Trend direction changes of Turkish temperature series in the first half of 1990s
The presented study was concentrated on the trend analysis of the annual mean temperature series of 40 meteorological stations in all climatic zones of Turkey. The sensitivity of the parametric and nonparametric tests to the selected record periods was investigated in detail. Backward-shifted and fo...
Published in: | Theoretical and Applied Climatology |
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2015
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ftdokuzeylueluni:e7f49941-72b8-4ff2-838d-87494a277a3c 2023-05-15T17:34:58+02:00 Trend direction changes of Turkish temperature series in the first half of 1990s DOĞAN, MUSTAFA ÜLKE, ASLI Cigizoglu, Hikmet Kerem 2015-07-01T00:00:00Z https://doi.org/10.1007/s00704-014-1209-9 https://avesis.deu.edu.tr/publication/details/e7f49941-72b8-4ff2-838d-87494a277a3c/oai eng eng e7f49941-72b8-4ff2-838d-87494a277a3c doi:10.1007/s00704-014-1209-9 https://avesis.deu.edu.tr/publication/details/e7f49941-72b8-4ff2-838d-87494a277a3c/oai info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2015 ftdokuzeylueluni https://doi.org/10.1007/s00704-014-1209-9 2022-06-01T07:17:30Z The presented study was concentrated on the trend analysis of the annual mean temperature series of 40 meteorological stations in all climatic zones of Turkey. The sensitivity of the parametric and nonparametric tests to the selected record periods was investigated in detail. Backward-shifted and forward-shifted trend analyses were accomplished by keeping either the beginning or the ending data period constant and varying the other period ending. This analysis resulted with a trend statistic direction turning point at the year 1992. Following this result, the trend tests were applied to three different records to distinguish the effect of 1992 on the trend direction. For the period 1950-1992, the downward trend was dominating several stations whereas only upward trend was observed for 1986-2006 period. Clearly, the trend direction change in 1992 dominated the trend behavior between 1986 and 2006. The opposite trend orientations on 1950-1992 and 1986-2006 periods seem to be neutralized on 1950-2006 period with the majority of the stations showing no trend as the result. This study displays the effect of different lengths of data record on the trend analysis results. It has been clear by this study that a sudden change on trend direction is obvious at the stations above 39 degrees N in Turkey provinces in 1992. These results are conformed to the previous studies related with climate change like temperature, sea level, meteorological observations, and dominant climatic events as North Atlantic Oscillation and El-Ni (n) over tildeo and Southern Oscillation. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Dokuz Eylül University Research Information System Theoretical and Applied Climatology 121 1-2 23 39 |
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Dokuz Eylül University Research Information System |
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ftdokuzeylueluni |
language |
English |
description |
The presented study was concentrated on the trend analysis of the annual mean temperature series of 40 meteorological stations in all climatic zones of Turkey. The sensitivity of the parametric and nonparametric tests to the selected record periods was investigated in detail. Backward-shifted and forward-shifted trend analyses were accomplished by keeping either the beginning or the ending data period constant and varying the other period ending. This analysis resulted with a trend statistic direction turning point at the year 1992. Following this result, the trend tests were applied to three different records to distinguish the effect of 1992 on the trend direction. For the period 1950-1992, the downward trend was dominating several stations whereas only upward trend was observed for 1986-2006 period. Clearly, the trend direction change in 1992 dominated the trend behavior between 1986 and 2006. The opposite trend orientations on 1950-1992 and 1986-2006 periods seem to be neutralized on 1950-2006 period with the majority of the stations showing no trend as the result. This study displays the effect of different lengths of data record on the trend analysis results. It has been clear by this study that a sudden change on trend direction is obvious at the stations above 39 degrees N in Turkey provinces in 1992. These results are conformed to the previous studies related with climate change like temperature, sea level, meteorological observations, and dominant climatic events as North Atlantic Oscillation and El-Ni (n) over tildeo and Southern Oscillation. |
format |
Article in Journal/Newspaper |
author |
DOĞAN, MUSTAFA ÜLKE, ASLI Cigizoglu, Hikmet Kerem |
spellingShingle |
DOĞAN, MUSTAFA ÜLKE, ASLI Cigizoglu, Hikmet Kerem Trend direction changes of Turkish temperature series in the first half of 1990s |
author_facet |
DOĞAN, MUSTAFA ÜLKE, ASLI Cigizoglu, Hikmet Kerem |
author_sort |
DOĞAN, MUSTAFA |
title |
Trend direction changes of Turkish temperature series in the first half of 1990s |
title_short |
Trend direction changes of Turkish temperature series in the first half of 1990s |
title_full |
Trend direction changes of Turkish temperature series in the first half of 1990s |
title_fullStr |
Trend direction changes of Turkish temperature series in the first half of 1990s |
title_full_unstemmed |
Trend direction changes of Turkish temperature series in the first half of 1990s |
title_sort |
trend direction changes of turkish temperature series in the first half of 1990s |
publishDate |
2015 |
url |
https://doi.org/10.1007/s00704-014-1209-9 https://avesis.deu.edu.tr/publication/details/e7f49941-72b8-4ff2-838d-87494a277a3c/oai |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
e7f49941-72b8-4ff2-838d-87494a277a3c doi:10.1007/s00704-014-1209-9 https://avesis.deu.edu.tr/publication/details/e7f49941-72b8-4ff2-838d-87494a277a3c/oai |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00704-014-1209-9 |
container_title |
Theoretical and Applied Climatology |
container_volume |
121 |
container_issue |
1-2 |
container_start_page |
23 |
op_container_end_page |
39 |
_version_ |
1766133972522237952 |