# Presentation: 830617

## Aerosol optical properties measured from aircraft, satellites and the ground during ARCTAS - their relationship to aerosol chemistry and smoke type 

- Yohei Shinozuka*, Jens Redemann, John Livingston, Phil Russell, Roy Johnson, S Ramachandran (NASA Ames),
- Tony Clarke, Cameron McNaughton, Steffen Freitag, Steve Howell, Volodia Kapustin, Vera Brekhovskikh (University of Hawai’i),
- Brent Holben, Norm O'Neill, Bruce McArthur and Alain Royer (AERONET)
- *yohei@hawaii.edu

## In this talk...

**Consistency check** among the P-3 aircraft, ground and satellite observations of spectral aerosol optical depth (AOD)
- Optical characterization of **aerosol composition and smoke type**

## CONSISTENCY CHECK

**CONSISTENCY CHECK**

- AATS-14

*See also HSRL talk.*

- 350   (Surface)

- AOD below P-3:
- 0.005 (150 m * 30.5 Mm-1)

- AOD above P-3 (measured with AATS-14):
- 0.033

- 500

- Layer AOD over aircraft altitudes (500 – 6250 m GPS) : 0.201 at 550 nm

- PRELIMINARY DATA
- Clarke, McNaughton, Freitag, Howell et al.

## HiGEAR layer AOD was typically within 10% + 0.02 of the AATS’s for the 35 spiral vertical profiles with altitude gain/loss greater than 1 km under clear sky with AATS and HiGEAR instruments running.

- HiGEAR layer AOD was typically within 10% + 0.02 of the AATS’s for the 35 spiral vertical profiles with altitude gain/loss greater than 1 km under clear sky with AATS and HiGEAR instruments running.

- PRELIMINARY

- +10% + 0.02
- 1:1 agreement
- -10% - 0.02

## Time = 192.8937

- HiGEAR Dry Scattering 4000 Mm-1 at 550 nm, AATS AOD 2.5 at 519 nm in the smoke.
- The high spatial variability prevented agreement between AATS and HiGEAR.

- 21:27                                                    21:37

- Marker size proportional to dry scattering

- Camsell & Viking fires north of Lake Athabasca

## P-3 and AERONET AODs agreed within 0 (excellent!) – 0.02 (good) during 3 fly-over events, at all wavelengths but 1.6 um.

- PEARL at Eureka

- Saturn Island off Vancouver

- Fort McMurray

- AERONET PIs: Holben, O'Neill, McArthur and Royer

- P-3 and AERONET AODs agreed within 0 (excellent!) – 0.02 (good) during 3 fly-over events, at all wavelengths but 1.6 um.

## MODIS

- 660 550 470 nm

- 1:1

- -15% - 0.05

- +15% + 0.05

- MODIS 3-km resolution product from Remer and Mattoo.

- (HiGEAR extinction * radar altitude)

- MODIS underestimated the AOD in some pixels.

## MISR

- Many more validation opportunities with MODIS, MISR, OMI and CALIPSO are being looked into. See Redemann’s talk and poster.

## AEROSOL COMPOSITION AND SMOKE TYPE

**AEROSOL COMPOSITION AND SMOKE TYPE**

## Dark smoke from flaming fires

- White smoke from smoldering fires

- White smoldering and black flaming identified based on Tony Clarke’s flight report.

## Characterization of smoke types and age with the wavelength dependence of scattering and SSA

- Dark smoke from flaming fires

- White smoke from smoldering fires

**Aerosol evolution in downwind transport?**

- Smoke after evolution, or pollution from other sources? To be investigated.

## Summary

- AATS and HiGEAR layer AODs typically agreed within 10% + 0.02.
- Smoke can prevent AOD agreement.
- P-3 and AERONET AODs agreed within 0 – 0.02 for all visible wavelengths for 3 of the fly-over events.
- Comparison with satellite observations is in progress.
- Smoke type and age may be characterized by the wavelength dependence of scattering and SSA .