Phys 650: Experimental Atmospheric Physics - Spring 2009

Material covered in class

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Class 1

28/Jan/09

 

Introduction; review of procedures & rules; Discussion on atmospheric aerosols and aerosol sampling instrumentation.

Files to download:

1- Course introduction and Structure

2- Introduction to Atmospheric Aerosols

 

 

 

3- Aerosol Samplers and Measuring Devices

 

Class 2

02/Feb/09

 

Preparation of Sampling Station; Filter Pre-weighting; Calibration of Station Components; Preparation of Sampling Documentation.

Files to download:

1- Station Schematics

2- Example of Sampling Instruction Manual Students must update it for this particular station and present it as part of their assignment for the experiment.

 

 

 

3- Example of Filter Log Sheet Students must keep an updated folder with the daily log sheets.

 

Class 3

11/Feb/09

 

  • Follow up Discussion on the Aerosol Sampling Station

- post weighing procedures

- 2nd mass flow meter calibration

  • Introduction to the Course Project Part I: Sunphotometers and Sunphotometer;

- Spectral characterization of the LED detector

 

 

 

 

Presentations Discussed in Class:

1-      Project Introduction

2-      Operational Amplifiers

 

Important references:

1- Nice Discussion on LED sunphotometer from its inventor Forrest Mims III.

2- LED Sunphotometer reference 1

3- LED Sunphotometer reference 2

4- LED Sunphotometer reference 3

5- Data Sheet for LM741 Operational Amplifier

6- Printed Circuit Board Tutorial

 

 

Class 4

 

 

Construction of the Portable Sunphotometer

 

 

 

 

 

Class 5

 

 

- Introduction to atmospheric radiative transfer and radiative transfer codes

- Introduction to Radiometry and Instrument FOV.

- Open Lab: Calibration of the Sunphotometer and other Radiometers

  • FOV measurements for: LED emission, plain LED detection, LED+ collimator detection
  • Integrating Sphere (Calibration files)

 

 

 

-         Extra Questions for course project

-         Procedures for Sunphotometer calibration

-         Spreadsheet for solar angle calculation

 

 

Class 6

04/Mar/09

 

Application of scanning electron microscopy (SEM) on aerosol studies Part I: Imaging

-         Analysis of filters collected at the UMBC station

-         Analysis of aerosols generated in the Laboratory

 

 

 

Presentation 1 - Introduction to electron microscopy

Presentation 2 Aerosol particle sizing

Movie on SEM - http://www.youtube.com/watch?v=lrXMIghANbg

 

Class 7

11/Mar/09

 

Application of electron microscopy on aerosol studies Part 2: Elemental analysis using X-ray emission

-         Analysis of filters collected at the UMBC station

-         Analysis of aerosols generated in the Laboratory

 

Presentation 1 Individual particle analysis using the X-ray system of the Scanning electron microscope

Presentation 2 Discussion of short report from last class (we decided to put this one online because the discussion can be interesting for the students.

 

 

 

 

 

Class 8

25/Mar/09

 

Relative Humidity, Dew, and Frost Points

-         Power point file with objectives, experiments, references, and instructions for short report.

-         Reference 1- Frost Point Hygrometer JGR paper

-         Reference 2- RH discussion: Standard X WMO

-         Reference 3- Uncertainty on RH measurements

-         Example of Psychrometric Chart

-         Vaisala Humidity Calculator

 

 

 

 

 

Class 9

01/April/09

 

Continuation of previous experiment: Relative Humidity, Dew, and Frost Points

 

 

 

 

 

Class 10

08/April/09

 

- Discussion on short reports from classes 8 and 9, plus Beltsville radiosondes.

- Tiger team work on course project

 

 

 

 

Class 11

15/April/09

 

Introduction to Surface BRDF and Atmospheric Scattering.

Continued work on course project.

 

 

 

 

Class 12

22/April/09

 

Measurements of Surface BRDF and Atmospheric Scattering.

 

 

 

Students will measure the angular properties of several surfaces in the laboratory, and will apply Fresnel equations on its interpretation.

 

Class 13

29/April/09

 

Continued Measurements of Surface BRDF and Atmospheric Scattering

 

 

 

 

Class 14

 

 

 

 

 

 

 

Class 15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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