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Item type:Publication, Medios de vida y estrategias de adaptación basados en la migración por familias afectadas por los deterioros ambientales en comunidades alto andinas «Ya no hay vida aquí; por eso se fueron.»(Pontificia Universidad Católica del Perú. Instituto de Ciencias de la Naturaleza, Territorio y Energías Renovables (INTE-PUCP), 2020-02-07)In Andean communities, many families whose livelihoods depend on farming and raising livestock are exposed to increasing degradation of their ecosystem and to food insecurity. The objective of this paper is to examine the extent to which families use migration strategies, based on multi residence and migratory circulation, to diversity their sources of income and mitigate the consequences of ecological degradation on their living conditions. The results are part of a socio-demographic research conducted in 2015 and 2016, which focused on domestic strategies for addressing environmental problems in a sample of 203 families living in five high Andean communities around Lake Titicaca. Most of families have migrant members and young adults between ages 20 and 35 represent the largest number of them. Nevertheless, their departuredoes not constitute an explicit form of adaptation to the ecological degradation. The quest for better conditions and opportunities in urban territories as well as interests related to their life stage and cycle, are the main determinants of their migration decisions. Despite the ecological problems affecting families, the desire for personal autonomy of the migrants is the main impetus for migration and there is no family organization based on multi residence and circular migration as an explicit livelihood for adaptation to environmental deterioration in rural areas. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The 2022–23 drought in the South American Altiplano: ENSO effects on moisture flux in the western Amazon during the pre-wet season(Elsevier B.V., 2024-09-01)The 2022-23 hydrological year in the Lake Titicaca, Desaguadero River, and Lake Poopó hydrological system (TDPS) over the South American Altiplano constituted a historically dry period. This drought was particularly severe during the pre-wet season (October–December), when the TDPS and the adjacent Andean-Amazon region experienced as much as 60% reductions in rainfall. Consequently, Titicaca Lake water levels decreased by 0.05 m from December to January, which is part of the rising lake level period of normal conditions. Such conditions have not been seen since the El Niño-related drought of 1982-83. Using a set of hydroclimatic, Sea Surface Temperature (SST) and atmospheric reanalysis datasets, we find that this new historical drought was associated with enhanced southerly moisture flux anomalies, reducing the inflow of moisture-laden winds from the Amazon basin to the TDPS. Such anomalies in moisture transport were not seen since at least the 1950s. The atmospheric dynamics associated with this drought are related to La Niña SST anomalies via subtropical teleconnections associated with Rossby wave trains towards South America, further extended by subtropical Atlantic Ocean SST anomalies. This feature reduced the atmospheric moisture inflow from the Amazon and weakened the development of the Bolivian High in the upper troposphere. These results document a new atmospheric mechanism related to extreme droughts in the TDPS associated with La Niña SST anomalies during the pre-wet season. This goes beyond the traditional understanding of El Niño events, especially the strongest ones, being associated with dry conditions in the TDPS during the wet season (December–March).