agacc ii: wp3: aerosol properties and radiative forcing at uccle veerle de bock royal meteorological...
DESCRIPTION
Task Brewer SSA retrieval Task 3.1 Aerosol algorithms improvementTRANSCRIPT
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AGACC II:WP3: Aerosol properties and
radiative forcing at Uccle
Veerle De BockRoyal Meteorological Institute of Belgium
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Work Package 3: AEROSOL
Task 3.1: Aerosol algorithms improvementTask 3.2: Aerosol measurements at UccleTask 3.3: Aerosol data interpretation
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• Task 3.1.2. Brewer SSA retrieval
Task 3.1 Aerosol algorithms improvement
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• Sensitivity of the SSA retrieval algorithm to the input parameters:
Task 3.1 Aerosol algorithms improvement
Min difference Max difference Min % difference Max % difference
Intensity + 5% 0,02 0,22 2,20% 181,82%
Intensity - 5% -0,03 -0,25 -3,30% -91,82%
Ozone + 5% 0,01 0,16 1,10% 103,23%
Ozone – 5% 0,01 -0,14 1,49% -90,91%
AOD + 0,08 0,01 0,41 1,10% 336,91%
AOD – 0,08 -0,01 -0,45 -1,01% -92,63%
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• Task 3.2.1 Routine Brewer operation• Task 3.2.2. Lidar measurements
Task 3.2 Aerosol measurements at Uccle
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• Data from both Brewer instruments is continuously stored and regularly checked=> submitted to WOUDC database
• AOD time series kept up to date• Analysis of 21 year time series of
simultaneous UV, global radiation, ozone and AOD measurements => paper to be submitted
Task 3.2.1 Routine Brewer operation
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• coherent network of European Brewer Spectrophotometer monitoring stations
• harmonize operations + develop approaches, practices and protocols to achieve consistency in quality control, quality assurance and coordinated operations
• WG 1: instrument characterization and calibration• WG 2: algorithms development• WG 3: network governance and data management• WG 4: users, public outreach and applications
COST ES 1207 - EUBREWNET
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• MLH algorithm=> validation by comparison with:
° radiosoundings° ECMWF° ALARO7
• Quality control flags
Task 3.2.2 Lidar measurements
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• EUMETNET: E-PROFILE=> operational LIDAR ceilometer network=> exchange of backscatter profiles in a standard format=> archive of communicated data and metadata
• COST: TOPROF (Towards operational ground based profiling with ceilometers, doppler lidars and microwave radiometers for improving weather forecasts)
=> coordinated operation of ceilometers in Europe=> quality controlled + calibrated observations in near real time=> technical and scientific background for E-PROFILE
Task 3.2.2 Lidar
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– Task 3.3.1: Comprehensive data set of aerosol optical properties
– Task 3.3.2: Aerosol modeling with Chimere and OPAC
– Task 3.3.3: Aerosol sources from backtrajectories
Task 3.3 Aerosol data interpretation
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• Collaboration with BIRA Comparison of cloud screening Comparison of total AOD
Task 3.3.1 Comprehensive aerosol data set
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CHIMERE (µg/m³) OPAC (particles/cm³)BC Soot
Dust Mineral (coarse mode)NH3 + H2SO4 + HNO3 Soluble
OC + PPM + SOA InsolubleSalt Seasalt (coarse mode)
Task 3.3.2 Aerosol modeling with Chimere and OPAC
Input parameters:MLH: from soundings or ALADIN model outputRH: from synoptical station at Uccle
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Task 3.3.2 Aerosol modeling with Chimere and OPAC
Modeled Measured CorrelationAOD OPAC 300nm Brewer 306nm 0,34
OPAC 350nm Brewer 340nm 0,41OPAC 500nm Cimel 500nm 0,54
SSA OPAC 450nm Cimel 440nm 0,04
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Task 3.3.2 Aerosol modeling with Chimere and OPAC
OPAC SSA 350nm OPAC AOD 350nm
RH class 0,68 0,08
MLH -0,34 0,36
Seasalt -0,39 0,27
Water soluble 0,39 0,59
Mineral -0,27 0,29
Insoluble -0,03 0,00
Soot -0,60 -0,03
Correlation between modeled SSA/AOD and input parameters:
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Task 3.3.3 Aerosol sources from backtrajectories
• Trajectories between 1990 and 2010: =>12 clusters
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Task 3.3.3 Aerosol sources from backtrajectories
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• Cloudscreening for Brewer AOD measurements• Continuous Brewer data (data submission, data
analysis, COST)• Continuous Lidar data (backscatter profiles, MLH,
cloud base height, COST, EUMETNET)• CHIMERE + OPAC• First results of backtrajectory analysis
To conclude: what have we done so far?
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• Calibration of Brewer instruments • Installation of nephelometer • Installation of 3 new lidars: Zeebrugge,
Diepenbeek, Humain• Continue collaboration with BIRA• Fine-tuning OPAC • Continue backtrajectory analysis
To conclude: future planning
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Thank you for your attention!