30271 Eve DeAngelis January 8, 2014.docx

2 Pages
Unlock Document

Earth & Environmental Sciences
ENVR 1104
Malcolm D Hill

1 1/8/14 Natural Disasters and Catastrophes ENVR 1104 CRN: 30271 Chapter 1: Natural Hazards and Disasters • Hazard: - A natural process becomes a natural disaster when it poses a threat to human life or property - A natural hazard then becomes a disaster when there are significant damages and casualties • Predictions: - A prediction does not account for probability - Magnitude and frequency curves allow someone to make a prediction - For example, some volcanoes erupt on a fairly consistent pattern, so you can predict that the probability of a future eruption will grow at that location, every year closer to the “cyclic eruption pattern” that you go • Forecasts: - Normally pitched in terms of probability - Reoccurrence intervals- forecasts can be expressed as a reoccurrence interval- the probability that a natural event of a certain size will occur is based off of past records for example: a 50 year flood, or a 100 year earthquake • Feedback loops: - Positive feedback loop= when the increase in one factor (A), causes a change in other environmental factors, ultimately increasing “A” even more  Ex: global warming causes more rapid melting of the arctic sea, the resulting darker sea water absorbs more of the suns energy than the white ice does
More Less

Related notes for ENVR 1104

Log In


Join OneClass

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

Sign up

Join to view


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.