ATMS 360 Atmospheric Instrumentation [main page] [assignments] [presentations] [previous notes 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 2016].

 


Week 9: 27 March (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

NOTE: WE WILL BE MEET IN RM 113 OF LEIFSON PHYSICS THIS WEEK.

Tuesday's class: We will continue to work on assignment 4, to be turned in using webCampus, submitted as a MSWORD doc.
We will concentrate on the pressure measurements, as a function of height in the building, and conversion of pressure to height,
and will discuss the accuracy and precision of the pressure measurement.
Notes on converting pressure to height have been added to the assignment page.

Everyone should already have their temperature time constants determined from last week.

Temperature time constant notes. Click on image for larger version.


 

 

 

Week 8: 13 March (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

NOTE: WE WILL BE MEET IN RM 113 OF LEIFSON PHYSICS THIS WEEK.

Tuesday's class: We will continue to work on assignment 4, to be turned in using webCampus, submitted as a MSWORD doc.
Everyone has now acquired data. We will work on obtaining the time constants for the sensors on Tuesday,
and will look the accuracy and precision of the pressure measurement.

Related Topics

Upcoming talk at UNR

Speaker: Dr. Elizabeth Austin , President, WeatherExtreme

Date: April 7th

Time: 4:00 pm

Location: Physics Conference room 208, Leifson Physics

Title: The Trials, Tribulations & Excitement of Running a Private Weather Company: From Forensic Meteorology to Atmospheric Problem Solving and Beyond!

Abstract: Weather is a business and it is BIG business. Weather and climate used to be left to governments to 'take care of', now private weather companies are far surpassing the government in terms of the number of 'clients' and dollars. Global economies are directly and indirectly affected by weather and climate change. Back in 1998 in testimony to the U.S. Congress, former commerce secretary William Daley stated, "Weather is not just an environmental issue; it is a major economic factor. At least $1 trillion of our economy is weather sensitive." WeatherExtreme Ltd. was founded in 1994 and provides specialty forecasts, forensic meteorology and weather problem solving to industry, governments and private companies. Being a small weather company in today's world presents both exciting opportunities and challenges. Dr. Austin will discuss some of her most challenging forensic meteorology cases along with experiences being the Chief Scientists and forecaster for the record-breaking Perlan Project. Currently in phase II of III phases, the Airbus Perlan Mission II is an initiative to fly an engineless glider with two pilots to the edge of space (100,000 feet), higher than any other winged aircraft has operated in level, controlled flight, to open up a world of new discoveries related to high-altitude flight, climate change and space exploration. Our scientific research will employ an instrumented glider that has the capacity to soar deep into waves and thus answer some very important questions concerning the source of stratospheric gravity waves and their genesis.

 

Reno sounding based on a model so show diurnal variations

 

 

 

 

 

Week 7: 6 March (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

NOTE: WE WILL BE MEET IN RM 113 OF LEIFSON PHYSICS THIS WEEK.

Tuesday's class: We will work on assignment 4, to be turned in using webCampus, submitted as a MSWORD doc.
We will acquire data for part a) of assignment 4 on Tuesday, and will analyze this data to obtain our sensor's response time.
Then we'll continue with the other parts once we know our sensor response time.

Part of the class acquired data while the other part had a tour of the Atmospheric Science observatory at UNR.

Dress warm for Tuesday's class as well be doing measurements outside for part of the class.

 

 

 

Week 6: 27 February (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

NOTE: WE WILL BE MEET IN RM 113 OF LEIFSON PHYSICS THIS WEEK.

Tuesday's class: We will work on assignment 3, to be turned in using webCampus, submitted as a MSWORD doc.

 

Related Items (especially with last week's discussion of raindrops)

Experiments with freezing and shattering raindrops. Paper. Movies.

 

Week 5: 20 February (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

Because of the rain, change of plans for this week. We'll concentrate on the measurement of rain, looking at assignment 2.

