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Assessing Anthropogenic Pollution Aerosol Impact on TOA Radiation Budget

This study focuses on determining the impact of anthropogenic pollution aerosol on the Top of Atmosphere radiation budget and its sensitivity to aerosol properties. The approach involves satellite-derived data and scene identification procedures to evaluate the radiative impact. The study aims to map geostationary Earth radiation budgets and derive new aerosol anisotropy factors. Future work includes implementing the aerosol effect in the GERB processing chain through corrections and theoretical ADMs. Relevant flights data and references to accurate aerosol data analysis are highlighted.

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Assessing Anthropogenic Pollution Aerosol Impact on TOA Radiation Budget

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  1. 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

  2. Aims/Approach Assessing the Radiative Impact of anthropogenic pollution aerosol on the TOA radiation budget Approach: Satellite derived: τ& reflectedSWF (R) Conversion SWL↑ brdbnd Rad. / mult. CHN IMG Scene Identification procedure (CERES / MODIS Christopher and Zhang , 2004) (CERES / VIRS Loeb and Kato, 2002 ) GERB HR products 15 mins 10 x 10 km Present Study: Similar approach brdbnd Rad. mult. CHN IMG : GERB 15 mins 50 x 50 km reflectedSWL narrow 2 bdbnd τ 1 .6 τ 0 .8 τ 0 .6 : SEVIRI- 12 Chn 15 mins 3X3 Km Scene Identification procedure

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

  4. Work thus far D3.2.1 : ‘Maps of Geostationary Earth Radiation Budget (GERB) aerosol scene identification available on the ADIENT website’ α) Maps of : i. GERB HR τ1.6, τ0.8andτ0.6 ii. α = f (τ1.6, τ0.6) & α = f (τ0.8, τ0.6) iii. GERB HR SWL and SWF iv. R = f (SWL, SWF) FLT DATE TAKEOFF LANDING PROJECT b333 12/13/07 10:45 15:45 ADIENT b334 12/18/07 11:00 16:00 VISURB b335 12/19/07 11:00 16:00 ADIENT b355 04/02/08 12:00 16:00 ADIENT b356 04/10/08 10:00 16:00 ADIENT b357 04/16/08 10:45 18:30 ADIENT b401 09/18/08 14:00 18:00 ADIENT b402 09/19/08 10:00 15:00 ADIENT b404 09/23/08 10:00 15:00 ADIENT b406 09/25/08 10:00 15:30 ADIENT β) Compile and plot data-series of the above data along the track of each flight

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

  6. 12:26 12:11

  7. 12:26

  8. B355 04/2008 B356 04/2008 B357 04/2008 B402 09/2008

  9. B355 04/2008 B356 04/2008 B357 04/2008 B402 09/2008

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

  11. References : 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, 344-363. 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, 1659-1680. 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, L18101. Loeb, N.G. and S. Kato, 2002: Top-of-Atmosphere Direct Radiative Effect of aerosols over the Tropical Oceans from the Clouds and the Earth’s Radiant Energy System (CERES) satellite instrument. J. Climate,15, 1474-1484.

  12. Earth Imaging Principle IR 8.7 VIS 0.8 VIS 0.6

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