Table 1.
Geographic coordinates and climate conditions of the four regions of Madeira Island where the onions were cultivated.
| Location | Latitude a | Longitude a | Altitude (m) a | Mean Temperature (°C) b | Mean Rainfall (mm) b | Köppen-Geiger Climate Classification b |
|---|---|---|---|---|---|---|
| Porto Moniz | 32°52′0.06″ N | 17°10′14.19″ W | 40 | 18.9 | 559 | Csa |
| Ribeira Brava | 32°40′26.36″ N | 17°3′3.57″ W | 360 | 17.6 | 614 | Csb |
| Caniço | 32°39′6.14″ N | 16°50′7.93″ W | 163 | 17.6 | 614 | Csb |
| Santa Cruz | 32°41′21.41″ N | 16°47′26.66″ W | 31 | 18.8 | 592 | Csa |
Csa: hot-summer Mediterranean climate. Csb: warm-summer Mediterranean climate; a Information obtained from www.google.com/maps; b Information obtained from https://es.climate-data.org/.