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HIGEAR. Steve Howell, Yohei Shinozuka, and Tony Clarke University of Hawaii. Area, mm^ 2 /cm^3. TDMA. Don Collins and Jason Tomlinson Texas A&M. IMPEX C130 flight 4 (Seattle local 3). Loop 9. Aerosol is composed of a mixture of sulfate and possibly dust. Loop 10. Loop 11. Loop 9.

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Presentation Transcript
higear
HIGEAR

Steve Howell, Yohei Shinozuka, and Tony Clarke

University of Hawaii

slide6
TDMA

Don Collins and Jason Tomlinson

Texas A&M

slide9

Loop 9

Aerosol is composed of a mixture of sulfate and possibly dust

Loop 10

Loop 11

slide10

Loop 9

Aitken mode increases in concentration as the C-130 enters in the plume

Loop 11

Loop 10

organic sampler
Organic Sampler

Greg Roberts

slide12

Aerosol layers transported as three dimensional rivers of aerosol.

  • Rapid changes in aerosol size distribution and chemistry impact CCN concentrations

Aerosol transport and CCN

clouds

slide13

Long-range transport above 3500 m

    • detailed aerosol structure
    • dust / pollution ??
  • Regional source within mixed layer probably new particle formation
  • Atmospheric mixing necessary for long-range transport to serve as CCN

Aerosol transport and CCN

clouds

dude where s my sulfate

Dude, where’s my sulfate?

Rick Peltier, PILS, Georgia Tech

Ed Dunlea, AMS, Univ. of Colorado

rf05 ams so 4
RF05 – AMS SO4

View of flight track from the South

rf05 ams org
RF05 – AMS Org

View of flight track from the South

close up on asian plumes
Close up on Asian plumes

Good correlation of SO4 with NOy again

First flight with organics visible in Asian plumes

slide20

Ion composition mainly sulfate and ammonium

WSOC instrument problems during flight at ~1800 – no data available.

Does not include unmeasured species (e.g. soot, OC)

Aerosol density estimated (1.5)

Most aerosol neutral charge balance (although a few deviations from 0)

slide21
CO

Teresa Campos

NCAR

o3 nox noy
O3, NOx, NOy

Andy Weinheimer and David Knapp

NCAR

slide31
PANs

Frank Flocke

NCAR

slide37
CH2O

Alan Fried, Jim Walega, Dirk Richter, and Petter Weibring

NCAR

caltech cims
Caltech CIMS

David McCabe and John Crounse

impex science meeting

IMPEX Science Meeting

PTRMS

Thomas Karl, Sou Matsunaga, Kolby Jardine and Alex Guenther

VOCs measured targeted IMPEX:

BTX: benzene, toluene, C8, C9

Acetonitrile (biomass burning)

OVOCs: Methanol, (Acetaldehyde), Acetone/Propanal, C4 (MEK+butanal), C5 and C6 carbonyls, Acetic Acid/Glycolaldehyde, hydroxyacetone

slide46

Acetonitrile (biomass burning marker) and Benzene are not correlated in Asian plume. OVOCs slightly enhanced

slide48

srf4

srf3

SRF3 and SRF 4 Benzene

ppbv

ncar cims
NCAR-CIMS

Lee Mauldin and Rebecca Anderson

slide56
SAFS

Sam Hall

slide61

Real-time

  • UW-Hybrid Dynamical Core (2x2) 0-60km
  • Online unified (strat/trop) chemistry
  • Real-time OMI column ozone assimilation
  • Real-time ecosystem based wild fire emissions (MODIS firecounts/Haines index intensity)
  • Real-time verification with US EPA AIRNow surface ozone
  • 24hr assimilation cycle followed by 96hr forecast cycle
  • Results posted by 9:30am EST

HTTP://rossby.larc.nasa.gov/RAQMS

Seattle field representatives:

R. Bradley Pierce

Dave Kuhl

slide62

“Rapid Synthesis of 04/28/06 C130 Flight”

C130 Flight Track 04/28/06

  • Model verification
  • (transport, emissions)
  • Characterization of
  • large-scale background
  • Mixing Diagnostics

Arctic airmass

Asian influence

Aged airmass

Tropical influence

slide63

C130 CO provided by Teresa Campos

C130

Asian influence

low by factor of

2-3 (15ppb vs 40ppb)

  • RAQMS underestimates Asian
  • emissions (which contribute significantly to Arctic background) consequently Arctic background is underestimated by 30ppbv.
  • RAQMS real-time biomass emissions appear reasonable, so Asian anthropogenic emissions must be low (consistent with RAQMS/GMAO comparisons)

30ppb low bias

(Arctic Background)

10ppb low bias

(Tropical Background)

Biomass/

Tropical

Asian

Biomass/

Tropical

Asian

Arctic

Background

RAQMS

Biomass Plume

(good amplitude,

error in placement)

120ppb

?

slide64

C130 O3 data provided by Andrew Weinheimer

C130

  • Generally good agreement between observed and predicted O3 in free troposphere.
  • 10-20ppb overestimate in BL. (Halogen chemistry?)

RAQMS

Overestimate

slide65

Generally good agreement between observed and predicted background

  • NOy in free troposphere.
  • 0.2ppb overestimate in BL. (tend to overestimate marine HNO3 due to lack of sea salt aerosols)
slide66

CO/O3 correlation

Mixing

“Fresh” pollution

Strat

Arctic Background

Background

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