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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ftird:oai:ird.fr:fdi:010067628 2023-05-15T17:33:49+02:00 Characterization of the interannual variability of precipitation and streamflow in Tensift and Ksob basins (Morocco) and links with the NAO Zamrane, Z. Turki, I. Laignel, B. Mahé, Gil Laftouhi, N. E. MAROC 2016 http://www.documentation.ird.fr/hor/fdi:010067628 EN eng http://www.documentation.ird.fr/hor/fdi:010067628 oai:ird.fr:fdi:010067628 Zamrane Z., Turki I., Laignel B., Mahé Gil, Laftouhi N. E. Characterization of the interannual variability of precipitation and streamflow in Tensift and Ksob basins (Morocco) and links with the NAO. Atmosphere, 2016, 7 (6), p. art. 84 [21 p.]. hydrological variability precipitation NAO wavelet analysis coherence analysis Morocco Tensift basin Ksob basin text 2016 ftird 2020-08-21T06:51:35Z 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 IRD (Institute de recherche pour le développement): Horizon |
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Open Polar |
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IRD (Institute de recherche pour le développement): Horizon |
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ftird |
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 Zamrane, Z. Turki, I. Laignel, B. Mahé, Gil Laftouhi, N. E. 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 |
Zamrane, Z. Turki, I. Laignel, B. Mahé, Gil Laftouhi, N. E. |
author_facet |
Zamrane, Z. Turki, I. Laignel, B. Mahé, Gil Laftouhi, N. E. |
author_sort |
Zamrane, Z. |
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 |
publishDate |
2016 |
url |
http://www.documentation.ird.fr/hor/fdi:010067628 |
op_coverage |
MAROC |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://www.documentation.ird.fr/hor/fdi:010067628 oai:ird.fr:fdi:010067628 Zamrane Z., Turki I., Laignel B., Mahé Gil, Laftouhi N. E. Characterization of the interannual variability of precipitation and streamflow in Tensift and Ksob basins (Morocco) and links with the NAO. Atmosphere, 2016, 7 (6), p. art. 84 [21 p.]. |
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