An Orbitally Driven Tropical Source for Abrupt Climate Change*
نویسندگان
چکیده
منابع مشابه
An orbitally driven tropical source for abrupt climate change
Paleoclimatic data is increasingly showing that abrupt change is present in wide regions of the globe. Here we present a mechanism for abrupt climate change with global implications. Results from a tropical coupled ocean-atmosphere model show that under certain orbital con gurations of the past, variability associated with El Ni~ no/Southern Oscillation (ENSO) physics can abruptly lock to the s...
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Hypotheses and inferences concerning the nature of abrupt climate change, exemplified by the Dansgaard–Oeschger (D–O) events, are reviewed. There is little concrete evidence that these events are more than a regional Greenland phenomenon. The partial coherence of ice core yO and CH4 is a possible exception. Claims, however, of D–O presence in most remote locations cannot be distinguished from t...
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Large, abrupt, and widespread climate changes with major impacts have occurred repeatedly in the past, when the Earth system was forced across thresholds. Although abrupt climate changes can occur for many reasons, it is conceivable that human forcing of climate change is increasing the probability of large, abrupt events. Were such an event to recur, the economic and ecological impacts could b...
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First, we review the evidence that abrupt climate changes have occurred in the past and then demonstrate that climate models have developing capacity to simulate many of these changes. In particular, the processes by which changes in the ocean circulation drive abrupt changes appear to be captured by climate models to a degree that is encouraging. The evidence that past changes in the ocean hav...
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The US National Research Council defines abrupt climate change as a change of state that is sufficiently rapid and sufficiently widespread in its effects that economies are unprepared or incapable of adapting. This may be too restrictive a definition, but abrupt climate change does have implications for the choice between the main response options: mitigation (which reduces the risks of climate...
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ژورنال
عنوان ژورنال: Journal of Climate
سال: 2001
ISSN: 0894-8755,1520-0442
DOI: 10.1175/1520-0442(2001)014<2369:aodtsf>2.0.co;2