Subsurface imaging of vegetation, climate, and root-zone moisture interactions

Jayawickreme, Dushmantha H., Van Dam, Remke L., & Hyndman, David W. (2008) Subsurface imaging of vegetation, climate, and root-zone moisture interactions. Geophysical Research Letters, 35(18).

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Abstract

Changes in global climate and land use affect important prolesses from evapotranspiration and groundwater recharge to carbon storage and biochemical cycling. Near surface soil moisture is pivotal to understand the consequences of these changes. However, the dynamic interactions between vegetation and soil moisture remain largely unresolved because it is difficult to monitor and quantify subsurface hydrologic fluxes at relevant scales. Here we use electrical resistivity to monitor the influence of climate and vegetation on root-zone moisture, bridging the gap between remotely-sensed and in-situ point measurements. Our research quantifies large seasonal differences in root-zone moisture dynamics for a forest-grassland ecotone. We found large differences in effective rooting depth and moisture distributions for the two vegetation types. Our results highlight the likely impacts of land transformations on groun ter recharge, streamflow, and land-atmosphere exchanges.

Impact and interest:

31 citations in Scopus
26 citations in Web of Science®
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ID Code: 80133
Item Type: Journal Article
Refereed: Yes
DOI: 10.1029/2008GL034690
ISSN: 0094-8276
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: American Geophysical Union.
Deposited On: 15 Jan 2015 03:08
Last Modified: 23 Jun 2017 17:02

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