Field Measurements of Photosynthetic Biochemistry Provide Improved Representation of Gas-Exchange in ESMs

September 1st, 2017
The Science: 

Photosynthesis, specifically the carboxylation rate and electron transport on forbs, grasses, sedges, and shrubs, were made throughout five years. Traits could be assigned to plant functional types used in land surface models (e.g. ALM)

The Impact: 

Photosynthesis, specifically the carboxylation rate and electron transport on forbs, grasses, sedges, and shrubs, were made throughout five years. Traits could be assigned to plant functional types used in land surface models (e.g. ALM)

Summary: 

Provides the first dataset on photosynthetic capacity for understanding physiology of cold-adapted species in the Arctic. Photosynthesis is inadequately described due to a low leaf nitrogen content and the fraction of that nitrogen partitioned to Rubisco. Productivity is underestimated in this globally important and climatically-sensitive biome.

 

 

 

 

 

 

Carboxylation capacity measured on Arctic vegetation at NGEE Arctic field sites outside Barrow, AK