EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009

EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009

The present study investigates variations of four, so called “Core” extreme temperature indices. For the period of 1959-2009 based on the STARDEX project, data from 16 weather stations located in the eastern Bulgaria were analyzed. The temperature indices include the threshold of 0°C, which is appli...

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Main Author: VENETA IVANOVA
Format: Article
Language:English
Published: Cluj University Press 2016-03-01
Series:Aerul şi Apa: Componente ale Mediului
Subjects:
eastern Bulgaria
extreme temperature index
STARDEX
Mann-Kendall test
Sen’s slope
Online Access:http://aerapa.conference.ubbcluj.ro/2016/pdf/15_Veneta_117_124.pdf
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spelling doaj-4565ee8523f14c54ad5cf47c269b0b722020-11-24T22:49:22ZengCluj University PressAerul şi Apa: Componente ale Mediului2067-743X2016-03-01201611712410.17378/AWC2016_15EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009 VENETA IVANOVA 0National Institute of Meteorology and Hydrology – branch Varna, BAS, 10 Sveti Nikola district, Varna 9010 , BulgariaThe present study investigates variations of four, so called “Core” extreme temperature indices. For the period of 1959-2009 based on the STARDEX project, data from 16 weather stations located in the eastern Bulgaria were analyzed. The temperature indices include the threshold of 0°C, which is applicable for almost every type of climate: two indices refer to the degree of extrema (txq90-Tmax 90th percentile, tnq10-Tmin 10th percentile) and two - to the frequency (tnfd-Number of frost days Tmin<0°C, txhwd-Heat wave duration). Some statistical parameters for every index were also calculated. For the trends calculation and detection of significance, the Mann-Kendall and Sen’s slope estimator were applied. The spatial distribution of the trends shows similar behavior for the most of stations in every season. The Txq90 series are characterized by statistically significant increasing slopes. http://aerapa.conference.ubbcluj.ro/2016/pdf/15_Veneta_117_124.pdfeastern Bulgariaextreme temperature indexSTARDEXMann-Kendall testSen’s slope
collection DOAJ
language English
format Article
sources DOAJ
author VENETA IVANOVA
spellingShingle VENETA IVANOVA
EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009
Aerul şi Apa: Componente ale Mediului
eastern Bulgaria
extreme temperature index
STARDEX
Mann-Kendall test
Sen’s slope
author_facet VENETA IVANOVA
author_sort VENETA IVANOVA
title EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009
title_short EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009
title_full EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009
title_fullStr EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009
title_full_unstemmed EXTREME TEMPERATURES TRENDS IN EASTERN BULGARIA DURING THE PERIOD 1959-2009
title_sort extreme temperatures trends in eastern bulgaria during the period 1959-2009
publisher Cluj University Press
series Aerul şi Apa: Componente ale Mediului
issn 2067-743X
publishDate 2016-03-01
description The present study investigates variations of four, so called “Core” extreme temperature indices. For the period of 1959-2009 based on the STARDEX project, data from 16 weather stations located in the eastern Bulgaria were analyzed. The temperature indices include the threshold of 0°C, which is applicable for almost every type of climate: two indices refer to the degree of extrema (txq90-Tmax 90th percentile, tnq10-Tmin 10th percentile) and two - to the frequency (tnfd-Number of frost days Tmin<0°C, txhwd-Heat wave duration). Some statistical parameters for every index were also calculated. For the trends calculation and detection of significance, the Mann-Kendall and Sen’s slope estimator were applied. The spatial distribution of the trends shows similar behavior for the most of stations in every season. The Txq90 series are characterized by statistically significant increasing slopes.
topic eastern Bulgaria
extreme temperature index
STARDEX
Mann-Kendall test
Sen’s slope
url http://aerapa.conference.ubbcluj.ro/2016/pdf/15_Veneta_117_124.pdf
work_keys_str_mv AT venetaivanova extremetemperaturestrendsineasternbulgariaduringtheperiod19592009
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