Sentences with phrase «asteroid impact effects»
«We realized that no study had previously been performed which directly compared the various asteroid impact effects in terms of how harmful they are for human populations,» Clemens Rumpf, lead author of the study, told Digital Trends.
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A new reconstruction of Antarctic ocean temperatures around the time the dinosaurs disappeared 66 million years ago supports the idea that one of the planet's biggest mass extinctions was due to the combined effects of volcanic eruptions and an asteroid impact.
«This is the strongest evidence from fossils that the main driver of this extinction event was the after - effects of a huge asteroid impact, rather than a slower decline caused by natural changes to the climate or by severe volcanism stressing global environments.»
While researchers estimate accretion during late bombardment contributed less than one percent of Earth's present - day mass, giant asteroid impacts still had a profound effect on the geological evolution of early Earth.
The study explored seven effects associated with asteroid impacts — heat, pressure shock waves, flying debris, tsunamis, wind blasts, seismic shaking and cratering — and estimated their lethality for varying sizes.
«This is the first study that looks at all seven impact effects generated by hazardous asteroids and estimates which are, in terms of human loss, most severe,» said Clemens Rumpf, a senior research assistant at the University of Southampton in the United Kingdom, and lead author of the new study published in Geophysical Research Letters, a journal of the American Geophysical Union.
The cratering record on the moon provides a proxy for similar impacts by interplanetary debris such as comets and asteroids on Earth, the effects of which have largely been erased by billions of years of erosion and geologic activity.
Scientists have made various proposals to induce a greenhouse effect on Mars through the use of mirrors, atmosphere factories or asteroid impacts.
Volcanic eruptions and impacts from celestial bodies, like asteroids, have a near instantaneous effect, but very few of these one - time events are of sufficient size to impact the global climate for more than a few years.
The idea is that runaway greenhouse effects derived from the (end - Permian) eruption of the Siberian Traps and the (end - Cretaceous) asteroid impact and / or eruption of the Deccan Traps contributed to these extinctions which evidently did remove > 50 % of species.
In the case of both asteroid impact prevention and reduction of CO2 emissions, there are vast positive ancillary effects: leaps in scientific knowledge in the first, cleaning up the ecosphere in the second.
These previous mass extinction events (also known as the «Big Five») are hypothesised to have been caused by combinations of key events such as unusual climate change, changes in atmospheric composition, and abnormally high stress on the ecosystem (except in the case of the Cretaceous, which was caused by an asteroid impact and subsequent effects).