Relationship between tree bark surface temperature and selected meteorological elements

  • Tomáš STŘEDA Mendel University in Brno, Czech Republic
  • Tomáš LITSCHMANN AMET, Žižkovská 1230, 691 02, Velké Bílovice, Czech Republic
  • Hana STŘEDOVÁ Mendel University in Brno, Czech Republic
Keywords: orchards, bark temperature, microclimate, solar radiation, air temperature, phenology

Abstract

The results were obtained by measurements in 2014 and 2015 in an apple
orchard in Starý Lískovec and Těšetice (South Moravia, Czech Republic, Central Europe)
into fertile planting of apple trees. The results show that the bark surface temperature
during the year slightly differs from the surrounding air temperature. In addition, it is in
average a few tenths of a °C higher in the period before the onset of the vegetation and
several tenths of a degree lower during vegetation. Causes of these differences appear to
be associated with the flow of sap as well as with foliage. Although it can be reasonably
assumed that the temperature of the bark surface on the south side will be significantly
affected by the global radiation, our measurements did not demonstrate this dependency.
It appears that the wind speed had significantly larger influence on the temperature differences
in the non-vegetation period as at speeds over 3.5 ms−1, the drop of temperature
is so significant that the bark surface is colder than the surrounding air. Comparison
of the development of sums of daily and hourly effective temperatures above 10 °C has
shown that where daily values do not show significant differences, hourly values differed
so prominently that the calculated date of emergence of adult codling moth in the bark
surface was approximately one week earlier than with the use of data for air temperatures.

Author Biographies

Tomáš STŘEDA, Mendel University in Brno, Czech Republic

Department of Crop Science, Breeding and Plant Medicine,

Hana STŘEDOVÁ, Mendel University in Brno, Czech Republic

Department of Applied and Landscape Ecology

Published
2015-12-30
How to Cite
STŘEDA, T., LITSCHMANN, T., & STŘEDOVÁ, H. (2015). Relationship between tree bark surface temperature and selected meteorological elements. Contributions to Geophysics and Geodesy, 45(4), 299-311. https://doi.org/10.1515/congeo-2015-0026
Section
original research papers