Trends in Spring Phenology of Western European Deciduous Forests
作者： Eliakim Hamunyela , Jan Verbesselt , Gerbert Roerink , Martin Herold
DOI: 10.3390/RS5126159
关键词:
摘要: Plant phenology is changing because of recent global warming, and this change may precipitate changes in animal distribution (e.g., pests), alter the synchronization between species, have feedback effects on climate system through alteration biogeochemical physical processes vegetated land surface. Here, ground observations (leaf unfolding/first leaf separation six deciduous tree species) satellite-derived start-of-growing season (SOS) are used to assess how timing leafing/SOS Western European forest responded variability 2001 2011 evaluate reliability satellite SOS estimates tracking response leafing area. Satellite derived from Normalized Difference Vegetation Index (NDVI) time series Moderate Resolution Imaging Spectroradiometer (MODIS). Temporal trends quantified using linear regression, expressing as a function time. We demonstrated that growing was starting earlier for majority temperate forests Europe, possibly influenced by regional spring warming experienced during same period. A significant shift up 3 weeks early found both estimates. also show magnitude trajectory shifts well comparable situ observations, hence highlighting importance imagery monitoring under climate.
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