Isotopic evidence for the source of lead in Greenland snows since the late 1960s
Article Abstract:
The lead pollutants in Greenland snow havedistinct isotopic signatures depending on their origin. The isotopic signaturesof the lead in leaded petrol from the US, Canada and Eurasia were determined and compared to those found in 25 Greenland snow core sections collected duringthe last two decades. The results showed that between 1967 and 1975, the US wasthe most important source of lead pollution. This US contribution decreased after 1976, when leaded gasoline was phased out in the US. Contributions by Canada and Eurasia were less but maintained a constant output.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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One-to-one coupling of glacial climate variability in Greenland and Antarctica
Article Abstract:
A glacial climate record derived from an ice core from Dronning Maud Land, Antarctica, which represents South Atlantic climate at a resolution comparable with the Greenland ice core records, is presented. The amplitude of the Antarctic warm events is found to be linearly dependent on the duration of the concurrent stadial in the North, indicating that they all result from a similar reduction in the meridional overturning circulation.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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Greenland's ice on the scales
Article Abstract:
Satellite measurements of changes in Earth's gravity field have revealed ice loss from Greenland's ice sheet, which, since 2002, has contributed to global sea-level rise at an alarming rate. Two complementary studies aim to show that the Greenland ice sheet lost between 192 million and 258 million tonnes of ice each year between April 2002 and April 2006.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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