Cloudland: A Study on the Structure and Characters of CloudsE. Stanford, 1894 - 208 oldal |
Részletek a könyvből
1 - 5 találat összesen 46 találatból.
1. oldal
... particles floating in the air , generally , but not necessarily , particles of water or ice . It will therefore be useful , before proceeding to analyse the various forms of cloud and their bearing on weather , to try and fix in our ...
... particles floating in the air , generally , but not necessarily , particles of water or ice . It will therefore be useful , before proceeding to analyse the various forms of cloud and their bearing on weather , to try and fix in our ...
2. oldal
... particles . The powers which are possessed by these two factors in altering the con- ditions and affecting the character of weather and climate are perhaps not sufficiently realised . But before dealing with these it will be necessary ...
... particles . The powers which are possessed by these two factors in altering the con- ditions and affecting the character of weather and climate are perhaps not sufficiently realised . But before dealing with these it will be necessary ...
7. oldal
... particles of water or congealed into those of ice . These processes must evidently take place whenever a layer of moist air has its temperature sufficiently lowered . This result may be attained when the dust particles in the air lose ...
... particles of water or congealed into those of ice . These processes must evidently take place whenever a layer of moist air has its temperature sufficiently lowered . This result may be attained when the dust particles in the air lose ...
9. oldal
... particles pouring in a stream down the ex- terior surface of the cloud until the current is finally checked at some lower level by the increasing heating effects of this condensation . And it will be fairly · evident that such a process ...
... particles pouring in a stream down the ex- terior surface of the cloud until the current is finally checked at some lower level by the increasing heating effects of this condensation . And it will be fairly · evident that such a process ...
12. oldal
... particles of air will intermingle to a certain extent at the surface of contact , and whirls , ripples , and waves will be produced , whose size and shape depend on the respective velocities and directions of these currents . Now , if ...
... particles of air will intermingle to a certain extent at the surface of contact , and whirls , ripples , and waves will be produced , whose size and shape depend on the respective velocities and directions of these currents . Now , if ...
Más kiadások - Összes megtekintése
Cloudland; a Study on the Structure and Characters of Clouds William Clement Ley Nincs elérhető előnézet - 2013 |
Gyakori szavak és kifejezések
altitude anticyclones Anvil cloud appear aqueous vapour Arabian Sea areas of high atmospheric circulation atmospheric pressure barometric pressure calm-belt cause Chart Cirro Cirro-filum Cirro-macula Cirrus cloud-forms clouds of Inclination clouds of Interfret clouds of Inversion colder condensation continent Cumuliform clouds Cumulo-nimbus Cumulo-rudimentum Cumulo-stratus Cumulus curve cyclonic disturbances deflected direction dust particles earth's surface effects elevation equator equatorial belt exist extensive formation forms of cloud globe hail heat high pressure higher latitudes horizontal increase inversion movements isobaric land surfaces layers of air Lenticular cloud low pressure lower Mammatus monsoon motion mountain moving nearly Nebula Nimbus north-east northern hemisphere nubecules observer occurs oceanic surfaces poles portion precipitation produced radiation rain regions rotation season seen shower cloud side snow southern sphere Stratus Maculosus Stratus Quietus summer summit takes place temperature thermal equator thunderstorms tion Trades tropical upper currents upward variety velocity water-vapour winds winter
Népszerű szakaszok
164. oldal - ... considerable. Hence the interior and most violent portion of a cyclone, always gyrating from right to left in the northern hemisphere, and the contrary in the southern, must always gradually move towards the pole of the hemisphere in which it is. While between the equator and the tropical calm belt, it is carried •westward by the general westward motion of the atmosphere there, but after passing the tropical calm belt, the general motion of the atmosphere carries it eastward, and hence the...
138. oldal - In whatever direction a body moves on the surface of the earth there is a force arising from the earth's rotation which deflects it to the right in the northern, but to the left in the southern hemisphere.
118. oldal - Cirrus moving from South is generally an indication of /Unsettled weather, especially in summer. The temperature is then usually above the mean for the time of year. " Cirrus from South-west indicates unsettled and sometimes stormy weather in winter. In summer it often precedes thunderstorms, but with a high barometric pressure and 'a high temperature it frequently has no disturbing influence, and is then usually replaced by Cirro macula.
118. oldal - Cirrux are held to be of service for forecasting purposes, the following rules by the author may be considered useful and instructive : — "Cirrus moving from North or North-east with a high barometer is a sign of settled weather in summer and of temporarily fine weather in winter. With a low barometer it is a sign of marked improvement in weather.
164. oldal - ... being greater on the polar side, where the deflecting forces which cause it are greatest, its action upon the atmosphere in advance of it is greater than on the equatorial side, where these forces are much less, and hence new portions of the atmosphere are being continually brought into action on the one side, while the resistance of the earth's surface, and the adjacent portions of atmosphere on the other side, are continually overcoming the comparatively weak forces there, and destroying the...
12. oldal - ... which are not caused in this way. The second class of clouds are termed clouds of interfret. Interfret is explained as the action of two air currents on one another, the two currents differing -in velocity, or direction, or both, and producing a wave motion or eddy motion at the surface of contact. " Now if the upper current be colder than the lower, as will usually be the case, and if the lower current contain watervapour near its maximum tension, it is evident that condensation will very likely...
118. oldal - Hast, a rare occurrence, is a sign of fine weather in winter, but of unsettled weather in summer. " Cirrus moving from South-east (but it rarely does so with a low and unsteady barometer) is a sign of improving weather in winter, and in summer frequently indicates coming thunderstorms. " Cirrus moving from South is generally an indication of /Unsettled weather, especially in summer. The temperature is then usually above the mean for the time of year. " Cirrus from South-west indicates unsettled and...
176. oldal - On the other hand, under the same circumstances, let the cirrus appear first in the NNE, and travel from a northerly point, we are not then likely to experience more than a few slight showers of sleet or snow, with only a moderate backing and veering of the wind.