Tuesday's class: We worked on the assignment together. The white board notes are below, click on image for larger version.

Thursday's class: We'll work on the radar precipitation measurements questions.

Week 4: 13 February (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

Tuesday class:

We worked with comparing modeled and measured downwelling IR. Note: We prepared histograms of the measurement residuals at the end of class,
and found that the Macintosh version of Excel does not easily do this, so histograms of the residuals are optional in assignment 1.

Everyone should have the December 2016 data set analyzed up to the same point we have analyzed the June 2016 case in class.
Be sure to bring questions to class and office hours.

Continue working on the June 2016 data set for assignment 1.
As homework after each class, do the same thing for the December 2016 data set.

Will work on the assignment as well as discuss the radiation sensors referred to in the week 2 notes as time permits.

Week 3: 6 February (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

Continue working on the June 2016 data set for assignment 1.
As homework after each class, do the same thing for the December 2016 data set.

Thursday: Will work on the assignment as well as discuss the radiation sensors referred to in the week 2 notes.

Week 2: 31 January (NOTE: FREE TEXTBOOK ON ATMOSPHERIC SCIENCE BASICS AVAILABLE HERE and local backup.)

Discuss solar and infrared radiation measurements in the atmosphere, displaying sensors.

Demonstration of how a pyranometer works for solar radiation measurement - light absorption causes heating - measure temperature as a proxy for radiation.

Demonstration of how a pyrgeometer works for solar radiation measurement - light absorption causes heating - measure temperature as a proxy for radiation.

LAHM Aerosol light absorption heating method measurement of aerosol from glaciers.

How to quickly make an, albeit fragile, strongly light absorbing surface; light absorbing black paint.

Radiation measurements: spectral response of thermal sensors versus silicon detectors - demonstration with light absorbing disk, IR thermometer, and IR camera.

Transmission of light through windows of different materials.

Assignment 1 is posted and will be the emphasis of our efforts.

Tuesday Class boards

 

Week 1: 23 January

Thursday Class: Discussion of the science behind assignment 1.

Lecture notes from class on this subject are in this table.
Click on the image to get a larger version.


board 1


board 2

board 3

Tuesday Class:

Introductions and orientation.
Three places to learn about what is going on in this class:
Daily Notes (here).
Calendar.
Assignments.

Syllabus.

Snow crystals and snow flakes; example of how to use your smart phone camera for science. Become an observer of the world around you.

Humidity and Temperature Measurement Example

It's the dry season! And wet season! How can that be?
Relative humidity calculator
.
Dewpoint temperature calculator.
Lifting condensation level calculator.
Air temperature in room = 21.3 C +- 1 C.
Wet bulb temperature in room = 9 C +- 1 C.
Dew point temperature in room = -3.6 C.
Calculated relative humidity = 18.5%.
Water vapor to air mixing ratio = 3.3 g/kg.
Lifting condensation level pressure = 603.5 mb.
Lifting condensation level temperature = -8.52 C.
Surface pressure = 877 mb.
Scale height H=8614 meters on that day based on room temperture.
Lifting condensation level height = 3220 meters.

For Thursday's class, calculate the altitude in meters of the lifting condensation level, and the scale height of the atmosphere.
Also define the dew point temperature and wet bulb temperature, highlighting the difference between them.



R is the universal gas constant divided by air molecular weight, R=286.7 J/(kg K) for dry air.


GOES R satellite: Help predict solar power with a 5 minute update, for example; satellite instruments are extremely useful!!!

Here are some images from GOES R, known as GOES 16.

Why are measurements important in Atmospheric Science? Perspective and photo by Kelly Redmond. Click on image for larger version.


Evolution of climate model grids as computers and algorithms improve. From https://scied.ucar.edu/longcontent/climate-modeling

[How to write lab report]

Example lab report

Another example lab report

ALL WILL WORK TOGETHER FOR A COMMON PURPOSE: To study the atmosphere from many perspectives! !