AmeriFlux eddycovariance data for CO2, water and energy exchange between the terrestrial biosphere and the atmosphere
La Selve
Costa Rica
Tropical Wet Forest
Key Investigators/Institutional Affiliations:
* Steven F. Oberbauer - Florida International University - DOE (TECO), NSF (Ecosystem Studies)
* Deborah A. Clark - University of Missouri, St. Louis - DOE (TECO), NSF (Ecosystem Studies)
* David B. Clark - University of Missouri, St. Louis - DOE (TECO), NSF (Ecosystem Studies)
* Edzo Veldkamp - University of Gottenberg, Deutschland - DOE (TECO)
* Web-Link
Location/Principal biome/main communities:
* Located at: 10 degrees 26 min Latitude (N), 83 degrees 59 min Longitude (W)
* Elevation: 100-300 m (above msl)
* Precipitation: 4 m annually; Mean monthly temperature: 25.8 degrees C
* Slope / Exposure
* Canopy height: average 21 m
* Canopy roughness
Since:
* Start-up is January 5th 1998
Research topics:
* Quantification of sources and sinks of CO2 in terrestrial ecosystems
* Investigate cause of large annual variation in tree diameter growth
* Extension of annual tree growth measurements to forest wide plots
Instrumentation:
* Top of tower =
* Eddy Covariance system-3d sonic anemometer (K-probe, ATI,
Boulder, CO) and a closed path IRGA (model 6262, Li-Cor, Linclon, NE)
Profile System-closed path IRGA (model 6262, Li-Cor, Lincon, NE),
inlets at 6 heights (0.5, 6.8, 11.5, 16, 20.5, and 27m) with co-located
RTD's. Automated switching is at 5 minute intervals. Both systems have
span gases and zero air cycled through the IRGA's 4-times daily to check
for drift.
Core Measurements:
* CO2 flux units (g CO2 m-2 day-1)
* sensible heat flux (W m-2)
* latent heat flux (W m-2)
Ancillary Measurements:
* Biomass (kg/ha)
* Leaf Area Index (hemispherical photography (LAI-2000)
* Litter collection
* Soil carbon turnover
* Soil respiration
* Canopy sapflow
* Coarse woody debris
* Fine root production and turnover
* Soil texture and NPK for the whole La Selva gridposts (1300+ samples)