Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2009
Volume 12
Issue 4
Topic:
Agronomy
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Chabior M. , Michalska B. 2009. VARIABILITY OF SENSIBLE TEMPERATURE (STI) IN NORTH-EAST POLAND, EJPAU 12(4), #22.
Available Online: http://www.ejpau.media.pl/volume12/issue4/abs-22.html

VARIABILITY OF SENSIBLE TEMPERATURE (STI) IN NORTH-EAST POLAND

Marek Chabior1, Bożena Michalska2
1 Department of Marine Ecology and Environmental Protection, West Pomeranian University of Technology in Szczecin, Poland
2 Department of Meteorology and Climatology, West Pomeranian University of Technology in Szczecin, Poland

 

ABSTRACT


In order to estimate the biothermic conditions of north-east
Poland, Błażejczyk’s sensible temperature index STI was applied, which
is based on the analysis of human heat balance. STI value was determined
using the simplified version of the model based on the following term data from
12 o’clock UTC: air temperature, relative air humidity, steam pressure, wind
speed, and cloudiness by low (CL) and middle (CM) clouds.
Data were taken from 10 meteorological stations in north-east Poland, and the
period of the study was years 1966–2000. Sensible temperature index STI fell
within the range of below -38°C to over 55°C. To the particular
values of the STI index, Błażejczyk attributed heat sensations in a seven-degree
scale of subjective heat sensations – from "very cold" to "very hot". Mean STI values
and the frequency of the occurrence of the particular heat sensations were presented
for months, seasons, and a year. Time trends of sensible temperature STI were
determined for four seasons and a year, and a spatial diversification of this
index in north-east Poland was carried out. Sensible temperature STI showed
a statistically significant increase in the period of 35 years in all seasons
only in Suwałki, and at the remaining stations, a significant increasing trend
of this temperature occurs during spring and winter. The highest sensible temperature
increase, from 0.57°C in Płock to 1.99°C in Suwałki fell
in the spring, except the station in Ostrołęka where in that season, a negative
and statistically insignificant tendency was noted. Spatial picture of the distribution
of sensible temperature STI shows an increase in its values from the north
towards the south of the studied area in all the seasons of the year except winter,
in which a decrease in STI values takes a direction from SW to NE.

Key words: heat sensations, time trends, spatial diversification.

Marek Chabior
Department of Marine Ecology and Environmental Protection,
West Pomeranian University of Technology in Szczecin, Poland
Papieża Pawła VI 3, 71-459 Szczecin, Poland
email: marek.chabior@zut.edu.pl

Bożena Michalska
Department of Meteorology and Climatology,
West Pomeranian University of Technology in Szczecin, Poland
Kazimierza Królewicza 4, 71-550 Szczecin, Poland
email: bozena.michalska@zut.edu.pl

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.

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