Nocturnal transpiration in riparian Tamarix thickets authenticated by sap flux, eddy covariance and leaf gas exchange measurements

Running head: Sap flow in riparian trees Transpiration of cottonwood/willow forest estimated from sap flux

Chemically-resolved aerosol eddy covariance flux measurements

Introduction Conclusions References

First eddy covariance flux measurements by PTR-TOF.

The recently developed PTR-TOF instrument was evaluated to measure methanol fluxes emitted from grass land using the eddy covariance method. The high time resolution of the PTR-TOF allowed storing full mass spectra up to m/z 315 with a frequency of 10 Hz. Three isobaric ions were found at a nominal mass of m/z 33 due to the high mass resolving power of the PTR-TOF. Only one of the three peaks c...

Eddy covariance methane flux measurements over a grazed pasture

Introduction Conclusions References Tables Figures

What the towers don't see at night: nocturnal sap flow in trees and shrubs at two AmeriFlux sites in California.

At the leaf scale, it is a long-held assumption that stomata close at night in the absence of light, causing transpiration to decrease to zero. Energy balance models and evapotranspiration equations often rely on net radiation as an upper bound, and some models reduce evapotranspiration to zero at night when there is no solar radiation. Emerging research is showing, however, that transpiration ...