A farmer-based analysis of climate change adaptation options of agriculture in the Bărăgan Plain, Romania

Earth Perspectives

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Table 3 Climate extreme indices calculated for the Bărăgan Plain

Index	Short name	Definition	Unit	Time scale	Relevance	Reference
Length of growing season	GSL	Number of days with Tmean ≥ 5 °C for 5 consecutive days	days	Annual, seasonal	Length of vegetation season	ETCCDI
Early spring coefficient	ES	Sum of mean temperatures ≥0 °C in February-March interval	Units	Monthly interval	Start of the vegetation season	Sandu et al. (2010); MADR (2014)
Frost days	Tmin0	Number of days with Tmin ≤ 0 in November-March interval	Units	November-March	Cold stress (relevant especially for winter wheat)	Sandu et al. (2010); MADR (2014)
Frost units	FU	Sum of mean temperatures < 0 °C over November-March interval	Units	November-March	Cold stress	Sandu et al. (2010); MADR (2014)
Extremely hot units	Tmax32	Maximum number of 3 or 5 consecutive days with Tmax ≥32	Units	Annual, seasonal	Heat stress	Sandu et al. (2010); MADR (2014)
Tropical days	Tmax30	Number of days with Tmax ≥30	Days	Annual, seasonal	Critical (lethal) thresholds for crops	ETCCDI