Searching for evidence of changes in extreme rainfall indices in the Central Rift Valley of Ethiopia

Muluneh, Alemayehu; Bewket, Woldeamlak; Keesstra, Saskia; Stroosnijder, L.

doi:10.1007/s00704-016-1739-4

Cited by 30 publications

(28 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The previous analysis of the station-level rainfall trend (Muluneh et al 2017) was consistent with our analysis of the regional trend where stations on the valley floor showed an increasing trend and stations in the escarpments/highlands showed a decreasing trend. The increased temperature due to high deforestation and a presence of a chain of lakes in the rift valley floor could also attribute for increased rainfall in the rift valley floor.…”

Section: Rainfall and Temperature Trends Rainfall Trendssupporting

confidence: 89%

“…Based on the Central Rift Valley climate data analysis ) mean annual rainfall and mean annual temperature range from 737 to 955 mm and 17 to 20°C, respectively (Muluneh et al 2017). The region has three main seasons.…”

Section: The Study Areamentioning

confidence: 99%

“…(ii) Rainfalls between areas were compared within the same climatic type, one area forested and the other without natural vegetation. The annual rainfall trends were spatially distinct between the valley floor and the adjoining highlands (Muluneh et al 2017), so the relationship between forest depletion and rainfall pattern were determined separately for the valley floor and the escarpments/highlands. The long-term temperature trend were analysed by categorising the meteorological stations with temperature data in their respective landscape units: valley floor and escarpments/highlands.…”

Section: Data Analysis Long-term Trends Of Rainfall and Temperaturementioning

confidence: 99%

“…The RK test is applicable to data from numerous locations, and one overall test can determine whether the same trend is evident across those locations (Helsel and Frans 2006). The station-level trend for rainfall was not analysed, because this analysis for most of the stations in this study has been published in the previous study (Muluneh et al 2017). …”

Section: Data Analysis Long-term Trends Of Rainfall and Temperaturementioning

confidence: 99%

See 3 more Smart Citations

Effects of long-term deforestation and remnant forests on rainfall and temperature in the Central Rift Valley of Ethiopia

Muluneh

Loon²,

Bewket

et al. 2017

For. Ecosyst.

Self Cite

View full text Add to dashboard Cite

Background: Some evidence suggests that forests attract rain and that deforestation contributes to changes in rainfall and temperature. The evidence, however, is scant, particularly on smaller spatial scales. The specific objectives of the study were: (i) to evaluate long-term trends in rainfall (1970-2009) and temperature (1981-2009) and their relationships with change in forest cover, and (ii) to assess the influence of remnant forests and topographical factors on the spatial variability of annual rainfall.

show abstract

Section: Rainfall and Temperature Trends Rainfall Trendssupporting

confidence: 89%

Section: The Study Areamentioning

confidence: 99%

Section: Data Analysis Long-term Trends Of Rainfall and Temperaturementioning

confidence: 99%

Section: Data Analysis Long-term Trends Of Rainfall and Temperaturementioning

confidence: 99%

See 2 more Smart Citations

Effects of long-term deforestation and remnant forests on rainfall and temperature in the Central Rift Valley of Ethiopia

Muluneh

Loon²,

Bewket

et al. 2017

For. Ecosyst.

Self Cite

View full text Add to dashboard Cite

show abstract

“…by Coles, ; Katz et al ., ; Coelho et al ., ; Katz, ) are the most commonly used. The threshold approach considers the precipitation total exceeding a defined precipitation threshold value (Štekl, ; Muluneh et al ., ; Tošić et al ., ; Wang et al ., ; Ngo‐Duc et al, ), or a percentile (Wi et al ., ; Allan et al ., ; Wang et al ., ; Yin et al ., ; Blenkinsop et al, ). Although the peaks over a defined percentile may lead to more adequate results because of its capability to reflect microclimates, yet they are based on an empirical distribution.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of extreme precipitation in the Vosges Mountains region (north‐eastern France)

Minářová

Müller

Clappier

et al. 2017

Intl Journal of Climatology

View full text Add to dashboard Cite

In this research, different characteristics (duration, affected area, extremity, and synoptic conditions) related to extreme precipitation events (EPEs), and the trends in frequency of EPEs in the Vosges Mountains (VG) region (north‐eastern France) have been analysed and the events were evaluated on regional scale using the Weather Extremity Index. The index combines three aspects of an EPE – rarity, spatial extent, and duration – and it enables a quantitative comparison of these aspects in a data set of EPEs. In this study, 54 EPEs (which occurred during 1960–2013) were selected using daily precipitation totals from meteorological stations. Although possible maximum duration of an EPE was set to 10 days, all detected EPEs lasted 1–5 days. The prevailing short EPEs (1–2 days) affected smaller areas as compared to long EPEs (3–5 days). Instead of the winter maximum of mean precipitation in the VG, the autumn EPEs prevailed in the data set (40% of all EPEs including the four strongest EPEs). Using the manual and the automated catalogues (Grosswetterlagen and SynopVisGWL, respectively), majority of the 54 EPEs was found associated with the west cyclonic weather type; however, none of the five maximum events was produced by this weather type. The two strongest EPEs were related to the stationary cold front rather than to the expected strong zonal circulation. The EPEs were mostly related to strong southwest airflow and flux of specific humidity. No significant trend was found in frequency of EPEs during the 54 years. Our results highlight new insights into the extreme precipitation in VG region. We believe that the ranking of EPEs according to their extremity in the VG region provides useful information for local decision making authorities, engineers, and risk managers.

show abstract

Duration, rarity, affected area, and weather types associated with extreme precipitation in the Ore Mountains (Erzgebirge) region, Central Europe

Minářová

Müller

Clappier

et al. 2017

Intl Journal of Climatology

View full text Add to dashboard Cite

Extreme precipitation events (EPEs) in the Ore Mountains (OM) were studied based on daily precipitation observations from 1960 to 2013. The OM are a low mountain range situated in the Czech‐German border area. The Weather Extremity Index (WEI) resulting from an event‐adjusted evaluation technique was used to select 54 EPEs of 1‐10 days duration. The WEI combines rarity, spatial extent, and duration of an event in one index and provides quantitative information about its extremity. Based on their duration, the 54 EPEs were classified into short (1‐2 days) and long events (3‐10 days), showing different characteristics and trend behaviour. The EPEs (including the three strongest events) occurred most frequently in late spring and summer. The three strongest EPEs as well as EPEs, which occurred during the winter half‐year (WHY EPEs), affected comparatively larger areas; with WHY EPEs being generally longer. EPE frequency does not show any significant trend during the study period; it fluctuated mostly similar to summer half‐year EPEs. The most frequent weather type (according to two versions of the German Grosswetterlagen concept) related to EPEs was Trough over Central Europe (TrM). Nevertheless, many differences were noticed between the original (manual) catalogue and its automated version (SynopVis‐Grosswetterlagen); the later able to better reflect the weather types associated with 54 EPEs.

show abstract

Searching for evidence of changes in extreme rainfall indices in the Central Rift Valley of Ethiopia

Cited by 30 publications

References 30 publications

Effects of long-term deforestation and remnant forests on rainfall and temperature in the Central Rift Valley of Ethiopia

Effects of long-term deforestation and remnant forests on rainfall and temperature in the Central Rift Valley of Ethiopia

Characteristics of extreme precipitation in the Vosges Mountains region (north‐eastern France)

Duration, rarity, affected area, and weather types associated with extreme precipitation in the Ore Mountains (Erzgebirge) region, Central Europe

Contact Info

Product

Resources

About