81-3-5452-6383
Panya Polsan (ppolsan [at] gmail.com) Hydrology and Water Management Center Lower Northern Eastern Regional453 Moo 10 Mittaphap Road Tambol Kokkruat Muang DistrictNakhonratchasima 30280
Infrastructure
Tower, Electrical power (AC)
Calibration Information
Open-path analyzers were calibrated approximately two years by LI-COR.