The Brazilian Research Network on Global Climate Change (Rede CLIMA) is an interdisciplinary network composed of 16 research groups, which interact in different levels and programs. This work aims at building climate change cause–effect research from a ‘Nexus+’ perspective, considering the added value of flexibility and adaptability of the concept. The article draws on the Nexus literature alongside a case study in São Francisco River Basin, Northeast Brazil. An additional pillar to the Nexus approach is proposed here, the socio-ecological security, which can be defined as a political-territorial dimension of coupled social and ecological systems. A collaborative research-practice frame was applied to the study region, a hotspot of climate vulnerability in Brazil. Our results highlight the need for this fourth component to address socio-ecological sustainability into context.

巴西全球气候变化研究网络（Rede CLIMA）是一个跨学科的网络，由16个研究小组组成，这些研究小组在不同的层次和项目中相互作用。这项工作旨在从“ Nexus +”的角度构建气候变化因果关系研究，同时考虑该概念的灵活性和适应性的附加值。本文借鉴了Nexus文献以及巴西东北部圣弗朗西斯科河流域的案例研究。此处提出了Nexus方法的另一个支柱，即社会生态安全，它可以定义为社会与生态系统耦合的政治领土范围。研究区域采用了合作研究实践框架，该研究区域是巴西气候脆弱性的一个热点。