Waves

Waves are due to the cyclical occurrence of phenomena.

Indicator	Metric
Heat Wave	maximum count of consecutive days when Tmax > average Tmax (baseline year) + 3.0 oC (minimum seven days) [Barnett et al., 2006]
Cold Spell	maximum count of consecutive days when Tmin < average Tmin (baseline year) - 3.0 oC (minimum seven days) [Barnett et al., 2006]
Dry Spell	maximum consecutive count of P < Pt [Barnett et al., 2006]
Wet Spell	maximum consecutive count of P > Pt [Barnett et al., 2006]

Tmax (oC): maximum air temperature

Tmin (oC): minimum air temperature

P (mm): precipitation

Pt (mm): minimum threshold precipitation (e.g. 0.2 mm)