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Now showing 1 - 5 of 5
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    Restoration of rhythmicity in diffusively coupled dynamical networks
    (London : Nature Publishing Group, 2015) Zou, W.; Senthilkumar, D.V.; Nagao, R.; Kiss, I.Z.; Tang, Y.; Koseska, A.; Duan, J.; Kurths, J.
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    Basin stability in delayed dynamics
    (London : Nature Publishing Group, 2016) Leng, S.; Lin, W.; Kurths, J.
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    An integrative quantifier of multistability in complex systems based on ecological resilience
    (London : Nature Publishing Group, 2015) Mitra, C.; Kurths, J.; Donner, R.V.
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    A random interacting network model for complex networks
    (London : Nature Publishing Group, 2015) Goswami, B.; Shekatkar, S.M.; Rheinwalt, A.; Ambika, G.; Kurths, J.
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    A deforestation-induced tipping point for the South American monsoon system
    (London : Nature Publishing Group, 2017) Boers, N.; Marwan, N.; Barbosa, H.M.J.; Kurths, J.
    The Amazon rainforest has been proposed as a tipping element of the earth system, with the possibility of a dieback of the entire ecosystem due to deforestation only of parts of the rainforest. Possible physical mechanisms behind such a transition are still subject to ongoing debates. Here, we use a specifically designed model to analyse the nonlinear couplings between the Amazon rainforest and the atmospheric moisture transport from the Atlantic to the South American continent. These couplings are associated with a westward cascade of precipitation and evapotranspiration across the Amazon. We investigate impacts of deforestation on the South American monsoonal circulation with particular focus on a previously neglected positive feedback related to condensational latent heating over the rainforest, which strongly enhances atmospheric moisture inflow from the Atlantic. Our results indicate the existence of a tipping point. In our model setup, crossing the tipping point causes precipitation reductions of up to 40% in non-deforested parts of the western Amazon and regions further downstream. The responsible mechanism is the breakdown of the aforementioned feedback, which occurs when deforestation reduces transpiration to a point where the available atmospheric moisture does not suffice anymore to release the latent heat needed to maintain the feedback.