1 / 12

Harmonisation of stratospheric NO 2 /O 3 column data products

Harmonisation of stratospheric NO 2 /O 3 column data products. F. Hendrick and M. Van Roozendael. Belgian Institute for Space Aeronomy (IASB-BIRA), Brussels, Belgium. + NDACC UV-VIS Working Group. NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1. Context.

anakin
Télécharger la présentation

Harmonisation of stratospheric NO 2 /O 3 column data products

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Harmonisation of stratospheric NO2/O3 column data products F. Hendrick and M. Van Roozendael Belgian Institute for Space Aeronomy (IASB-BIRA), Brussels, Belgium + NDACC UV-VIS Working Group NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1

  2. Context • NDACC UV-vis Working Group meeting at British Antarctic Survey in November 2007: • « There is a need to harmonize stratospheric O3 and NO2 column retrievals » • Main reasons: • Lack of consistency between the stations due to the use of different DOAS settings (e.g., NO2 XS at different temperature) and AMFs • Satellite groups encountered problems in the validation of their data using the NDACC UV-vis database, e.g. Wetzel et al., ACP, 2007 for the validation of MIPAS NO2 NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 2

  3. Harmonisation of O3 column retrieval: 1. DOAS settings NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 3

  4. Harmonisation of O3 column retrieval: 2. O3 AMF look-up tables • TOMS V8 (TV8) ozone and temperature profile climatology (Bhartia, 2004; McPeters et al., 2007) + total O3 column dependence • LUTs, AMF extraction routine as well as DOAS settings publicly available at: http://uv-vis.aeronomie.be/groundbased NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 4

  5. V1 V2 Corr temp Validation of new retrieval settings Comparison to: Dobson at OHP (44°N, 5.5°E) Brewer at Sodankyla (67°N, 27°E) Amplitude of Dobson-SAOZ seasonal variation: V1 6.9% SAOZ Yearly AMF V2 3.2% SAOZ LUT AMF Bias / Std Dev after temperature correction: -1.2% ± 3.7% Amplitude of Brewer-SAOZ seasonal variation: V1 6.5% SAOZ Yearly AMF V2 2.4% SAOZ LUT AMF Bias / Std Dev after temperature correction: 1.9% ± 3.2% NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 5

  6. Impact on the difference satellites - SAOZ V1 Yearly AMF V2 LUT AMF • Reduced amplitude of seasonal variation • Reduced bias More details on the recommendation and comparison studies in Hendrick et al., ACP, 2011 NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 6

  7. Harmonisation of NO2 column retrieval: 1. DOAS settings NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 7

  8. Harmonisation of NO2 column retrieval: 2. Stratospheric NO2 AMF LUTs Lambert et al.’s climatology consists of a Fourier harmonic decomposition of UARS HALOE v19 and SPOT-4 POAM-III v2 NO2 profile data records. • LUTs, AMF extraction routine as well as DOAS settings publicly available at: http://uv-vis.aeronomie.be/groundbased NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 8

  9. NO2 questionnaire (1) NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 9

  10. NO2 questionnaire (2) NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 10

  11. 0 0 -5% -5% -10% -10% Impact of aerosols NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 11

  12. GOME-2 - SAOZ SCIAMACHY-SAOZ GOME-SAOZ OMI-SAOZ Satellites (TEMIS) - SAOZ NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 12

More Related