There can be no doubt that lunation, more especially in tropical climes, influences diseases; but the effects of insolation are every where observable.
The days and nights are of almost equal length and though there is rapid radiation at night there is also rapid insolation by day.
The aridity is a factor, since heavy snowfall means a lengthening of the period of precipitation in which a cloud cover shuts out the sun and a shortening of the period of insolation and melting.
Reference to the figures in this chapter will show great variation in the level of the timber line depending upon insolation as controlled by slope exposure and upon moisture directly as controlled largely by exposure to winds.
The line a-b represents a depression in the opposite direction due to the different degree ofinsolation on the northern (sunny) and southern (shady) slopes.
The values of insolation at the earth's surface, after passage through the atmosphere, have been calculated.
The decreasing altitude of the sun then more than compensates for the increasing length of day, and the value of insolation diminishes, a minimum being reached at about lat.
When exposed to direct insolation the skin burns and blisters; the lips swell and crack.
On the 21st of December the conditions in southern latitudes are similar to those in the northern hemisphere on the 21st of June, but the southern latitudes have higher values of insolation because the earth is then nearer the sun.
Going polewards from the northern tropic on the 21st of June, the value of insolation increases for a time, because, although the sun is lower, the number of hours during which it shines is greater.
On the 21st of June the equator has a day twelve hours long, but the sun does not reach the zenith, and the amount of insolation is therefore less than at the equinox.
Distribution of Insolation over the Earth's Surface.
At the pole there is one maximum at the summer solstice, and no insolation at all while the sun is below the horizon.
The intensity ofinsolation and of radiation both increase aloft in the cleaner, purer, drier and thinner air of mountain climates.
The double period of insolation above noted for the equator prevails as far as about lat.
At the solstices the two poles receive the largest amounts of insolation which any part of the earth's surface ever receives.
This evidently is because insolation and radiation, acting through the soil of the hill, heat and cool the air to a greater extent than the free air is heated and cooled at the same altitude, and this must be true at every mountain station.
Assmann of Berlin, is called the aspiration thermometer, and is designed to prevent the casing surrounding the thermometer from being heated by insolation or conduction, and to insure a flow of air past the thermometer bulbs.
These last conditions can be readily traced to the effects of insolationand radiation near the ground.
All over the world the least cloudiness is in the evening, when the sum of the combined effects of radiation and insolation is least.
In water not subjected to insolation anthrax spores were found to retain their vitality for several months.
This difference in resistance to insolation was also observed in the case of dried blood and broth respectively--eight hours' exposure killing the bacilli in the former, whilst five hours sufficed in the latter.
The problem of insolation has been attacked from an entirely novel point of view by Dr.
Now sunshine has long been credited with possessing therapeutic powers, and, indeed, traditions of cures effected by the ancients by means of insolation have been treasured up and handed down to the present day.
Thus it was only after one hundred and fifty-one hours' insolation in Thames water that these spores were entirely destroyed, whilst a few hours' exposure in the usual culture media is generally sufficient for their annihilation.
Lohmann also found that yeast cells, after being exposed to sunshine, assumed a shrunken and distorted appearance, showing that insolation had produced a striking physiological effect upon the structure of these cells.
North of the torrid zone, however, the rays of the sun become more and more oblique to the earth's surface, and hence insolation becomes weaker and weaker for a given period of sunshine as one travels from south to north.
Under the prevailingly cloudless skies of the hot arid lands of the southwestern portion of the continent insolation is intense and the growth of vegetation phenomenal when the necessary amount of water is supplied.
The intensity and seasonal distribution of insolation are prime factors on which many important results hinge.
Then again the double duration of summer would tend to emphasize insolation as the important factor in the matter.
But, though the summer and winter insolation thus differ, they are the same for each hemisphere in turn.
The greatest insolationon earth is not, as we might suppose, at the equator, but at the parallels of 43.
In midsummer the greatest insolation occurs in the arctic and temperate, not in the tropic regions; on the other hand, an atmosphere tends to accumulate heat for the tropics.
This rapid fall while exposed to oblique sunshine is quite in harmony with the rapid loss of heat during the few hours of darkness during an eclipse, both showing the prepotency of radiation over insolation on the moon.
This law is, that reduced atmospheric pressure increases radiation, or loss of heat, more rapidly than it increases insolation or gain of heat, so that the result is always a considerable lowering of temperature.
Minimum humidities were about the same for all stations, since they are affected by insolation received during the day, and not by the drainage of cold air at night.
Nights of high trapping success usually were associated with days having solar insolation below the average.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "insolation" in a variety of sentences. We hope that you will now be able to make sentences using this word.
