What are rainfall patterns?
Rainfall pattern means the distribution of rain geographically, temporally, and seasonally. The tropics receive more rainfall than deserts. Cooler places like the poles receive no rainfall, as it is converted to snow before it falls to the ground.
What is the rainfall in Africa?
An average of less than 1,000 millimeters of rain falls per year across most of Africa (Map 1). Rainfall tends to decrease with distance from the equator and is negligible in the Sahara (north of about latitude 16°N), in eastern Somalia, and in the southwest of the continent in Namibia and South Africa.
How does the rainfall vary in Africa?
Most of the African continent is semi-arid and hence prone to extreme variations in rainfall from year to year. The extreme droughts that have plagued the Sahel and eastern Africa are particularly well known. The largest were downward trends in the Sahel and western sectors of North Africa.
What part of Africa gets the most rainfall?
Does rain fall in patterns?
Rain doesn’t fall in the same quantity in any place around the world. There are a range of reasons for differing rainfall patterns: Desert areas (most lie between 15° and 35° north and south of the equator) have limited rainfall as they receive sinking, dry air from high pressure systems.
What are the 4 types of rainfall?
The different types of precipitation are:
- Rain. Most commonly observed, drops larger than drizzle (0.02 inch / 0.5 mm or more) are considered rain.
- Drizzle. Fairly uniform precipitation composed exclusively of fine drops very close together.
- Ice Pellets (Sleet)
- Small Hail (Snow Pellets)
- Snow Grains.
- Ice Crystals.
Does it rain a lot in Africa?
In fact, the climate of Africa is more variable by rainfall amount than by temperatures, which are consistently high. Precipitation intensity is always high, and it is a hot continent. Warm and hot climates prevail all over Africa, but mostly the northern part is marked by aridity and high temperatures.
Why is most of Africa warm?
In the summer, an area of high atmospheric pressure known as the Azores High blocks moist Atlantic air from reaching the region’s Mediterranean coast. For this reason, summers in North Africa are hot and dry, influenced by winds blowing north from the Sahara.
What does 10mm of rain mean?
What does 10 mm rainfall mean? 10 mm rainfall means that if rainfall fell on a flat land surface , with no slope ,no evaporation, and no percolation of water I.e. water does not go underground, then the amount of rainfall would be 10 mm measured from the ground.
What is rainy season called?
The wet season (sometimes called the rainy season) is the time of year when most of a region’s average annual rainfall occurs. Generally, the season lasts at least a month. The term green season is also sometimes used as a euphemism by tourist authorities.
What is a heavy downpour of rain called?
Definitions of downpour. a heavy rain. synonyms: cloudburst, deluge, pelter, soaker, torrent, waterspout.
What is the rainfall pattern in South Africa?
Over most of South Africa, there is a definite rainfall pattern with rainfall increasing from west to east. This is illustrated by the yearly rainfall difference between Port Nolloth on the west coast, 50 mm and Richards Bay, 1 000 mm at the same latitude on the east coast.
Where does most of the rain in Africa come from?
This leads to significantly more rainfall over northeast sections of Madagascar than its southwestern portions. Southern Africa receives most of its rainfall from summer convective storms and with extratropical cyclones moving through the Westerlies. Once a decade, tropical cyclones lead to excessive rainfall across the region.
Which is the longest rainfall series in Africa?
This work presents the longest rainfall series ever published for 13 African regions. These encompass most of the continent and are 125 to 175 years in length. Around 1968 a change to more arid conditions occurred in the Sahel and North Africa.
What kind of climate does most of Africa have?
Most of the African continent is semi-arid and hence prone to extreme variations in rainfall from year to year. The extreme droughts that have plagued the Sahel and eastern Africa are particularly well known.