Top Banner
Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. • Prof. Arnott (Physics) and 25 faculty members from the Division of Atmospheric Sciences at the Desert Research Institute participate in the program. • The programs have a very strong research emphasis. • Areas of emphasis: Atmospheric Physics , solar and infrared radiation transfer, cloud microphysics, instrumentation development. Solar and wind energy. Atmospheric Chemistry , trace detetction of organic and inorganic air pollutants; Pollutant transport and evolution. Meteorology and Climatology , Western regional climate center, Center for Climate and Fire Applications,
19

Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Jan 16, 2016

Download

Documents

Matilda Barton
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Atmospheric Science Programs and Research• UNR has both undergrad and grad programs in Atmospheric Science.

• Prof. Arnott (Physics) and 25 faculty members from the Division of Atmospheric Sciences at the Desert Research Institute participate in the program.

• The programs have a very strong research emphasis.

• Areas of emphasis:– Atmospheric Physics, solar and infrared radiation transfer, cloud microphysics, instrumentation development. Solar and wind energy.– Atmospheric Chemistry, trace detetction of organic and inorganic air pollutants; Pollutant transport and evolution.– Meteorology and Climatology, Western regional climate center, Center for Climate and Fire Applications, local, regional, and global climate change.

Page 2: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Students of ATMS 360, Atmospheric Instrumentation, measuring the downwelling infrared radiation from the atmosphere. The strong

emission around 650 cm-1 is due to CO2 in the

atmosphere.

Page 3: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Places We Work

Page 4: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Burning Brazilian Forest near Ji Parana: PyrocumulusClimate impacts of large scale biomass burning aerosol.

Courtesy Michael Welling, SMOCC 2002, Sept 25

Page 5: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Pancakes Layers of Smoke from Siberian Forest Fires Observed Over North Central Oklahoma, 27 May 2003(Photo by Roy Woods, the CIRPAS Twin Otter Co-pilot)

Arnott, W. P., J. W. Walker, H. Moosmüller, R. A. Elleman, H. H. Jonsson, G. Buzorius, W. C. Conant, R. C. Flagan, and J. H. Seinfeld, (2006). Photoacoustic insight for aerosol light absorption aloft from meteorological aircraft and comparison with particle soot absorption photometer measurements: DOE Southern Great Plains climate research facility and coastal stratocumulus imposed perturbation experiments. Journal of Geophysical Research 111, D05S02, doi:10.1029/2005JD005964.

0.5 to 1 km thick

Page 6: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Example of a morning when the Mexico City Plume Goes South to Popocatepetl Volcano, hiding it.

near forward scattering by particlessca = 30 degrees

r << r ~ r >>

Page 7: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Dynamometer Vehicle Tests: How much does your car pollute?

Page 8: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Jet Exhaust: SERDP 2002, North Island CA

Page 9: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

The Crew In Action, 1,600’ underground in a Nevada

Gold Mine…

Undergrad physics major Ian Arnold, and Arnott

Page 10: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Vehicle Used for the Tests

Photograph showing the haul truck in operation along with the air quality samplers. The photoacoustic EC instrument is housed in the vanilla colored box on the equipment rack and the Dustrak nephelometers are in blue. The filter samplers are up on the wall immediately to the right of the blue writing on the wall. The sample inlet for the photoacoustic instrument can be seen draped over the top of the laptop computer.

Page 11: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Example of our Atmospheric Research: Optics of woodsmoke from different

sources

Page 12: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

The Fire Science Laboratory in Missoula Montana

Page 13: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

DUAL WAVELENGTH PHOTOACOUSTIC INSTRUMENT, PATENTED AND LICENSED TO DMT, BOULDER CO.

Measurement of Light Absorption, Scattering, and Extinction with a Single Instrument

Page 14: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Wood Smoke Particles by Rajan Chakrabarty, DRI/UNR Graduate Student

Fire Science Laboratory, Missoula Montana.

Page 15: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

• Instrumentation sampling wood smoke during FLAME Chamber burns

• Photoacoustic instruments

UNR AND COLORADO STATE

UNIVERSITY STUDENTS AND

FACULTY

Page 16: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Fuel Fuel Characterization Burn (Label)

Ponderosa Pine, dried needles and sticks conifer (pine) A, C

Lodge pole Pine, needles and twigs conifer (pine) L

Utah Juniper, foliage and sticks conifer (pine) I

Southern Pine, needles conifer (pine) P

Ponderosa Pine duff duff (pine) F

Alaskan Duff (feather moss) duff G

Southern California Manzanita flowering shrub H

Southern California Chamise flowering shrub B, D, N

Southeastern Wax Myrtle flowering shrub O

Utah Sage and Rabbitbrush, foliage and sticks flowering shrub J

Southern California Ceanothus flowering shrub S

Southeastern US Palmetto, leaves miscellaneous flowering plant R

Asian Rice Straw (Taiwan) miscellaneous flowering plant E

Puerto Rico Fern fern M

(Puerto Rico mixed woods) Q

(Lignin) K

Chamise

Rice Straw

Ponderosa Pine

The fuels burned

Page 17: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Optical Parameters for Analysis of Absorption and Scattering

• Single Scattering Albedo, ω – Ratio of Scattering to Extinction

– Dark, absorbing aerosol: ω<0.5• Diesel Soot: ω(550 nm)=0.3

– “White”, highly scattering aerosol: ω>0.85• Rice Straw fuel: ω(405 nm)=0.88

Page 18: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

Optical Parameters for Analysis of Absorption and Scattering

• Ångström exponent of absorption, b

babs β 1∝⎟⎠⎞⎜

⎝⎛

⎟⎠⎞⎜

⎝⎛

=⎟⎠⎞⎜

⎝⎛

2

1

2

1

2

1

ln

)()(ln

λλ

λβλβ

λλ abs

abs

b

– Common assumption of Ångström exponent model: for Black Carbon b=1

– Diesel Soot: b=1

– Rice Straw: b(405/870)=2.8

Page 19: Atmospheric Science Programs and Research UNR has both undergrad and grad programs in Atmospheric Science. Prof. Arnott (Physics) and 25 faculty members.

W. P. Arnott, AAAR tutorial, Sept. 2007 19

Ångström Exponent of Absorbtion vs.Single Scattering Albedo at 405 nm

0

0.5

1

1.5

2

2.5

3

3.5

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1ù (405 nm)

Ponderosa Pine,mixed fuels

Chamise

Rice Straw

Ponderosa Pine Duff

Alaskan Duff

So. CalifornianManzanita

Sage & Rabbitbrush

Lodgepole Pine,mixed fuels

Utah Juniper,foilage/twigs

Puerto Rico Fern

Wax Myrtle,branches/foilage

Southern Pine,needles

Palmetto

Ceanothus

b(405/870)

Flowering Shrubs: Chamise, Manzanita, Sage & Rabbitbrush

Fern (Puerto Rico), Rice Straw & Ceanothus (a flowering shrub)

Duff: Alaskan & Ponderosa Pine Duff

Pines: Southern Pine, Lodgepole Pine, & Ponderosa Pine

ω