DTT: Diverse land-cover site at Tak, Thailand

General site detail (Updated 30 May 2011)
 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.
 Domestic 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

Observations
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)
 COconcentration
 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
Calibration Information
 Open-path analyzers were calibrated approximately two years by
 LI-COR.
Infrastructure
 Tower, Electrical power (AC)