1. Spearman Correlation between the NDVI and Quercus Airborne Pollen in the SW of the Iberian Peninsula
- Author
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Rocío González-Naharro, Elia Quirós, Santiago Fernández-Rodríguez, Inmaculada Silva-Palacios, Rafael Tormo-Molina, José María Maya-Manzano, Alejandro Monroy-Colin, Raúl Pecero-Casimiro, and Ángela Gonzalo-Garijo
- Subjects
Normalized Difference Vegetation Index (NDVI) ,Quercus airborne pollen ,Polygon oak trees ,Spearman correlation ,Pollination phenology ,General Works - Abstract
New space technologies as Advanced Very High Resolution Radiometer (AVHRR) and the MODerate resolution Imaging Spectroradiometer (MODIS) have been used to display several phenological cycles of ecosystems around the world. The aim of this study was to establish the relationship between Normalized Difference Vegetation Index, NDVI, associated to oak trees within three training data polygons (15, 25 and 50 km-distance to the volumetric sampler Hirst), and the daily average Quercus airborne pollen concentrations in 20 years. The study was developed in Badajoz (SW Iberian Peninsula) with a continuous pollen recording in the period from 1994 to 2013. The main novelty of this study has been the analysis of the correlation between the two-time series, using Spearman test. Within the 20 studied years, 12 years obtained significant values in the Spearman test in the whole studied area.
- Published
- 2018
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