Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO
International audience 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 expresse...
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Online Access: | https://hal.science/hal-01551134 https://hal.science/hal-01551134/document https://hal.science/hal-01551134/file/atmosphere-07-00084.pdf https://doi.org/10.3390/atmos7060084 |
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ftunimontpellier:oai:HAL:hal-01551134v1 2024-04-21T08:07:52+00:00 Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO Zamrane, Zineb Turki, Imen Laignel, Benoît, B. Mahe, Gil Laftouhi, Nour-Eddine Hydrosciences Montpellier (HSM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Faculté des Sciences Semlalia Marrakech Université Cadi Ayyad Marrakech (UCA) 2016 https://hal.science/hal-01551134 https://hal.science/hal-01551134/document https://hal.science/hal-01551134/file/atmosphere-07-00084.pdf https://doi.org/10.3390/atmos7060084 en eng HAL CCSD MDPI info:eu-repo/semantics/altIdentifier/doi/10.3390/atmos7060084 hal-01551134 https://hal.science/hal-01551134 https://hal.science/hal-01551134/document https://hal.science/hal-01551134/file/atmosphere-07-00084.pdf doi:10.3390/atmos7060084 http://creativecommons.org/licenses/by-nd/ info:eu-repo/semantics/OpenAccess ISSN: 2073-4433 EISSN: 2073-4433 Atmosphere https://hal.science/hal-01551134 Atmosphere, 2016, 7 (6), ⟨10.3390/atmos7060084⟩ precipitation Tensift basin wavelet analysis coherence analysis Morocco hydrological variability Ksob basin NAO [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2016 ftunimontpellier https://doi.org/10.3390/atmos7060084 2024-03-27T16:05:10Z International audience 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%. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Université de Montpellier: HAL Atmosphere 7 6 84 |
institution |
Open Polar |
collection |
Université de Montpellier: HAL |
op_collection_id |
ftunimontpellier |
language |
English |
topic |
precipitation Tensift basin wavelet analysis coherence analysis Morocco hydrological variability Ksob basin NAO [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
precipitation Tensift basin wavelet analysis coherence analysis Morocco hydrological variability Ksob basin NAO [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Zamrane, Zineb Turki, Imen Laignel, Benoît, B. Mahe, Gil Laftouhi, Nour-Eddine Characterization of the Interannual Variability of Precipitation and Streamflow in Tensift and Ksob Basins (Morocco) and Links with the NAO |
topic_facet |
precipitation Tensift basin wavelet analysis coherence analysis Morocco hydrological variability Ksob basin NAO [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience 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%. |
author2 |
Hydrosciences Montpellier (HSM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Faculté des Sciences Semlalia Marrakech Université Cadi Ayyad Marrakech (UCA) |
format |
Article in Journal/Newspaper |
author |
Zamrane, Zineb Turki, Imen Laignel, Benoît, B. Mahe, Gil Laftouhi, Nour-Eddine |
author_facet |
Zamrane, Zineb Turki, Imen Laignel, Benoît, B. Mahe, Gil Laftouhi, Nour-Eddine |
author_sort |
Zamrane, Zineb |
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 |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01551134 https://hal.science/hal-01551134/document https://hal.science/hal-01551134/file/atmosphere-07-00084.pdf https://doi.org/10.3390/atmos7060084 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 2073-4433 EISSN: 2073-4433 Atmosphere https://hal.science/hal-01551134 Atmosphere, 2016, 7 (6), ⟨10.3390/atmos7060084⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/atmos7060084 hal-01551134 https://hal.science/hal-01551134 https://hal.science/hal-01551134/document https://hal.science/hal-01551134/file/atmosphere-07-00084.pdf doi:10.3390/atmos7060084 |
op_rights |
http://creativecommons.org/licenses/by-nd/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3390/atmos7060084 |
container_title |
Atmosphere |
container_volume |
7 |
container_issue |
6 |
container_start_page |
84 |
_version_ |
1796947968025165824 |