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Proceedings 2018, 2(20), 1519; https://doi.org/10.3390/proceedings2201519

Spearman Correlation between the NDVI and Quercus Airborne Pollen in the SW of the Iberian Peninsula

1
Department of Graphic Expression, School of Technology, University of Extremadura, Avda. de la Universidad s/n, 10003 Cáceres, Spain
2
Department of Construction, School of Technology, University of Extremadura, Avda. de la Universidad s/n, 10003 Cáceres, Spain
3
Department of Applied Physics, Engineering Agricultural School, University of Extremadura, Avda. Adolfo Suárez s/n, 06006 Badajoz, Spain
4
Department of Plant Biology, Ecology and Earth Sciences, Faculty of Science, University of Extremadura, Avda. Elvas s/n, 06006 Badajoz, Spain
5
School of Chemical and Pharmaceutical Sciences, Dublin Institute of Technology, Kevin Street, Dublin D08X622, Ireland
6
Department of Allergology, Infanta Cristina University Hospital, Avda. Elvas s/n, 06006 Badajoz, Spain
Presented at Environment, Green Technology and Engineering International Conference (EGTEIC 2018), Caceres, Spain, 18–20 June 2018.
*
Author to whom correspondence should be addressed.
Published: 7 November 2018
PDF [203 KB, uploaded 7 November 2018]

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.
Keywords: Normalized Difference Vegetation Index (NDVI); Quercus airborne pollen; Polygon oak trees; Spearman correlation; Pollination phenology Normalized Difference Vegetation Index (NDVI); Quercus airborne pollen; Polygon oak trees; Spearman correlation; Pollination phenology
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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González-Naharro, R.; Quirós, E.; Fernández-Rodríguez, S.; Silva-Palacios, I.; Tormo-Molina, R.; Maya-Manzano, J.M.; Monroy-Colin, A.; Pecero-Casimiro, R.; Gonzalo-Garijo, Á. Spearman Correlation between the NDVI and Quercus Airborne Pollen in the SW of the Iberian Peninsula. Proceedings 2018, 2, 1519.

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