Global ETD Search
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 18 of 18 for “"Congo Basin"”.
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Impacts of Congo Convection on Tropical Africa's circulation, rainfall and resources
… circulation is examined. The convection over the Congo basin is estimated using satellite OLR (Outgoing Long Wave Radiation) as an index. It is then related to the regional and global circulation. OLR indices for the Congo area 15°-30°E, 10°S-5°N are evaluated for JAS and MAM seasons and …
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The Hydroclimate Variability of Central Africa: seasonal cycle, mechanisms, teleconnections and impacts on neighbouring regions
… with some additional contribution from the Congo basin rainforest. Central Africa rainfall variability is controlled by large-scale circulation variation, rather than variation in tropospheric water vapor. Year-round, the large-scale circulation is characterized by dominant easterly jets at …
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Spatiotemporal Variability of CO2, Solar-Induced Fluorescence, And Precipitation Over the Tropical Rainforests
… atmospheric CO2 sink to a CO2 source. The Amazon basin, Congo basin, and the tropical Indo-Pacific play vital roles in biospheric processes, which contribute to Earth’s atmospheric CO2 concentration. This investigation will use various space-based and ground-based datasets and empirical models to …
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The Effectiveness of Protected Areas in Central Africa: A Remotely Sensed Measure of Deforestation and Access
… loss found by other studies for the entire Congo Basin forest. Based on the rates of deforestation in the entire Congo Basin and the assumption that protected areas are trying to avoid deforestation, this suggests that Central African protected areas may be effective safeguards against …
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STRATIGRAPHIC FRAMEWORK AND QUATERNARY PALEOLIMNOLOGY OF THE LAKE TURKANA RIFT, KENYA
… at least 100 m lower than today, as evidenced by basin-wide, high-amplitude reflections correlated to sand intervals in the sediment cores. Lake level rose abruptly at ~11 ka as interpreted from an increase in organic carbon content and abrupt shift to silt and clay-sized sediment, after which …
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An analysis of heavy rainfall events over the Limpopo River Basin in southern Africa, their moisture sources and pathways
… transport moisture into one of the key river basins in southern Africa, the Limpopo River Basin (LRB). The LRB, located in eastern southern Africa and spanning four countries, has experienced a number of extreme flooding events over the last three decades. Using CHIRPS satellite merged …
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Hidden Histories and Multiple Meanings: The Richard Dennett Collection at the Royal Albert Memorial Museum, Exeter.
… years when European powers began to colonise the Congo basin. Richard Edward Dennett (1857-1921) worked as a trader in the Lower Congo between 1879 and 1902. The collection was accessioned by the RAMM in 1889. The research contextualises the collection by making a close analysis of primary source …
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The evolution of the Congo- Kalahari Watershed: African mega-geomorphology
… in the south and east, is globally unique. The Congo–Kalahari Watershed represents the transition between low and high Africa. This sub–continental drainage divide separates two of the world's large rivers: the Congo and Zambezi Rivers. This study focuses on the large rivers which form the …
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Geographic patterns of speciation in West and Central Africa: The role of rivers, mountains, and refugia
… A major sampling gap exists for many taxa in the Congo Basin, and pollen core and fossil data tend to be poorly preserved in the tropics. In addition, many climatic and geologic events overlap spatially making it difficult to tease apart their combined/confounding effects. This dissertation …
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Adaptive radiation, speciation, and reproductive isolation in African weakly electric fish : (Genus Campylomormyrus, Mormyridae, Teleostei)
… occurring in sympatry near Brazzaville/Kinshasa (Congo Basin). By combining molecular data and EOD analyses, I could show that there are three cryptic species, characterised by their own adult EOD types, hidden under a common juvenile EOD form. In addition, I confirmed that adult male EOD is …
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The Phytochemistry of Selected Ancistrocladus and Monsonia Species and their Anti-Pancreatic Cancer and Nrf2 Activator Properties
… region of the Democratic Republic of the Congo. Most of the isolated alkaloids were S-configured at C-3, and possessed an oxygen function at C-6 in the isoquinoline portion, which is characteristic to the subclass of “Ancistrocladaceae-type” alkaloids. This finding was geo- and …
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A modern history of monetary and financial systems of Congo 1885-1995
… the modern history of money and finance in Congo from 1885 to 1995, against a background of pre-colonial traditional monetary practices observed since the 15th century and still in use today in some regions of the Congo basin within the current Democratic Republic of the Congo. The work …
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Early summer rainfall variability in the Congo Air Boundary Region
… 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 the last 40 years, contributing to local food insecurity. Compared to the rest of …
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Wetlands Characterization in the Congo River Basin Using Multi-source Remotely Sensed Data and Field Survey
… characterization results in the Central African Congo River Basin. Multi-source and multi-resolution remote sensing data are used along with a state-of-the art decision tree classification method to map the wetlands extent in the Democratic Republic of the Congo (DRC). This map is then combined …
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Upper ocean variability and tropical cyclones in the South West Indian Ocean
… Similar to cyclones in other tropical ocean basins, tropical cyclones in the South West Indian Ocean also cause significant social and economic damage in southeastern Africa and Madagascar. To forecast TC intensity more accurately, monitoring upper ocean conditions in the South Indian Ocean …
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Water resources management & hydroclimatic data analysis in transboundary river basins under the influence of climate variability & water abstraction : Nile river basin
… of available water in case of transboundary basins during the subsequentyears. The freshwater availability in the present and the future is governed by twofactors: the effects of climate change or climate variability and the effects of humaninduced factors. The climate change can be sensed …