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Global L-Band Vegetation Volume Fraction Estimates for Modeling Vegetation Optical Depth

Chaparro, David and Jagdhuber, Thomas and Piles, Maria and Entekahbi, Dara and Jonard, Francois and Fluhrer, Anke and Feldman, Andrew and Vall-llossera, Mercè (2021) Global L-Band Vegetation Volume Fraction Estimates for Modeling Vegetation Optical Depth. In: International Geoscience and Remote Sensing Symposium (IGARSS). International Geoscience and Remote Sensing Symposium (IGARSS), 2021-07-12 - 2021-07-16, Brüssel, Belgien. doi: 10.1109/IGARSS47720.2021.9554872.

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The attenuation of microwave emissions through the canopy is quantified by the vegetation optical depth (VOD), which is related to the amount of water, the biomass and the structure of vegetation. To provide microwave-derived plant water estimates, one must account for biomass/structure contributions in order to extract the water component from the VOD. This study uses Aquarius scatterometer data to build an L-band global seasonality of vegetation volume fraction (δ), representative of biomass/structure dynamics. The dynamic range of δ is adapted for its application in a gravimetric moisture (Mg) retrieval model. Results show that δ ranging from 0 to 5·10-4 is needed for modelling physically reasonable Mg values. The global average of δ shows consistent spatial patterns across vegetation distributions, and δ seasonality is coherent with the phenology of the studied vegetation types. These findings enable the separation of information on vegetation water and biomass/structure inherent in the VOD.

Item URL in elib:https://elib.dlr.de/141475/
Document Type:Conference or Workshop Item (Speech)
Title:Global L-Band Vegetation Volume Fraction Estimates for Modeling Vegetation Optical Depth
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Chaparro, DavidUniversitat Politècnica de CatalunyaUNSPECIFIEDUNSPECIFIED
Jagdhuber, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-1760-2425UNSPECIFIED
Piles, MariaUniversity of ValenciaUNSPECIFIEDUNSPECIFIED
Fluhrer, AnkeUNSPECIFIEDhttps://orcid.org/0000-0002-1188-5313UNSPECIFIED
Vall-llossera, MercèUniversitat Politècnica de CatalunyaUNSPECIFIEDUNSPECIFIED
Date:12 October 2021
Journal or Publication Title:International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Vegetation structure, vegetation gravimetric moisture content, biomass, Aquarius scatterometer
Event Title:International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Brüssel, Belgien
Event Type:international Conference
Event Dates:2021-07-12 - 2021-07-16
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Remote Sensing and Geo Research
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Reconnaissance and Security
Deposited By: Fluhrer, Anke
Deposited On:23 Mar 2021 17:15
Last Modified:22 Nov 2021 16:16

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