AOSC 634 Air Sampling and Analysis

Spring 2017

SUMMARY: Theory and application of analytical techniques for the analysis of atmospheric gases and particles including priority pollutants. Hands on experience with traditional and state-of-the-art instruments will be provided. Discussion of the combined chemical and meteorological considerations in designing field experiments. One hour of lecture and four to five hours of laboratory per week. Prerequisites: AOSC 434, or AOSC 637, or consent of the instructor.

Lectures unless otherwise announced, every Wednesday at noon in CSS 2416 on Methods and Applications, and every Friday at 10 AM in 3426 on Theory.

		Lecture Schedule	

		Lecture					Week

 		A. Introduction 	     		 1
 		B. Objectives   	     		 1
 		C. Nomenclature 	     		 1
 		D. Static Response 	     		 1
 		E. Dynamic Response	     		 2
 		F. First & Second Order Systems	     	 2
 		G. Sinusoidal vs. step input		 3

 		A. Johnson and shot noise 	     	 3
 		B. Optical Absorption Systems 	     	 4
 		C. Chemiluminescent Systems 	     	 5

 		A. Exposure and Site Effects 	     	 6
 		B. Geographic Variability 	     	 7

 		A. Ozone by UV Absorption 	     	 8
 		B. CO2 CH4 & CO by Cavity Ringdown 	 9
 		C. NOx Detection 	 	     	10
 		D. Chemical Flux Measurement 	     	11
 		E. Aerosol Physics 	     		12
 		F. Aerosol Chemistry     		13

Lecture Presentation Files
Document Noise and its reduction
Lecture 1. Measurement Theory
Lecture 2. Dynamic Response First Order Systems
Lecture 3. Dynamic Response Second Order Systems
Lecture 4. Dynamic Response to Sinusoidal Input
Lecture 5. Vertical Flux Measurement
Lecture 6. Flow through a cylinder
Lecture 7 Exposure and Siting
Lecture 8 CO Detection
Lecture 9 Cavity Ringdown for GHGs
Lecture 10 NOx Chemiluminescence
Lecture 11 Aerosol Generation and Measurements


Experiment Schedule

EXPERIMENT Week I. Precipiation A. Amount 1-6 B. Chemistry and pH 6 Precipiation lab guide II. Fundamental Atmospheric Properties A. Temperature 1 Temperature lab guide B. Pressure 2 Pressure lab guide C. Flow Meters 3 Flow Control lab guide D. Humidity 4 Humidity lab guide E. Surface-based remote sensing 5 III. Trace Gases A. Ozone 8 O3 lab guide B. Carbon Monoxide 9 CO lab guide C. Oxides of Nitrogen 10 NOX lab guide D. Greenhouse gases CO2, CH4, CO, H2O 11 VI. Aerosol Optical Properties A. Scattering 12 B. Absorption 13 VII. Special Topics FINAL EXAM Text: Specially prepared laboratory guides, instrument manuals, and current scientific literature. Extensive use will be made of Instructor's Handbook on Meteorological Instrumentation, F. Brock, Ed.,(NCAR Tech. Note NCAR/TN-327+1A) 1984. Finlayson-Pitts and Pitts, Atmospheric Chemistry, 2002. Excellent WMO site Grading: Best seven of nine laboratory reports (70%) lab notebook (10%) and a final exam (20%). Lab reports will be graded on a 10-point basis, your seven best reports will be counted.