MET4450 & MET5451 Atmospheric Physics II and …coaps.fsu.edu/pub/bourassa/Ali/rad_tran/Introduction.pdf · MET4450 & MET5451 Atmospheric Physics II and Advanced Atmospheric Met

MET4450 & MET5451Atmospheric Physics II

andAdvanced Atmospheric Met. II

Dr Mark BourassaDr. Mark BourassaClass Time: TR 12:30 1:45Offi 10 00 11 00Office Hours: TR 10:00 11:00Office: 315 Love Bldg (TR: 645-4788)

233 R M Johnson (MWF: 644 6923)233 R. M. Johnson (MWF: 644-6923)[email protected]: Scott Meech

http://campus.fsu.edu/[email protected] The Florida State University

Atmos. Physics IIIntroduction 1

TA: Scott Meech

Course Objectives Students will learn the general concepts of radiation local energy budgets,

and the global energy budget. The fundamentals of radiative transfer and cloud physics will be used to The fundamentals of radiative transfer and cloud physics will be used to

examine how radiation interacts with the atmosphere clouds as well as other atmospheric constituents t dif th l l d l b l li t to modify the local and global climates.

Radiative transfer and cloud physics are both important to remote sensing of the atmospheric and the planet surface. Students will become familiar with remote sensing applications

related to radiative transfer, clouds, and other atmospheric constituents.

This course should prepare students for more advanced courses on radiation, cloud physics, and remote sensing.



Course Web Page Accessible through http://campus.fsu.edu/ on the campus

Everyone in this class has access to the course site. You must have web access to get to the class website!

On line versions of

You must have web access to get to the class website! Get this ASAP!

Syllabus and course outline. Assignments. Grades Grades. Lecture notes will be put online before the lecture.

I suggest that you merge your in class notes with the print outs.



Getting Your FSU EMail Account

https://fsuid.fsu.edu/ If you don’t already have an account you can get one If you don t already have an account you can get one.

Passwords can be reset or changed Forward (in theory) your email to an account you regularly check.



The Basics TEXT BOOKS:

A First Course in Atmospheric Radiation by Grant W. Petty P ill b d il bl th bl kb d it Papers will be made available on the blackboard site

Useful resources: http://www.nrlmry.navy.mil/nexsat-bin/nexsat.cgi

A good start for remote sensing images & operational uses remss.com more detailed information for some sensors www.rap.ucar.edu/weather

Read and follow the honor code. Students with disabilities needing academic accommodations

Register with FSU's Student Disability Resource Center Register with FSU s Student Disability Resource Center Let me know in a timely fashion, so I can plan ahead accordingly



Grading Exams: Midterm #1 Feb. 3 (on all material through Jan. 27) Midterm #2 March 15, 18, or 22 (on all material from Feb. 1 through

a week prior to the midterm)p ) Midterm #3 April 12 (on all remaining material through April 5) Final: None Dates for midterms are tentative: subject to change Dates for midterms are tentative: subject to change.

Grading: Grades will be routinely updated on the blackboard site.

MET 4450• 25% Homework• 15% Discussions

MET 5451• 25% Homework• 35% Project:15% Discussions

• 20% for Midterm #1• 20% for Midterm #2

20% f Midt #3

j• 20% Written• 15% Oral

• 20% for Midterm #1



• 20% for Midterm #3 • 20% for Midterm #1• 20% for Midterm #2

Scoring the WorkA weighted average 84%A weighted average 84%A 84% > weighted average 80%B+ 80% > weighted average 78%B 78% > weighted average 72% • Grading guidelines are

available in the syllabusB % > weighted average 70%C+ 70% > weighted average 68%C 68% > weighted average 62%C 52% > weighted average 60%

available in the syllabus.

C % g g %D+ 60% > weighted average 58%D 58% > weighted average 52%D 2% > weighted average 50%F weighted average < 50%F weighted average < 50%

Consistent studying of material and class attendance are generally among the factors which determine grades earned by students.

Makeup exams are not given except as noted by University policy.p g p y y p y Extra credit is available – for improvements to lecture notes, and Late assignments are accepted, but grades are dramatically reduced,

All homework must be typed (equations can be handwritten).



See handout on grading for detailed expectations.

Course Outline

Jan. 7, 12 Introduction To The Global Energy Budget (AR 1)Jan. 14 – 28 Properties of Radiation (AR 2-5)F b 2 11 Th l E i i (AR 6)Feb. 2 – 11 Thermal Emission (AR 6)Feb. 16 – 25 Atmospheric Transmission (AR 7 & 9)March 2, 4 Atmospheric Emission (AR 8)Mar. 16 – Apr. 1 Scattering (AR 11 – 14)April 6 – 8 Physics of Rain (from notes and papers)April 13, 15 Project PresentationsApril 13, 15 Project Presentations

AR: A First Course in Atmospheric Radiation by Grant W Petty AR: A First Course in Atmospheric Radiation by Grant W. Petty



Link To Climate

Graphic from Atmospheric Radiation by G. W. Petty

There is an excess of radiative energy input into the tropics, and a deficit input into the high latitudes.

The pole ard transfer of energ res lts m ch of the planets eather



The poleward transfer of energy results much of the planets weather and climate

Radiative Transfer: Relevance to Climate

rising air

sinking air

rising air

The North/South temperature gradient is related to differential heating. Air mass formation is related to surface characteristics, for which the

temperature is linked to radiative heating or cooling.



p g g There are substantial feedbacks between temperature, clouds, and radiation.

Radiative Transfer: Relevance to Weather Short-term weather forecasts (24 hours or less)

Assumed to be adiabatic (radiative transfer is ignored) Thi i ll d ti This is usually a good assumption Exceptions are

localized moisture processes Radiative loss associated with high level clouds Boundary-layer thickness (atmosphere and ocean)

Daytime heating and nighttime cooling.Daytime heating and nighttime cooling. Longer-term weather

More important due to interaction with clouds and the surface. S l f t d l Seasonal forecasts and longer

Absolutely critical



Relevance to Remote Sensing Remote sensing almost always uses electromagnetic radiation to transfer

information. We learn a great deal from observing what fraction of radiation (at a We learn a great deal from observing what fraction of radiation (at a

known frequency) is emitted, and what fraction is transmitted. From this information, we infer information about the material that is

emitting scattering or reflecting the electromagnetic radiationemitting, scattering, or reflecting the electromagnetic radiation.



Viewing by different wavelengths

- visible: how reflective to visible EM (clouds, snow cover, vegetation, …)

i d- IR window: temperature (approximately) of the objects (cloud tops, SST, …)j ( p , , )

- IR vapor: water vapor abundance in the atmosphere (mostly at upper level)



Relevance to Cloud Physics Clouds are emitters, absorbers, and scatterers of electromagnetic

radiation. The scattering is a very strong function of the size distribution of water The scattering is a very strong function of the size distribution of water

droplets or types of ice crystals. Consequently, electromagnetic radiation can be used to determine a

great deal of information regarding cloudsgreat deal of information regarding clouds. Clouds are a major player in a planet’s climatology.

Hydrological properties Radiative properties



Documents

MET4450 & MET5451 Atmospheric Physics II and …coaps.fsu.edu/pub/bourassa/Ali/rad_tran/Introduction.pdf · MET4450 & MET5451 Atmospheric Physics II and Advanced Atmospheric Met