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Frost days (FD0) | Indicadores de Cambio Climático
Air temperature
Fields of study > Air temperature

Frost days (FD0)

Frost days (FD0): annual count of days when daily minimum temperature is less than 0 °C (TN < 0 ºC). The unit of measurement is “days”.

 The evolution of FD0 anomaly (AFD0, difference between the annual value of FD0 and the mean value of FD0 in the reference period 1981-2010) during the period 1959-2020 is shown for the Pyrenees and for 4 areas of the Massif (Northern Pyrenees, Southern Pyrenees, Mediterranean Pyrenees and Atlantic Pyrenees); for each of the 12 series analyzed, the evolution of FD0 index is shown.

The annual mean of  FD0 for the Pyrenees is obtained from the annual FD0 values ​​of 12 representative series of the Pyrenees massif (areas at different altitudes and on all slopes: north, south, east or Mediterranean and west or Atlantic), while the mean value of FD0 for the 4 zones of the Massif is obtained from the annual FD0 values ​​of the representative series located in each zone.

Frost days (FD0)
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Evolution of the annual FD0 anomaly (AFD0, in days) in the Pyrenees for the period 1959-2020. Red points (positive AFD0) indicate a FD0 value higher than the reference period value and blue points (negative AFD0) indicate a FD0 value lower than the reference period value. The dotted line shows the linear trend of the series (-2,6 days/decade).

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CSV FD0 anomaly - Pyrenees (1959-2020) Graph FD0 anomaly - Pyrenees (1959-2020)

Evolution of the annual FD0 anomaly (AFD0, in days) in the Northern Pyrenees for the period 1959-2020. Red points (positive AFD0) indicate a FD0 value higher than the reference period value and blue points (negative AFD0) indicate a FD0 value lower than the reference period value. The dotted line shows the linear trend of the series (-2,7 days/decade).

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CSV FD0 anomaly - Northern Pyrenees (1959-2020) Graph FD0 anomaly - Northern Pyrenees (1959-2020)

Evolution of the annual FD0 anomaly (AFD0, in days) in the Southern Pyrenees for the period 1959-2020. Red points (positive AFD0) indicate a FD0 value higher than the reference period value and blue points (negative AFD0) indicate a FD0 value lower than the reference period value. The dotted line shows the linear trend of the series (-2,5 days/decade).

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CSV FD0 anomaly - Southern Pyrenees (1959-2020) Graph FD0 anomaly - Southern Pyrenees (1959-2020)

Evolution of the annual FD0 anomaly (AFD0, in days) in the Mediterranean Pyrenees for the period 1959-2020. Red points (positive AFD0) indicate a FD0 value higher than the reference period value and blue points (negative AFD0) indicate a FD0 value lower than the reference period value. The dotted line shows the linear trend of the series (-3,0 days/decade).

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CSV FD0 anomaly - Mediterranean Pyrenees (1959-2020) Graph FD0 anomaly - Mediterranean Pyrenees (1959-2020)

Evolution of the annual FD0 anomaly (AFD0, in days) in the Atlantic Pyrenees for the period 1959-2020. Red points (positive AFD0) indicate a FD0 value higher than the reference period value and blue points (negative AFD0) indicate a FD0 value lower than the reference period value. The dotted line shows the linear trend of the series (-2,2 days/decade).

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CSV FD0 anomaly - Atlantic Pyrenees (1959-2020) Graph FD0 anomaly - Atlantic Pyrenees (1959-2020)

Evolution of the annual FD0 value (in days) in SANTESTEBAN (Navarra) for the period 1959-2020. The dotted line shows the linear trend of the series (-1,9 days/decade).

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CSV FD0 - SANTESTEBAN (NAV) (1959-2020) Graph FD0 - SANTESTEBAN (NAV) (1959-2020)

Evolution of the annual FD0 value (in days) in HONDARRIBIA-MALKARROA (Euskadi) for the period 1959-2020. The dotted line shows the linear trend of the series (-0,9 days/decade).

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CSV FD0 - HONDARRIBIA (EUS) (1959-2020) Graph FD0 - HONDARRIBIA (EUS) (1959-2020)

Evolution of the annual FD0 value (in days) in ANDORRA LA VELLA (Andorra) for the period 1959-2020. The dotted line shows the linear trend of the series (-2,3 days/decade).

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CSV FD0 - ANDORRA LA VELLA (AND) (1959-2020) Graph FD0 - ANDORRA LA VELLA (AND) (1959-2020)

Evolution of the annual FD0 value (in days) in RANSOL (Andorra) for the period 1959-2020. The dotted line shows the linear trend of the series (-4,7 days/decade).

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CSV FD0 - RANSOL (AND) (1959-2020) Graph FD0 - RANSOL (AND) (1959-2020)

Evolution of the annual FD0 value (in days) in ASCOU (Occitanie) for the period 1959-2020. The dotted line shows the linear trend of the series (-4,7 days/decade).

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CSV FD0 - ASCOU (OCC) (1959-2020) Graph FD0 - ASCOU (OCC) (1959-2020)

Evolution of the annual FD0 value (in days) in LORP-SENTARAILLE (Occitanie) for the period 1959-2020. The dotted line shows the linear trend of the series (-2,3 days/decade).

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CSV FD0 - LORP-SENTARAILLE (OCC) (1959-2020) Graph FD0 - LORP-SENTARAILLE (OCC) (1959-2020)

Evolution of the annual FD0 value (in days) in BAGNERES DE LUCHON (Occitanie) for the period 1959-2020. The dotted line shows the linear trend of the series (-2,8 days/decade).

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CSV FD0 - BAGNERES DE LUCHON (OCC) (1959-2020) Graph FD0 - BAGNERES DE LUCHON (OCC) (1959-2020)

Evolution of the annual FD0 value (in days) in LARUNS-ARTOUSTE (Nouvelle-Aquitaine) for the period 1959-2020. The dotted line shows the linear trend of the series (-3,7 days/decade).

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CSV FD0 - LARUNS-ARTOUSTE (NAQ) (1959-2020) Graph FD0 - LARUNS-ARTOUSTE (NAQ) (1959-2020)

Evolution of the annual FD0 value (in days) in UZEIN-PAU (Nouvelle-Aquitaine) for the period 1959-2020. The dotted line shows the linear trend of the series (-1,8 days/decade).

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CSV FD0 - UZEIN-PAU (NAQ) (1959-2020) Graph FD0 - UZEIN-PAU (NAQ) (1959-2020)

Evolution of the annual FD0 value (in days) in PERPIGNAN (Occitanie) for the period 1959-2020. The dotted line shows the linear trend of the series (-1,1 days/decade).

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CSV FD0 - PERPIGNAN (OCC) (1959-2020) Graph FD0 - PERPIGNAN (OCC) (1959-2020)

Evolution of the annual FD0 value (in days) in FIGUERES (Catalunya) for the period 1959-2020. The dotted line shows the linear trend of the series (-1,4 days/decade).

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CSV FD0 - FIGUERES (CAT) (1959-2020) Graph FD0 - FIGUERES (CAT) (1959-2020)

Evolution of the annual FD0 value (in days) in TREMP (Catalunya) for the period 1959-2020. The dotted line shows the linear trend of the series (-4,0 days/decade).

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CSV FD0 - TREMP (CAT) (1959-2020) Graph FD0 - TREMP (CAT) (1959-2020)

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