This thesis examines spatial mobility in relation to livelihood portfolios and capital assets among rural households during the 2010-2013 drought in semi-arid Northeast Brazil. Spatial mobility is a strategy adopted by rural households to respond to the impacts of climatic events in marginal regions around the globe. Permanent and seasonal forms of migration have been widely documented in the African Sahel and in Southeast Asia, but less attention has been given to South America. Moreover, little consideration has been given to the way climatic events impact on local forms of temporary mobility, including diurnal activity patterns and circular mobility.The distinctive socioeconomic and physical context of Northeast Brazil provides a unique setting to explore these relationships. On the one hand, the settlement pattern provides greater spatial choice. On the other hand, a robust welfare system reduces vulnerability to external stressors such as climatic events. At the same time, semi-arid Northeast Brazil suffers from cyclical droughts, including an intense and prolonged drought for the majority of 2010-2013. Such slow-onset climatic events represent a major threat to marginal communities relying on rain-fed agricultural systems. This study presents an empirical account of the impacts of the recent drought on spatial mobility and livelihood strategies in three rural localities in the State of Ceará. The methodology is multifaceted including, analysis of aggregate regional data on migration and climate, a survey of rural households, key-informant interviews, and the application of a new toolkit designed to capture the spacetime signature of local circulation patterns. Nested within a regional case-study, these data were complemented by a macro approach which examines the broad socioeconomic and climatological context of the region. A robust conceptual model was developed to guide the research, situating household livelihood strategies in a framework defined by access to five broad groups of assets, within the wider socioeconomic and physical context, and tracing changes in the spatiotemporal dimensions of mobility resulting from the drought. At the aggregate level, the study uses census data and indirect estimates to link population dynamics to climatic events in the Northeast Region and in the State of Ceará. At the micro level, the study couples an intensive survey with field observation to examine household access to five forms of capital which mediate livelihood strategies among smallholder farmers. Analysis revealed four distinctive types of households, which differed in asset endowment and livelihood strategies:welfare-dependent, mixed livelihood, non-farming and commercial livestock-oriented.ii Differences between the four types were reflected in the way they were impacted by climatic events, and in the strategies employed to respond to the hardship.The study also sought to compare household perceptions of changes in the local climate against scientific climatological data. Respondents showed clear ...