Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert...

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Why are Deserts so dry?

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Transcript of Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert...

Page 1: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

Why are Deserts so dry?

Page 2: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

SAHARA DESERT in North Africa

Key places today…

• North Africa

• Sahara Desert

• Atlantic Ocean

• Canary Islands

• Morocco

• Atlas Mountains

Page 3: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

High PRESSURE or anticyclone

Air sinks

Air warms

Moisture evaporates

Clear blue skies and dry weather

Deserts are areas of permanent HIGH PRESSURE

1.

Page 4: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

Deserts lie on the West side of continents….

In zones where the prevailing winds come from the east.

2.

Page 5: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

Saharan sand blown off to the west by easterly winds.

Page 6: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

The cold ocean current : THE CANARY CURRENT

3.

Page 7: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

Canary Islands - fog

Page 8: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

‘It was pretty cold and windy in the damp fog’

Page 9: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

San Francisco coast California –

Also gets fogs.

Page 10: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

Moisture condenses out of the air over cold oceans

3.

Page 11: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

RELIEF RAINFALL and RAIN SHADOW

Atlantic Ocean Atlas Mountains Sahara Desert

Page 12: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

RAIN in Morocco

Sahara Desert

Rain near Equator

Page 13: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

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Page 14: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

Rain Shadow effect here

Sahara Desert Begins

Relief Rainfall Here

Page 15: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

Warm dry air sinks down into the Sahara…

… making it a desert

Page 16: Why are Deserts so dry? SAHARA DESERT in North Africa Key places today… North Africa Sahara Desert Atlantic Ocean Canary Islands Morocco Atlas Mountains.

The Relief Rainfall and the Rain Shadow happens in the dry SW USA too.


Africa Notes. North Africa Most important feature -Sahara desert Landscape mostly desert or mountains All countries border on Mediterranean Sea or Atlantic.

Africa Notes. North Africa Most important feature -Sahara desert Landscape mostly desert or mountains All countries border on Mediterranean Sea or Atlantic.

Ecosystem Project Sahara Desert

Ecosystem Project Sahara Desert

North Africa & SW Asia Notes · 2019. 3. 14. · Major Physical Features of North Africa & Southwest Asia •Deserts: •Sahara Desert in Africa •Largest desert in the world •Ergs–vast

North Africa & SW Asia Notes · 2019. 3. 14. · Major Physical Features of North Africa & Southwest Asia •Deserts: •Sahara Desert in Africa •Largest desert in the world •Ergs–vast

Sub- Saharan Africa refers to those countries that are a. South of the Sahara Desert b. In the Sahara Desert c. North of the Sahara Desert d. East of.

Sub- Saharan Africa refers to those countries that are a. South of the Sahara Desert b. In the Sahara Desert c. North of the Sahara Desert d. East of.

A Brief Analysis of the Sahara Desert Region in Northern Africa

A Brief Analysis of the Sahara Desert Region in Northern Africa

The Sahara. The Sahara The Sahara Desert 3,500,000 square miles Covers most of North Africa Mostly rocky terrain • Oases allows people can live with.

The Sahara. The Sahara The Sahara Desert 3,500,000 square miles Covers most of North Africa Mostly rocky terrain • Oases allows people can live with.

Important Geographical Features of Africa Sahara Desert Kalahari Desert African rainforest Atlantic Ocean Indian Ocean Mediterranean Sea Red Sea Nile River.

Important Geographical Features of Africa Sahara Desert Kalahari Desert African rainforest Atlantic Ocean Indian Ocean Mediterranean Sea Red Sea Nile River.

SAHARA DESERT REGION ► Sahara Desert covers most of No. Africa ► The largest desert in the world. North to South the Sahara is about 1000 miles & is about.

SAHARA DESERT REGION ► Sahara Desert covers most of No. Africa ► The largest desert in the world. North to South the Sahara is about 1000 miles & is about.

The Sahara Desert

The Sahara Desert

Sahara Desert Sahel savannas Kalahari Desert equato r Atlas Mountains Tropical rainforests largest in Africa; second largest behind the Amazon.

Sahara Desert Sahel savannas Kalahari Desert equato r Atlas Mountains Tropical rainforests largest in Africa; second largest behind the Amazon.

Sahara Desert Ecology Prjct

Sahara Desert Ecology Prjct

Sahara Desert -Science Piolo

Sahara Desert -Science Piolo

African Civilizations Chapter 8. Chapter 8 Vocabulary Sahara: Largest desert in the world. Northern Africa Sahel: Southern edge of the Sahara desert.

African Civilizations Chapter 8. Chapter 8 Vocabulary Sahara: Largest desert in the world. Northern Africa Sahel: Southern edge of the Sahara desert.

The Sahara Desert

The Sahara Desert

AFRICA REVIEW. Geography FEATURES: SAHARA DESERT GREAT RIFT VALLEY NILE RIVER KALAHARI DESERT ATLAS MOUNTAINS LAKE VICTORIA CONGO RIVER.

AFRICA REVIEW. Geography FEATURES: SAHARA DESERT GREAT RIFT VALLEY NILE RIVER KALAHARI DESERT ATLAS MOUNTAINS LAKE VICTORIA CONGO RIVER.

Sub-Sahara Africa SOL Review. What name is given to countries of Africa below the Sahara Desert?

Sub-Sahara Africa SOL Review. What name is given to countries of Africa below the Sahara Desert?

Sahara Desert

Sahara Desert

By: Ethan Surles Africa. Sahara The Sahara Desert is the main desert of Africa. It is in countries such as Chad, Libya, and Egypt.

By: Ethan Surles Africa. Sahara The Sahara Desert is the main desert of Africa. It is in countries such as Chad, Libya, and Egypt.

SAHARA DESERT VS THAR DESERT

SAHARA DESERT VS THAR DESERT

The Sahara Desert By: Danielle Healy. How big is the Sahara? What percent of Africa does it cover The Sahara is 3.3 million square miles. The Sahara covers.

The Sahara Desert By: Danielle Healy. How big is the Sahara? What percent of Africa does it cover The Sahara is 3.3 million square miles. The Sahara covers.