Satellite-Based Shift in Vegetation Seasonality

1
Satellite-Based Shift in Vegetation Seasonality
Xiaoyang Zhang ERT at NOAA/NESDIS/STAR
2
Tree Canopy Seasonality
3
Temperature effect on the Shift of Biome
Seasonality--Interannual Trend in Greenup Onsets
(1982-2005)
Zhang et al. 2007
4
Rainfall Effect on the Shift of Biome Seasonality
---Vegetation Greenup Onset and the Onset of
Rainy Season (ORS) (2001)
Zhang, Friedl et al. 2005
5
Rainfall Effects on the Shift of Biome
Seasonality --Interannual Trend in the
Integrated NDVI During Growing season
Rainfall in growing season (82-2005)
6
Effect of Humanity Activity (Agriculture) on
Biome Seasonality
maroon for cropland and natural vegetation mosaic
Greenup onset (DOY)
Dormancy onset (DOY)
Yellow for croplands
Zhang, Friedl et al. 2006
7
Effect of Humanity Activity (Urban Heat Islands)
on Biome Seasonality
Zhang, Friedl et al. 2004
8
How to Separate Mixed Biome Seasonality---Spring
Phenology in Northern Wisconsin
MODIS LAI
Ahl et al., 2006
Possible solution TMMODIS (or AVHRR)
9
How to Select Temporal Composite Data for
Detecting Biome Seasonality
Zhang, Friedl et al. 2008
10
How to Standardize Methods for Detecting Biome
Seasonality --Detection Methods and Vegetation
Index
11
How to detect Fire effect on the Shift of Biome
Seasonality
Burn scar from TM
Hayman fire in June 2002
12
How to Detect Biome Seasonality Disturbed by
Extreme Events (such as plants damaged by spring
freeze, insects, and hurricanes, etc)
Damaged forests in Hurricane Katrina. Credit
Louisiana State University Hurricane Katrina
Rita Cooperative Clearinghouse Chambers, J.Q.
(2007).
Gu et al. 2008, The 2007 Eastern US Spring
Freeze Increased Cold Damage in a Warming World?
58(3), BioScience
13
How to Monitor Biome Seasonality in Real Time
MSG SEVIRI 9/10/2004, RED Band01, Green
Band02 Blue band01
Provided by Qingling Zhang
14
THANK YOU