Enter Note Done
Go to previous page in this tab
Session
  • Presentation | B33M: Tropical Forests Under a Changing Environment III Poster
  • Poster
  • Share Icon
    Bookmark Icon
  • B33M-2042: Gross Primary Production and Solar-Induced Chlorophyll Fluorescence in the La Selva, Costa Rica Tropical Rainforest
    • Schedule
    Notes
  • Board 2042‚ Hall EFG (Poster Hall)
    NOLA CC
    Set Timezone

Generic 'disconnected' Message
Author(s):
Julia Bigwood, University of California Los Angeles (First Author, Presenting Author)
Ulrike Seibt, University of California Los Angeles
Troy Magney, University of Montana
Milagros Rodriguez Caton, nstituto Argentino Nivologia, Glaciología y Ciencias Ambientales (IANIGLA), CCT-CONICET
Diego Dierick, La Selva Biological Station, Organization for Tropical Studies
Sol Cooperdock, University of California Los Angeles
Nicholas Parazoo, Jet Propulsion Laboratory (JPL)
Jochen Stutz, University of California Los Angeles


Tropical forests account for approximately ⅓ of photosynthetic CO2 uptake, making them a substantial contributor to global carbon flux. Constraining the global carbon flux is dependent on quantifying photosynthetic carbon uptake, known as gross primary production (GPP). However, GPP cannot be measured directly, but is estimated by partitioning net ecosystem exchange (NEE) measurements into GPP and ecosystem respiration. NEE can be measured at the canopy scale from eddy covariance (EC) retrievals and partitioned using multiple approaches. Unfortunately, difficulties quantifying GPP aren’t the only challenge: photosynthesis’s response to climate change remains one of the largest uncertainties in future climate projections. Observations are needed to understand which environmental drivers photosynthesis is most sensitive to and how we can expect these to change.


We measured ecosystem exchange of water vapor and CO2 using EC retrievals and a vertical profile on a 57m high tower in La Selva, Costa Rica. GPP was partitioned from EC data and we identified which meteorological parameters photosynthesis is most sensitive to on multiple timescales. Lastly, we compared GPP estimates with SIF to help validate GPP fluxes. Improving our understanding of the environmental drivers of tropical forest photosynthesis will help refine estimates of ecosystem productivity and global carbon flux.




Scientific Discipline
Suggested Itineraries
Neighborhood
Type
Main Session
Discussion