Biometeorological study in urban Mediterranean climatic zone: Contribution to the evaluation of thermal sensation

Postgraduate Thesis uoadl:1316563 126 Read counter

Unit:
Τομέας Φυσικής Εφαρμογών
Library of the School of Science
Deposit date:
2014-03-14
Year:
2014
Author:
Πανταβού Αικατερίνη
Supervisors info:
Θεοχαράτος Γεώργιος Αναπλ. Καθηγητής ΕΚΠΑ (επιβλέπων), Ασημακόπουλος Δημοσθένης Καθηγητής ΕΚΠΑ, Σανταμούρης Ματθαίος Καθηγητής ΕΚΠΑ
Original Title:
Βιομετεωρολογική μελέτη σε αστική Μεσογειακή κλιματική ζώνη: Συμβολή στην αξιολόγηση της θερμικής αίσθησης
Languages:
Greek
Translated title:
Biometeorological study in urban Mediterranean climatic zone: Contribution to the evaluation of thermal sensation
Summary:
The current thesis deals with individual thermal sensation and its relationship
with the Mediterranean thermal environment. The effect of weather, personal and
psychological factors on thermal sensation is examined. A simple
thermo-physiological predictive model of thermal sensation adjusted with
psychological factors is developed while the potential of a large number of
bioclimatic indices to predict thermal sensation is investigated and their
assessment scales are calibrated in order to be properly used to assess thermal
comfort in outdoor spaces in Athens, Greece and in Mediterranean climates as
well. Data were obtained by field questionnaire surveys carried out
simultaneously with weather measurements, in public outdoor urban areas in
Athens.
The respondents appeared to be tolerant to the variability of thermal
environment and preferred warmer thermal conditions indicating a potential
underestimation of risks due to heat exposure. Thermal sensation was defined by
weather, personal and psychological factors. The most important factors
determining thermal sensation were air temperature, wind speed, clothing
insulation and season. A simple thermo-physiological model of outdoor thermal
sensation adjusted with psychological factors was developed aiming to predict
thermal sensation in Mediterranean climates. The model based on ordinal
regression reproduced extreme values of thermal sensation vote more adequately
than the linear regression one. Moreover, it was revealed that thermal
sensation vote could be predicted by choosing a small number of properly
selected parameters as well.
The analysis of thermal sensation as predicted by bioclimatic indices revealed
the necessity of calibration in order to be applied in an outdoor urban
Mediterranean climate. The majority of the indices predicted successfully about
35% of thermal sensation votes while only a few exceeded 40% correct
predictions. According to the criteria posed in this study Universal Thermal
Climate Index (UTCI), Subjective Temperature Index (STI), Actual Sensation Vote
(ASV) using the equation for Europe and Equivalent Temperature (Teq) reproduced
more adequately thermal sensation votes in relation to the rest of the indices.
Finally, linear and polynomial regression and probit analysis were applied in
order to calibrate the assessment scales of the bioclimatic indices. The
calibrated assessment scales were narrower compared to the original scales,
whereas the values corresponding to each class were higher compared to the
original ones. The Mediterranean scales based on linear and polynomial
regression were similar while significant differences were observed in relation
to the scales developed by probit analysis. Probit analysis yielded better
results than linear and polynomial regression, improving significantly the
predictive ability of the indices.
Keywords:
Thermal sensation, Questionnaire survey, Predictive model, Empirical calibration, Outdoor urban spaces
Index:
Yes
Number of index pages:
191-195, 197-198
Contains images:
No
Number of references:
202
Number of pages:
[4], 296
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