Class Notes (839,471)
United States (325,984)
Economics (72)
George (12)
Lecture

Econ in the news 9

2 Pages
97 Views

Department
Economics
Course Code
ECONOM 1051
Professor
George

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Description
Chapter 19: Deserts and Winds I. Dryness and Dry land A. dry regions cover 30% of earth’s surface; dry land=annual precipitation is  less than potential water loss by evaporation (dry land=water deficiency  increases every year) B. two types: 1. desert=arid 2. steppe= a marginal and more humid variant of desert (semi­arid) C. Concentrated in two areas= 1. subtropics­ low latitude desert in the vicinities of tropics of cancer and  Capricorn 2. middle latitudes­ located in deep interiors of continents; high  mountains in path of winds produce a rainshadow desert D. When air sinks, it is compressed and warmed; these conditions are opposite of  what is necessary for cloud formation and rain; middle­latitude deserts and  steppes occur in deep interiors of landmasses far from ocean and/or in places  where moisture­laden winds are blocked by mountains II. Geological Processes in Arid Lands A. Weathering­ not as effective as in humid regions. Mechanical weathering  produces unaltered rock and mineral fragments. Some chemical  weathering in deserts does produce clay, thin soils, and oxidized materials. B. Role of water in arid climates 1. practically all streambeds in these areas are dry most of the time 2. desert streams are said to be ephemeral (carry water only during  periods of rainfall) C. Role of wind in arid climates 1. transport of sediment by winds
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit