Water-dominated vegetation activity across biomes in mid-latitudinal eastern China

Details Water-dominated vegetation activity across biomes in mid-latitudinal eastern China Water-dominated vegetation activity across biomes in mid-latitudinal eastern China

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3604402w&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 4, CiteID L04402

Physics

Biogeosciences: Ecosystems, Structure And Dynamics (4815), Biogeosciences: Plant Ecology (1851), Global Change: Climate Dynamics (0429, 3309), Global Change: Remote Sensing (1855), Hydrology: Drought

Scientific paper

Sensitivity of vegetation activity to water and temperature in eastern China was investigated using growing-season Normalized Difference Vegetation Index (NDVI) and climate factors (MAP, mean annual precipitation; RH, relative humidity; PDSI, Palmer Drought Severity Index; and MAT, mean annual temperature). At a regional level, the cut-off of mean NDVI value receiving a MAP interval of 543 +/- 69 mm is identified, indicating the saturating effect of natural vegetation cover or greenness in the open-canopy summer-green deciduous forest of eastern China along the north-south rainfall gradient. The rainfall-use efficiency (RUE) of vegetation as well as correlation coefficients of NDVI against MAP, RH and PDSI decreases with increased precipitation in a consistent logarithmic pattern. In most cases, temperature does not have a significant effect on the vegetation activity. The results of this study highlight a clear pattern of water-dominated vegetation activity; however, a potential temperature-induced drought stress in temperate steppe and subtropical evergreen broadleaf forest of eastern China is also indicated.

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