Search Results - "Elbern, H."

Data assimilation in atmospheric chemistry models: current status and future prospects for coupled chemistry meteorology models by Bocquet, M, Elbern, H, Eskes, H, Hirtl, M, Žabkar, R, Carmichael, G. R, Flemming, J, Inness, A, Pagowski, M, Pérez Camaño, J. L, Saide, P. E, San Jose, R, Sofiev, M, Vira, J, Baklanov, A, Carnevale, C, Grell, G, Seigneur, C

“…Data assimilation is used in atmospheric chemistry models to improve air quality forecasts, construct re-analyses of three-dimensional chemical (including…”
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Emission rate and chemical state estimation by 4-dimensional variational inversion by Elbern, H., Strunk, A., Schmidt, H., Talagrand, O.

“…This study aims to assess the potential and limits of an advanced inversion method to estimate pollutant precursor sources mainly from observations. Ozone,…”
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Singular vector decomposition for sensitivity analyses of tropospheric chemical scenarios by Goris, N, Elbern, H

“…Observations of the chemical state of the atmosphere typically provide only sparse snapshots of the state of the system due to their insufficient temporal and…”
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Singular vector-based targeted observations of chemical constituents: description and first application of the EURAD-IM-SVA v1.0 by Goris, N, Elbern, H

“…Measurements of the large-dimensional chemical state of the atmosphere provide only sparse snapshots of the state of the system due to their typically…”
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Chemical state estimation for the middle atmosphere by four-dimensional variational data assimilation: A posteriori validation of error statistics in observation space by Schwinger, J., Elbern, H.

“…Chemical state analyses of the atmosphere based on data assimilation may be degraded by inconsistent covariances of background and observation errors. An…”
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Chemical state estimation for the middle atmosphere by four-dimensional variational data assimilation: System configuration by Elbern, H., Schwinger, J., Botchorishvili, R.

“…A novel stratospheric chemical data assimilation system has been developed and applied to Environmental Satellite Michelson Interferometer for Passive…”
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TOWARD A MONITORING AND FORECASTING SYSTEM FOR ATMOSPHERIC COMPOSITION: The GEMS Project by Hollingsworth, A., Engelen, R. J., Textor, C., Benedetti, A., Boucher, O., Chevallier, F., Dethof, A., Elbern, H., Eskes, H., Flemming, J., Granier, C., Kaiser, J. W., Morcrette, J.-J., Rayner, P., Peuch, V.-H., Rouil, L., Schultz, M. G., Simmons, A. J.

“…The Global and Regional Earth System Monitoring Using Satellite and In Situ Data (GEMS) project is combining the manifold expertise in atmospheric composition…”
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Comparison of OMI NO2 tropospheric columns with an ensemble of global and European regional air quality models by Huijnen, V., Eskes, H.J., Poupkou, A., Elbern, H., Boersma, K.F., Foret, Gilles, Sofiev, M., Valdebenito, A., Flemming, J., Stein, O., Gross, A., Robertson, L., d'Isidoro, M., Kioutsioukis, I., Friese, E., Amstrup, B., Bergstrom, R., Strunk, A., Vira, J., Zyryanov, D., Maurizi, A., Melas, D., Peuch, Vincent-Henri, Zerefos, C.

“…We present a comparison of tropospheric NO2 from OMI measurements to the median of an ensemble of Regional Air Quality (RAQ) models, and an intercomparison of…”
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Impact of different ozone sounding networks on a 4D‐Var stratospheric data assimilation system by Baier, F., Erbertseder, T., Elbern, H., Schwinger, J.

“…Observing system simulation experiments (OSSEs) are performed to examine the impact of ozonesonde observations on a data assimilation system during a simulated…”
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Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May 2008 by Li, Y. P, Elbern, H, Lu, K. D, Friese, E, Kiendler-Scharr, A, Mentel, Th. F, Wang, X. S, Wahner, A, Zhang, Y. H

“…The formation of Secondary organic aerosol (SOA) was simulated with the Secondary ORGanic Aerosol Model (SORGAM) by a classical gas-particle partitioning…”
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Investigating a high ozone episode in a rural mountain site by Monteiro, A., Strunk, A., Carvalho, A., Tchepel, O., Miranda, A.I., Borrego, C., Saavedra, S., Rodríguez, A., Souto, J., Casares, J., Friese, E., Elbern, H.

