NCT:Nam Cat Tien Forest

Gengeral site detail (Updated 12 September 2012)
 Site name
 Nam Cat Tien Forest
 AsiaFlux site code
 NCT
 Location Vietnam
 Position 11º 26' 29.9" N, 107º24' 3.8" E
 Elevation 156 m above sea level
 Slope Negligible
 Terrain type
 Flat
 Area 38,302 ha (area of Nam Cat Tien)
 Fetch 500-700 m
 Climate Tropical monsoon climate (Am)
 Mean annual air temperature
 26.2 degree C
 Mean annual precipitation
 2470 mm
 Vegetation type
 Tropical monsoon valley tall-stand forest
 Domestic species (Overstory)
 Lagestroemia caluculata, Afzelia xylocarpa,  Sindora siamensis, Tetrameles nudiflora, Hopea  odorata, Haldina (syn.Adina) cordifolia, Aglaia sp.,  Ficus spp., Sterculia cf. cochinchinensis.
 Dominant species (Understory)
 Achasma cf. macrocheilos, Globba cf.pendula,  Stachlianthus campanulatus, Zingiber gramineum,  Alpinia sp., Zingiber sp.Aglaonema fumeum,  Amorphophallus opertus, Pseudodracontium  latifolium, Bolbitis annamensis, Dianella nemorosa,  Leea cf. rubra, Peliosanthes teta, Pellionia cf.  deveauana, Pseuderantemum  crenulatum,  Strobilanthes sp., Clerodendrum sp.,  Commelina  sp.,Murdannia sp., Pandanus sp.,  Selaginella spp.
 Canopy height
 About 35 m
 Age About 200 years old
( the age of the oldest trees is 600-800 years old)
 LAI N/A
 Soil type
 Dystric Cambisols

Observations
Eddy Covariance method (CO2)
 System Open-path system(CO2, latent, sensible heat fluxes)
 Wind speed
 Three-dimensional sonic anemometer-thermometer
 (CSAT3, Campbell Scientific Inc., USA)
 Air temperature
 Three-dimensional sonic anemometer-thermometer
 (CSAT3, Campbell Scientific Inc., USA)
 Water vapor
 Open-path CO2/H2O analyzer (LI-7500, LI-COR Inc., USA)
 CO2 Open-path CO2/H2O analyzer (LI-7500, LI-COR Inc., USA)
 Measurement height
 50 m
 Sampling frequency
 10 Hz
 Averaging time
 30 min
 Data logger
 Micrologger (CR3000, Campbell Scientific Inc., USA)
 Data storage
 Compact Flash Module
 (CFM100, Campbell Scientific, USA)
 Original data
 Raw data

Meteorology
 Observation items
  Levels/ Depth
 Instrument 
 Global solar radiation(incoming)
 50 m 4-Component Net Radiation Sensor 
 (NR01, Hukseflux, Netherlands)
 Global solar 
radiation (outgoing)
 50 m 4-Component Net Radiation Sensor 
 (NR01, Hukseflux, Netherlands)
 Long-wave radiation(outgoing) 
 50 m 4-Component Net Radiation Sensor 
 (NR01, Hukseflux, Netherlands)
 Long-wave radiation(outgoing) 
 50 m 4-Component Net Radiation Sensor 
 (NR01, Hukseflux, Netherlands)
 Net radiation
 50 m 4-Component Net Radiation Sensor 
 (NR01, Hukseflux, Netherlands)
 PPFD (incoming)
 50, 2 m Quantum sensor (LI-190B, LI-COR, USA)
 PPFD (outgoing)
 - 
 Direct / diffuse radiation
 - 
 Direct / diffuse PPFD
 - 
 Air temperature
 50, 28, 19, 10,  5, 2, 1, 0.3 m At 50 m - Temperature/RH Probe  (HMP45C-  L240, Vaisala, Finland); at  other levels -  Temperature sensors (108-L,  Campbell  Scientific, USA)
 Humidity 50, 2 m 
 At 50 m-Temperature/RH Probe  (HMP45C-L240,  Vaisala, Finland) ; 
 at 2 m - Temperature and Relative  Humidity   
 Sensor (CS215, Campbell  Scientific, USA)
 Soil temperature
 0.05, 0.2, 0.3,  0.5 m (three  sets) Temperature sensors
 (108-L, Campbell Scientific, USA)
 Soil heat flux
 0.08 m (seven  points) Heat Flux Plate
 (HFP01,Hukseflux, Netherlands)
 Soil water 
 content 
 0.05, 0.2, 0.3,  0.5 m  (three  sets) Water content reflectometers
 (CS616, Campbell Scientific, USA)
 Soil matric water potential 0.05 m (three  points)  Soil Matric Potential Block
 (257-L, Campbell Scientific, USA)
 Wind speed
 50 m 
 Three-dimensional sonic anemometer-  thermometer
 (CSAT3, Campbell Scientific Inc., USA)
 Wind direction
 50 m Three-dimensional sonic anemometer-  thermometer (CSAT3, Campbell Scientific  Inc.,  USA)
 Barometric 
 pressure
 50 m LI7550 embedded pressure sensor  (LI7550, LI-  COR Inc., USA)
 Precipitation 50 m Rain Gage
 (TE525MM, Texas  Electronics, USA)
 COconcentration
 46, 28, 19, 10,  5, 2, 1, 0.3 m At 50m - Open-path CO2/H2O analyzer (LI7500,  LI-COR Inc., USA); at other levels - Closed-path  CO2 analyzer (LI-820, LI-COR Inc., USA)
 H2O concentration 50 m Open-path CO2/H2O analyzer (LI-7500, LI-COR  Inc., USA)
Other
 Soil respiration
 weekly manual measurements with use of  closed-circuit chambers
 Photosynthesis -
 Ecological investigation
 Tree heights, diameters, biomass, leaf  transpiration, chlorophyll contents
 
Observation Period and Data Availability
 Measurement Period
 December 2011 to present
 Measurement Frequency
 Continuous
 Data Availability
 N/A
Contact
 Juliya Kurbatova (kurbatova.j[at] gmail.com)
 A.N. Severtsov Institute of ecology and evolution RAS,119071, Russian  Federation, Moscow, Leninskii Pr., 33 
 Tel: +7 495 954 75 53 Fax: +7 495 954 55 34
  [Ecological survey] Nguyen Dang Hoi (danghoi110[at]gmail.com)
 Vietnam - Russian Tropical Scientific Research and Technological  Center (Tropical Center)Nguyen Van Huyen, Nghia Do, Cau Giay,  Hanoi, Vietnam
 Tel: +84 04 3756 2286 Fax: +84 04 3756 2286
 [Flux and micrometeorology] Dinh Ba Duy (duydb.vrtc[at]gmail.com);  Olga Kuricheva (olga.alek.de[at] mail.com);
 [soil respiration, technical support] Vitaly Avilov (vitavilov[at]gmail.com)
Infrastructure
 Electrical power (solar panels), Facilities for communication (3G  available), Accommodation (available)
Publication
 O.A. Deshcherevskaya, V.K. Avilov, Ba Duy Dinh, Cong Huan Tran, J.A. Kurbatova. Modern Climate of the Cát Tiên National Park (Southern Vietnam): Climatological Data for Ecological Studies. Izvestiya, Atmospheric and Oceanic Physics. Vol. 49, No. 8, 2013, pp. 819–838. Pleiades Publishing, Ltd., 2013.