You are browsing the archive for 2012 Chapman - Volcanism & atmosphere Archives - GeoSpace.
15 June 2012
Massive volcanic eruptions that spew sulfur-rich particles into the atmosphere can disrupt climate around the globe, leading to cooler temperatures worldwide. Researchers can track the impacts by looking at ice cores or tree rings that record summer growth, but a different approach involves scouring through historical records to see what kind of an impact these volcanic explosions had on everyday life.
Three years ago, icebergs floated at the base of this glacier, in the milky water of a glacial lagoon. But in May 2010, Eyjafjallajökull erupted forcefully beneath Gígjökull, causing torrents of melted water called jökulhlaups to surge down the valley and into the lagoon, carrying with them enough boulders and debris fill it up, displacing all the water.
14 June 2012
Scientists are working to understand how explosive volcanic eruptions – and potential geoengineering efforts – would affect rain worldwide. And climate models might be underestimating how much precipitation decreases after eruptions.
13 June 2012
Þingvellir, Iceland – There aren’t many places in the world where you can walk along a “mid-ocean ridge” and still keep your feet dry. But here the separation of two vast slabs of Earth’s crust—a slow-moving drama usually hidden far below the ocean waves at the bottom of the sea—takes place in plain view.
12 June 2012
When Iceland’s Grímsvötn volcano erupted in May 2011, ejecting 0.7 cubic kilometers (0.2 cubic miles) of ash far up into the atmosphere, most of the material headed north to the pole. Computer models predicted the path of the plume, satellites beamed back images, but one researcher turned to a low-tech and inexpensive method of tracking the ash fall – cellophane sticky tape.
GeoSpace is in Selfoss, Iceland this week, reporting from AGU’s Chapman Conference on Volcanism and the Atmosphere. Check back for posts on the science presented at the meeting, as well as field trips to nearby volcanoes and geologic features. Selfoss, Iceland — The awesome sight of explosive volcanic eruptions occasionally includes a light show as well. Lightning can be sparked throughout the eruption – as the ash, rocks and gases …
11 June 2012
Iceland is undertaking Europe’s largest reclamation project to replant birch and willows, especially in volcanically active areas, to help reduce erosion and improve the island’s ecological health.
A modern recurrence of an extraordinary type of volcanic eruption in Iceland could inject large quantities of hazardous gases into North Atlantic and European flight corridors, potentially for months at a time, a new study suggests. Using computer simulations, researchers are investigating the likely atmospheric effects if a “flood lava” eruption took place in Iceland today.