Temperature sensitivity as an explanation of the latitudinal pattern of green-up date trend in Northern Hemisphere vegetation during 1982-2008
作者： Miaogen Shen , Nan Cong , Ruyin Cao
DOI: 10.1002/JOC.4227
关键词: Temperate climate 、 Latitude 、 Vegetation 、 Northern Hemisphere 、 Common spatial pattern 、 Phenology 、 Ecosystem 、 Geography 、 Climate change 、 Climatology
摘要: The vegetation green-up date (GUD) is widely expected to advance an earlier in the year response increasing spring temperature. However, although it well known that climatic warming has been more intensive at higher latitudes than lower Northern Hemisphere, not whether this greater led a of GUD during past few decades. We have first determined from satellite-derived greenness index for all vegetated land between 30 and 75°N 1982 2008, then investigated latitudinal pattern inter-annual trend its relation pre-season results show generally latitudes, spite faster increase temperature latitudes. find 88% variability can be explained by sensitivity change also resulted northward shift isolines 1°–4° 50 65°N period. These findings highlight shaping spatial phenological suggest temperate ecosystems may experience if current continues.
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