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

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Presentation transcript:

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 M c Naughton, Steffen Freitag, Steve Howell, Volodia Kapustin, Vera Brekhovskikh (University of Hawai’i), Brent Holben, Norm O'Neill, Bruce McArthur and Alain Royer (AERONET)

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 AATS-14

An example of extinction profile See also HSRL talk. 350 (Surface) AOD below P-3: (150 m * 30.5 Mm -1 ) AOD above P-3 (measured with AATS-14): Layer AOD over aircraft altitudes (500 – 6250 m GPS) : at 550 nm PRELIMINARY DATA Clarke, M c Naughton, Freitag, Howell et al.

HiGEAR layer AOD was typically within 10% 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% :1 agreement -10%

Time = 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

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.

nm 1:1 -15% % MODIS 3-km resolution product from Remer and Mattoo. (HiGEAR extinction * radar altitude) MODIS 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

Dark smoke from flaming fires White smoke from smoldering fires White smoldering and black flaming identified based on Tony Clarke’s flight report.

Dark smoke from flaming fires White smoke from smoldering fires Aerosol evolution in downwind transport? Characterization of smoke types and age with the wavelength dependence of scattering and SSA Smoke after evolution, or pollution from other sources? To be investigated.

Summary AATS and HiGEAR layer AODs typically agreed within 10% 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.