Long-term Atmospheric River History in California
Atmospheric rivers (ARs) are associated with some of the largest flood-producing extreme precipitation events in western North America. As the primary storm mechanism in California, the difference of a few large AR storms in a year dramatically changes precipitation totals and drives the state towards water abundance or drought. Current records of AR activity are limited to just 70 years of instrumental data. So, the key question motivating this work was: what is the long-term history of AR storms in California? We can get insight into past extreme precipitation by looking to the sediment record. Under the right circumstances, clues to
A brief history of YVO webcams
Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Michael Poland, geophysicist with the U.S. Geological Survey and Scientist-in-Charge of the Yellowstone Volcano Observatory, and Jake Lowenstern, Director of the USGS Volcano Disaster Assistance Program and former Scientist-in-Charge of the Yellowstone Volcano Observatory. Map of earthquakes that occurred beneath Yellowstone Lake as parts of seismic swarms in 2008-2009 (green) and 2020 (red). Orange line is the boundary of Yellowstone Caldera, which formed 631,000 years ago. For over 20 years, webcams have provided critical volcano monitoring data around