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Comparison of ecosystem water flux measured with the Eddy covariance- and the direct xylem sap flux method in a mountainous forest

Abstract

The Eddy covariance technique allows to measure different components of turbulent air fluxes, including the flow of water vapour. Sap flux measurements determine directly the water flow in tree stems. We compared the water flux just above the crowns of trees in a forest by the technique of Eddy covariance and the water flux by the xylem sap flux method. These two completely different approaches showed a good qualitative correspondence. The correlation coefficient is 0.8. With an estimation of the crown diameter of the measured tree we also find a very good quantitative agreement. (author) 3 figs., 5 refs.
Authors:
Stefanicki, G; Geissbuehler, P; Siegwolf, R [1] 
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Publication Date:
Aug 01, 1999
Product Type:
Technical Report
Report Number:
ETDE-CH-9901
Reference Number:
SCA: 540220; PA: CH-99:0E0050; EDB-99:093482; SN: 99002111492
Resource Relation:
Other Information: PBD: 1999; Related Information: Is Part Of Paul Scherrer Institute Scientific Report 1998. Volume V: General Energy; Daum, C.; Leuenberger, J. [eds.]; PB: 121 p.
Subject:
54 ENVIRONMENTAL SCIENCES; DATA COVARIANCES; EXPERIMENTAL DATA; PLANT SAP; PROGRESS REPORT; TREES; TURBULENCE
OSTI ID:
685707
Research Organizations:
Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1423-7342; Other: ON: DE99754426; TRN: CH99E0050
Availability:
OSTI as DE99754426
Submitting Site:
CH
Size:
pp. 98-99
Announcement Date:

Citation Formats

Stefanicki, G, Geissbuehler, P, and Siegwolf, R. Comparison of ecosystem water flux measured with the Eddy covariance- and the direct xylem sap flux method in a mountainous forest. Switzerland: N. p., 1999. Web.
Stefanicki, G, Geissbuehler, P, & Siegwolf, R. Comparison of ecosystem water flux measured with the Eddy covariance- and the direct xylem sap flux method in a mountainous forest. Switzerland.
Stefanicki, G, Geissbuehler, P, and Siegwolf, R. 1999. "Comparison of ecosystem water flux measured with the Eddy covariance- and the direct xylem sap flux method in a mountainous forest." Switzerland.
@misc{etde_685707,
title = {Comparison of ecosystem water flux measured with the Eddy covariance- and the direct xylem sap flux method in a mountainous forest}
author = {Stefanicki, G, Geissbuehler, P, and Siegwolf, R}
abstractNote = {The Eddy covariance technique allows to measure different components of turbulent air fluxes, including the flow of water vapour. Sap flux measurements determine directly the water flow in tree stems. We compared the water flux just above the crowns of trees in a forest by the technique of Eddy covariance and the water flux by the xylem sap flux method. These two completely different approaches showed a good qualitative correspondence. The correlation coefficient is 0.8. With an estimation of the crown diameter of the measured tree we also find a very good quantitative agreement. (author) 3 figs., 5 refs.}
place = {Switzerland}
year = {1999}
month = {Aug}
}