Creation and environmental applications of 15-year daily inundation and vegetation maps for Siberia by integrating satellite and meteorological datasets

Progress in Earth and Planetary Science

Table 9 Phenological parameters estimated by double sigmoid fitting of NDVI over Elgeeii

YR	D₁ (SOS)	D₂ (EOS)	D₃ (SOF)	D₄ (EOF)	D₅ (peak)	SGS (Nagai et al. 2020)	EGS (Nagai et al. 2020)
2003	134	169	238	265	206	–	–
2004	151	170	243	256	212	–	–
2005	143	159	247	255	214	–	–
2006	139	154	235	256	188	–	–
2007	128	157	244	264	206	–	–
2008	144	150	248	257	191	–	–
2009	144	150	249	257	194	–	–
2010	134	150	245	255	208	134	276
2011	128	145	243	255	203	132	270
2012	134	151	234	263	184	131	282
2013	124	162	242	262	211	129	275
2014	123	158	248	262	219	130	273
2015	148	158	246	260	195	137	278
2016	145	154	239	257	185	138	273
2017	137	162	248	263	215	135	276
Slope (anomaly/year)	− 0.67	− 0.33	0.24	0.10	0.00	–	–
p-value	0.52	0.62	0.55	0.58	1.00	–	–

D₁: start of spring (SOS), D₂: end of spring (EOS), D₃: start of fall (SOF), D₄: end of fall (EOF), and D₅: peak of NDVI. Start of growing season (SGS) and end of growing season (EGS) determined by a degree-day model were read from Nagai et al. (2020), for comparison with our phenological parameters. Slope and p-value of the SGS and EGS were not calculated since the available duration of the data differed from our phenological parameters
NDVI: normalized difference vegetation index