Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013
This study examines the climatology, inter-annual variability and long-term trends of dates of the first fall frost (FFF) and last spring frost (LSF) events, and lengths of the frost-free periods (FFP) by using daily minimum air temperature data from 80 stations in Turkey. Influences of the North At...
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ftunivege:oai:acikerisim.ege.edu.tr:11454/16678 2023-05-15T15:00:27+02:00 Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013 Erlat E. Türkeş M. Ege Üniversitesi 2016 https://hdl.handle.net/11454/16678 https://doi.org/10.3354/cr01397 eng eng Inter-Research 10.3354/cr01397 Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı Climate Research 0936577X https://doi.org/10.3354/cr01397 https://hdl.handle.net/11454/16678 69 2 155 176 info:eu-repo/semantics/closedAccess AO Climate variability Frost event changes Frost event climatology NAO Turkey article 2016 ftunivege https://doi.org/10.3354/cr01397 2022-05-02T06:48:48Z This study examines the climatology, inter-annual variability and long-term trends of dates of the first fall frost (FFF) and last spring frost (LSF) events, and lengths of the frost-free periods (FFP) by using daily minimum air temperature data from 80 stations in Turkey. Influences of the North Atlantic Oscillation (NAO) and the Arctic Oscillation (AO) teleconnection patterns on the variability of these climatic observations are also investigated. A trend towards later FFF and earlier LSF, and a resulting lengthened FFP are detected, with some regional differences, particularly in the Black Sea Region. Linear trend analysis of nationally averaged time series showed that the LSF occurred earlier by -0.64 d per decade, while the FFP occurred later with an increase rate of +0.71 d per decade over the study period. Correlation analysis revealed that year-to-year variations in occurrence dates of FFF, and LSF events and lengths of FFP could be explained by large-scale atmospheric circulation or oscillation patterns such as NAO/AO. Negative relationships were detected between the variability of dates of FFF events over Turkey and autumn indices of the NAO and AO indices. Correlation coefficients were statistically significant at the 1% level for the majority of stations. Positive linkages between the dates of the LSF events and the NAO and AO spring indices were obtained at most of the stations in Turkey. The lengths of FFP also tended to increase during negative NAO/AO index phases, while they tended to decrease during positive phases. © Inter-Research 2016. Article in Journal/Newspaper Arctic North Atlantic North Atlantic oscillation Ege University Institutional Repository Arctic Climate Research 69 2 155 176 |
institution |
Open Polar |
collection |
Ege University Institutional Repository |
op_collection_id |
ftunivege |
language |
English |
topic |
AO Climate variability Frost event changes Frost event climatology NAO Turkey |
spellingShingle |
AO Climate variability Frost event changes Frost event climatology NAO Turkey Erlat E. Türkeş M. Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013 |
topic_facet |
AO Climate variability Frost event changes Frost event climatology NAO Turkey |
description |
This study examines the climatology, inter-annual variability and long-term trends of dates of the first fall frost (FFF) and last spring frost (LSF) events, and lengths of the frost-free periods (FFP) by using daily minimum air temperature data from 80 stations in Turkey. Influences of the North Atlantic Oscillation (NAO) and the Arctic Oscillation (AO) teleconnection patterns on the variability of these climatic observations are also investigated. A trend towards later FFF and earlier LSF, and a resulting lengthened FFP are detected, with some regional differences, particularly in the Black Sea Region. Linear trend analysis of nationally averaged time series showed that the LSF occurred earlier by -0.64 d per decade, while the FFP occurred later with an increase rate of +0.71 d per decade over the study period. Correlation analysis revealed that year-to-year variations in occurrence dates of FFF, and LSF events and lengths of FFP could be explained by large-scale atmospheric circulation or oscillation patterns such as NAO/AO. Negative relationships were detected between the variability of dates of FFF events over Turkey and autumn indices of the NAO and AO indices. Correlation coefficients were statistically significant at the 1% level for the majority of stations. Positive linkages between the dates of the LSF events and the NAO and AO spring indices were obtained at most of the stations in Turkey. The lengths of FFP also tended to increase during negative NAO/AO index phases, while they tended to decrease during positive phases. © Inter-Research 2016. |
author2 |
Ege Üniversitesi |
format |
Article in Journal/Newspaper |
author |
Erlat E. Türkeş M. |
author_facet |
Erlat E. Türkeş M. |
author_sort |
Erlat E. |
title |
Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013 |
title_short |
Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013 |
title_full |
Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013 |
title_fullStr |
Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013 |
title_full_unstemmed |
Dates of frost onset, frost end and the frost-free season in Turkey: Trends, variability and links to the North Atlantic and Arctic Oscillation indices, 1950-2013 |
title_sort |
dates of frost onset, frost end and the frost-free season in turkey: trends, variability and links to the north atlantic and arctic oscillation indices, 1950-2013 |
publisher |
Inter-Research |
publishDate |
2016 |
url |
https://hdl.handle.net/11454/16678 https://doi.org/10.3354/cr01397 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic North Atlantic oscillation |
genre_facet |
Arctic North Atlantic North Atlantic oscillation |
op_relation |
10.3354/cr01397 Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı Climate Research 0936577X https://doi.org/10.3354/cr01397 https://hdl.handle.net/11454/16678 69 2 155 176 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3354/cr01397 |
container_title |
Climate Research |
container_volume |
69 |
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2 |
container_start_page |
155 |
op_container_end_page |
176 |
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1766332561331585024 |