Academic literature on the topic 'Changements climatiques – Afrique du Sud'
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Journal articles on the topic "Changements climatiques – Afrique du Sud"
Allam, Antoine, Jinane El Hassan, Wajdi Najem, Claude Bocquillon, and Roger Moussa. "Classification climatique méditerranéenne pour l'hydrologie." La Houille Blanche, no. 1 (February 2020): 60–69. http://dx.doi.org/10.1051/lhb/2020008.
Full textAbotsi, Komla Elikplim, Kouami Kokou, Germinal Rouhan, and Vincent Deblauwe. "Vulnérabilité des ptéridophytes au changement climatique et implications pour leur conservation au Togo (Afrique de l’Ouest)." Plant Ecology and Evolution 153, no. 1 (March 26, 2020): 22–32. http://dx.doi.org/10.5091/plecevo.2020.1660.
Full textCamara, Clémentine, Robin Bourgeois, and Camille Jahel. "Anticiper l’avenir des territoires agricoles en Afrique de l’Ouest : le cas des Niayes au Sénégal." Cahiers Agricultures 28 (2019): 12. http://dx.doi.org/10.1051/cagri/2019012.
Full textDansou, Dossa Hyppolite, and Mario Carrier. "Vers une gouvernance collaborative comme levier d’adaptation de la population et son cadre de vie aux changements climatiques. Étude comparée de deux communes au Bénin." Canadian Journal of Regional Science 46, no. 2 (May 31, 2023): 19–29. http://dx.doi.org/10.7202/1100211ar.
Full textKouassi, Amani Michel, Relwindé Abdoul-Karim Nassa, Koffi Eugène Kouakou, Koffi Fernand Kouame, and Jean Biemi. "Analyse des impacts des changements climatiques sur les normes hydrologiques en Afrique de l’Ouest : cas du district d’Abidjan (sud de la Côte d’Ivoire)." Revue des sciences de l'eau 32, no. 3 (2019): 207. http://dx.doi.org/10.7202/1067305ar.
Full textBerthaud, Pierre, and Tancrède Voituriez. "L’effet BASIC sur la gouvernance globale du climat : le jeu des préférences et de la puissance." Économie appliquée 65, no. 2 (2012): 77–105. http://dx.doi.org/10.3406/ecoap.2012.3602.
Full textFAYE, Mbagnick, Dome TINE, Souleymane DIALLO, and Oumar Harouna SY. "Analyse De La Pluviométrie Dans Les Rivières Du Sud : Cas De La Basse Casamance (Sénégal) Au Rio Gêba En République De Guinée." International Journal of Progressive Sciences and Technologies 34, no. 1 (September 13, 2022): 154. http://dx.doi.org/10.52155/ijpsat.v34.1.4554.
Full textHessou, Tohouindji Christian, and Kristin Bartenstein. "Le principe des responsabilités communes mais différenciées et les déplacés climatiques en Afrique : un partage du fardeau avec les États riches ?" Les Cahiers de droit 55, no. 1 (June 3, 2014): 289–314. http://dx.doi.org/10.7202/1025506ar.
Full textYEGBEMEY, Rosaine Nérice, Soule El-hadj IMOROU, Dossou Ghislain Boris AÏHOUNTON, Jacob Afouda YABI, Thierry A. KINKPE, and Michel ATCHIKPA. "Déterminants de l’adaptation des agriculteurs aux changements climatiques dans les zones du Nord Bénin et du Sud Niger." Annales de l’Université de Parakou - Série Sciences Naturelles et Agronomie 10, no. 2 (December 31, 2020): 31–42. http://dx.doi.org/10.56109/aup-sna.v10i2.35.
Full textGendreau, Yanick, Audrey Lachance, Marylène Ricard, Hélène Gilbert, Nicolas Casajus, and Dominique Berteaux. "Changements climatiques : défis et perspectives pour les plantes vasculaires en situation précaire au Québec." Botanique 142, no. 1 (November 22, 2017): 16–35. http://dx.doi.org/10.7202/1042011ar.
