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RESEARCH PRODUCT
Retrieval of Forest Water Potential from L-Band Vegetation Optical Depth
Andrew F. FeldmanA.-s. SchmidtThomas JagdhuberFrançois JonardMaria PilesT. MeyerAlexandra G. KoningsMartin BaurN. HoltzmanAnke FluhrerDara EntekhabiDavid Chaparrosubject
L bandRadiometerXylemradiometryVegetationL-bandFootprintharvard forestforestvegetation moistureEnvironmental scienceRadiometryVegetation optical depthground-basedwater potentialWater contentLeaf wetnessRemote sensingdescription
A retrieval methodology for forest water potential from ground-based L-band radiometry is proposed. It contains the estimation of the gravimetric and the relative water content of a forest stand and tests in situ- and model-based functions to transform these estimates into forest water potential. The retrieval is based on vegetation optical depth data from a tower-based experiment of the SMAPVEX 19–21 campaign for the period from April to October 2019 at Harvard Forest, MA, USA. In addition, comparison and validation with in situ measurements on leaf and xylem water potential as well as on leaf wetness and complex permittivity are foreseen to understand limitations and potentials of the proposed approach. As a first result the radiometer-based water potential estimates of the forest stand are concurrent in time and similar in value with their in situ (xylem) counterparts from single trees in the radiometer footprint.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-07-12 | 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS |