rainfall

This could alter storm tracks, rainfall patterns and food production far to the south.

Make sure that you are safe from the rainfall.

Information on temperature, rainfall, and other aspects of the climate that can be inferred from the systematic changes in properties is usually referred to as proxy data.

The impact of rainfall upon the surface water and groundwater resources of the desert is greatly influenced by landforms.

Rainfall is not completely absent in desert areas, but it is highly variable.

Although southern Maya areas received more rainfall than northern areas, problems of water were paradoxically more severe in the wet south.

But rainfall in the Maya homeland is unpredictably variable between years; some recent years have had three or four times more rain than other years.

The climatic changes in southwestern Asia were more subtle, in that they involved shifts in mountain snow lines, rainfall patterns, and vegetation cover.

Rainfall is also increased in cities.

By this time, the Saharan people were probably using domestic crops, experimenting with such summer rainfall crops as sorghum and millet as they move out of areas where they could grow wheat, barley, and other Mediterranean crops.

On the other hand, rainfall increased in the interior of western Africa, and the northern limit of the tsetse fly, an insect fatal to cattle, moved south.

And they are able to absorb a good bit of the rainfall due to their deep roots.

Drought-tolerant plants revive after one of these significant rainfalls.

The 1997-1998 El Nifio brought copious and damaging rainfall to the southern United States, from California to Florida.

Scientists try to document as many past El Nifio events as possible by piecing together bits of historical evidence, such as sea-surface temperature records, daily observations of atmospheric pressure and rainfall, fisheries’ records from South America, and the writings of Spanish colonists dating back to the fifteenth century.

This primitive form of "vegeculture" (cultivation of root and tree crops) may have been the economic tradition onto which the cultivation of summer rainfall cereal crops was grafted as it came into use south of the grassland areas on the Sahara's southern borders.

However, although rain forest soils are highly variable, they have in common the fact that abundant rainfall washes mineral nutrients out of them and into streams.

An annual rainfall of four inches is often used to define the limits of a desert.

From north to south in the Yucatan Peninsula, where the Maya lived, rainfall ranges from 18 to 100 inches (457 to 2,540 millimeters) per year, and the soils become thicker, so that the southern peninsula was agriculturally more productive and supported denser populations.

In the period 1970 to 1986, rainfall in the area decreased from 1,000 millimeters to 650 millimeters per annum, while above-average temperatures speeded up the evapotranspiration rate (the rate at which water is lost to the atmosphere through evaporation and the processes of plant life).

It depends on the rate at which water enters the lake, and that depends on the rainfall and the evaporation rate.

The areas that are now desert were, like all arid regions, very susceptible to cycles of higher and lower levels of rainfall, resulting in major, sudden changes in distributions of plants and animals.

But they have a mechanism to prevent one year of low rainfall from wiping them out.