کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1897487 | 1044541 | 2010 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New nonlinear mechanisms of midlatitude atmospheric low-frequency variability
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
ریاضیات کاربردی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The observed attractors exhibit spatial and temporal low-frequency patterns comparing well with those observed in the atmosphere. For h0â¤800m the periodic orbits have a period of about 10 days and patterns in the vorticity field propagate eastward. For h0â¥800m, the period is longer (30-60 days) and patterns in the vorticity field are non-propagating. The dynamics on the strange attractors are associated with low-frequency variability: the vorticity fields show weakening and strengthening of non-propagating planetary waves on time scales of 10-200 days. The spatio-temporal characteristics are “inherited” (by intermittency) from the two families of periodic orbits and are detected in a relatively large region of the parameter plane. This scenario provides a characterisation of low-frequency variability in terms of intermittency due to bifurcations of waves.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica D: Nonlinear Phenomena - Volume 239, Issue 10, 15 May 2010, Pages 702-718
Journal: Physica D: Nonlinear Phenomena - Volume 239, Issue 10, 15 May 2010, Pages 702-718
نویسندگان
A.E. Sterk, R. Vitolo, H.W. Broer, C. Simó, H.A. Dijkstra,