Estimating Canopy Gross Primary Production Using Phloem Stable Isotopes and Sap Flux

A boreal Scots pine forest in northern Sweden provides the location for this dataset comparing methods for estimating Gross Primary Production (GPP). The dataset likely contains daily-resolution GPP estimates derived from a sap flux/isotope method (GPPiso/SF), which are compared against model-derived GPP from PRELES. The data was produced by Antoine Vernay of the Swedish University of Agricultural Sciences.

Use Cases

• Comparing canopy GPP estimation methods based on the described sap flux/isotope technique.
• Analyzing the impact of nitrogen fertilization on forest carbon production based on the fertilized and reference plot comparison.
• Validating eddy covariance-derived models using an independent method based on canopy and mesophyll conductance corrections.
• Studying daily and annual variations in forest carbon uptake based on the daily-resolution GPP estimates.

Strengths

• The method comparison includes data from both a nitrogen fertilized plot and a reference plot.
• The GPPiso/SF method is described as an alternative applicable without terrain restrictions where eddy covariance assumptions are not met.
• Estimates are provided at daily resolution for stand-scale analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Swedish University of Agricultural Sciences

Collection Method

Field measurements combining sap flux data and stable carbon isotope analysis of phloem contents.

Geography

Boreal Scots pine forest in northern Sweden