Rapid climate change in the North Atlantic during the Younger Dryas recorded by deep-sea corals
Article Abstract:
Deep-sea corals from Orphan knoll in the northwestern Atlantic Ocean can be used as a climate archive. Rapid climate changes, such as the Younger Dryas cooling event, are significant to research on global climate change. Previous results from using deep sea corals, as recorders of ambient oceanographic conditions, were ambiguous because the do not usually precipitate in isotopic equilibrium with sea water. Changes in oxygen isotope ratios, however, do indicate significant changes in intermediate water circulation. Shallow water corals are recognized as good environmental recorders, but study of deep water corals could result in a new temperature archive.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Oscillating global temperature
Article Abstract:
M.R. Allen, P.L. Read and L.A. Smith were wrong to claim that a 20-year oscillation in global temperatures is still detectable in the data after the early years' temperatures are left out. Three fallacies undermine their assertion: data showing that the 20-year oscillation can be found even when only 90 years' data are examined; their misleading suggestion that such an oscillation is paradoxical; and their erroneous analysis of the final 110 values of the temperature record. Actually, the available data indicate that a 20-year oscillation is indeed unlikely.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Widespread increases in low-frequency variability of precipitation over the past century
Article Abstract:
The overall mean global precipitation during the 20th century have remained the same, but fluctuations about the mean have significantly increased. A positive trend in precipitation variability shows a pronounced fluctuation for 40-year intervals instead of a gradual increase. This change coincides with the occurrence of global warming. The variation in global precipitation shows a trend toward a greater probability of extremities in precipitations.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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