Nature Climate Change, Published online: 31 March 2020; doi:10.1038/s41558-020-0737-9 Climate change and other human activities are decreasing ocean oxygen content. This Perspective considers the limited data on effects to coral reefs, including oxygen thresholds for lethal and sub-lethal effects in coral reef taxa, and proposes key research questions to address this critical issue.
Nature Climate Change, Published online: 31 March 2020; doi:10.1038/s41558-020-0738-8 In order to limit warming and the most severe consequences of climate change, net global carbon emissions must reach zero by 2050. Many ecosystems contain carbon that would be irrecoverable on this timescale if lost and must be protected to meet climate goals.
Nature Climate Change, Published online: 30 March 2020; doi:10.1038/s41558-020-0736-x Future Arctic methane emissions depend partly on interactions between soil carbon released during permafrost thaw and microbial physiology. Now, a model shows potential increased methane produced from thawing permafrost carbon could be offset by increased consumption by upland methanotrophs.
Nature Climate Change, Published online: 30 March 2020; doi:10.1038/s41558-020-0734-z Models overestimate Arctic methane emissions compared to observations. Incorporating microbial dynamics into biogeochemistry models helps reconcile this discrepancy; high-affinity methanotrophs are an important part of the Arctic methane budget and double previous estimates of methane sinks.
Nature Climate Change, Published online: 30 March 2020; doi:10.1038/s41558-020-0731-2 Climate change detection is confounded by internal variability, but recent initial-condition large ensembles (LEs) have begun addressing this issue. This Perspective discusses the value of multi-model LEs, the challenges of providing them and their role in future climate change research.