Recent changes in continentality and aridity conditions over the Middle East and North Africa region, and their association with circulation patterns

Handle URI:
http://hdl.handle.net/10754/621076
Title:
Recent changes in continentality and aridity conditions over the Middle East and North Africa region, and their association with circulation patterns
Authors:
El Kenawy, Ahmed M. ( 0000-0001-6639-6253 ) ; McCabe, Matthew ( 0000-0002-1279-5272 ) ; Vicente-Serrano, Sergio M.; Robaa, Sayed M.; Lopez-Moreno, Juan I.
Abstract:
A long-term (1960-2013) assessment of the variability of continentality and aridity conditions over the Middle East and North Africa (MENA) region was undertaken. Monthly gridded temperature and precipitation data from the Climate Research Unit (CRU) (TS3.22 version) were used to compute the Johansson Continentality Index (JCI) and the Marsz Oceanity Index (MOI). In addition, the De Martonne index and the Pinna index were employed to assess recent changes in aridity conditions. All indices revealed a statistically significant increase in continental influences over the region, particularly in the Nile Basin and the Fertile Crescent. For aridity, the results suggested a generally statistically insignificant increase, with the most rapid changes occurring over the most humid regions (i.e. the Ethiopian Highlands and the Fertile Crescent). In order to explain the observed changes in the continentality and aridity conditions, we assessed the relationship between aridity and continentality indices and a wide range of large-scale circulation patterns. Results indicate that the spatial variability of continentality (as well as aridity) was closely coupled with the Atlantic modes of variability, e.g. the Eastern Atlantic pattern and the Atlantic Meridional Mode, compared to those of the Mediterranean Sea and the Indian Ocean. The results of this work highlight change processes in 2 important climate features in one of the hottest regions on Earth. Improving our understanding of the spatio-temporal characteristics of climate continentality and aridity has implications for a diversity of socio-political, economic, hydrological, and ecological activities in the MENA region.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)
Citation:
El Kenawy A, McCabe M, Vicente-Serrano S, Robaa S, Lopez-Moreno J (2016) Recent changes in continentality and aridity conditions over the Middle East and North Africa region, and their association with circulation patterns. Clim Res 69: 25–43. Available: http://dx.doi.org/10.3354/cr01389.
Publisher:
Inter-Research Science Center
Journal:
Climate Research
Issue Date:
30-May-2016
DOI:
10.3354/cr01389
Type:
Article
ISSN:
0936-577X; 1616-1572
Sponsors:
Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST), Saudi Arabia. We wish to thank the Climate Research Unit (CRU) at the University of East Anglia (UK) for providing their data.
Additional Links:
http://www.int-res.com/abstracts/cr/v69/n1/p25-43/
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorEl Kenawy, Ahmed M.en
dc.contributor.authorMcCabe, Matthewen
dc.contributor.authorVicente-Serrano, Sergio M.en
dc.contributor.authorRobaa, Sayed M.en
dc.contributor.authorLopez-Moreno, Juan I.en
dc.date.accessioned2016-10-19T12:28:01Z-
dc.date.available2016-10-19T12:28:01Z-
dc.date.issued2016-05-30en
dc.identifier.citationEl Kenawy A, McCabe M, Vicente-Serrano S, Robaa S, Lopez-Moreno J (2016) Recent changes in continentality and aridity conditions over the Middle East and North Africa region, and their association with circulation patterns. Clim Res 69: 25–43. Available: http://dx.doi.org/10.3354/cr01389.en
dc.identifier.issn0936-577Xen
dc.identifier.issn1616-1572en
dc.identifier.doi10.3354/cr01389en
dc.identifier.urihttp://hdl.handle.net/10754/621076-
dc.description.abstractA long-term (1960-2013) assessment of the variability of continentality and aridity conditions over the Middle East and North Africa (MENA) region was undertaken. Monthly gridded temperature and precipitation data from the Climate Research Unit (CRU) (TS3.22 version) were used to compute the Johansson Continentality Index (JCI) and the Marsz Oceanity Index (MOI). In addition, the De Martonne index and the Pinna index were employed to assess recent changes in aridity conditions. All indices revealed a statistically significant increase in continental influences over the region, particularly in the Nile Basin and the Fertile Crescent. For aridity, the results suggested a generally statistically insignificant increase, with the most rapid changes occurring over the most humid regions (i.e. the Ethiopian Highlands and the Fertile Crescent). In order to explain the observed changes in the continentality and aridity conditions, we assessed the relationship between aridity and continentality indices and a wide range of large-scale circulation patterns. Results indicate that the spatial variability of continentality (as well as aridity) was closely coupled with the Atlantic modes of variability, e.g. the Eastern Atlantic pattern and the Atlantic Meridional Mode, compared to those of the Mediterranean Sea and the Indian Ocean. The results of this work highlight change processes in 2 important climate features in one of the hottest regions on Earth. Improving our understanding of the spatio-temporal characteristics of climate continentality and aridity has implications for a diversity of socio-political, economic, hydrological, and ecological activities in the MENA region.en
dc.description.sponsorshipResearch reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST), Saudi Arabia. We wish to thank the Climate Research Unit (CRU) at the University of East Anglia (UK) for providing their data.en
dc.publisherInter-Research Science Centeren
dc.relation.urlhttp://www.int-res.com/abstracts/cr/v69/n1/p25-43/en
dc.rightsAccepted manuscript of article published in Climate Research. Final, publisher version available at: http://doi.org/10.3354/cr01389en
dc.subjectContinentalityen
dc.subjectAridityen
dc.subjectPrecipitationen
dc.subjectTemperatureen
dc.subjectCirculation patternsen
dc.subjectMiddle East and North Africaen
dc.subjectMENAen
dc.titleRecent changes in continentality and aridity conditions over the Middle East and North Africa region, and their association with circulation patternsen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalClimate Researchen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Geography, Mansoura University, Mansoura 35516, Egypten
dc.contributor.institutionInstituto Pirenaico de Ecología, Spanish National Research Council (IPE-CSIC), Zaragoza, 50059, Spainen
dc.contributor.institutionDepartment of Astronomy, Space Science and Meteorology, Faculty of Science, Cairo University 12613, Egypten
kaust.authorEl Kenawy, Ahmed M.en
kaust.authorMcCabe, Matthewen
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