6533b7d5fe1ef96bd1263dd4

RESEARCH PRODUCT

L-Band vegetation optical depth for crop phenology monitoring and crop yield assessment

Thomas JagdhuberMaria PilesDara EntekhabiDavid ChaparroMercè Vall-llosseraAlexandra G. KoningsA. Camps

subject

Crop phenologyL bandCrop phenologyYield forecastsTeledetecció010504 meteorology & atmospheric sciencesAgricultural engineering0211 other engineering and technologiesSoil science02 engineering and technology:Enginyeria agroalimentària [Àrees temàtiques de la UPC]01 natural sciencesphenologyCropEnginyeria agronòmicacropWater content021101 geological & geomatics engineering0105 earth and related environmental sciencesBiomass (ecology)business.industryCrop yieldVODVegetationSMAPRemote sensingyieldAgro-ecosystemsL-band:Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció [Àrees temàtiques de la UPC]AgricultureEnvironmental scienceVegetation optical DepthRadiometerbusiness

description

Vegetation Optical Depth (VOD) at L-band is highly sensitive to the water content and above-ground biomass of vegetation. Hence, it has great potential for monitoring crop phenology and for providing crop yield forecasts. Recently, the Multi-Temporal Dual Channel Algorithm (MT -DCA) has been proposed to retrieve L-band VOD from Soil Moisture Active Passive (SMAP) measurements. In previous research, SMAP VOD has been compared to crop phenology and has been used to derive crop yield estimates. Here, we review and expand these initial research studies. In particular, we quantify the capability of VOD to detect different crop stages, and test different VOD metrics (i.e., maximum, range and integrals of VOD) to provide crop yield estimates in the United States Corn Belt. Results show that VOD captures 50% to 70% of crop changes during growing and maturing phases, and that it explains between 44% (in heterogeneous crop regions) and 74% (in homogenous croplands) of final crop yields. Peer Reviewed

yearjournalcountryeditionlanguage
2018-01-01
http://hdl.handle.net/2117/128906