Search Results - "Cammas, J."

Changes in ozone over Europe: Analysis of ozone measurements from sondes, regular aircraft (MOZAIC) and alpine surface sites by Logan, J. A., Staehelin, J., Megretskaia, I. A., Cammas, J.-P., Thouret, V., Claude, H., De Backer, H., Steinbacher, M., Scheel, H.-E., Stübi, R., Fröhlich, M., Derwent, R.

“…We use ozone observations from sondes, regular aircraft, and alpine surface sites in a self‐consistent analysis to determine robust changes in the time…”
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Tropospheric ozone climatology over Beijing: analysis of aircraft data from the MOZAIC program by Ding, A. J., Wang, T., Thouret, V., Cammas, J.-P., Nédélec, P.

“…Ozone (O3) profiles recorded over Beijing from 1995 to 2005 by the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) program were…”
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Examination of the atmospheric conditions associated with high and low summer ozone levels in the lower troposphere over the eastern Mediterranean by Kalabokas, P. D, Cammas, J.-P, Thouret, V, Volz-Thomas, A, Boulanger, D, Repapis, C. C

“…In order to evaluate the observed high rural ozone levels in the eastern Mediterranean area during summertime, vertical profiles of ozone measured in the…”
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Increasing springtime ozone mixing ratios in the free troposphere over western North America by Cooper, O. R, Parrish, D. D, Stohl, A, Trainer, M, Nédélec, P, Thouret, V, Cammas, J. P, Oltmans, S. J, Johnson, B. J, Tarasick, D, Leblanc, T, McDermid, I. S, Jaffe, D, Gao, R, Stith, J, Ryerson, T, Aikin, K, Campos, T, Weinheimer, A, Avery, M. A

“…In the lowermost layer of the atmosphere—the troposphere—ozone is an important source of the hydroxyl radical, an oxidant that breaks down most pollutants and…”
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Climatology of pure tropospheric profiles and column contents of ozone and carbon monoxide using MOZAIC in the mid-northern latitudes (24° N to 50° N) from 1994 to 2009 by Zbinden, R. M, Thouret, V, Ricaud, P, Carminati, F, Cammas, J.-P, Nédélec, P

“…The objective of this paper is to deliver the most accurate ozone (O3) and carbon monoxide (CO) climatology for the pure troposphere only, i.e. exclusively…”
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Severe ozone air pollution in the Persian Gulf region by Lelieveld, J., Hoor, P., Jöckel, P., Pozzer, A., Hadjinicolaou, P., Cammas, J.-P., Beirle, S.

“…Recently it was discovered that over the Middle East during summer ozone mixing ratios can reach a pronounced maximum in the middle troposphere. Here we extend…”
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Airborne observations of the impact of a convective system on the planetary boundary layer thermodynamics and aerosol distribution in the inter‐tropical discontinuity region of the West African Monsoon by Flamant, C., Chaboureau, J.‐P., Parker, D. J., Taylor, C. M., Cammas, J.‐P., Bock, O., Timouk, F., Pelon, J.

“…The impact of a convective system downdraught and associated gravity current on the monsoon and harmattan flow structure as well as on aerosol vertical…”
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Observational characteristics of the tropopause inversion layer derived from CHAMP/GRACE radio occultations and MOZAIC aircraft data by Schmidt, T., Cammas, J.-P., Smit, H. G. J., Heise, S., Wickert, J., Haser, A.

“…In this study we discuss characteristics of the Northern Hemisphere (NH) midlatitude (40°N–60°N) tropopause inversion layer (TIL) based on two data sets…”
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Multiple subtropical stratospheric intrusions over Reunion Island: Observational, Lagrangian, and Eulerian numerical modeling approaches by Vérèmes, H., Cammas, J.‐P., Baray, J.‐L., Keckhut, P., Barthe, C., Posny, F., Tulet, P., Dionisi, D., Bielli, S.

“…Signatures of multiple stratospheric intrusions were observed on simultaneous and collocated ozone and water vapor profiles retrieved by lidars and radiosondes…”
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Air pollution during the 2003 European heat wave as seen by MOZAIC airliners by Tressol, M., Ordonez, C., Zbinden, R., Brioude, J., Thouret, V., Mari, C., Nedelec, P., Cammas, J.-P., Smit, H., Patz, H.-W., Volz-Thomas, A.

“…This study presents an analysis of both MOZAIC profiles above Frankfurt and Lagrangian dispersion model simulations for the 2003 European heat wave. The…”
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A numerical study of tropical cross-tropopause transport by convective overshoots by Chaboureau, J.-P., Cammas, J.-P., Duron, J., Mascart, P. J., Sitnikov, N. M., Voessing, H.-J.

