Dont let me down

1. Phenology Images (5-Year Long
Term Average)
VIP Lab
September 21, 2011

2. Introduction
• The following global images were taken from
AVHRR (1980 to 2000) and MODIS (2000 to
2010) phenology metrics.
• Phenology metrics
– Start of the season (SOS)
– Length of the season (LOS)
– End of the season (EOS)

3. Objective
To determine areas where phenology metrics
derived from NDVI and EVI2 differ from each
other.

4. Phenology, 1980_1985
NDVI EVI2

5. Phenology, 1985_1990
NDVI EVI2

6. NDVI EVI2
Phenology, 1990_1995

7. NDVI EVI2
Phenology, 1995_2000

8. Phenology, 2000_2005
NDVI EVI2

9. Phenology, 2005_2010
NDVI EVI2

10. Conclusions
Area 1980-1985 1985_1990 1990_1995 1995_2000 2000_2005 2005_2010
S
O
S
L
O
S
E
O
S
S
O
S
L
O
S
E
O
S
S
O
S
L
O
S
E
O
S
S
O
S
L
O
S
E
O
S
S
O
S
L
O
S
E
O
S
S
O
S
L
O
S
E
O
S
Desert
(AUS)
= = = = > > = = = = = = = = = = > >
Snow
(Asia)
= > > = > > = > > = > > = = = = = =
Dense
Vegetation
(Amazon)
= = = = = = = = < = = < > < < > < =
Deciduous
(US East
Coast)
> > > = = = > > > < > > = = = = > >
This table shows whether NDVI differs or not from EVI2 (i.e. NDVI (<, > or =) EVI2)