G Ancellet

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The trends and variability of ozone are assessed over a northern mid-latitude station, Haute-Provence Observatory (OHP: 43.93 • N, 5.71 • E), using total column ozone observations from the Dobson and Système d'Analyse par Observation Zénithale spectrometers, and stratospheric ozone profile measurements from light detection and ranging (lidar), ozonesondes,(More)
We deployed an aerosol mass spectrometer during the POLARCAT (Polar Study using Aircraft, Remote Sensing , Surface Measurements and Models, of Climate, Chemistry , Aerosols, and Transport) summer campaign in Green-land in June/July 2008 on the research aircraft ATR-42. On-line size resolved chemical composition data of submicron aerosol were collected up to(More)
This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Using observations from aircraft, surface stations and satellite, we comprehensively evaluate multi-model simulations of carbon monoxide (CO) and ozone (O 3) in the Arc-tic and(More)
  • S Tilmes, L K Emmons, K S Law, G Ancellet, H Schlager, J.-D Paris +11 others
  • 2011
Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Anthropogenic pollution and wildfires are main producers of carbon monoxide (CO) and black carbon (BC) in the Northern Hemisphere.(More)
Using observations from aircraft, surface stations and a satellite instrument, we comprehensively evaluate multi-model simulations of carbon monoxide (CO) and ozone (O 3) in the Arctic and over lower latitude emission regions, as part of the POLARCAT Model Inter-comparison Project (POLMIP). Evaluation of 11-atmospheric models with chemistry shows that they(More)
The ozone variability observed by tropospheric ozone lidars during the ESCOMPTE campaign is analyzed by means of a hybrid-Lagrangian modeling study. Transport processes responsible for the formation of ozone-rich layers are identified using a semi-Lagrangian analysis of mesoscale simulations to identify the planetary boundary layer (PBL) footprint in the(More)
  • B Quennehen, A Schwarzenboeck, J Schmale, J Schneider, H Sodemann, A Stohl +3 others
  • 2011
Within the framework of the POLARCAT-France campaign, aerosol physical, chemical and optical properties over Greenland were measured onboard the French ATR-42 research aircraft. The origins of CO excess peaks detected in the aircraft measurements then have been identified through FLEXPART simulations. The study presented here focuses particularly on the(More)
The ozone variability observed by tropospheric ozone lidars during the ESCOMPTE campaign is analyzed by means of a hybrid-Lagrangian modeling study. Transport processes responsible for the formation of ozone-rich layers are identified using a semi-Lagrangian analysis of mesoscale simulations to identify the planetary boundary 5 layer (PBL) footprint in the(More)
  • C Di Biagio, C Di Biagio, L Doppler, C Gaimoz, N Grand, G Ancellet +7 others
  • 2015
This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract In this study we present airborne observations of aerosol and trace gases obtained over the sea in the Western Mediterranean Basin during the TRAQA (TRansport and Air QuAlity) and(More)
  • B Quennehen, J.-C Raut, K S Law, G Ancellet, C Clerbaux, S.-W Kim +21 others
  • 2015
This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract The ability of six global and one regional model to reproduce distributions of tropo-spheric ozone and its precursors, as well as aerosols over Asia in summer 2008 is evaluated(More)