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Reply to comments by S. B. Feldstein and W. A. Robinson on ‘Spatial structure of ultra‐low frequency variability of the flow in a simple atmospheric circulation model’ (October 1992, 118, 1211–1233)
Author(s) -
James I. N.,
James P. M.
Publication year - 1994
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49712051715
Subject(s) - angular momentum , turbulence , simple (philosophy) , climatology , physics , momentum (technical analysis) , flow (mathematics) , atmospheric circulation , meteorology , circulation (fluid dynamics) , atmospheric dynamics , atmospheric sciences , statistical physics , computational physics , geology , mechanics , classical mechanics , philosophy , atmosphere (unit) , economics , epistemology , finance
The note by Feldstein and Robinson (hereafter referred to as FR) raises two questions. The first is whether the EOF1 of zonal wind in the numerical integrations that we carried out is correlated with the atmospheric angular velocity or with the mean angular momentum. The second is whether the ultra‐low‐frequency fluctuations which we observed have any dynamical significance or are merely ‘climate noise’. We reply to each of these issues in turn, and are grateful to FR for raising some interesting questions about our results.