China's deserts greening and response to climate variability and human activities.

PLoS One · 2021 · PMC8405022 · PMID 34460859

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an increasing trendno p-value reported

Their results showed that the NDVI showed greening trends at the annual scale in several regions, such as the Gurbantunggut Desert, which showed an increasing trend that fluctuated from 1981–2003 [ 17 ].

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a decreasing trendno p-value reported

There were greater fluctuations in seasonal precipitation, especially in summer, with increasing trends in summer (0.4295 mm/yr) and a decreasing trend in winter (-0.0627 mm/yr).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.