کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5374995 1504283 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extension of stochastic resonance in the dynamics of ice ages
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Extension of stochastic resonance in the dynamics of ice ages
چکیده انگلیسی

Understanding the dynamics of ice ages has been a major challenge in climate research for more than a century. The cycles are thus attributed to the climatic response of the orbital changes in the incoming solar radiation to the Earth. However, these changes in the forcing are too small to explain the observed climate variations as simple linear responses, thus non-linear amplifications of the orbital forcing are necessary to account for the glacial cycles. Stochastic resonance was proposed by Benzi et al. [1] to describe this scenario. However, there are several shortcomings in the description of the glacial cycles as a simple stochastic resonance. In order to account for the non-periodic nature of the ice age cycles, especially the shift 1 million years ago from 41-kyr ice age cycles to the present approximately 100-kyr ice age cycles, a non-trivial extension of the notion of a stochastic resonance is needed.

The ice age dynamics have existed in two modes of operation, the 41-kyr periods until 1 million years ago and the approximately 100-kyr periods of the present state. These correspond to two different stability diagrams, where the approximate periodicity of the latter period could be due to a generalized stochastic resonance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 375, Issues 2–3, 5 October 2010, Pages 403-409
نویسندگان
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