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Landmark Volcano Study Brings to Life Huge Alaska Eruption on its Centennial

By Guest PostMay 27, 2012Environmentair quality, alaska eruption, alaska peninsula, ash, centennial, chronology, fumarole plumes, judy fierstein, katmai national park, kodiak, magnitude, marcia mcnutt, mediterranean sea, molten rock, mount katmai, municipal anchorage, novarupta, novarupta katmai centennial, novarupta volcano, scientific expedition, united states, volcanic complexes, volcanic eruption, volcanic event, volcano, volcanology, wes hildreth

MENLO PARK, Calif. – 100 years ago, in June 1912, the most powerful volcanic eruption of the 20th century took place in what is now Alaska’s Katmai National Park and Preserve. This massive volcanic event once again comes alive for scholars and enthusiasts in a new centennial volume by two U.S. Geological Survey scientists whose work has made major contributions to volcano science.

“The Novarupta-Katmai Eruption of 1912 – Largest Eruption of the Twentieth Century: Centennial Perspectives,” by Wes Hildreth and Judy Fierstein, is the most comprehensive study of a geographically remote but huge and devastating volcanic event. The eruption’s dynamics mystified researchers for decades. Today, study of Novarupta and Katmai volcanoes sheds light on how future events in Alaska’s volcanic regions could affect air quality and air-transportation safety locally and across the globe. (more…)

UA Scientists Find Evidence of Roman Period Megadrought

By Guest PostNovember 6, 2011Environment, Scienceannual growth rings of trees, bristlecone pine tree, chronology, climate, cody routson, colorado river, connie woodhouse, core, dendrochronology, extreme drought conditions, geoscientists, jonathan overpeck, la niña, medieval period, multi decade drought period, primary drainage, rio grande, rocky landscapes of alpine or near alpine mountain slopes, san juan bristlecone pines, san juan drainage, san juan rivers, second century a d, shelley littin, south central colorado, southern san juan mountains, southwestern aridity, southwestern u.s, tree bark, tropical pacific ocean, university of arizona

*A new study at the UA’s Laboratory of Tree-Ring Research has revealed a previously unknown multi-decade drought period in the second century A.D. The findings give evidence that extended periods of aridity have occurred at intervals throughout our past.*

Almost nine hundred years ago, in the mid-12^th century, the southwestern U.S. was in the middle of a multi-decade megadrought. It was the most recent extended period of severe drought known for this region. But it was not the first.

The second century A.D. saw an extended dry period of more than 100 years characterized by a multi-decade drought lasting nearly 50 years, says a new study from scientists at the University of Arizona. (more…)

Tag Archives: chronology

Landmark Volcano Study Brings to Life Huge Alaska Eruption on its Centennial

UA Scientists Find Evidence of Roman Period Megadrought