Northern China is an ecologically fragile region, making it highly significant for studying the temporal and spatial variations of vegetation cover and their driving factors.
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Vegetation variations and driving mechanisms in northern China based on kNDVI.
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The trend of kNDVI changes closely follows the northern edge of the transition zone influenced by the summer monsoon, with an increasing trend observed south of this boundary, while most areas north of the boundary remain stable.
When |Z|> Z 1-α/2 , the null hypothesis is rejected, indicating a significant trend in the data.