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CIFOR-ICRAF s’attaque aux défis et aux opportunités locales tout en apportant des solutions aux problèmes mondiaux concernant les forêts, les paysages, les populations et la planète.

Nous fournissons des preuves et des solutions concrètes pour transformer l’utilisation des terres et la production alimentaire : conserver et restaurer les écosystèmes, répondre aux crises mondiales du climat, de la malnutrition, de la biodiversité et de la désertification. En bref, nous améliorons la vie des populations.

CIFOR–ICRAF publishes over 750 publications every year on agroforestry, forests and climate change, landscape restoration, rights, forest policy and much more – in multiple languages.

CIFOR–ICRAF addresses local challenges and opportunities while providing solutions to global problems for forests, landscapes, people and the planet.

We deliver actionable evidence and solutions to transform how land is used and how food is produced: conserving and restoring ecosystems, responding to the global climate, malnutrition, biodiversity and desertification crises. In short, improving people’s lives.

Climate change in Africa, based on tree rings and stable isotope results, and its potential for climatic tele-connections

Exporter la citation

There is a growing need to develop long-term regional and sub-regional climate data, for proactive adaptation management of climate-change risk. However, in Africa, long-term climate information is still sorely lacking. Tree rings and stable carbon isotopes ( d 13C) have the potential to provide empirical data regarding past climatic events. In this paper, the potential of tree rings and d 13C as proxies for climate reconstructions in Africa is described. High correlations were found between the treering chronologies and precipitation data, which demonstrates their potential to reconstruct precipitation in semi-arid tropics. When strong declines in tree-ring width were compared with past El Niño–Southern Oscillation (ENSO) events and drought/famine periods in Ethiopia, they showed a remarkable relation. Spectral analysis of the master tree ring indicated occurrences of periodic drought events, which fall within the spectral peak equivalent to 2–8 years. A declining trend with time was observed in d 13C series, notably for Balanites aegyptiaca and could be attributed to anthropogenic increases in the concentration of CO2 in the atmosphere. The results demonstrate the potential of tree-ring width and d 13C to understand past and future climate changes
    Année de publication

    2009

    Auteurs

    Gebrekirstos, A.

    Langue

    English

    Mots clés

    climate change, natural isotopes, sustainable development, tree rings

    Géographique

    Ethiopia

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