As highlighted in AR5, detection of climate change impacts on the fragile environments of small islands is challenging because of other non-climate drivers that affect small islands. Determination of attribution to incremental change of climate drivers is also challenging because of the natural climate variability. Therefore, there is limited scientific literature on observed impacts and attribution. A synthesis of findings on the impacts of climate change  shows that there is more information on impacts on ecosystems compared to human systems. There is high confidence in attribution to climate change of impacts on the coastal and marine as well as terrestrial ecosystems  and medium confidence in attribution to climate change of impacts on livelihoods, economics and health .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report