The impact of precipitation regimes on forest fires in Yunnan Province, southwest China.

Precipitation showed an increasing trend for the whole Yunnan except for ecoregion IV from 1982 to 2008, with a significant increase in precipitation in ecoregions I ( p < 0.005, R 2 = 0.25) and II ( p < 0.005, R 2 = 0.16), a weak increase in ecoregions III ( p = 0.12, R 2 = 0.08) and V ( p = 0.11, R 2 = 0.08), and a slight decrease in ecoregion IV ( p = 0.36, R 2 = 0.01) ( Figure 4 ).

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The area burned also followed a decreasing trend all over Yunnan during the period 1982–2008 ( Figure 2 ).

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