Articles | Volume 23
https://doi.org/10.5194/asr-23-33-2026
https://doi.org/10.5194/asr-23-33-2026
08 Oct 2026
 | 08 Oct 2026

Frost days in the beginning of the growing season for Norway

Helga Therese Tilley Tajet, Reidun Gangstø, Andreas Dobler, Inger Hanssen-Bauer, and Hans Olav Hygen

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Cited articles

Augspurger, C. K.: Reconstructing patterns of temperature, phenology, and frost damage over 124 years: Spring damage risk is increasing, Ecology, 94, 41–50, https://doi.org/10.1890/12-0200.1, 2013. 
Buaas, T. O., Simonsen, S. W., and Lindgren, H. M.: Jostein fortviler: – Ikke et eneste eple på 13.000 epletrær (“Jostein despairs: – Not a single apple in 13,000 apple trees”), NRK, https://www.nrk.no/vestfoldogtelemark/far-eplesesongen-odelagt-av-frost-1.14542678, (last access: 10 March 2026), 2019. 
Carter, T. R.: Changes in the thermal growing season in Nordic countries during the past century and prospects for the future, AFSci., 7, 161–179, https://doi.org/10.23986/afsci.72857, 1998. 
Cornes, R. C., van der Schrier, G., and Squintu, A. A.: A reappraisal of the thermal growing season length across Europe, Int. J. Climatol.,39, 1787–1795, https://doi.org/10.1002/joc.5913, 2019. 
Dalen, R.: Nattefrost kan gi eplekrise (“Night frost may cause apple crisis”), NRK, https://www.nrk.no/buskerud/nattefrost-kan-gi-eplekrise-1.11696127, (last access: 10 March 2026), 2014. 
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Short summary
Frost early in the growing season affects many crops and plant species. In Norway, warm early springs can trigger early flowering, followed by cold spells causing frost damage. Although warming extends the growing season, frost risk may increase at its start or end. At present, the early-season risk is highest in lowland South Norway, especially the southeast, and has increased most along the west coast. Future projections indicate an increasing risk along the coast, but decreasing risk inland.
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