Hydrological drought variability and its teleconnections with climate indices
In this study, the spatial-temporal variability of hydrological drought in Meric Basin, Turkey, has been examined, and its relationship with global climate oscillations has been explored. Prior to drought analysis, streamflow data gaps were filled, and series homogeneity was examined. The standardiz...
Published in: | Journal of Hydrology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/11454/76663 https://doi.org/10.1016/j.jhydrol.2021.127290 |
id |
ftunivege:oai:acikerisim.ege.edu.tr:11454/76663 |
---|---|
record_format |
openpolar |
spelling |
ftunivege:oai:acikerisim.ege.edu.tr:11454/76663 2023-05-15T17:31:05+02:00 Hydrological drought variability and its teleconnections with climate indices Abdelkader, Mohamed Yerdelen, Cahit 2022 https://hdl.handle.net/11454/76663 https://doi.org/10.1016/j.jhydrol.2021.127290 en eng Elsevier Journal Of Hydrology Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı 0022-1694 1879-2707 https://doi.org/10.1016/j.jhydrol.2021.127290 https://hdl.handle.net/11454/76663 doi:10.1016/j.jhydrol.2021.127290 605 WOS:000752453100004 2-s2.0-85121285648 info:eu-repo/semantics/closedAccess Drought variability Wavelet analysis Standardized streamflow index Teleconnections North-Atlantic Oscillation Streamflow Variability Wavelet Transform Trend Analysis Missing Data Basin Homogeneity Pacific Impacts Turkey Article 2022 ftunivege https://doi.org/10.1016/j.jhydrol.2021.127290 2023-01-19T17:48:36Z In this study, the spatial-temporal variability of hydrological drought in Meric Basin, Turkey, has been examined, and its relationship with global climate oscillations has been explored. Prior to drought analysis, streamflow data gaps were filled, and series homogeneity was examined. The standardized streamflow index (SSFI) was used to detect drought periods from monthly streamflow data of nine stations well spread over the study area. The hydrological drought intensity, magnitude, and duration were investigated using the SSFI time series. The drought variability was assessed by performing trend analysis and wavelet transforms. Trend analysis showed an increase in drought events in the Northern region and a decrease in the Southern region of the basin. Wavelet analysis reveals that the 4-10 year scales explicate the drought series pattern. The identification of climate patterns that are most associated with drought variability is performed via correlation analysis. The investigation showed that distinct climate patterns simultaneously influence drought events. Significantly, the influence of El Nino Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Atlantic Multidecadal Oscillation (AMO) is notable. The analysis demonstrated a remarkable correlation between ENSO and SSFI series at the interannual scale (2-8 years). The obtained phase difference suggests that the maximum dry (wet) conditions coincide with La Nina (El Nino) events. In addition, positive NAO phases and negative AMO phases lead to drought occurrence. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Ege University Institutional Repository Pacific Journal of Hydrology 605 127290 |
institution |
Open Polar |
collection |
Ege University Institutional Repository |
op_collection_id |
ftunivege |
language |
English |
topic |
Drought variability Wavelet analysis Standardized streamflow index Teleconnections North-Atlantic Oscillation Streamflow Variability Wavelet Transform Trend Analysis Missing Data Basin Homogeneity Pacific Impacts Turkey |
spellingShingle |
Drought variability Wavelet analysis Standardized streamflow index Teleconnections North-Atlantic Oscillation Streamflow Variability Wavelet Transform Trend Analysis Missing Data Basin Homogeneity Pacific Impacts Turkey Abdelkader, Mohamed Yerdelen, Cahit Hydrological drought variability and its teleconnections with climate indices |
topic_facet |
Drought variability Wavelet analysis Standardized streamflow index Teleconnections North-Atlantic Oscillation Streamflow Variability Wavelet Transform Trend Analysis Missing Data Basin Homogeneity Pacific Impacts Turkey |
description |
In this study, the spatial-temporal variability of hydrological drought in Meric Basin, Turkey, has been examined, and its relationship with global climate oscillations has been explored. Prior to drought analysis, streamflow data gaps were filled, and series homogeneity was examined. The standardized streamflow index (SSFI) was used to detect drought periods from monthly streamflow data of nine stations well spread over the study area. The hydrological drought intensity, magnitude, and duration were investigated using the SSFI time series. The drought variability was assessed by performing trend analysis and wavelet transforms. Trend analysis showed an increase in drought events in the Northern region and a decrease in the Southern region of the basin. Wavelet analysis reveals that the 4-10 year scales explicate the drought series pattern. The identification of climate patterns that are most associated with drought variability is performed via correlation analysis. The investigation showed that distinct climate patterns simultaneously influence drought events. Significantly, the influence of El Nino Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Atlantic Multidecadal Oscillation (AMO) is notable. The analysis demonstrated a remarkable correlation between ENSO and SSFI series at the interannual scale (2-8 years). The obtained phase difference suggests that the maximum dry (wet) conditions coincide with La Nina (El Nino) events. In addition, positive NAO phases and negative AMO phases lead to drought occurrence. |
format |
Article in Journal/Newspaper |
author |
Abdelkader, Mohamed Yerdelen, Cahit |
author_facet |
Abdelkader, Mohamed Yerdelen, Cahit |
author_sort |
Abdelkader, Mohamed |
title |
Hydrological drought variability and its teleconnections with climate indices |
title_short |
Hydrological drought variability and its teleconnections with climate indices |
title_full |
Hydrological drought variability and its teleconnections with climate indices |
title_fullStr |
Hydrological drought variability and its teleconnections with climate indices |
title_full_unstemmed |
Hydrological drought variability and its teleconnections with climate indices |
title_sort |
hydrological drought variability and its teleconnections with climate indices |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/11454/76663 https://doi.org/10.1016/j.jhydrol.2021.127290 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
Journal Of Hydrology Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı 0022-1694 1879-2707 https://doi.org/10.1016/j.jhydrol.2021.127290 https://hdl.handle.net/11454/76663 doi:10.1016/j.jhydrol.2021.127290 605 WOS:000752453100004 2-s2.0-85121285648 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.jhydrol.2021.127290 |
container_title |
Journal of Hydrology |
container_volume |
605 |
container_start_page |
127290 |
_version_ |
1766128395226185728 |