Cover Image

Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin

The recent finding of the influence of long-term persistence (LTP) in time series on trend significance has made the past findings of climatic trends in the Nile river basin (NRB) disputable. Four versions of the Mann-Kendall test including the latest one which considers the LTP in time series have...

Full description

Saved in:
Bibliographic Details
Main Authors: Nashwan, Mohamed Salem, Shahid, Shamsuddin
Format: Article
Published: Springer-Verlag Wien 2019
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/87596/
http://dx.doi.org/10.1007/s00704-018-2664-5
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utm.87596
record_format eprints
spelling my.utm.875962020-11-30T09:04:15Z http://eprints.utm.my/id/eprint/87596/ Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin Nashwan, Mohamed Salem Shahid, Shamsuddin TA Engineering (General). Civil engineering (General) The recent finding of the influence of long-term persistence (LTP) in time series on trend significance has made the past findings of climatic trends in the Nile river basin (NRB) disputable. Four versions of the Mann-Kendall test including the latest one which considers the LTP in time series have been used in this study to distinguish the unidirectional trend from natural variability of climate in NRB. The gridded Princeton global meteorological forcing data having 1-day and 0.25° temporal and spatial resolution, respectively, for the available period 1948–2010 was used. The results showed that the number of grid points showing a significant change in climate and weather extremes reduced drastically when LTP in time series was considered. The annual rainfall was increasing only at some locations in the main Nile and Atbara sub-basins at a rate of 0.26–26.4 mm/decade while decreasing in Sobat sub-basin up to − 76.6 mm/decade. The maximum temperatures were increasing in the main Nile, Atbara, Blue Nile, Bahr Elgazal, and Bahr Eljabel at a rate of 0.09–0.48 °C/decade, while the minimum temperatures were increasing in most parts of the NRB by 0.17–0.50 °C/decade. Among the weather extremes, a significant trend over a large part of NRB was found for extreme rainfall days (− 0.53–0.75 day/decade), cold nights (− 6.05–3.26 days/decade), heat waves (0.29–2.00 days/decade), and cold waves (− 4.05–1.15 day/decade). Springer-Verlag Wien 2019-07-01 Article PeerReviewed Nashwan, Mohamed Salem and Shahid, Shamsuddin (2019) Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin. Theoretical and Applied Climatology, 137 (1-2). pp. 1181-1199. ISSN 0177-798X http://dx.doi.org/10.1007/s00704-018-2664-5 DOI:10.1007/s00704-018-2664-5
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Nashwan, Mohamed Salem
Shahid, Shamsuddin
Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin
description The recent finding of the influence of long-term persistence (LTP) in time series on trend significance has made the past findings of climatic trends in the Nile river basin (NRB) disputable. Four versions of the Mann-Kendall test including the latest one which considers the LTP in time series have been used in this study to distinguish the unidirectional trend from natural variability of climate in NRB. The gridded Princeton global meteorological forcing data having 1-day and 0.25° temporal and spatial resolution, respectively, for the available period 1948–2010 was used. The results showed that the number of grid points showing a significant change in climate and weather extremes reduced drastically when LTP in time series was considered. The annual rainfall was increasing only at some locations in the main Nile and Atbara sub-basins at a rate of 0.26–26.4 mm/decade while decreasing in Sobat sub-basin up to − 76.6 mm/decade. The maximum temperatures were increasing in the main Nile, Atbara, Blue Nile, Bahr Elgazal, and Bahr Eljabel at a rate of 0.09–0.48 °C/decade, while the minimum temperatures were increasing in most parts of the NRB by 0.17–0.50 °C/decade. Among the weather extremes, a significant trend over a large part of NRB was found for extreme rainfall days (− 0.53–0.75 day/decade), cold nights (− 6.05–3.26 days/decade), heat waves (0.29–2.00 days/decade), and cold waves (− 4.05–1.15 day/decade).
format Article
author Nashwan, Mohamed Salem
Shahid, Shamsuddin
author_facet Nashwan, Mohamed Salem
Shahid, Shamsuddin
author_sort Nashwan, Mohamed Salem
title Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin
title_short Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin
title_full Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin
title_fullStr Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin
title_full_unstemmed Spatial distribution of unidirectional trends in climate and weather extremes in Nile river basin
title_sort spatial distribution of unidirectional trends in climate and weather extremes in nile river basin
publisher Springer-Verlag Wien
publishDate 2019
url http://eprints.utm.my/id/eprint/87596/
http://dx.doi.org/10.1007/s00704-018-2664-5
_version_ 1685578960220454912
score 13.211869

Similar Items