ADIENT WP3.2 ADIENT WP3.2 Observational determination of the impact of anthropogenic pollution...
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Transcript of ADIENT WP3.2 ADIENT WP3.2 Observational determination of the impact of anthropogenic pollution...
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 Aims/Approach
Assessing the Radiative Impact of anthropogenic pollution aerosol on the TOA radiation budget
Satellite derived: ττ & reflected SWFSWF
brdbnd Rad. / mult. CHN IMG
SWSWLL↑↑
(CERES / MODIS Christopher and Zhang , 2004)
(CERES / VIRS Loeb and Kato, 2002 )
Conversion
Scene Identification procedure
Approach:Approach:
Present Study: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 productsGERB HR products 15 mins
10 x 10 km
Scene Identification procedure
reflected SWLSWL
τ 1 .6
τ 0 .8
τ 0 .6
narrow 2 bdbnd
(R)(R)
Objectives Objectives (11/2009)
D3.2.1D3.2.1 : ‘Maps of Geostationary Earth Radiation Budget (GERB) aerosol scene identification available on the ADIENT website’
D3.2.2D3.2.2 : ‘New aerosol anisotropy factors (R) for anthropogenic aerosol through combined analysis of aircraft /satellite observations’
α) Maps of : i. GERB HR τ1.6, τ0.8 and τ0.6
ii. α = f (τ1.6, τ0.6) & α = f (τ0.8, τ0.6)
iii. GERB HR SWL and SWF
iv. R = f (SWL, SWF)
D3.2.1D3.2.1 : ‘Maps of Geostationary Earth Radiation Budget (GERB) aerosol scene identification available on the ADIENT website’
Work thus farWork thus far
β) Compile and plot data-series of the above data along the track of each flight
FLT DATE TAKEOFF LANDING PROJECTb333 12/13/07 10:45 15:45 ADIENTb334 12/18/07 11:00 16:00 VISURBb335 12/19/07 11:00 16:00 ADIENTb355 04/02/08 12:00 16:00 ADIENTb356 04/10/08 10:00 16:00 ADIENTb357 04/16/08 10:45 18:30 ADIENTb401 09/18/08 14:00 18:00 ADIENTb402 09/19/08 10:00 15:00 ADIENTb404 09/23/08 10:00 15:00 ADIENTb406 09/25/08 10:00 15:30 ADIENT
B356B356
10:56
11:11
11:41
11:56
12:11
12:26
12:56
15:26
j
iij
j
i
ln
ln
12:11
12:26
F
LR
π
12:26
B355B35504/200804/2008
B356B35604/200804/2008
B357B35704/200804/2008
B402B40209/200809/2008
B356B35604/200804/2008
B355B35504/200804/2008
B357B35704/200804/2008
B402B40209/200809/2008
Future Work Future Work
D3.2.2D3.2.2 : ‘New aerosol anisotropy factors (R) for anthropogenic aerosol through combined analysis of aircraft /satellite observations’
SWFSWF• SWLSWL↑↑
Conversion
),(),(
ατF
LατR
scene,geomety, viewing scene,geomety, viewingocean
There is no specific aerosol treatment in the GERB processing chain.
i. CERES correction code (Brindley and Russell, 2008)
ii. Empirical ADMs = f(Vwind, geometry, τ, n) (Zhang and
Christopher, 2005)
• Implementation of R effect in the GERB Implementation of R effect in the GERB conversion chain 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, 1659-1680.
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.
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.
VIS 0.6VIS 0.8
IR 8.7 Earth Imaging Principle