ADIENT WP3.2 ADIENT WP3.2 Observational determination of the impact of anthropogenic pollution aerosol on the TOA radiation budget and its sensitivity.

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Presentation transcript:

ADIENT WP3.2 ADIENT WP3.2 Observational determination of the impact of anthropogenic pollution aerosol on the TOA radiation budget and its sensitivity to the aerosol properties Alexandros P. Georgiadis & Helen E. Brindley

Aims/Approach Assessing the Radiative Impact of anthropogenic pollution aerosol on the TOA radiation budget τ SWF Satellite derived: τ & reflected SWF brdbnd Rad. / mult. CHN IMG SWL SWL (CERES / MODIS Christopher and Zhang, 2004 ) (CERES / VIRS Loeb and Kato, 2002 ) Conversion Scene Identification procedure Approach: Present Study: Similar approach brdbnd Rad. mult. CHN IMG : GERB 15 mins 50 x 50 km : SEVIRI - 12 Chn 15 mins 3X3 Km GERB HR products 15 mins 10 x 10 km Scene Identification procedure SWL reflected SWL τ 1.6 τ 0.8 τ 0.6 narrow 2 bdbnd (R)

Objectives Objectives (11/2009) D3.2.1 D3.2.1 : Maps of Geostationary Earth Radiation Budget (GERB) aerosol scene identification available on the ADIENT website D3.2.2 D3.2.2 : New aerosol anisotropy factors (R) for anthropogenic aerosol through combined analysis of aircraft /satellite observations

α) Maps of : i. GERB HR τ 1.6, τ 0.8 and τ 0.6 ii. α = f (τ 1.6, τ 0.6 ) & α = f (τ 0.8, τ 0.6 ) iii. GERB HR SWL and SWF iv. R = f (SWL, SWF) D3.2.1 D3.2.1 : Maps of Geostationary Earth Radiation Budget (GERB) aerosol scene identification available on the ADIENT website Work thus far β) Compile and plot data-series of the above data along the track of each flight FLTDATETAKEOFFLANDINGPROJECT b33312/13/0710:4515:45ADIENT b33412/18/0711:0016:00VISURB b33512/19/0711:0016:00ADIENT b35504/02/0812:0016:00ADIENT b35604/10/0810:0016:00ADIENT b35704/16/0810:4518:30ADIENT b40109/18/0814:0018:00ADIENT b40209/19/0810:0015:00ADIENT b40409/23/0810:0015:00ADIENT b40609/25/0810:0015:30ADIENT

B356 10:56 11:11 11:41 11:56 12:11 12:26 12:56 15:26

12:11 12:26

B35504/2008B35604/2008 B35704/2008 B40209/2008

B35604/2008B35504/2008B35704/2008 B40209/2008

Future Work D3.2.2 D3.2.2 : New aerosol anisotropy factors (R) for anthropogenic aerosol through combined analysis of aircraft /satellite observationsSWF SWL SWL Conversion There is no specific aerosol treatment in the GERB processing chain. i. CERES correction code ( Brindley and Russell, 2008 ) ii. Empirical ADMs = f(V wind, geometry, τ, n) ( Zhang and Christopher, 2005 ) Implementation of R effect in the GERB conversion chain Implementation of R effect in the GERB conversion chain iii. Develop Theoretical ADMs similar to the ones by Brindley and Russell (2008) using the aerosol properties from the FAAM flights.

References : Brindley, H.E. and J.E. Russell, 2008: Assessing the Errors in shortwave radiative fluxes inferred from the Geostationary Earth Radiation Budget (GERB) Instrument in the Presence of Dust Aerosol. J. Appl. Meteor., 47, Brindley, H.E. and A. Ignatov, 2006: Retrieval of mineral aerosol optical depth and size information from Meteosat Second Generation SEVIRI solar reflectances bands. Remote Sens. Environ., 102, Christopher, S.A. and J. Zhang, 2004: Cloud free shortwave aerosol radiative effect over oceans: Strategies for identifying anthropogenic forcing from Terra satellite measurements. Geophys. Res. Lett., 31, L Loeb, N.G. and S. Kato, 2002: Top-of-Atmosphere Direct Radiative Effect of aerosols over the Tropical Oceans from the Clouds and the Earths Radiant Energy System (CERES) satellite instrument. J. Climate, 15,

VIS 0.6VIS 0.8 IR 8.7 Earth Imaging Principle