Phenological metrics for Protected Area "NorthernLimestone", MODIS terra tile h18v04

Phenological metrics derived from satellite data by use of R-package "phenex" (Lange (2017)). NDVI is filtered by modified BISE algorithm (see Viovy (1992)). NDVI curve is modelled with method DLogistic (see Doktor (2017), Lange (2017)). Phenological metrics include:

(1) Start of season / green-up (GU);
(2) End of season / senescence (SEN);
(3) Length of vegetation period (VP);
(4) GPP proxy (integral over vegetation period, GSIVI);
(5) minimum NDVI (MinNDVI);
(6) maximum NDVI (MaxNDVI);
(7) day of minimum NDVI as julian date (MinDOY);
(8) day of maximum NDVI as julian date (MaxDOY);
(9) r-square of modelled NDVI curve;

(1)-(4) are derived by using local threshold (LT) and global threshold (GT) method (see Doktor (2017), Lange (2017)).

(1)-(6) include mean and standard deviation;

References: [Viovy 1992]: Viovy N, Arino O, Belward A (1992) The Best Index Slope Extraction (BISE): A method for reducing noise in NDVI time-series. International Journal of Remote Sensing 13(8):1585–1590;

[Doktor 2017]: Doktor D, Lange M (2017) Disparate applicability and broad spatio-temporal satellite resolution affects extracted trends of European spring phenology for 1989-2007. In preparation for Global Ecology and Biogeographie;

[Lange 2017]: Lange M, Doktor D (2017) phenex: Auxiliary Functions for Phenological Data Analysis. R package version 1.4-5, https://CRAN.R-project.org/package=phenex, Last accessed on 2017-05-29;