Report on the Present State of Our Knowledge, Respecting the General Circulation of the Atmosphere: Presented to the Meteorological Congress at Chicago, August, 1893 (Classic Reprint) - Softcover

Bort, L. Teisserenc De

Softcover

ISBN 10: 1332289312 ISBN 13: 9781332289318

Publisher: Forgotten Books, 2018

Synopsis

Excerpt from Report on the Present State of Our Knowledge, Respecting the General Circulation of the Atmosphere: Presented to the Meteorological Congress at Chicago, August, 1893

But if, as Ferrel wished, we apply the law of conservation of areas to these currents, their existence becomes extremely difficult of comprehension. At great heights friction is very small, so that the velocities ought to approach the theoretical ones; from which it results that there must be a very considerable s10pe in order to overcome centrifugal effects.

Now, one finds oneself in this dilemma - Either the elevation of the air necessary at the equator in order to produce this slope is due to a dynamic effect, and then the pressure at the equator ought to be very great in the lower regions, in consequence of the considerable mass of air which rises there; or the elevation is due to a difference of density, and then it is necessary that there should exist a difference of temperature between the equator and the pole which is not observed on the globe, or indeed that the currents should be produced at an enormous height.

M. Moller has, in fact, shown that it is necessary, in addition to the flattening of the globe, that the air should fall more than 21 kilometres in order to permit it to reach Now, the difference of temperature between the equator and the poles scarcely gives a fall of 900 metres at the height of metres. It would therefore be necessary that the current directed towards the pole should be at an enormous height, in order that the effect of the equatorial heating should produce the necessary difference of elevation, which is that of at least 21 kilometres.

I leave these reflections for the consideration of meteorologists, and I think that my reservation as to these currents will be approved.

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.

About this title

Product Description

Excerpt from Report on the Present State of Our Knowledge, Respecting the General Circulation of the Atmosphere: Presented to the Meteorological Congress at Chicago, August, 1893 The general circulation of the atmosphere is governed by the distribution of barometric pressure. It is therefore necessary, in the first place, to make that our study. If we collect the observations made during a long period, at a great many places over the globe, to at to ascertain the mean pressure at each of them, either for a year, or for various individual mouths, we see, as Maury has shown, that the barometric pressure varies with the latitude in an analagous manner in both tho northern and the southern hemispheres; so that tho distribution, on the whole, is characterized by the following features: - 1. A zone of low pressure near the equator. 2. Two zones of high pressure about 35 north and south. 3. Two zones of low pressure about 55 north and south. 4. Starting from these zones, the pressure increases slightly towards the pole-. When studying the distribution of the pressure in the different mouths, we see that these zones do not remainstationerybut move according to tho declination of tho sun. The following table, based on the maps of the mean isobars, indicates the principal phases of these displacements. 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."

Edition details

• Publisher: Forgotten Books
• Publication date: 2018
• Language: English
• ISBN 10: 1332289312
• ISBN 13: 9781332289318
• Binding: Paperback
• Number of pages: 31