NCT: Nam Cat Tien Forest
General site details
| 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 |
| Dominant 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 |
Observation
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,/H2,O analyzer (LI-7500, LI-COR Inc., USA |
| CO2 | Open-path CO2,/H2,O 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) |
| CO2 concentration | 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.