1 / 18

IPCC : CO emissions × 3 for East Asia and India between 2000 and 2100 (scenario A2p)

Intercomparaison du CO mesuré par MOPITT en visée au nadir et par ACE en occultation solaire: complémentarités pour l’étude du transport de la pollution Solène Turquety, Cathy Clerbaux, Kathy Law, Juliette Hadji-Lazaro Service d'Aéronomie, IPSL, Paris, France.

isaac-solomon
Download Presentation

IPCC : CO emissions × 3 for East Asia and India between 2000 and 2100 (scenario A2p)

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. Intercomparaison du CO mesuré par MOPITT en visée au nadir et par ACE en occultation solaire: complémentarités pour l’étude du transport de la pollution Solène Turquety, Cathy Clerbaux, Kathy Law, Juliette Hadji-Lazaro Service d'Aéronomie, IPSL, Paris, France. Pierre-François Coheur, Daniel Hurtmans, Catherine Wespes, Ariane Razavi, Service de Chimie Quantique et Photophysique, Université Libre de Bruxelles. Didier Hauglustaine, Anne Cozic, Laboratoire des Sciences du Climat et de l’Environnement, IPSL, Gif-sur-Yvette, France Christopher D. Boone, Peter F. Bernath Department of Chemistry, University of Waterloo, Waterloo, Canada Solène Turquety – ADOMOCA, 14 Novembre 2006

  2. X 106 2001 2001 MOPITT Importance of the long-range transport of pollution from Asia East central China Hong Kong Clerbaux et al., 2006 Heald et al., JGR, 2006 Richter et al., Nature, 2005 • IPCC : CO emissions × 3 for East Asia and India between 2000 and 2100 (scenario A2p) • NOx emissions × 4 • Long-range transport has important implication for air quality in downwind regions • Reaches a maximum in spring due to active anticyclone and strong westerly winds • Transport mainly in the middle troposphere • Trans-Pacific transport of pollution in 5-10 days Is there information on Asian pollution in the ACE solar occultation measurements in the middle and upper troposphere? Solène Turquety – ADOMOCA, 14 Novembre 2006

  3. [Clerbaux et al., GRL, 2005] ACE – Atmospheric Chemistry Experiment • ACE-SCISAT-1 is a Canadian mission launched on August 13th, 2003 • Primary instrument : ACE-FTS, high resolution IR spectrometer • Solar occultation : measurement of atmospheric profiles of temperature, pressure and a series of trace gases during sunrise and sunset • Modified global fit (Levenberg-Marquardt) [Boone et al., 2005] • Retrieval of key species for tropospheric studies: • O3, H2O, H2O2, CO, CH4, C2H6, C2H2, HCN, CH3Cl, SF6, OCS, HNO3, PAN,… • Vertical resolution ~4km in the middle and upper troposphere http://www.ace.uwaterloo.ca/mission.htm Solène Turquety – ADOMOCA, 14 Novembre 2006

  4. ACE occultations March–April–May 2005 (+) w/ ATSR hotspots (.) MOPITT @ 500hPa – April 2005 CO @ 500 hPa (ppbv) 40 100 160 Exploiting the complementarities for the study of long range transport • Focus on March-April 2005, a time period with ACE observations at mid-latitudes • Intercomparison of CO observations : • MOZAIC (in situ), MOPITT (nadir), ACE (solar occultation) • Study transport event in March-April 2005 with the global model LMDz-INCA Solène Turquety – ADOMOCA, 14 Novembre 2006

  5. MOZAIC + ACE @ 12km (April, 2005) 20050405 (26°N, 54°E) ACE MOZAIC 500 ACE solar occultation measurements vs. MOZAIC in situ data Comparisons for March-April-May 2004: +/- 2.5° , +/- 1 day 20050506 (48°N, 15°E) 20050504 (46°N, 72°W) ACE ACE MOZAIC MOZAIC 250 200 Solène Turquety – ADOMOCA, 14 Novembre 2006

  6. Smoothed profile using low resolution measurement characteristics Low resolution a priori profile Low resolution Averaging kernels High resolution: original retrieval ACE CO retrieval Averaging Kernels [Clerbaux et al., 2005] High vertical resolution ~ 4 km MOPITT CO retrieval Averaging kernels Low vertical resolution ~ 7 km Intercomparison of remote sensing CO measurements Intercomparison of Level 2 retrievals from different instruments: Need to account for characteristics of the retrievals. Rodgers and Connor, 2003: Apply retrieval characteristics of lower resolution measurement (e.g. MOPITT) to higher resolution measurement (e.g. in situ data, model simulations) Solène Turquety – ADOMOCA, 14 Novembre 2006

