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Status of Central European NO 2 products

Status of Central European NO 2 products. Dominik Brunner, Daniel Schaub, Brigitte Buchmann Empa, Swiss Federal Laboratories for Materials Testing and Research Dübendorf, Switzerland Andrea Petritoli Istituto di Scienze dell'Atmosfera e del Clima, ISAC-CNR Bologna, Italy.

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Status of Central European NO 2 products

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  1. Status of Central European NO2 products Dominik Brunner, Daniel Schaub, Brigitte Buchmann Empa, Swiss Federal Laboratories for Materials Testing and Research Dübendorf, Switzerland Andrea Petritoli Istituto di Scienze dell'Atmosfera e del Clima, ISAC-CNR Bologna, Italy

  2. Embedding within TEMIS WP 2.2 Global NO2 product End user Global tropospheric NO2 columns WP 2.3 Regional NO2 product Extract: regional tropospheric NO2 columns Add: Auxiliary data (Meteo, DOAS) + Validation of regional NO2 columns

  3. Overview of products Region of interest (ROI): Alpine Region and Po valley Product 1: Tailored picture covering the ROI Product 2: Data files (ASCII) for users containing NO2 column data (pixel values), cloud flag and cloud parameters

  4. Overview of products Region of interest (ROI): Alpine Region and Po valley • Product 3: • Trajectory calculation* for pixels in ROI (potential source regions) • Trajectory arrival points covering the whole pixel * • - Analysed wind fields from ECMWFat 6 hr temporal and 1° x 1° geographical resolution • 3-D kinematic 4-day backward trajectories calculated with Lagranto (Wernli and Davies, 1997)

  5. Overview of products Region of interest (ROI): Alpine Region and Po valley Product 4: Ground-based DOAS NO2 vertical profiles retrieved at Mt. Cimone and Bologna  Ground-based data in ASCII and images Product 5: Validation (for specific periods) with ground-based measurements and meteorological information Petritoli et al. (2004)

  6. Application examples Example 1: Gridded seasonal or (multi-) annual mean distributions GOME 1996-2003 meanclear sky distribution SCIAMACHY 2003-2005 meanclear sky distribution Schaub et al., ACPD 2007

  7. Application examples Example 2: NOx source region attribution Air pollution in Po valley on 23 June 2003

  8. Application examples Example 2: NOx source region attribution Air pollution in Po valley on 23 June 2003: Origin of air arriving in pollution pixels at different levels 700 hPa 750 hPa 800 hPa 850 hPa 900 hPa 950 hPa

  9. Application examples Example 2: NOx source region attribution Air pollution in Po valley on 23 June 2003: Maps of residence time of column air in PBL NO2 VTC < 15 x 1015 molec/cm2 NO2 VTC > 15 x 1015 molec/cm2 Hatched areas indicate positions of satellite pixels

  10. Application examples Example 2: NOx source region attribution Air pollution in Po valley on 23 June 2003: Maps of residence time of column air in PBL

  11. Application examples Example 3: Validation of GOME vertical tropospheric NO2 columns with ground-based in situ measurements .. for TEMIS GOME tropospheric NO2 columns 1997-2003. Schaub et al. (ACP, 2006) Measurement sites

  12. Status of product availability Website moved to: http://temis.empa.ch Product 1:tailored picture for each overpassGOME: 01/01 1997 – 21/06 2003, SCIA: 01/01 2003 – 17/09 2006 Product 2:ASCII data files (regional NO2 and auxiliary information)GOME: 13/03 1996 – 21/06 2003, SCIA: 07/01 2003 – 30/09 2005 Product 3:Representativity flag and picture of potential source regionsGOME: 1997 SCIA: 01/01 2003 – 31/03 2004 Product 4:Ground-based DOAS NO2 vertical profiles from Mt. Cimone and Bologna (ASCII data file, image) and slant column within the tropospheric layer (46 m - 2165 m asl)2003 Product 5:Validation with ground-based measurements and meteorological information (images and quality flags). Three publications (Petritoli et al., 2003; Schaub et al., 2006, 2007)

  13. Application examples Example 3: Comparison of SCIAMACHY vertical tropospheric NO2 columns with a high resolution NOx emissions inventory .. for TEMIS SCIAMACHY tropospheric NO2 columns 2003-2005. Schaub et al. (ACPD, 2007) NOx emissions inventory SCIA pixel

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