Author : Jakob Bjerknes
Publisher : Forgotten Books
Page : 20 pages
File Size : 45,8 Mb
Release : 2018-02-06
Category : History
ISBN : 0267967209
On the Structure of Moving Cyclones (Classic Reprint) by Jakob Bjerknes Pdf
Excerpt from On the Structure of Moving Cyclones Otherwise these results verify certain traits in various older theories of cyclones, while they disprove other traits in them. We are reminded both of Dove's old theory of the conflict between polar and equatorial currents as well as of the modern counter current theory Ferrel's convectional theory is confirmed in its essential part in as much asithe ascending air in the cyclone is warm, only that this warm air does not form a central core, but comes from the side, at the ground covering a warm sector. The general argument against the theory of Ferrel, that statistical investigations have proved a circular area round the centre of the cyclone to be cold rather than warm, does not disprove the principal point, that the ascending air is warm, but only the acci dental assumption of the symmetrical structure of the cyclone. The confusion concerning this point led to the paradoxical assumption that the mounting air in cyclones is cold and heavy. As under conditions theoretically specified by a symmetrical ey clone can really act as a kind of centrifugal pump, lifting the cold air of its central core, this assumption contains no intrinsic contradiction, but can now simply be dropped. -while thus an unnecessary element of v'. Hann's driven Eddy theory has to be left out, the general view of this theory, that the cyclones are merely partial phases of the general atmospheric circulation, has been fully confirmed. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
