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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 84 for “"rainfall variability"”.
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Rainfall variability over southern Africa
Southern Africa is subject to high inter annual rainfall variability and the factors influencing southern African rainfall are not fully understood. The variability has been linked with various sea surface temperature anomalies (SSTAs) in each of the three major ocean basins as well as variability …
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Decadal rainfall variability over Southern Africa
… with high seasonal and interannual rainfall variability combined with rain-dependent agriculture. This variability is underpinned by influences from ENSO and other oceanic forcing, and known to exhibit quasi-decadal variability at 16-20 years (Tyson, 1975). This study uses a …
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Rainfall variability characteristics over the East African coast.
This study explores inter-annual rainfall variability over the East African coast region (Kenya and Tanzania) for the period 1980-2010 and focuses on dry and wet spell characteristics during the two rainy seasons. The atmospheric and ocean conditions associated with the rainfall variability are …
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Rainfall variability and change in South Africa (1976-2065)
Rainfall is undoubtedly the most significant factor for life’s continuity. South Africa is prone to future climate uncertainties due to global climate change. The aim of this study is to investigate rainfall variability and change in South Africa on a present day (1976-2005), near-future …
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Latent heat flux and South African summer rainfall variability
… between oceanic latent heat flux and the summer rainfall of South Africa. Such a link would be useful for a better understanding and the prediction of monthly variability in the summer rainfall for South Africa. In order to investigate possible relationships between oceanic latent heat flux and …
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Early summer rainfall variability in the Congo Air Boundary Region
Strong meridional rainfall gradients exist between the tropics and subtropics in southwestern Africa, bounded to the north by the moist Congo basin and the south by the Kalahari Desert. This region termed the tropical-subtropical divide (TSD) here, has recently faced one of the worst droughts in …
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The influence of rainfall variability on savanna tree seedling establishment
My thesis investigates the rainfall requirements necessary for tree seedling survival of different savanna species in the first year of growth. Results from a field drought experiment showed that dry season survival for seedlings of Acacia nigrescens and Philenaptera vialacea was not related to wet …
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Rainfall variability in extratropical cyclones deduced from half-minute rates.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1971.
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The South Indian Convergence Zone and relationship with rainfall variability in Mozambique
… system over southern Africa, and links with rainfall over Mozambique, are analysed. Cluster analysis applied to gridded outgoing long-wave radiation data, were used to identify convective activity related to the tropical temperate troughs that collectively form the SICZ. Intraseasonal and …
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The role of land-atmosphere-ocean interactions in rainfall variability over West Africa
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Inter-seasonal and intra-seasonal rainfall variability in the North West Province South Africa
… study analysed inter-seasonal and intra-seasonal rainfall variability in the North West Province (NWP) South Africa. The observed rainfall data was obtained from South African Weather Service (SAWS) and Agricultural Research Council (ARC).The data used in the analysis covers a period of 31 …
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The impact of rainfall variability on agricultural production and household welfare in rural Malawi
Made available in DSpace on 2012-09-18T21:19:29Z (GMT). No. of bitstreams: 3 Moylan_Heather.pdf: 1073909 bytes, checksum: 9b7b94e2652023b0e78d813f5ae74161 (MD5) license.txt: 4064 bytes, checksum: 88debf52cecb8eebc9c463a6a0992b0e (MD5) Moylan_Heather.docx: 361261 bytes, checksum: …
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Mechanisms of inter-annual rainfall variability over tropical highlands of Africa and its predictability potential
Modes of climate variability over tropical Africa and adjacent Atlantic and Indian Oceans are investigated using continental monthly averages of gridded rainfall and temperature and marine environmental data, which consists of monthly averages of sea surface temperature, sea level pressure and …
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Rainfall variability and availability of water resources in the last 40 years in Western Bahia, Brazil
… analysis showed a significant reduction in rainfall of up to 12% since the 1980s, and a reduction in river flows, both for dry and rainy seasons. Seven sub-regions in Western Bahia were identified with a potential risk of conflicts over water use. These regions experienced a 150-fold …
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Mechanisms of observed spatial heterogeneity in rainfall variability over the winter rainfall zone of South Africa
Renewed interest in South Africa's Winter Rainfall Zone (WRZ) has emerged in the wake of the 2015–2017 “Day Zero” drought and water crisis. However, this has yielded little insight into the spatial heterogeneity in WRZ climatological seasonality and rainfall variability or their drivers, despite …
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Climate change and food security: effects of rainfall variability on sustainable food security in the Sahel of northern Nigeria
This study examines the effects of rainfall variability on sustainable food security in the semi-arid land of Borno State, northeastern Nigeria. The rural population in northeast Nigeria depends on agricultural resources for food security and employment, as about 80% of the population depends on …
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Modelling the influence of rainfall variability and different grazing systems on the spatiotemporal dynamics and productivity of semiarid rangeland
… firstly, to broaden our knowledge about the rainfall-plant-animal system dynamics; and secondly, to re-examine the rotational grazing system with modelling as a substitute to field trials.
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Impact of human land-use and rainfall variability in tropical dry forests of southwest Madagascar during the late Holocene
… response to changes in human land-use and rainfall variability. The aim of this thesis is to understand how and when land-use changed, and rainfall variability impacted the landscape in the southwest region, using dendroclimatological and palaeoecological approaches. Carbon isotopes in the …
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