Fields of study > Air temperature
Tropical nights (TR20)
Tropical nights (TR20): annual count of days when daily minimum temperature is greater than 20 °C (TN > 20 ºC). The unit of measurement is “days”.
The evolution of TR20 anomaly (ATR20, difference between the annual value of TR20 and the mean value of TR20 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 TR20 index is shown.
The annual mean of TR20 for the Pyrenees is obtained from the annual TR20 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 TR20 for the 4 zones of the Massif is obtained from the annual TR20 values of the representative series located in each zone.
Tropical nights (TR20)
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Evolution of the annual TR20 anomaly (ATR20, in days) in the Pyrenees for the period 1959-2020. Red points (positive ATR20) indicate a TR20 value higher than the reference period value and blue points (negative ATR20) indicate a TR20 value lower than the reference period value.
The dotted line shows the linear trend of the series (+0,8 days/decade).
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CSV TR20 anomaly - Pyrenees (1959-2020) Graph TR20 anomaly - Pyrenees (1959-2020)Evolution of the annual TR20 anomaly (ATR20, in days) in the Northern Pyrenees for the period 1959-2020. Red points (positive ATR20) indicate a TR20 value higher than the reference period value and blue points (negative ATR20) indicate a TR20 value lower than the reference period value.
The dotted line shows the linear trend of the series (+1,0 days/decade).
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CSV TR20 anomaly - Northern Pyrenees (1959-2020) Graph TR20 anomaly - Northern Pyrenees (1959-2020)Evolution of the annual TR20 anomaly (ATR20, in days) in the Southern Pyrenees for the period 1959-2020. Red points (positive ATR20) indicate a TR20 value higher than the reference period value and blue points (negative ATR20) indicate a TR20 value lower than the reference period value.
The dotted line shows the linear trend of the series (+0,6 days/decade).
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CSV TR20 anomaly - Southern Pyrenees (1959-2020) Graph TR20 anomaly - Southern Pyrenees (1959-2020)Evolution of the annual TR20 anomaly (ATR20, in days) in the Mediterranean Pyrenees for the period 1959-2020. Red points (positive ATR20) indicate a TR20 value higher than the reference period value and blue points (negative ATR20) indicate a TR20 value lower than the reference period value.
The dotted line shows the linear trend of the series (+1,2 days/decade).
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CSV TR20 anomaly - Mediterranean Pyrenees (1959-2020) Graph TR20 anomaly - Mediterranean Pyrenees (1959-2020)Evolution of the annual TR20 anomaly (ATR20, in days) in the Atlantic Pyrenees for the period 1959-2020. Red points (positive ATR20) indicate a TR20 value higher than the reference period value and blue points (negative ATR20) indicate a TR20 value lower than the reference period value.
The dotted line shows the linear trend of the series (+0,4 days/decade).
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CSV TR20 anomaly - Atlantic Pyrenees (1959-2020) Graph TR20 anomaly - Atlantic Pyrenees (1959-2020)Evolution of the annual TR20 value (in days) in HONDARRIBIA-MALKARROA (Euskadi) for the period 1959-2020.
The dotted line shows the linear trend of the series (+1,3 days/decade).
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CSV TR20 - HONDARRIBIA (EUS) (1959-2020) Graph TR20 - HONDARRIBIA (EUS) (1959-2020)Evolution of the annual TR20 value (in days) in ANDORRA LA VELLA (Andorra) for the period 1959-2020.
The dotted line shows the linear trend of the series, which is practically null (0,0 days/decade).
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CSV TR20 - ANDORRA LA VELLA (AND) (1959-2020) Graph TR20 - ANDORRA LA VELLA (AND) (1959-2020)Evolution of the annual TR20 value (in days) in RANSOL (Andorra) for the period 1959-2020.
The dotted line shows the linear trend of the series, which is null (any tropical nigth has not been recorded in the analyzed period).
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CSV TR20 - RANSOL (AND) (1959-2020) Graph TR20 - RANSOL (AND) (1959-2020)Evolution of the annual TR20 value (in days) in ASCOU (Occitanie) for the period 1959-2020.
The dotted line shows the linear trend of the series, which is null (any tropical nigth has not been recorded in the analyzed period).
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CSV TR20 - ASCOU (OCC) (1959-2020) Graph TR20 - ASCOU (OCC) (1959-2020)Evolution of the annual TR20 value (in days) in LORP-SENTARAILLE (Occitanie) for the period 1959-2020.
The dotted line shows the linear trend of the series (+0,1 days/decade).
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CSV TR20 - LORP-SENTARAILLE (OCC) (1959-2020) Graph TR20 - LORP-SENTARAILLE (OCC) (1959-2020)Evolution of the annual TR20 value (in days) in BAGNERES DE LUCHON (Occitanie) for the period 1959-2020.
The dotted line shows the linear trend of the series, which is practically null (0,0 days/decade).
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CSV TR20 - BAGNERES DE LUCHON (OCC) (1959-2020) Graph TR20 - BAGNERES DE LUCHON (OCC) (1959-2020)Evolution of the annual TR20 value (in days) in LARUNS-ARTOUSTE (Nouvelle-Aquitaine) for the period 1959-2020.
The dotted line shows the linear trend of the series, which is practically null (0,0 days/decade).
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CSV TR20 - LARUNS-ARTOUSTE (NAQ) (1959-2020) Graph TR20 - LARUNS-ARTOUSTE (NAQ) (1959-2020)Evolution of the annual TR20 value (in days) in UZEIN-PAU (Nouvelle-Aquitaine) for the period 1959-2020.
The dotted line shows the linear trend of the series (+0,4 days/decade).
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CSV TR20 - UZEIN-PAU (NAQ) (1959-2020) Graph TR20 - UZEIN-PAU (NAQ) (1959-2020)Evolution of the annual TR20 value (in days) in PERPIGNAN (Occitanie) for the period 1959-2020.
The dotted line shows the linear trend of the series (+5,1 days/decade).
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CSV TR20 - PERPIGNAN (OCC) (1959-2020) Graph TR20 - PERPIGNAN (OCC) (1959-2020)Evolution of the annual TR20 value (in days) in FIGUERES (Catalunya) for the period 1959-2020.
The dotted line shows the linear trend of the series (+1,6 days/decade).
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CSV TR20 - FIGUERES (CAT) (1959-2020) Graph TR20 - FIGUERES (CAT) (1959-2020)Evolution of the annual TR20 value (in days) in TREMP (Catalunya) for the period 1959-2020.
The dotted line shows the linear trend of the series (+0,2 days/decade).
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CSV TR20 - TREMP (CAT) (1959-2020) Graph TR20 - TREMP (CAT) (1959-2020)
Bulletin of Climate Change Indicators of the Pyrenees 2020
The Bulletin of Climate Change Indicators of the Pyrenees (BICCPIR) 2020 aims to deepen the knowledge of the anthropic climate change effects in the Pyrenees. Thus, information on the climate evolution is provided through a set of indicators grouped by systems.
