About: Drought in the Eastern Cape region of South Africa and trends in rainfall characteristics

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type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	Drought in the Eastern Cape region of South Africa and trends in rainfall characteristics
Creator	Blamey, · Hart, · Mahlalela, P Reason, ·
Source	Medline; PMC
abstract	Much of the Eastern Cape province in South Africa has been experiencing a severe drought since 2015. This drought has had major socio-economic effects particularly on the large impoverished rural population as well as on some urban areas where supplied water services have broken down in several cases. The region is influenced by both midlatitude and tropical systems leading to a complex regional meteorology that hitherto has not been much studied compared to other parts of South Africa. Here, the ongoing drought is examined in the context of long-term trends and the interannual rainfall variability of the region. Although the region has experienced drought in all seasons since 2015, focus here is placed on the spring (September–November) which shows the most consistent and robust signal. On average, this season contributes between about 25–35% of the annual rainfall total. Based on CHIRPS data, it is found that this season shows a significant decreasing trend in both rainfall totals as well as the number of rainfall days (but not heavy rainfall days) for spring over most of the province since 1981. On interannual time scales, the results indicate that dry (wet) springs over the Eastern Cape are associated with a cyclonic (anticyclonic) anomaly southeast of South Africa as part of a shift in the zonal wavenumber 3 pattern in the midlatitudes. Over the landmass, a stronger (weaker) Botswana High is also apparent with increased (decreased) subsidence over and near the Eastern Cape which is less (more) favourable for cloud band development and hence reduced (enhanced) rainfall during dry (wet) springs. Analysis of mid-century (2040–2060) CMIP5 rainfall projections suggests that there may be a flattening of the annual cycle over the Eastern Cape with the winter becoming wetter and the summer drier. For the spring season of interest here, the multi-model projections also indicate drying but less pronounced than that projected for the summer.
has issue date	2020-08-14(xsd:dateTime)
bibo:doi	10.1007/s00382-020-05413-0
bibo:pmid	32836893
has license	no-cc
sha1sum (hex)	887c921bad79c1108e0da968940a278f72ebd6ff
schema:url	https://doi.org/10.1007/s00382-020-05413-0
resource representing a document's title	Drought in the Eastern Cape region of South Africa and trends in rainfall characteristics
has PubMed Central identifier	PMC7428292
has PubMed identifier	32836893
schema:publication	Clim Dyn
resource representing a document's body	covid:887c921bad79c1108e0da968940a278f72ebd6ff#body_text
is schema:about of	named entity '2015' named entity 'cloud' named entity 'focus' named entity 'socio-economic' named entity 'drying' named entity '1981' named entity 'EASTERN CAPE PROVINCE' named entity 'REDUCED' named entity 'PROJECTIONS' named entity 'LONG-TERM' named entity 'SUPPLIED' named entity 'BROKEN' named entity 'SIGNIFICANT' named entity 'BAND' named entity 'APPARENT' named entity 'LEADING' named entity 'PROJECTED' named entity 'EXPERIENCED' named entity 'NOVEMBER' named entity 'SEVERE' named entity '2015' named entity 'EFFECTS' named entity 'CONSISTENT' named entity 'drought' named entity 'rural' named entity 'parts' named entity 'drought' named entity 'spring' named entity 'context' named entity 'variability' named entity 'severe' named entity 'anticyclonic' named entity 'Eastern Cape' named entity 'anomaly' named entity 'Eastern Cape' named entity 'Here' named entity 'Eastern Cape' named entity 'drought' named entity 'spring season' named entity 'supplied water' named entity 'South Africa' named entity 'Botswana' named entity 'urban areas' named entity 'Eastern Cape province' named entity 'tropical systems' named entity 'midlatitude' named entity 'South Africa' named entity 'Eastern Cape' named entity 'statistically significant' named entity 'convective systems' named entity 'subtropical' named entity 'RCP8.5' named entity 'SAWS' named entity 'wave number' named entity 'TTTs' named entity 'potential evapotranspiration' named entity 'evolution' named entity 'dam' named entity 'South Africa' named entity 'CMIP5' named entity 'dam' named entity 'South Africa' named entity 'non-parametric' named entity 'Botswana' named entity 'wavenumber' named entity 'coastal zone' named entity 'South Africa' named entity 'anticyclones' named entity 'geopotential height' named entity 'South Africa' named entity 'subtropical' named entity 'South Africa' named entity 'stippling' named entity 'Climate Prediction Center' named entity 'heavy rain' named entity 'southern Africa' named entity 'hPa' named entity 'Port Elizabeth'

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