Article

 

The role of pre-event canopy storage in throughfall and stemflow by using isotopic tracers Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/kw52j993s

Descriptions

Attribute NameValues
Creator
Abstract
  • Stable isotopes can be a valuable tool for tracing the redistribution, storage, and evaporation of water associated with canopy interception of rainfall. Isotopic differences between throughfall and rainfall have been attributed to three mechanisms: evaporative fractionation, isotopic exchange with ambient vapor, and temporal redistribution. We demonstrate the potential importance of a fourth mechanism: rainfall mixing with water retained within the canopy (in bark, epiphytes, etc.) from prior rain events. Amount and isotopic composition (¹⁸O and ²H) of rainfall and throughfall were measured over a 3-month period in a Douglas-fir forest in the Cascade Range of Oregon, USA. The range of spatial variability of throughfall isotopic composition exceeded the differences between event-mean isotopic compositions of rainfall and throughfall. Inter-event isotopic variation of precipitation was high and correlated with the isotopic deviation of throughfall from rainfall, likely related to a high canopy/bark storage capacity storage bridging events. Both spatial variability of throughfall isotopic composition and throughfall–precipitation isotopic differences appear to have been controlled by the temporally varying influence of residual precipitation from previous events. Therefore, isotopic heterogeneity could indicate local storage characteristics and the partitioning of flow-paths within the canopy.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Allen, S. T., Brooks, J. R., Keim, R. F., Bond, B. J. and McDonnell, J. J. (2014), The role of pre-event canopy storage in throughfall and stemflow by using isotopic tracers. Ecohydrology, 7: 858–868. doi:10.1002/eco.1408
Journal Title
Journal Volume
  • 7
Journal Issue/Number
  • 2
Keyword
Rights Statement
Funding Statement (additional comments about funding)
  • Data, facilities and financial support were provided by the H. J. Andrews Experimental Forest research program, funded by the National Science Foundation’s Long-Term Ecological Research Program (DEB 08-23380), US Forest Service Pacific Northwest Research Station, and Oregon State University.
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2014-05-27T17:07:17Z (GMT) No. of bitstreams: 1 BondBarbaraForestryRolePre-EventCanopy.pdf: 808349 bytes, checksum: 5ce29ba73079e8cb136e1bf803ed9b7e (MD5)
  • description.provenance : Made available in DSpace on 2014-05-27T17:07:17Z (GMT). No. of bitstreams: 1 BondBarbaraForestryRolePre-EventCanopy.pdf: 808349 bytes, checksum: 5ce29ba73079e8cb136e1bf803ed9b7e (MD5) Previous issue date: 2014-04
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-05-27T17:07:07Z No. of bitstreams: 1 BondBarbaraForestryRolePre-EventCanopy.pdf: 808349 bytes, checksum: 5ce29ba73079e8cb136e1bf803ed9b7e (MD5)

Relationships

Parents:

This work has no parents.

Items