Researchers have identified Zavaritsky volcano in the Pacific as the source of the massive 1831 eruption that cooled global temperatures by 1°C and turned the sun blue. The discovery connects sulfur deposits in polar ice cores to a previously overlooked volcanic event.
The eruption, which occurred on Simushir Island in the Kuril Islands, injected approximately 13 teragrams of sulfur dioxide into the stratosphere, causing severe weather anomalies, crop failures, and famines in India and Japan. Advanced analysis of polar ice cores and ash samples provided a definitive chemical match, solving a 200-year-old mystery.
The study used advanced techniques to examine sulfur isotopes and cryptotephra, allowing researchers to accurately date and analyze the ash’s origin. The findings have significant implications for modern science and preparedness, highlighting the need for improved monitoring of volcanic eruptions in remote regions.
Zavaritsky volcano, located near Kamchatka, has a history of eruptive activity dating back to 850 BCE. However, its remote location and sparse historical records made it difficult to detect until now. The study aims to map the distribution of Zav-1 tephra and conduct melt inclusion analysis to estimate pre-eruptive magma composition.
As scientists, we need to consider how to coordinate an international response when the next large eruption occurs, Dr. William Hutchison concluded. The discovery underscores the importance of continued research into volcanic eruptions and their impact on global climate.
Source: https://watchers.news/epicenter/zavaritsky-volcano-identified-as-source-of-1831-climate-changing-eruption-and-blue-sun-reports