What is climate evidence synthesis, and why does Africa need it?

Climate evidence synthesis is the practice of bringing together existing studies, datasets, and forms of knowledge to answer a question that no single study can answer alone. Instead of launching another round of primary data collection, synthesis researchers ask what the accumulated body of evidence already says, how confident we can be in it, and what it means for a specific decision.

Why synthesis, and why now

Africa has a wealth of climate, health, ecological, and social data. Universities, national statistics agencies, meteorological services, health ministries, conservation authorities, and community organisations have all generated valuable records over decades. The problem is not scarcity. The problem is fragmentation: data sits in different institutions, formats, and languages, collected for different purposes, and rarely integrated.

The cost of that fragmentation is measured in decisions not made. A ministry of education deciding which schools to retrofit first, a municipality planning for heatwaves, or a maritime authority zoning a coastline all need integrated evidence at a resolution that matches their mandate. Fragmented data cannot deliver that, even when every individual dataset is sound.

What synthesis looks like in practice

Synthesis takes several forms. Systematic reviews and meta-analyses appraise every relevant study on a question, such as which adaptation interventions reduce heat-related illness. Data integration links previously separate datasets, for example matching climate model projections against school attendance records or hospital service continuity logs. Knowledge synthesis brings together scientific evidence and the observations of people who live with climate risk daily.

In each case the output is designed for use: a vulnerability map at district resolution, a toolkit a planner can apply next quarter, or a policy brief written for a negotiating team rather than a journal.

The equity argument

Historically, climate research on Africa has often been led from institutions outside the region. That shapes which questions get asked, which datasets are considered credible, and who is positioned to act on the findings. Synthesis is a powerful lever for changing this, because it puts value on evidence that already exists in African institutions and on the expertise required to interpret it in context.

When African and Global South researchers, policymakers, and practitioners lead synthesis teams, the resulting evidence answers locally relevant questions and lands in the hands of people with authority to implement it.

How ASCEND works

ASCEND hosts transdisciplinary synthesis teams that pair researchers with decision-makers from the outset. We absorb the administrative and logistical burden, fund in-person intensive meetings in Cape Town, and provide computing infrastructure and custom AI tools built for evidence synthesis. Teams stay focused on the analytical and translational work.

If you are a researcher, policymaker, or practitioner with a synthesis question that could change decisions, our open calls and postdoctoral fellowships are the place to start.