Increased polar stratospheric ozone losses and delayed eventual recovery owing to increasing greenhouse-gas concentrations
Article Abstract:
Increasing greenhouse gases could cause serious ozone depletion over the Arctic, as well as making the severity and duration of the Antarctic ozone hole worse, according to research into the links between projected future emissions of greenhouse gases and levels of ozone-depleting halogen species. It has been established that Arctic ozone loss is very sensitive to a fall in the frequency of sudden stratospheric warmings. This is in alignment with earlier research showing that the presence or absence of mid-winter sudden stratospheric warming is a key element in determining whether an Arctic ozone hole will arise under doubled-carbon dioxide conditions.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Possible role of dust-induced regional warming in abrupt climate change during the last glacial period
Article Abstract:
High glacial dust loading, rather than tropospheric aerosols, may have been responsible for regional warming and abrupt changes in climate during the last glacial period. Sudden changes in dust loading was related to the Dansgaard-Oeschger and Heinrich climate events, and glacial termination. High glacial dust loading may have been responsible for the episodic regional warming of over five degree celsius of the Asian and ice-margin dust sources. Regions close to the oceans are less warm due to the local cooling induced by the sea salts and marine sulphate aerosols.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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An uplifting experience
Article Abstract:
The possible relationship between the rise of the Himalaya and other great mountain ranges and climatic changes at the end of the Tertiary Period was the subject of a mini-conference held at Lamont Doherty Geological Observatory, Nov 9-10, 1992. That the uplift of the mountains brought on the fall in temperatures which in turn triggered the glacial climate cycle to begin about 2.5 millon years ago has not been proven. Moreover, the uplift appears to have been a gradual rather than a sudden process. Further research on Tertiary carbon dioxide levels is needed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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