Visibility Intro






























Introduction to Visibility with Animated Figures

Instruction Guide

Introduction to Visibility is a pictorial guide to visibility starting from the fundamental principles for visibility impairment and causes of regional haze to aerosol concentration and trends.

CAUTION: YOU NEED ACROBAT VERSION 5.0 and QUICKTIME 4.0 to activate these movies!


Click here to view the interactive (3.7 MB) PDF version of



A pkzipped file of all Quick Time animations used in the Introduction to Visibility document is available here (33 megs).


Hints for Use

To ease your exploration of the document, click on the bookmark tab to the left of the text screen to maneuver throughout desired sections of the book.


Visibility-Related Terms

Scientific terms are highlighted in blue throughout the document; Double-click on the term to get a descriptive definition.


Park Meta-Data Links

Certain IMPROVE sites are in green text throughout the document. Click on these links to be directed to IMPROVE's metadata for that particular park.



Throughout the Introduction to Visibility document, you will find movies that are directly linked to particular figures. Click on the figure to begin playing the integrated animation; press Escape to exit the animation.


Your system must meet these requirements to access all the functions within the document and to allow the movie files to run properly.



To open document, Adobe Acrobat Reader 5.0 or higher (Click here to download)


To view animations, QuickTime 4 or higher (Click here to download)