Full textDissertations / Theses on the topic "Changements climatiques – Afrique du Sud"
Merdaci, Ouassila. "Changements climatiques au cours des 30 derniers mille ans en Afrique sud équatoriale (Tanzanie) par l'étude des pigments et phénols sédimentaires lacustres." Aix-Marseille 3, 1998. http://www.theses.fr/1998AIX30079.
Full textHuntsman-Mapila, Philippa. "Bassins de rift à des stades précoces de leur développement : l'exemple du bassin Makgadikgadi-Okavango-Zambezi, Botswana et du bassin Sud-Tanganyika (Tanzanie et Zambie) : composition géochimique des sédiments : traceurs des changements climatiques et tectoniques." Brest, 2006. https://tel.archives-ouvertes.fr/tel-00161196.
Full textThis thesis presents the results of a multidisciplinary study of sediments, with an emphasis on geochemistry, with the following objectives: I) improve our understanding of geochemical processes occurring as a result of erosion, transport and deposition in two rift basin in their early stage of development; 2) reconstruct environments in these two regions of the rift during the Late Pleistocene and Holocene and 3) define sedimentary and geochemical criteria to allow us to discriminate tectonic setting and climate change in nascent and early stage rift basins. 11e two basins chosen to represent early stage rift development were I) the Makgadikgadi-Okavango-Zambezi basin located in NW Botswana md 2) the Mpulungu Basin, located at the south-western extremity of Lake Tanganyika. The geochemicat study of sediments and water of the Okavango Delta revealed the presence of elevated arsenic in the groundwater occurring as n result of the dissolution of oxides under reducing conditions. The presence of elevated arsenic in the sediments is linked to organic rich clays, deposited under lacustrine conditions during periods of higher rainfall et possible impoundment of the river by die Thamalakane Fault. The geochemical results were used as n proxy for climate change in the Mpulungu basin. The results indicate n remarkable excursion winch coincides with the Younder Dryas event, Tins environmental event appears to be the most important event in southem Lai Tanganyika during the period 23 —3 ka, winch is characterized by the transport of weathered material into die basin due ton change in vegetation cove in the catchment area
Tummon, Fiona. "Les effets directs et semi-directs des aérosols sur le climat régional du sud de l'Afrique pendant la saison d'hiver austral." Phd thesis, Toulouse 3, 2011. http://thesesups.ups-tlse.fr/1341/.
Full textThe regional climate model RegCM3 is used to investigate the direct and semi-direct aerosol effects on the southern African climate during the austral winter season (June-September). The sensitivity of simulated aerosol-climate effects to different biomass burning inventories, boundary conditions and sea surface temperature (SST) feedbacks is tested to assess the range of uncertainty associated with these parameters. Little sensitivity to boundary forcing is found, while the aerosol radiative forcing (RF) varies approximately linearly by up to a factor of two, in response to the factor of two difference between emissions inventories. In all cases the surface RF is negative, while the top-to-atmosphere RF is negative over most of the domain but positive over high-albedo savannah regions where aerosol loading is high. Sensitivity to SST feedbacks is negligible in RegCM3. Although the magnitude of simulated RF varies, all simulations show similar aerosol-climate impacts. Surface temperature decreases over most of the subcontinent, a signal which acts to reduce model bias over the western half of the region. The absorbing nature of the simulated aerosol burden results in heating at altitude, which, in combination with the surface cooling, serves to increase stability in the lower atmosphere over most of the subcontinent. In the middle troposphere, however, this warming induces an elevated heat-pump effect in the equatorial regions between approximately 8°N and 5°S. This enhances convection, precipitation as well as soil moisture, effectively spinning-up the hydrological cycle in the tropics. An investigation of the interannual variability of the simulated aerosol radiative impacts showed that seasonal average precipitation changes varied more from year to year than aerosol-induced surface temperature changes. In contrast, despite significant differences between synoptic conditions, there is little synoptic-scale variability of aerosol-climate impacts
Huntsman-Mapila, Philippa. "Bassins de rift à des stades précoces de leur développement: l'exemple du bassin de Makgadikgadi-Okavango-Zambezi, Botswana et du bassin Sud-Tanganyika (Tanzanie et Zambie). Composition géochimique des sédiments: traçeurs des changements climatiques et tectoniques." Phd thesis, Université de Bretagne occidentale - Brest, 2006. http://tel.archives-ouvertes.fr/tel-00161196.
Full textAsdar, Sarah. "Climate change impact on ecosystems of Prince Edward Islands : role of oceanic mesoscale processes." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0037/document.
Full textThe subantarctic Prince Edward Islands lie in the Antarctic Circumpolar Current, between the Subantarctic Front (SAF) and the Polar Front (PF). These fronts positions were found to be highly variable at interannual and monthly time scales and revealed a significant long-term southward trend in the region. The intense mesoscale activity, observed upstream the islands at the South West Indian Ridge, also showed an interannual and intra-annual variability as well a decrease in eddy kinetic energy over 24 years. At a more local scale, we highlighted that the archipelago’s environment was impacted by the mesoscale features produced upstream.Tides appeared to be another important driver of variability of the circulation in between the two islands.An idealised model configuration was designed for the Prince Edward Islands region to study the mesoscale eddy properties and the physical mechanisms of their formation at the ridge. The Eddy Available Potential Energy revealed a maximum of energy around 800 m depth, confirming the deep reaching characteristic of the eddy originated in the region and suggested the presence of a local energy source at this depth. This eddies activity was shown to be the result of a combination of barotropic and baroclinic instabilities occurring at the ridge.Finally, we investigated on the potential consequences of a southward shift of the SAF in the region of the islands.Because the model was idealised, it allowed us to simulate an SAF southward shift by shifting the initial and boundary conditions. The main result was the clear decrease of mesoscale activity in the region which could potentially impact the ecosystems of the Prince Edward Islands
Kubik, Zaneta. "Weather shocks, migration and food security : evidence from Sub-Saharan Africa." Thesis, Paris 1, 2018. http://www.theses.fr/2018PA01E007/document.
Full textThis thesis contributes to the literature on the impact of weather shocks on migration and food security in Sub-Saharan Africa. The first chapter analyses whether Tanzanian rural households engage in internal migration as a response to weather-related shocks using an iv probit model. The findings confirm that for an average household, a 1 per cent reduction in agricultural income induced by weather shock increases the probability of migration by 13 percentage points on average within the following year. The second chapter paper attempts to establish if weather acts as the determinant of destination choice in the case of rural-to-rural migration. Employing the alternative-specific conditional logit model, this paper shows that an increase in the expected income differentials between origin and destination by 10,000 Tanzanian shillings, attributable to differences in weather, increases the probability of choosing a given destination by 2 percentage points. The third chapter analyses the food access dimension of food security, and models the link between weather shocks and food security that acts specifically through food prices. Employing an instrumental variable model where household dietary diversity is determined by food prices instrumented with weather shock, this chapter shows that a 1 per cent increase in local food prices induced by a weather shock decreases the number of food items consumed by households by around 2.5 per cent
Sakho, Issa. "Evolution et fonctionnement hydro-sédimentaire de la lagune de la Somone, Petite Côte, Sénégal." Rouen, 2011. http://www.theses.fr/2011ROUES036.
Full textLocated at the Petite Côte of Senegal, Somone is a small coastal river that flows into the Atlantic Ocean by a microtidal lagoonal-estuarine ecosystem. Today, the contribution of the watershed is absent due to a combination of several factors including the dam of Bandia. The only freshwater inputs are from precipitation and groundwater. Somone is a lagoonal-estuarine system characterized by an inverse hydrological functioning where marine influences predominate. Mangrove, dominated by Rhizophora, is the main characteristic unit of this coastal system. The diachronic evolution of 60 years shows a significant change for all the morphological units of the ecosystem. The mobility of the sandy spit, which caused the closures of the mouth in 1967-1969 and in 1987, is related to meteorological variations. The regressive surface of mangroves between 1954 and 1989 is the result of the combined effect of these closures of the mouth, drought and traditional uses of mangroves. The restoration of the mangrove is mainly due to reforestation policies administered in the 2000s. The annual and seasonal trend shows that the internal reworking is the main hydro-sedimentary processes. Sedimentation rate of the mud flats is 2 to 3 mm. Year-1. The dynamics of the sandy spit of the Somone plays an important role in the development and quality of internal units, the mangroves in particular. The permanent opening of the mouth allows a twice-daily renewal of water in the lagoon, which is essential for regulating the high salt content. The low content of sediment in total organic carbon, reflect the low organic matter production of the mangrove because it is a young and stunted mangrove. Diagenetic processes are anaerobic and mostly in the top 10 cm of the sediment, on the recent deposit. The contribution of young mangroves, like Somone, in the carbon storage process, is low. The lagoonal-estuarine ecosystem of the Somone is fragile and highly reactive and his evolution is fast and linked to the cumulative effects of natural and anthropogenic factors
Castebrunet, Hélène. "Soufre Atmosphérique et Changements Climatiques : une étude de modélisation pour les moyennes et hautes latitudes Sud." Phd thesis, Université Joseph Fourier (Grenoble), 2007. http://tel.archives-ouvertes.fr/tel-00187947.
Full textCastebrunet, Hélène. "Soufre atmosphérique et changements climatiques : une étude de modélisation pour les moyennes et hautes latitudes sud." Phd thesis, Grenoble 1, 2007. http://www.theses.fr/2007GRE10120.
Full textThe mid and high-southern latitudes are still marginally affected by anthropogenic sulfur emissions and the natural cycle of the atmospheric sulfur may still be observed. Sulfur aerosols are well-known for their radiative impact, and thus interact with climate. Antarctic ice cores provide information on the evolution of climate and sulfur deposition at thei surface of the ice sheet at glacial-interglacial time scales. The aim of this thesis is to develop and use modeling towards a better understanding of the atmospheric sulfur cycle in antarctic and sub-antarctic regions. An Atmospheric Gener l Circulation Model (AGCM) coupled to a sulfur chemistry module is used: the LMD-ZT-Sulfur model, version 4. Th model was first performed (update of both the physical and chemical parts of the model). Further, boundary conditions are adapted to simulate the atmospheric circulation and sulfur cycle at the Last Glacial Maximum, approximately 20,00 years ago. Ln the model, sulfur is found to be highly sensitive to antarctic sea-ice coverage, which is still poorly know* during the ice age. An original dataset of ice-age sea-ice coverage was developed and its impact on the oceanic emissions of dimethyl sulfide, main precursor of sulfur aerosols at high-southern latitudes, is discussed. The model broadly reproduces the glacial deposits of sulfur aerosols on the Antarctic plateau, suggesting little impact of climate on oceanic sulfur production in the Antarctic region. Sensitivity tests were carried out to draw an up-to-date status of major uncertainties and difficulties facing futllre progress in understanding atrnospheric sulfur and clirnate
Doherty, Jean-François. "Phénologie et modèles prévisionnels d'éclosion printanière pour trois arthropodes ravageurs en plantation commerciale d'arbres de Noël dans un contexte de changements climatiques." Master's thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27826.
Full textThe balsam twig aphid Mindarus abietinus and the spruce spider mite Oligonychus ununguis are two pests of economic importance for the Christmas tree industry in Québec. Current climate change could affect their biology and physiology in such a way that, if their local densities in commercial fir plantations grow in the future, potential damage to cultivated firs could increase substantially. In order to study the interactions between M. abietinus, its host tree, and ambient temperature, I followed populations of the aphid during three consecutive summers in commercial fir plantations of southern Québec. I found it possible to separate overlapping generations of different morphs of this aphid in growing colonies on fir shoots, which allowed to record a proportion of wingless daughters several times larger than previously known for this aphid in its complex life cycle. Based on a field experiment, a warmer environment surrounding the aphids on balsam fir shoots increased spring colony growth rates significantly, when compared to unaltered colonies on neighbouring trees. These results support the hypothesis that a warmer climate, caused by anthropogenic change, would promote higher densities of M. abietinus on fir shoots, which could increase esthetic damage to Christmas trees. In a laboratory experiment, I studied the effect of ambient temperature on postdiapause development of the overwintering eggs of both aphid and mite species, along with that of another conifer-feeding pest, the pine needle scale Chionaspis pinifoliae, which led to parametrise new linear and nonlinear development rate models for postdiapause egg development of all three species. Finally, by following fresh mass of M. abietinus overwintering eggs throughout their diapause of several months, it was possible to observe a substantial increase in size and mass of these eggs in early spring, suggesting that water could trigger diapause termination and/or initiate embryogenesis of the first active stage.
Books on the topic "Changements climatiques – Afrique du Sud"
Lallemant-Moe, Hervé Raimana. Assistance environnementale et changements climatiques dans le Pacifique sud. Paris: L'Harmattan, 2016.
Find full textChangements climatiques, dynamiques des milieux et crises de sociétés en Afrique de l'ouest: Bénin, Mali, Sénégal, Togo. Paris: L'Harmattan, 2012.
Find full textÉtude sur l'agriculture pluviale face aux changements climatiques en Afrique du Nord. FAO, 2022. http://dx.doi.org/10.4060/cc0014fr.
Full textSultan, Benjamin, Richard Lalou, Mouftaou Amadou Sanni, Amadou Oumarou, and Mame Arame Soumaré, eds. Les sociétés rurales face aux changements climatiques et environnementaux en Afrique de l’Ouest. IRD Éditions, 2015. http://dx.doi.org/10.4000/books.irdeditions.8914.
Full textClimate Governance In The Developing World. Polity Press, 2013.
Find full textBook chapters on the topic "Changements climatiques – Afrique du Sud"
Kamdem, Emmanuel. "Recherches sur la Sustainability." In Recherches sur la Sustainability, 497–512. EMS Editions, 2023. http://dx.doi.org/10.3917/ems.cheva.2023.01.0497.
Full textSchwartz, Dominique, and Groupe Ecofit. "Changements climatiques holocènes en Afrique centrale." In Peuplements anciens et actuels des forêts tropicales, 157–68. IRD Éditions, 2003. http://dx.doi.org/10.4000/books.irdeditions.1501.
Full textSteytler, Nico. "Afrique du Sud: un compromis négocié." In Dialogues sur les origines, structures et changements constitutionnels dans les pays fédéraux, 7–10. McGill-Queen's University Press, 2005. http://dx.doi.org/10.1515/9780773573093-003.
Full text"Un programme d’action: V) Changements climatiques et VI) Coopération Sud-Sud pour le développement." In Les Pays les Moins Avancés Rapport 2010, 253–90. UN, 2011. http://dx.doi.org/10.18356/07d10fab-fr.
Full textSanfo, Safietou, Seyni Salack, Moise Damba Mboungou, and Inoussa Abdou Saley. "Chapitre 3. Les déterminants de l’utilisation de l’information pluviométrique (nord et sud-ouest du Burkina Faso)." In Risques climatiques et agriculture en Afrique de l’Ouest, 45–54. IRD Éditions, 2020. http://dx.doi.org/10.4000/books.irdeditions.36139.
Full textZattara-Gros, Anne-Françoise. "Exploitation de l’énergie des mers et adaptation aux changements climatiques dans la zone sud-ouest de l’océan Indien." In Quel droit pour l’adaptation des territoires aux changements climatiques ?, 99–117. DICE Éditions, 2018. http://dx.doi.org/10.4000/books.dice.4052.
Full textSivan, Olivier, and Cécile Miramont. "13. L’évolution des paysages face aux changements climatiques depuis la dernière glaciation dans les Alpes du Sud. Quels impacts sur les sociétés ?" In Des climats et des hommes, 221–36. La Découverte, 2012. http://dx.doi.org/10.3917/dec.berge.2012.01.0221.
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