CLIMATE CHANGE AND HUMAN MOBILITY Quantitative evidence on global historical trends and future projections The opinions expressed in this report are those of the authors and do not necessarily reflect the views of the International Organization for Migration (IOM) or the IOM Member States. [...] The compilation and curation of large quantitative datasets of internal and international mobility (De Sherbinin et al., 2015; Alessandrini, Ghio, and Migali, 2020; Abel and Cohen, 2022; Rees et al., 2017) have played a critical and lasting role in the rapid increase in the number of models (Ramos, 2016). [...] The random forest approach allowed them to rank the relative importance of the various drivers of migration in different parts of the world, revealing the complex and spatially heterogeneous interplay of socio-economic and environmental factors in driving migration (Figure 4). [...] The number of migrants uncertainties in the outputs of several attributed to climate change was then alternative climate models included in the defined as the difference between the analysis. [...] By the end of the Climate change is projected to century (2068–2100), very large parts of significantly increase the intensity and the globe are projected to experience an frequency of heat waves across large extreme heat wave at least once every parts of the world.
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