Associated with the positive trend of NDVI, SIF also exhibits a positive trend (6.1 × 10 −3 ± 2.1 × 10 −3 W/m 2 /sr/μm/year), although the data record is relatively short.
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Human-induced biospheric carbon sink: Impact from the Taklamakan Afforestation Project.
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The sentences
Deseasonalized NEE shows a negative trend of −5.2 × 10 −12 ± 5.2 × 10 −12 kg/m 2 /s/y, suggesting that the biosphere is gradually absorbing more CO 2 from the atmosphere.
Despite the absence of a significant trend in precipitation, a significant positive trend is evident in MODIS NDVI, with a rate of 6.8 × 10 −4 ± 1.5 × 10 −4 per year, indicating an increase in vegetation cover in the past 25 y.