“…A very high ozone episode with observed hourly values above 350 μg m −3 occurred in July 2005 at the Lamas d’Olo air quality monitoring station, located in a…”
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Observation operator for the assimilation of aerosol type resolving satellite measurements into a chemical transport model by Schroedter-Homscheidt, M, Elbern, H, Holzer-Popp, T

“…Modelling of aerosol particles with chemical transport models is still based mainly on static emission databases while episodic emissions cannot be treated…”
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A variational data assimilation system for soil–atmosphere flux estimates for the Community Land Model (CLM3.5) by Hoppe, C. M, Elbern, H, Schwinger, J

“…This paper presents the development and implementation of a spatio-temporal variational data assimilation system (4D-var) for the soil–vegetation–atmosphere…”
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4D-variational data assimilation with an adjoint air quality model for emission analysis by Elbern, H., Schmidt, H., Talagrand, O., Ebel, A.

“…The problem of analyzing the chemical state of the troposphere and the associated emission scenario on the basis of observations and model simulations is…”
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The Assimilation of Envisat data (ASSET) project by Lahoz, W. A., Geer, A. J., Bekki, S., Bormann, N., Ceccherini, S., Elbern, H., Errera, Q., Eskes, H. J., Fonteyn, D., Jackson, D. R., Khattatov, B., Marchand, M., Massart, S., Peuch, V.-H., Rharmili, S., Ridolfi, M., Segers, A., Talagrand, O., Thornton, H. E., Vik, A. F., von Clarmann, T.

“…This paper discusses the highlights of the EU-funded "Assimilation of Envisat data" (ASSET) project, which has involved assimilation of Envisat atmospheric…”
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Bias Correction Techniques to Improve Air Quality Ensemble Predictions: Focus on O₃ and PM Over Portugal by Monteiro, A, Ribeiro, I, Tchepel, O, Sá, E, Ferreira, J, Carvalho, A, Martins, V, Strunk, A, Galmarini, S, Elbern, H, Schaap, M, Builtjes, P, Miranda, A. I, Borrego, C

“…Five air quality models were applied over Portugal for July 2006 and used as ensemble members. Each model was used, with its original set up in terms of…”
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Global chemical weather forecasts for field campaign planning: predictions and observations of large-scale features during MINOS, CONTRACE, and INDOEX by Lawrence, M. G., Rasch, P. J., von Kuhlmann, R., Williams, J., Fischer, H., de Reus, M., Lelieveld, J., Crutzen, P. J., Schultz, M., Stier, P., Huntrieser, H., Heland, J., Stohl, A., Forster, C., Elbern, H., Jakobs, H., Dickerson, R. R.

“…The first global tropospheric forecasts of O3 and its precursors have been used in the daily flight planning of field measurement campaigns. The 3-D…”
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MONITORING AIR QUALITY FROM SPACE: The Case for the Geostationary Platform by Lahoz, W. A., Peuch, V.-H., Orphal, J., Attié, J.-L., Chance, K., Liu, X., Edwards, D., Elbern, H., Flaud, J.-M., Claeyman, M., El Amraoui, L.

“…Air quality (AQ) is defined by the atmospheric composition of gases and particulates near the Earth's surface. This composition depends on local emissions of…”
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3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model by Zyryanov, D., Foret, G., Eremenko, M., Beekmann, M., Cammas, J.-P., D'Isidoro, M., Elbern, H., Flemming, J., Friese, E., Kioutsioutkis, I., Maurizi, A., Melas, D., Meleux, F., Menut, L., Moinat, P., Peuch, V.-H., Poupkou, A., Razinger, M., Schultz, M., Stein, O., Suttie, A. M., Valdebenito, A., Zerefos, C., Dufour, G., Bergametti, G., Flaud, J.-M.

“…A detailed 3-D evaluation of an ensemble of five regional Chemistry Transport Models (RCTM) and one global CTM with focus on free tropospheric ozone over…”
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Understanding the aerosol information content in multi-spectral reflectance measurements using a synergetic retrieval algorithm by Martynenko, D., Holzer-Popp, T., Elbern, H., Schroedter-Homscheidt, M.

“…An information content analysis for multi-wavelength SYNergetic AErosol Retrieval algorithm SYNAER was performed to quantify the number of independent pieces…”
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