PhenoApp. Una aplicación basada en Google Earth Engine para el monitoreo de la fenología:

Diego García-Díaz; Ricardo  Díaz-Delgado

doi:10.4995/raet.2023.18767

Authors

Diego García-Díaz Estación Biológica de Doñana (CSIC)
Ricardo Díaz-Delgado Estación Biológica de Doñana (CSIC)

DOI:

https://doi.org/10.4995/raet.2023.18767

Keywords:

Phenology, Phenocams, Google Earth Engine, Geemap, Python

Abstract

PhenoApp application have been developed within the framework of the eLTER Plus and SUMHAL projects, as a tool aimed at scientists and managers of the sites integrated in the eLTER network, for which long-term phenology monitoring can be assessed. The application provides a dynamic map that allows the selection of any site in the network and queries the phenological metrics of each pixel or group of pixels generated with the Sentinel-2 time series of images using the Ndvi2Gif and PhenoPY python libraries. The application also integrates phenology products from MODIS (MCD12Q2.006) and Copernicus Sentinel 2 High Resolution Vegetation Phenology Product (HR VPP). In addition, the application incorporates a web form that allows the user to provide the phenology data obtained in situ (through direct observation or phenocams), which will be used to perform a validation of the different products obtained via satellite. As an example, we carried out a preliminary validation in one of the sites of the eLTER network located in the Doñana Natural Area (END). We used in situ data provided by the network of phenocams in the Doñana Biological Reserve since 2016 installed by the Singular Scientific and Technical Infrastructure of Doñana (ICTS-Doñana). A preliminary validation analysis highlights the need to consider the discrepancies between the different products and methods according to the phenological variability inherent in each ecosystem.

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Author Biographies

Diego García-Díaz, Estación Biológica de Doñana (CSIC)

Laboratorio de Sistemas de Información Geográfica y Teledetección

Ricardo Díaz-Delgado, Estación Biológica de Doñana (CSIC)

Laboratorio de Sistemas de Información Geográfica y Teledetección

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