Table 2. Global biome trends in fire weather season length and long fire weather season affected area.

Biome	Mean fire weather season length trend (days per year)	Long fire weather season affected area trend (% glob. veg. area per year)
Tropical forests	0.089**	NS
Temperate broadleaf and mixed forests	0.103***	0.0464***
Temperate conifer forests	0.184***	0.0150***
Tropical and subtropical grasslands, savannas and shrublands	0.220***	0.06278**
Temperate and montane grasslands, savannas and shrublands	NS	0.0255**
Boreal forests/taiga and tundra	NS	NS
Mediterranean forests, woodlands and scrub	0.159**	0.0105***
Xeric shrublands	0.151***	0.0535***

NS, not significant.

Results of non-parametric tests examining temporal trends in the biome mean fire weather season length and long fire weather season affected area. (***P<0.01, **P<0.05, *P<0.1). Slopes were estimated using the Theil–Sen non-parametric trend slope estimator and significance tests were performed using the Mann–Kendall trend test following a four-step approach to reduce the effects of serial autocorrelation on significance tests66.