Some of the surviving pieces of the Chelyabinsk meteor (or bolide) fell to the ground near Chebarkul, Russia. But the explosion also injected hundreds of tons of dust into the stratosphere, allowing a NASA-NOAA satellite to make unprecedented measurements of a thin but cohesive and persistent dust belt.
“We wanted to know if our satellite could detect the meteor dust,” said Nick Gorkavyi, an atmospheric physicist at NASA’s Goddard Space Flight Center who grew up in Chelyabinsk. “Indeed, we saw the formation of a new dust belt in Earth's stratosphere, and achieved the first space-based observation of the long-term evolution of a bolide plume.”
About 3.5 hours after the meteor explosion, the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite flew over the area and detected a plume high in the atmosphere, as shown in the image above. The limb profiler instrument in the Ozone Mapping Profiling Suite (OMPS) sensed a mass of aerosols at an altitude of 40 kilometers (25 miles) and moving east at more than 300 kilometers (190 miles) per hour. The cross-section above shows the level of aerosol extinction, or how much the dust and debris blocked sunlight.
On February 16, 2013, OMPS detected the plume continuing its eastward flow and reaching the Aleutian Islands. Larger, heavier particles began to lose altitude and speed, while their smaller, lighter counterparts stayed aloft and retained speed—consistent with wind speed variations at the different altitudes. By February 19, the faster, higher portion of the plume had snaked its way entirely around the northern hemisphere and back to Chelyabinsk.
Building on these initial, direct measurements, Gorkavyi and colleagues combined their data with a series of atmospheric models to simulate how the plume from the explosion would evolve as the stratospheric jet stream carried it around the Northern Hemisphere. The model simulations agreed with the observed evolution of the plume. And indeed the plume’s evolution continued: at least three months later, a detectable belt of meteor dust was still swirling around the planet, according to OMPS measurements.
To view an animation of the meteor-dust model, visit the NASA homepage.
- Suomi NPP - OMPP
NASA: Russia - Tracking the Chelyabinsk Meteor Plume - 08.28.13
Ricardo M Marcenaro - Facebook
Blogs in operation of The Solitary Dog:
Solitary Dog Sculptor:
Solitary Dog Sculptor I:
My blogs are an open house to all cultures, religions and countries. Be a follower if you like it, with this action you are building a new culture of tolerance, open mind and heart for peace, love and human respect. Thanks :)
Mis blogs son una casa abierta a todas las culturas, religiones y países. Se un seguidor si quieres, con esta acción usted está construyendo una nueva cultura de la tolerancia, la mente y el corazón abiertos para la paz, el amor y el respeto humano. Gracias:)