1. Satellite-Based Shift in Vegetation Seasonality Xiaoyang Zhang ERT at NOAA/NESDIS/STAR

2. Tree Canopy Seasonality Controlled by temperature in humid climates and by soil moisture in dry climates Affected by drought or insects

3. Temperature effect on the Shift of Biome Seasonality --Interannual Trend in Greenup Onsets (1982-2005) Early later Zhang et al. 2007

4. Rainfall Effect on the Shift of Biome Seasonality ---Vegetation Greenup Onset and the Onset of Rainy Season (ORS) (2001) Vegetation greenup onset in the first cycle Vegetation greenup onset in the second cycle The start of rainy season in the first cycle The start of rainy season in the second cycle Zhang, Friedl et al. 2005

5. Rainfall Effects on the Shift of Biome Seasonality --Interannual Trend in the Integrated NDVI During Growing season Shift in INDVI Shift in precipitation Rainfall in growing season (82-2005)

6. Effect of Humanity Activity (Agriculture) on Biome Seasonality Yellow for croplands maroon for cropland and natural vegetation mosaic Greenup onset (DOY)Dormancy onset (DOY) The Great Lakes Mississippi Zhang, Friedl et al. 2006

7. Effect of Humanity Activity ( Urban Heat Islands) on Biome Seasonality Difference in greenup onset Difference in dormancy onset Difference in spring temperature Difference in autumn- winter temperature Zhang, Friedl et al. 2004

8. How to Separate Mixed Biome Seasonality ---Spring Phenology in Northern Wisconsin Ahl et al., 2006 MODIS LAI Possible solution: TM+MODIS (or AVHRR) Understory Overstory Overstory+understory MODIS LAI

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 Middle NDVI point Method X Maximum curvature change

11. How to detect Fire effect on the Shift of Biome Seasonality Hayman fire in June 2002 Burn scar from TM

12. How to Detect Biome Seasonality Disturbed by Extreme Events (such as plants damaged by spring freeze, insects, and hurricanes, etc) Gu et al. 2008, The 2007 Eastern US Spring Freeze: Increased Cold Damage in a Warming World? 58(3), BioScience Damaged forests in Hurricane Katrina. Credit: Louisiana State University Hurricane Katrina & Rita Cooperative Clearinghouse Chambers, J.Q. (2007).

13. How to Monitor Biome Seasonality in Real Time 8:00am 12:00pm 16:00pm Daily BRDF-Adjusted reflectance MSG SEVIRI: 9/10/2004, RED= Band01, Green= Band02 Blue= band01 Provided by Qingling Zhang

14. THANK YOU