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Breakout Session IV - Impacts and Consequences of Global Change

Breakout Session IV - Impacts and Consequences of Global Change. Breakout Topic on Shift in Biome Seasonality Alfredo Huete and Alex Chekalyuk. the role of climate change and human impacts on seasonal biome shifts (length of growing seasons; disrupted seasonal cycles).

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Breakout Session IV - Impacts and Consequences of Global Change

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  1. Breakout Session IV - Impacts and Consequences of Global Change Breakout Topic on Shift in Biome Seasonality Alfredo Huete and Alex Chekalyuk the role of climate change and human impacts on seasonal biome shifts (length of growing seasons; disrupted seasonal cycles)

  2. Marine Biogeographic Provinces Oliver et al.

  3. Jan 2006 Gyre area Jan 1998 To Dec 2006 Irwin et al.

  4. Combined Global Gyres Total C fixation (g / d) Trend Combined Tropical Seas Jan 1998 Dec 2006 Irwin et al.

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

  6. Human impacts of land surface phenology: Example- following the collapse of the Soviet Union are not uniform across Kazakhstan (de Beurs and Henebry 2004, 2005).

  7. Needs • Need for in-situ observations, particularly those providing seasonal information (towers, web cams, ‘citizen science’, moving platforms, fisheries data, new sensors & technologies) • Satellite vs. surface intercomparisons with respect to seasonality • Need for long-term inter-comparability of multiple sensor time series datasets. • Integration of fine and moderate resolution sensors (scaling) • Integration of passive, active, geostationary satellite data

  8. Challenging questions • What are the nominal variations in biome seasonality • What are the controls in biome seasonality? (climate, human activities, nutrients) • Can we identify land - ocean seasonal interactions (lags)? • What are the mechanisms and drivers of change/ shifts in seasonality observed from satellites? (stress agents, multiple stressors) • What are the resiliences of biomes to change? • What are thresholds to abrupt changes in seasonality? (extreme events) • What are the potential impacts of biome seasonal shifts on biodiversity, carbon/water cycling, climate, etc..

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