Spatial patterns of climate change and associated climate hazards in Northwest China.

For the wetting trend, a decreasing trend followed by an increasing trend was observed since the 1960s, with a cut-off of 1997 59 .

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The arid or semi-arid northwestern NWC (mean annual P below 500 mm) is with an increasing trend in precipitation at a rate around 23.7 mm/10a.

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