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)
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
Calibration Information
Open-path analyzers were calibrated approximately two years by LI-COR.
