5113 to 5124 of 13949 results
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Observations of forced oscillations of the magnetosphere by a geostationary satellite and an extensive ground magnetometer array
Read more of: Observations of forced oscillations of the magnetosphere by a geostationary satellite and an extensive ground magnetometer arrayWe present results from the analysis of magnetometer measurements of one of the clearest observations of a double resonance Pc4 pulsation to date. The Pc4, with a period of 55 […]
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The residence time of Southern Ocean surface waters and the 100,000-year ice age cycle
Read more of: The residence time of Southern Ocean surface waters and the 100,000-year ice age cycleFrom 1.25 million to 700,000 years ago, the ice age cycle deepened and lengthened from 41,000- to 100,000-year periodicity, a transition that remains unexplained. Using surface- and bottom-dwelling foraminifera from […]
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Recent measurements of Antarctic ozone depletion
Read more of: Recent measurements of Antarctic ozone depletionMeasurements of total ozone at Halley Bay, Antarctica, are presented for the six most recent observing seasons, 1980‐86, showing the consistency and progress of the spring ozone depletion. The principal […]
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Emperors on thin ice: three years of breeding failure at Halley Bay
Read more of: Emperors on thin ice: three years of breeding failure at Halley BaySatellite imagery is used to show that the world’s second largest emperor penguin colony, at Halley Bay, has suffered three years of almost total breeding failure. Although, like all emperor […]
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Growth rings in Cretacous and Tertiary wood from Antarctica and their palaeoclimatic implications
Read more of: Growth rings in Cretacous and Tertiary wood from Antarctica and their palaeoclimatic implicationsAlthough the Antarctic Peninsula now has a glacial climate, during the Cretaceous and early Tertiary it was sufficiently warm for forests to thrive, even at palaeolatitudes of 59°-62° S. The […]