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Aerosol Climate Time Series Evaluation in ESA Aerosol_cci

This study evaluates the aerosol climate time series data from the ESA Aerosol_cci project, focusing on aerosol optical depth, extinction profile, layer height, and aerosol index. The study identifies areas for improvement and provides validated data for climate studies.

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Aerosol Climate Time Series Evaluation in ESA Aerosol_cci

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  1. Aerosol Climate Time Series Evaluation in ESA Aerosol_cci Thomas Popp, Gerrit de Leeuw, Simon Pinnock, Miriam Kosmale, Larisa Sogachewa, Pekka Kolmonen, Gareth Thomas, Adam Povey, Caroline Poulson, Peter North, Andreas Heckel, Lars Klüser, Virginie Capelle, Lieven Clarisse, Sophie Vandenbussche, Oleg Dubovik, Pavel Litvinov, Christine Bingen, Charles Robert, Jacques Descloitres, Marco Vountas, Luca Lelli, Linlu Mei, Stefan Kinne, Michael Schulz, Jan Griesfeller, Kerstin Stebel, Christoph Brühl, David Neubauer, Pepijn Veefkind, Gijsbert Tilstra, Yong Xue, Yves Govaert, Jürgen Fischer, Martin de Graaf

  2. Aerosol_ccievolutioncycle 4. independent validation

  3. Aerosol_cci Phase 2 New products 2015

  4. Requiredaerosoldataproducts • GCOS satellite supplement 2011 (GCOS-154) • AOD accuracy requirement: max (0.03; 10%) • Extinction profile • Layer height • Absorption AOD / SSA • Model users (Aerosol_cci URD 2014) • Fine mode AOD, dust AOD • Aerosol index (AOD * Angström exponent)

  5. Needs forimprovementidentified after Phase 1 • AATSR / ATSR-2 • Improvement for AOD > 0.2 • Cloud masking / coverage • Consistent uncertainties • GOMOS • Higher temporal resolution • Higher coverage (weak stars)

  6. Lv3 AOD vs AERONET2008 (3 AATSR, MODIS)

  7. 3 ATSR time seriesMODIS as reference ADV and SU are overall similar, with ORAC closer to MODIS. Regionally larger differences.ATSR-2 differences larger: under study

  8. AATSR, 2002-2012ORAC v3.02 (L2. Land)

  9. AATSR, 2002-2012ADV v2.30 (L2. Land)

  10. AATSR, 2002-2012Swansea v4.21 (L2. Land)

  11. Growing confidence inFine mode AOD (land+ocean, SU AATSR) Dust AOD Total AOD Fine mode AOD

  12. Growing confidence inFine mode AOD (land+ocean, 3x AATSR) SU ADV ORAC

  13. ocean land AATSR (SU) Uncertainties old uncertainty „true“ error new

  14. ocean land AATSR (3 algo) Uncertainties ADV uncertainty „true“ error ORAC SU

  15. AATSR ensemble ADV SU ORAC ensemble

  16. AATSR ensemble all points only common points

  17. Annual Mean Dust AOD 10µm 2013 IMARS LMD MAPIR ULB

  18. L3 Evaluation with AERONET: Daily SDA Coarse Mode AOD0.55µm MAPIR LMD ULB IMARS • AERONET SDA coarse mode AOD at „dusty“ sites • comparison of daily 1° averages • validation complex: no 10µm reference, conversion to 550nm, different sampling

  19. GOMOS / stratosphere GOMOS time series version GOMOS_AERGOM.v.2.14

  20. Temporal resolution New time series with adapted grid (v2.15) (5°lat x 60° lon x 1 km altitude x 5 days) V2.19 better weak stars treatment -> better coverage 78 lidar profile pairs

  21. AAI regional time series

  22. Conclusions • Updated validated full mission time series available • 3x ATSR AOD 17 year • GOMOS stratospheric extinction 10 year • New datasets added / round robin conducted • IASI mineral dust • Complementary datasets • One more evolution cycle in 2015/2016 • Test AATSR ensembles • Further round robin exercises started • AAOD (AAI, glint, mixing) • layer height (O2A-band, IASI spectra)

  23. Cross ECV interactions • In this session • GHG / O3 -> explore aerosol correction in their retrieval • Fire -> emission source of aerosol -> quantify surce term (mass fluxes, emission height) • Other ECVs • Clouds -> aerosol-clioud interaction studies (ACPC) • OC, LC -> consistent surface model / aerosol model

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