AOSC 634 Air Sampling and Analysis

AOSC 458R Advanced Topics in Atmospheric and Oceanic Science:
Observations in Atmospheric Science

Spring 2020

Summary: Theory and practice of measurements of atmospheric properties, gases, and particles including priority pollutants and greenhouse gases. 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. For 458R one fewer lab report is due, and exams will be modified. Prerequisites: AOSC 400 or 431 for AOSC 458R; AOSC434 or AOSC 620 for AOSC 634.

Lectures, MF 1:00pm in ATL 2330, can be arranged to accommodate student schedules.
Laboratory, W 1:00 to 4:00pm (or by arrangement) ATL 4332
Mondays will be guidance on methods and applications
Fridays will be Lecture on the theory of observations.

		Lecture Schedule	

		Topic					Week

 		A. Introduction 	     		 1
 		B. Objectives   	     		 1
 		C. Precision, Accuracy, Uncertainty 	 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
Lesson 1. Introduction and Temperature
Lecture 1. Measurement Theory
Lesson 2. Pressure
Lesson 3. Humidity
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
Lecture 12 Sulfur Cycle and Measurements

		Experiment Schedule
Topic Week
I. Fundamental Atmospheric Properties A. Precipitation 1-6 Precipitation lab guide B. Temperature 1 Temperature lab guide C. Pressure 2 Pressure lab guide D. Flow Meters 3 Flow Control lab guide E. Humidity 4 Humidity lab guide F. Surface-based remote sensing 5 II. Trace Gases A. Ozone 8 O3 lab guide B. Sulfur Dioxide 9 SO2 lab guide C. Oxides of Nitrogen 10 NOX lab guide D. Greenhouse gases CO2, CH4, CO, H2O 11 GHG lab guide Picarro manual III. Aerosol Optical Properties A. Scattering 12 B. Absorption 13 IV. Special Topics Final Exam in finals week. 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. Handbook of Meteorology Finlayson-Pitts and Pitts, Atmospheric Chemistry, 2002. Excellent WMO site Grading: Best seven (for undergraduates best six) of nine laboratory reports (70%) lab notebook (10%) and a final exam (20%). The AOSC634 final will include additional, more challenging questions. Lab reports will be graded on a 10-point basis (>9 = A; >8 = B; >7 = C) the average of your best reports will be counted.