  7. MOPITT – April 4, 2005 MOPITT nadir vs. ACE occultation measurements * ACE occultations - - ss8848.asc Intercomparison +/- 1° , same day MOPITT MOPITT a priori profile ACE high resolution ACE/MOPITT (smoothed) • Good agreement : Δ ≤ 18% • MOPITT tends to give larger mixing ratios in the upper troposphere • ACE observations allows complementary measurement of plume vertical structure Solène Turquety – ADOMOCA, 14 Novembre 2006

  8. Intercomparison +/- 1° , same day • MOPITT • MOPITT a priori profile • ACE high resolution • ACE/MOPITT (smoothed) • MOZAIC high resolution • MOZAIC/MOPITT (smoothed) • ACE+MOZAIC/MOPITT (smoothed) DOFs=0.7 DOFs ~ 2: information haute troposphère dans MOPITT DOFs ~ 1: biais ACE / MOPITT dans la haute troposphère, liée à la contribution de la basse troposphère dans MOPITT Solène Turquety – ADOMOCA, 14 Novembre 2006

  9. LMDz-INCA global model simulation • Global GCM LMDz (Laboratoire de meteorologie Dynamique, zoom), version 4 (http://www.lmd.jussieu.fr/~lmdz) • Chemistry module INCA (Interaction of Chemistry and Aerosols) NMHC version 2: • 85 chemical species; over 300 reactions (Hauglustaine et al., 2005, http://www-lsceinca.cea.fr/) • Simulation using the nudged version, driven by ECMWF meteorological fields • Resolution 3.75° longitude x 2.5° latitude, 19 vertical levels (surface – 3hPa) • Anthropogenic emissions from EDGAR v.2; biogenic emissions from GEIA • Biomass burning emissions (1st approximation) : Climatology (average 1995-2003 from Van der Werf et al.) redistributed according to MODIS fire detection for 2005 (monthly emissions) MOPITT CO @ 700hPa – April 2005 SCIAMACHY tropospheric NO2 (KNMI) – April 2005 INCA tropospheric NO2 INCA x MOPITT AK Underestimate anthropogenic emissions (Asia) ; Need more accurate biomass burning Solène Turquety – ADOMOCA, 14 Novembre 2006

  10. Long-range transport from Asia in March-April 2005 20050329 MOPITT @ 500hPa – 20050327-20050404 20050330 20050401 20050331 INCA x MOPITT AK 20050402 20050403 ECMWF winds ACE observations Solène Turquety – ADOMOCA, 14 Novembre 2006

  11. Comparison of CO from ACE and the LMDz-INCA model INCA @ 400 hPa 20050327-20050404 Average INCA distribution for the days of ACE comparisons Solène Turquety – ADOMOCA, 14 Novembre 2006

  12. Comparison of CO from ACE and the LMDz-INCA model 120° 120° 150° 150° 180° -150° -120° 180° -150° -120° ACE occultation tropopause Solène Turquety – ADOMOCA, 14 Novembre 2006

  13. Comparison of CO from ACE and the LMDz-INCA model 120° 120° 150° 150° 180° -150° -120° 180° -150° -120° ACE occultation Solène Turquety – ADOMOCA, 14 Novembre 2006

  14. Comparison of O3 from ACE and the LMDz-INCA model INCA @ 400 hPa 20050327-20050404 Average INCA distribution for the days of ACE comparisons Solène Turquety – ADOMOCA, 14 Novembre 2006

  15. Comparison of O3 from ACE and the LMDz-INCA model 120° 120° 150° 150° 180° -150° -120° 180° -150° -120° ACE occultation Solène Turquety – ADOMOCA, 14 Novembre 2006

  16. 120° 150° 180° -150° -120° CO NOx ACE occultation O3 net production Stratospheric intrusion? Fraction of stratospheric O3 Solène Turquety – ADOMOCA, 14 Novembre 2006

  17. 120° 150° 180° -150° -120° ACE occultation CO NOx O3 net production Stratospheric intrusion? Fraction of stratospheric O3 Solène Turquety – ADOMOCA, 14 Novembre 2006

  18. Conclusions • ACE occultation measurements provide information on a series of trace gases with good vertical resolution in the upper troposphere • CO measurements consistent with MOZAIC in situ and MOPITT satellite measurements • Combined analysis with nadir measurements (better spatio-temporal resolution, lower vertical resolution) and global model provides information on the global context and transport pathways • ACE gives detailed information on the chemical composition of air masses in the upper troposphere • Interesting tool for the study of the long range transport • Future work • Comparisons to TES/Aura observations • Improve emissions in the LMDz-INCA simulation • using results from inverse modeling analyses • Analysis of ozone production during the long • range transport • Assimilation: complementary constraint from • different observation geometry? • Vertical resolution vs. number of observations intergrated? Solène Turquety – ADOMOCA, 14 Novembre 2006

More Related