Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO
The aim of this study is to understand the inter-annual hydrological variability (precipitation and streamflow) in the basins of the High Atlas in Morocco and to determine how climate fluctuations (represented by the North Atlantic Oscillation (NAO) climate index) are expressed in the hydrological s...
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ftmdpi:oai:mdpi.com:/2073-4433/7/6/84/ 2023-08-20T04:08:24+02:00 Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO Zineb Zamrane Imen Turki Benoit Laignel Gil Mahé Nour-Eddine Laftouhi agris 2016-06-17 application/pdf https://doi.org/10.3390/atmos7060084 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/atmos7060084 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 7; Issue 6; Pages: 84 hydrological variability precipitation NAO wavelet analysis coherence analysis Morocco Tensift basin Ksob basin Text 2016 ftmdpi https://doi.org/10.3390/atmos7060084 2023-07-31T20:54:18Z The aim of this study is to understand the inter-annual hydrological variability (precipitation and streamflow) in the basins of the High Atlas in Morocco and to determine how climate fluctuations (represented by the North Atlantic Oscillation (NAO) climate index) are expressed in the hydrological system. To reach this objective, time series of precipitation and streamflow are processed as standardized anomalies and studied by continuous wavelet analysis and wavelet coherence analysis, which are particularly suitable for the study of unsteady processes. Wet and dry periods vary from one basin to another between three and five years. The wavelet analysis shows the existence of many bands of energy in most of the sub-basins, from annual to inter-annual scales regarding the precipitation and streamflow time series. These bands correspond to intervals of one year, 2–4 years, 4–8 years and 8–12 years. The wavelet coherence analysis shows a strong coherence between NAO/streamflow and precipitation/NAO identified at the inter-annual scale. Non-stationarity can be observed in the late 1980s, 1990s and 2000s. The contribution of the NAO is different from one basin to another ranging between 67% and 77%. Text North Atlantic North Atlantic oscillation MDPI Open Access Publishing Atmosphere 7 6 84 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
hydrological variability precipitation NAO wavelet analysis coherence analysis Morocco Tensift basin Ksob basin |
spellingShingle |
hydrological variability precipitation NAO wavelet analysis coherence analysis Morocco Tensift basin Ksob basin Zineb Zamrane Imen Turki Benoit Laignel Gil Mahé Nour-Eddine Laftouhi Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO |
topic_facet |
hydrological variability precipitation NAO wavelet analysis coherence analysis Morocco Tensift basin Ksob basin |
description |
The aim of this study is to understand the inter-annual hydrological variability (precipitation and streamflow) in the basins of the High Atlas in Morocco and to determine how climate fluctuations (represented by the North Atlantic Oscillation (NAO) climate index) are expressed in the hydrological system. To reach this objective, time series of precipitation and streamflow are processed as standardized anomalies and studied by continuous wavelet analysis and wavelet coherence analysis, which are particularly suitable for the study of unsteady processes. Wet and dry periods vary from one basin to another between three and five years. The wavelet analysis shows the existence of many bands of energy in most of the sub-basins, from annual to inter-annual scales regarding the precipitation and streamflow time series. These bands correspond to intervals of one year, 2–4 years, 4–8 years and 8–12 years. The wavelet coherence analysis shows a strong coherence between NAO/streamflow and precipitation/NAO identified at the inter-annual scale. Non-stationarity can be observed in the late 1980s, 1990s and 2000s. The contribution of the NAO is different from one basin to another ranging between 67% and 77%. |
format |
Text |
author |
Zineb Zamrane Imen Turki Benoit Laignel Gil Mahé Nour-Eddine Laftouhi |
author_facet |
Zineb Zamrane Imen Turki Benoit Laignel Gil Mahé Nour-Eddine Laftouhi |
author_sort |
Zineb Zamrane |
title |
Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO |
title_short |
Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO |
title_full |
Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO |
title_fullStr |
Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO |
title_full_unstemmed |
Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO |
title_sort |
characterization of the interannual variability of precipitation and streamflow in tensift and ksob basins (morocco) and links with the nao |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2016 |
url |
https://doi.org/10.3390/atmos7060084 |
op_coverage |
agris |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Atmosphere; Volume 7; Issue 6; Pages: 84 |
op_relation |
https://dx.doi.org/10.3390/atmos7060084 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos7060084 |
container_title |
Atmosphere |
container_volume |
7 |
container_issue |
6 |
container_start_page |
84 |
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1774720649892200448 |