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The text of the Persian poet Rum - - ?, written some eight
centuries ago, and reproduced at the beginning of this book is
still relevant to many of our pursuits of knowledge, not least of
turbulence. The text illustrates the inability people have in
seeing the whole thing, the 'big picture'. Everybody looks into the
problem from his/her vi- point, and that leads to disagreement and
controversy. If we could see the whole thing, our understanding
would become complete and there would be no cont- versy. The
turbulent motion of the atmosphere and oceans, at the heart of the
observed general circulation, is undoubtedly very complex and
dif?cult to understand in its entirety. Even 'bare' turbulence,
without rotation and strati?cation whose effects are paramount in
the atmosphere and oceans, still poses great fundamental ch- lenges
for understanding after a century of research. Rotating strati?ed
turbulence is a relatively new research topic. It is also far
richer, exhibiting a host of distinct wave types interacting in a
complicated and often subtle way with long-lived - herent
structures such as jets or currents and vortices. All of this is
tied together by basic ?uid-dynamical nonlinearity, and this gives
rise to a multitude of phen- ena: spontaneous wave emission,
wave-induced transport, both direct and inverse energy scale
cascades, lateral and vertical anisotropy, fronts and transport
barriers, anomalous transport in coherent vortices, and a very wide
range of dynamical and thermodynamical instabilities.
The text of the Persian poet Rum - - ?, written some eight
centuries ago, and reproduced at the beginning of this book is
still relevant to many of our pursuits of knowledge, not least of
turbulence. The text illustrates the inability people have in
seeing the whole thing, the 'big picture'. Everybody looks into the
problem from his/her vi- point, and that leads to disagreement and
controversy. If we could see the whole thing, our understanding
would become complete and there would be no cont- versy. The
turbulent motion of the atmosphere and oceans, at the heart of the
observed general circulation, is undoubtedly very complex and
dif?cult to understand in its entirety. Even 'bare' turbulence,
without rotation and strati?cation whose effects are paramount in
the atmosphere and oceans, still poses great fundamental ch- lenges
for understanding after a century of research. Rotating strati?ed
turbulence is a relatively new research topic. It is also far
richer, exhibiting a host of distinct wave types interacting in a
complicated and often subtle way with long-lived - herent
structures such as jets or currents and vortices. All of this is
tied together by basic ?uid-dynamical nonlinearity, and this gives
rise to a multitude of phen- ena: spontaneous wave emission,
wave-induced transport, both direct and inverse energy scale
cascades, lateral and vertical anisotropy, fronts and transport
barriers, anomalous transport in coherent vortices, and a very wide
range of dynamical and thermodynamical instabilities.
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