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- Sahel is a semi-arid grassland and shrubland transition zone stretching across the African continent between the Sahara desert to the north and the tropical savannas to the south (Herrmann, 2005).
www.researchgate.net › figure › The-Sahel-region-of-Africa_fig1_284364313
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What is the climate like in the Sahelian region?
Jun 17, 2022 · For example, the Sahel (Sahelian Zone) and the southern parts of the Sahara Desert have a dry savanna climate. It is characterized by extreme temperatures with low annual precipitation contributing to the devastating drought. Starting in the late 1960s, the Sahel endured severe droughts.
Feb 19, 2022 · The tropical desert has the highest mean annual temperature of any climate on Earth. The high temperatures are a result of the high sun angles throughout the year and having the highest percentage of sunshine of any climate.
- Geographical Distribution
- Controlling Factors
- Distinguishing Characteristics
Deserts are typically found in continental interiors of the subtropics and on the lee side of mountains in the midlatitudes. Cool coastal deserts are found where cold water upwells along a coast, stabilizing the air and preventing moisture formation like that near coastal Chile. Vast deserts cover much of north Africa (The Sahara), Saudi Arabia to ...
The most important controlling factor of the climate characteristics of the tropical desert climate is the year-round presence of subtropical high pressure. The descending air of the subtropical high adiabatically warms causing the air to dry out and inhibit condensation. Aridity also arises as distance from moisture sources increases. Leeward situ...
Temperature
The tropical desert has the highest mean annual temperature of any climate on Earth. The high temperatures are a result of the high sun angles throughout the year and having the highest percentage of sunshine of any climate. No month has an average temperature below 18oC (64.4oF) and many places have consecutive average monthly temperatures in the mid 30os Celsius (90oF). Daytime temperatures can reach 50oC (120oF) at low elevation inland deserts. The sky in the tropical desert remains cloud-...
Precipitation
Precipitation in the tropical desert is very irregular and unreliable. Low latitude deserts average less than 25 cm (10 in) in a year. An entire year's worth of rain may fall in one downpour. The continental location of many tropical deserts places them far from a source of moisture, the ocean. Combine continentality with the strong subsidence of the subtropical high and you have one of the driest places on earth. Air subsiding from the subtropical high is adiabatically warmed which reduces t...
Climate. The Sahelian climate is tropical. Summers are hot, with maximum mean temperatures varying from 33° to 36°C (91° to 97°F). Monthly mean minimum temperatures fall in the range of 18° to 21°C (64° to 70°). Rainfall in the southern area of the region is around 600 mm (23.6 inches). This decreases to around 200 mm (7.9 in) in the north.
Jul 24, 2015 · Nature Climate Change - Persistent drought in the Sahel in the 1970s and 1980s was caused by subtle changes in global sea surface temperatures. Now model results show that the direct effect...
- Alessandra Giannini
- alesall@iri.columbia.edu
- 2015
Tropical deserts are located in regions between 15 and 30 degrees latitude. The environment is very extreme, and they have the highest average monthly temperature on Earth . Rainfall is sporadic; precipitation may not be observed at all in a few years.
The Sahel climate is characterised by extreme temperatures with fluctuating periods of rainfall and intense drought. The area is particularly vulnerable to climate change, according to the United Nations, with temperatures increasing at 1.5 times the rate of the global average.
