Trends in Global Vegetation Activity and Climatic Drivers Indicate a Decoupled Response to Climate Change

摘要: Detailed understanding of a possible decoupling between climatic drivers plant productivity and the response ecosystems vegetation is required. We compared trends in six NDVI metrics (1982–2010) derived from GIMMS3g dataset with modelled biomass assessed uncertainty trend estimates. Annual total weight (TBW) was calculated LINPAC model. Trends were determined using simple linear regression, Thiel-Sen medium slope piecewise regression (PWR) two segments. Values related to Net Primary Production (MODIS-NPP) TBW per biome land-use type. The did not differ much whereas PWR increased fraction explained variation, depending on metric considered. A positive indicating more favorable conditions found for 24% pixels land, 5% negative trend. decoupled trend, monotonic or segmented trends, observed 17–36% all productive areas used. For only 1–2% areas, diverging greening despite strong TBW. choice used strongly affected outcomes regional scales differences variation MODIS-NPP biomes large, combination recommended global studies. have an increasing difference large parts globe. Our findings suggest that future scenarios must consider impacts constraints growth such as extremes weather nutrient availability predict changes NPP CO2 sequestration capacity.