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Zoology and wildlife conservation

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Volcanic winter and accelerated glaciation following the Toba super-eruption

Article Abstract:

The enormous volume of volcanic ash and gas that the eruption of Toba on Sumatra produced 73,500 years ago probably hastened the global trend toward a glacial climate. Model calculations show that the injection of the volcanic material into the atmosphere caused a 'volcanic winter' marked by higher yearly snowfalls and more extensive sea-ice in the northern latitudes, conditions which would have speeded up the growth of glaciers. A climate-volcano feedback process may have been involved since the increasingly colder climate may have helped triggered Toba's eruption.

Author: Rampino, Michael R., Self, Stephen
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
Indonesia

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Explosive start to last ice age

Article Abstract:

The atmospheric cooling that led to the last ice age was probably helped along by the gigantic eruption of the Toba volcano in the Indian Ocean 73,500 years ago. Michael R. Rampino and Stephen Self analysed oxygen isotope records and other paleoclimatic data and found that the enormous volume of aerosols that Toba shot into the stratosphere shielded the Earth from solar radiation and so furthered the shift toward a glacial climate that had started earlier.

Author: Ramaswamy, V.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
Indian Ocean

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Fingerprint of ozone depletion in the spatial and temporal pattern of recent lower-stratospheric cooling

Article Abstract:

Man-made halocarbon chemical-emission-related ozone-depletion, and its spatial and temporal fingerprint on global lower-stratospheric temperatures influence the stratospheric climate. Simulated latitudinal patterns of lower-stratospheric cooling for a specific month through the decade reveals similar decadal temperature changes. The decrease in greenhouse gas concentration suggests human influence on temperature change patterns in the lower stratosphere.

Author: Ramaswamy, V., Schwarzkopf, M.D., Randel, W.J.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
Environmental aspects, Observations, Ozone layer depletion, Stratosphere, Atmospheric temperature

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Subjects list: Research, Weather, Volcanoes, Volcanism, Glacial climates
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