Volcanic Activity and Climate Dynamics

Volcanic eruptions influence climate through the injection of sulphur dioxide, ash and other aerosols into the troposphere and stratosphere. These particles reflect incoming solar radiation, leading to surface cooling, and can alter atmospheric circulation patterns, monsoon intensity and precipitation regimes. The magnitude, latitude and altitude of an eruption determine aerosol residence time and the spatial distribution of radiative forcing. On annual to decadal timescales, large explosive eruptions can depress global mean temperatures by up to a few degrees, while on centennial timescales clusters of eruptions have contributed to episodes such as the Little Ice Age. High-resolution records from ice cores, tree rings and novel palaeoclimate proxies enable precise dating of past eruptions and quantification of their climatic impacts. Integrating these datasets with climate models helps to disentangle natural variability from anthropogenic trends and improves projections of future climate under scenarios that may include both volcanic and human-driven forcings.

Research from Nature Portfolio

Recent studies have reconstructed stratospheric turbidity during medieval periods using contemporary observations of lunar eclipses and aerosol-climate modeling to refine the timing and impact of key eruptions, distinguishing tropospheric versus stratospheric aerosol veils that governed regional cooling anomalies. Investigations of pre-industrial aerosol deposition in Greenland ice cores have revealed a prolonged episode of elevated sulphur emissions from Icelandic volcanism between 751 and 940 CE, challenging assumptions of volcanic quiescence and highlighting the need to revise forcing estimates in climate models. Analyses of rhyolitic glass shards found in Antarctic ice have provided a precise chronological link to the 1.8 ka Taupō eruption, offering an independent constraint on stratospheric aerosol loading from one of the most energetic Holocene eruptions and improving the synchronisation of global climate records.

Volcanic Activity and Climate Dynamics publication trend

The graph below shows the total number of articles in volcanic activity and climate dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Radiative forcing: Net change in Earth’s energy balance caused by an external perturbation such as volcanic aerosols reflecting solar radiation.

Stratospheric aerosol optical depth (SAOD): Quantitative measure of light extinction by volcanic particles suspended in the stratosphere.

Tephrochronology: Dating of geological and climatic archives by identifying and correlating layers of volcanic ash (tephra).

Sulfur isotope analysis: Examination of isotopic ratios in sulphate to differentiate between tropospheric and stratospheric volcanic signals.

Paleoclimate proxy: Indirect indicator of past climate conditions, such as ice-core chemistry or tree-ring growth patterns, used to reconstruct environmental change.

References

1. Lunar eclipses illuminate timing and climate impact of medieval volcanism. Nature (2023).
2. High sensitivity of summer temperatures to stratospheric sulfur loading from volcanoes in the Northern Hemisphere. Proceedings of the National Academy of Sciences of the United States of America (2023).
3. Decadal-to-centennial increases of volcanic aerosols from Iceland challenge the concept of a Medieval Quiet Period. Communications Earth & Environment (2024).
4. Volcanic glass from the 1.8 ka Taupō eruption (New Zealand) detected in Antarctic ice at ~ 230 CE. Scientific Reports (2023).
5. Volcanic stratospheric sulfur injections and aerosol optical depth during the Holocene (past 11 500 years) from a bipolar ice-core array. Earth System Science Data (2022).