Volcanic Signature (IMAGE) Columbia Climate School Caption Researchers have come up with a reliable new statistical method to spot past volcanic eruptions. Here, a typical temperature decline caused by particles and aerosols sent into the atmosphere. Credit Pretis et al., <i>Journal of Economic Surveys</i>, 2016 Usage Restrictions Credit must be given. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.