“…Observations obtained during the Tropical Convection, Cirrus and Nitrogen Oxides (TROCCINOX) golden day have revealed the presence of ice particles up to 410 K…”
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Assimilation of IASI satellite CO fields into a global chemistry transport model for validation against aircraft measurements by Klonecki, A, Pommier, M, Clerbaux, C, Ancellet, G, Cammas, J.-P, Coheur, P.-F, Cozic, A, Diskin, G. S, Hadji-Lazaro, J, Hauglustaine, D. A, Hurtmans, D, Khattatov, B, Lamarque, J.-F, Law, K. S, Nedelec, P, Paris, J.-D, Podolske, J. R, Prunet, P, Schlager, H, Szopa, S, Turquety, S

“…This work evaluates the IASI CO product against independent in-situ aircraft data from the MOZAIC program and the POLARCAT aircraft campaign. The validation is…”
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Meridional ozone gradients in the African upper troposphere by Sauvage, B., Thouret, V., Cammas, J.-P., Brioude, J., Nédélec, P., Mari, C.

“…This study presents regular observations from the MOZAIC data base over Africa (1994–2004) to highlight the role of Hadley cells in tropical ozone production…”
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Global model simulations of air pollution during the 2003 European heat wave by Ordóñez, C., Elguindi, N., Stein, O., Huijnen, V., Flemming, J., Inness, A., Flentje, H., Katragkou, E., Moinat, P., Peuch, V.-H., Segers, A., Thouret, V., Athier, G., van Weele, M., Zerefos, C. S., Cammas, J.-P., Schultz, M. G.

“…Three global Chemistry Transport Models – MOZART, MOCAGE, and TM5 – as well as MOZART coupled to the IFS meteorological model including assimilation of ozone…”
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Enhanced view of the “tropical Atlantic ozone paradox” and “zonal wave one” from the in situ MOZAIC and SHADOZ data by Sauvage, B., Thouret, V., Thompson, A. M., Witte, J. C., Cammas, J.-P., Nédélec, P., Athier, G.

“…Ozone vertical profiles from the Measurements of Ozone from Airbus In‐service Aircraft (MOZAIC) program over Africa are used to complement pictures of the…”
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Tropopause referenced ozone climatology and inter-annual variability (1994–2003) from the MOZAIC programme by Thouret, V., Cammas, J.-P., Sauvage, B., Athier, G., Zbinden, R., Nédélec, P., Simon, P., Karcher, F.

“…The MOZAIC programme collects ozone and water vapour data using automatic equipment installed on board five long-range Airbus A340 aircraft flying regularly…”
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Tropospheric ozone over the tropical Atlantic: A satellite perspective by Edwards, D. P., Lamarque, J.-F., Attié, J.-L., Emmons, L. K., Richter, A., Cammas, J.-P., Gille, J. C., Francis, G. L., Deeter, M. N., Warner, J., Ziskin, D. C., Lyjak, L. V., Drummond, J. R., Burrows, J. P.

“…We use satellite sensor measurements to obtain a broad picture of the processes affecting tropical tropospheric O3 production over Africa and the Atlantic in…”
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The influence of biogenic emissions from Africa on tropical tropospheric ozone during 2006: a global modeling study by Williams, J. E., Scheele, M. P., van Velthoven, P. F. J., Cammas, J.-P., Thouret, V., Galy-Lacaux, C., Volz-Thomas, A.

“…We have performed simulations using a 3-D global chemistry-transport model to investigate the influence that biogenic emissions from the African continent…”
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Validation of Aura Microwave Limb Sounder O 3 and CO observations in the upper troposphere and lower stratosphere by Livesey, N. J., Filipiak, M. J., Froidevaux, L., Read, W. G., Lambert, A., Santee, M. L., Jiang, J. H., Pumphrey, H. C., Waters, J. W., Cofield, R. E., Cuddy, D. T., Daffer, W. H., Drouin, B. J., Fuller, R. A., Jarnot, R. F., Jiang, Y. B., Knosp, B. W., Li, Q. B., Perun, V. S., Schwartz, M. J., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Avery, M., Browell, E. V., Cammas, J.‐P., Christensen, L. E., Diskin, G. S., Gao, R.‐S., Jost, H.‐J., Loewenstein, M., Lopez, J. D., Nedelec, P., Osterman, G. B., Sachse, G. W., Webster, C. R.

“…Global satellite observations of ozone and carbon monoxide from the Microwave Limb Sounder (MLS) on the EOS Aura spacecraft are discussed with emphasis on…”
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A lagrangian approach to analyse the tropospheric ozone climatology in the tropics: Climatology of stratosphere–troposphere exchange at Reunion Island by Clain, G., Baray, J.-L., Delmas, R., Keckhut, P., Cammas, J.-P.

“…Sixteen years of ozone measurements (1992–2006) at Reunion Island (21°S, 55.5°E) have been processed to detect stratospheric signatures on each single ozone…”
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