Phenology of the beech forests in the Western Carpathians from MODIS for 2000-2015

The present paper introduces a satellite-based approach to the detection of phenology events in beech forests across Slovakia (the Western Carpathians) using the MOD/MYD09 products. Normalized vegetation index (NDVI) was used for determining the onset of the phenophases in spring and autumn. Double...

Full description

Saved in:
Bibliographic Details
Published in:IForest (Viterbo) 2017-06, Vol.10 (3), p.537-546
Main Authors: Bucha, T, Koren, M
Format: Article
Language:English
Subjects:
Automation
Beech
Extreme values
Forest Phenology
Forests
Growing Season
Leaf fall
Leaves
MODIS
NDVI
Phenology
Quality control
Satellites
Statistical analysis
Time series
Vegetation
Vegetation index
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The present paper introduces a satellite-based approach to the detection of phenology events in beech forests across Slovakia (the Western Carpathians) using the MOD/MYD09 products. Normalized vegetation index (NDVI) was used for determining the onset of the phenophases in spring and autumn. Double logistic sigmoid function was applied in order to fit the NDVI profile during the year. The satellite-derived phenological metrics was based on calculating the extreme values of the sigmoid function and its derivatives. Between 2000 and 2015, a time-series analysis using the linear regressions models revealed that the onset of leaf unfolding shifted at a rate of 0.8 day per decade, the onset of leaf fall was delayed at a rate of 1.9 day per decade, and the growing season (GS) extended at a rate of 1.1 day per decade. However, at a regional level, the trends were not found to be statistically significant in either case. Leaf unfolding/fall was significantly non-linearly delayed/advanced with the increase of altitude (p
ISSN:1971-7458
1971-7458
DOI:10.3832/ifor2062-010