The Annual Cycle of Frost Hardiness

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Abstract

The hypothetico-deductive modelling framework introduced in Chap. 2 is applied to modelling the annual cycle of frost hardiness in boreal and temperate trees. The concept of frost hardiness is straightforward as such, denoting the threshold temperature that distinguishes between the damaging low-temperature range and the undamaging one. In practice, however, the concept of frost hardiness needs to be specified in regard to the tree tissue addressed and the methods used in assessing it. Similarly to the models of the annual cycle of photosynthetic capacity discussed in Chap. 4, the models of the annual cycle of frost hardiness can be tested continuously on a daily basis. The main environmental factors regulating the annual cycle of frost hardiness are air temperature and night length. These environmental factors regulate the annual cycle of frost hardiness directly and also indirectly by affecting the annual phenological cycle, which in turn changes the direct response. This complexity calls for development of integrated models that address both the fixed-sequence aspects of the phenological cycle and the fluctuating aspects of frost hardiness as such. Integrated models have been developed since the 1970s, and two of them are discussed in detail here. Both models are quite accurate, but there is still room for considerable improvement in their realism. Novel simulations using long-term air temperature records as input for an integrated model revealed large year-to-year variation in the annual cycle of frost hardiness.
Original languageEnglish
Title of host publicationBOREAL AND TEMPERATE TREES IN A CHANGING CLIMATE : MODELLING THE ECOPHYSIOLOGY OF SEASONALITY
EditorsHeikki Hänninen
PublisherSpringer
Publication date2016
Pages173-216
ISBN (Print)978-94-017-7547-2
ISBN (Electronic)978-94-017-7549-6
DOIs
Publication statusPublished - 2016
MoE publication typeA3 Book chapter

Publication series

NameBiometeorology Series
ISSN (Print)1877-5284

Fields of Science

  • 1172 Environmental sciences
  • 119 Other natural sciences

Cite this

Hänninen, H. J. P. (2016). The Annual Cycle of Frost Hardiness. In H. Hänninen (Ed.), BOREAL AND TEMPERATE TREES IN A CHANGING CLIMATE: MODELLING THE ECOPHYSIOLOGY OF SEASONALITY (pp. 173-216). (Biometeorology Series). Springer. https://doi.org/10.1007/978-94-017-7549-6_5
Hänninen, Heikki Juho Pellervo. / The Annual Cycle of Frost Hardiness. BOREAL AND TEMPERATE TREES IN A CHANGING CLIMATE: MODELLING THE ECOPHYSIOLOGY OF SEASONALITY. editor / Heikki Hänninen. Springer, 2016. pp. 173-216 (Biometeorology Series).
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Hänninen, HJP 2016, The Annual Cycle of Frost Hardiness. in H Hänninen (ed.), BOREAL AND TEMPERATE TREES IN A CHANGING CLIMATE: MODELLING THE ECOPHYSIOLOGY OF SEASONALITY. Biometeorology Series, Springer, pp. 173-216. https://doi.org/10.1007/978-94-017-7549-6_5

The Annual Cycle of Frost Hardiness. / Hänninen, Heikki Juho Pellervo.

BOREAL AND TEMPERATE TREES IN A CHANGING CLIMATE: MODELLING THE ECOPHYSIOLOGY OF SEASONALITY. ed. / Heikki Hänninen. Springer, 2016. p. 173-216 (Biometeorology Series).

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

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AB - The hypothetico-deductive modelling framework introduced in Chap. 2 is applied to modelling the annual cycle of frost hardiness in boreal and temperate trees. The concept of frost hardiness is straightforward as such, denoting the threshold temperature that distinguishes between the damaging low-temperature range and the undamaging one. In practice, however, the concept of frost hardiness needs to be specified in regard to the tree tissue addressed and the methods used in assessing it. Similarly to the models of the annual cycle of photosynthetic capacity discussed in Chap. 4, the models of the annual cycle of frost hardiness can be tested continuously on a daily basis. The main environmental factors regulating the annual cycle of frost hardiness are air temperature and night length. These environmental factors regulate the annual cycle of frost hardiness directly and also indirectly by affecting the annual phenological cycle, which in turn changes the direct response. This complexity calls for development of integrated models that address both the fixed-sequence aspects of the phenological cycle and the fluctuating aspects of frost hardiness as such. Integrated models have been developed since the 1970s, and two of them are discussed in detail here. Both models are quite accurate, but there is still room for considerable improvement in their realism. Novel simulations using long-term air temperature records as input for an integrated model revealed large year-to-year variation in the annual cycle of frost hardiness.

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Hänninen HJP. The Annual Cycle of Frost Hardiness. In Hänninen H, editor, BOREAL AND TEMPERATE TREES IN A CHANGING CLIMATE: MODELLING THE ECOPHYSIOLOGY OF SEASONALITY. Springer. 2016. p. 173-216. (Biometeorology Series). https://doi.org/10.1007/978-94-017-7549-6_5