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Retrieval of Aerosol Parameters from the Oxygen a Band in the Pres...

By: J. F. De Haan; A. F. J. Sanders

Description: Royal Netherlands Meteorological Institute (KNMI), De Bilt, the Netherlands. We have investigated the precision of retrieved aerosol parameters for a generic aerosol retrieval algorithm over vegetated land using the O2 A band. Chlorophyll fluorescence is taken into account in the forward model. Fluorescence emissions are modeled as isotropic contributions to the upwelling radiance field at the surface and they are retrieved along with aerosol...

Amoros-Lopez, J., Gomez-Chova, L., Vila-Frances, J., Alonso, L., Calpe, J., Moreno, J., and Del Valle-Tascon, S.: Evaluation of remote sensing of vegetation fluorescence by the analysis of diurnal cycles, Int. J. Remote Sens., 29, 17–18, 5423–5436, doi:10.1080/01431160802036391, 2008.; Badayev, V. V. and Malkevich, M. S.: On the possibility of retrieval of aerosol extinction vertical profile using satellite observat...

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A Chemical Analyzer for Charged Ultrafine Particles : Volume 6, Is...

By: A. Held; S. G. Gonser

Description: Junior Professorship in Atmospheric Chemistry, University of Bayreuth, 95440 Bayreuth, Germany. New particle formation is a frequent phenomenon in the atmosphere and of major significance for the Earth's climate and human health. To date the mechanisms leading to the nucleation of particles as well as to aerosol growth are not completely understood. A lack of appropriate measurement equipment for online analysis of the chemical composition of freshly nu...

Allan, J. D., Delia, A. E., Coe, H., Bower, K. N., Alfarra, M. R., Jimenez, J. L., Middlebrook, A. M., Drewnick, F., Onasch, T. B., Canagaratna, M. R., Jayne, J. T., and Worsnop, D. R.: A generalised method for the extraction of chemically resolved mass spectra from Aerodyne aerosol mass spectrometer data, J. Aerosol Sci., 35, 909–922, 2004.; Bahreini, R., Keywood, M. D., Ng, N. L., Varutbangkul, V., Gao, S., Flagan, R. C., Seinfeld, J. H., Worsnop, D. R., and Jimenez, J...

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Science Impact of Modis C5 Calibration Degradation and C6+ Improve...

By: J. Tucker; B. Franz; S. Platnick; T. Hilker; S. Korkin; X. Xiong; A. Wu; G. Meister; P. Sellers; R. Levy; Y. Wang; F. Hall; A. Lyapustin; A. Angal

Description: NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. The Collection 6 (C6) MODIS land and atmosphere datasets are scheduled for release in 2014. C6 contains significant revisions of the calibration approach to account for sensor aging. This analysis documents the presence of systematic temporal trends in the visible and near-infrared (500 m) bands of the Collection 5 (C5) MODIS Terra, and to lesser extent, in MODIS Aqua geophysical datasets. S...

Franz, B. A., Kwiatkowska, E. J., Meister, G., and McClain, C. R.: Moderate Resolution Imaging Spectroradiometer on Terra: limitations for ocean color applications, J. Appl. Remote Sens., 2, 023525, doi:10.1117/1.2957964, 2008.; Gordon, H. R., Du, T., and Zhang, T.: Atmospheric correction of ocean color sensors: analysis of the effects of residual instrument polarization sensitivity, Appl. Optics, 36, 6938–6948, 1997.; Hilk...

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Temporal Co-registration for Tropomi Cloud Clearing : Volume 4, Is...

By: R. Roebeling; J. Robaidek; M. Sneep; I. Genkova; P. Veefkind

Description: KNMI – Royal Netherlands Meteorological Institute, De Bilt, The Netherlands. The TROPOspheric Monitoring Instrument (TROPOMI) is planed for launch in 2014 on board of the Sentinel 5 Precursor (S5P) and is anticipated to provide high-quality and timely information on the global atmospheric composition for climate and air quality applications. TROPOMI will observe key atmospheric constituents such as ozone, nitrogen dioxide, sulfur dioxide, carbon monoxid...

Clothiaux, E., Ackerman, T. P., Mace, J., Moran, K., Marchand, R., Miller, M., and Martner, B.: Objective Determination of Cloud Heights and Radar Reflectivities Using a Combination of Active Remote Sensors at the ARM CART Sites, J. Appl. Meteorol., 39, 645–665, 2000.; Genkova, I., Seiz, G., Zuidema, P., Zhao, G., and Di Girolamo, L.: Cloud Top Height Comparisons from ASTER, MISR, and MODIS for Trade Wind Cumuli, Remote Sens. Environ., 107, 211–222, 2007.; Jedlovec, G. J...

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Retrieval of Aerosol Microphysical and Optical Properties Above Li...

By: M. Herman; L. Labonnote; C. Vanbauce; F. Waquet; O. Dubovik; C. Cornet; T. Lapionak; P. Goloub; J.-l. Deuzé; J. Riedi; F. Ducos; D. Tanré; F. Thieuleux

Description: Laboratoire d'Optique Atmosphérique, CNRS-INSU – UMR8518, Université Lille 1, Villeneuve d'Ascq, France. Most of the current aerosol retrievals from passive sensors are restricted to cloud-free scenes, which strongly reduces our ability to monitor the aerosol properties at a global scale. The presence of Aerosols Above Clouds (AAC) affects the polarized light reflected by the cloud layer, as shown by the spaceborne measurements provided by the POlarizati...

Ackerman, A. S., Toon, O. B., Stevens, D. E., Heymsfeld, A. J., Ramanathan V., and Welton. E. J.: Reduction of tropical cloudiness by soot, Science, 288, 1042–1047, doi:10.1126/science.288.5468.1042, 2000.; Ackermann, J.: The extinction-to-backscatter ratio of tropospheric aerosol: a numerical study, J. Atmos. Ocean. Tech., 15, 1043–1050, 1998.; Bréon, F.-M. and Doutriaux-Boucher, M.: A comparison of cloud dropl...

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The Scientific Basis for a Satellite Mission to Retrieve Ccn Conce...

By: N. O. Rennó; E. Freud; M. O. Andreae; E. Williams; D. Rosenfeld; U. Pöschl

Description: Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. The cloud -mediated radiative forcing is widely recognized as the main source of uncertainty in our knowledge of the anthropogenic climate forcing and in our understanding of climate sensitivity. Current outstanding challenges are (1) global measurements of cloud condensation nuclei (CCN) in the cloudy boundary layer from space, and, (2) disentangling the effects of...

Liu, C. and Zipser, E. J.: Warm Rain in the Tropics: Seasonal and regional distributions based on 9 years of TRMM data, J. Climate, 22, 767–779, 2009.; Albrecht, B. A.: Aerosols, cloud microphysics and fractional cloudiness, Science, 245, 1227–1230, 1989.; Andreae, M. O.: Correlation between cloud condensation nuclei concentration and aerosol optical thickness in remote and polluted regions, Atmos. Chem. Phys., 9, 543–556,

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Quantifying Residual Ionospheric Errors in Gnss Radio Occultation ...

By: S. Q. Wu; Z. X. Tan; Y. Li; C. L. Liu; R. Norman; K. Zhang; G. Kirchengast; J. Fritzer; S. C. Zhang; M. Schwaerz

Description: National Space Science Center (NSSC), Chinese Academy of Sciences, Beijing, China. The radio occultation (RO) technique using signals from the Global Navigation Satellite System (GNSS), in particular from the Global Positioning System (GPS) so far, is currently widely used to observe the atmosphere for applications such as numerical weather prediction and global climate monitoring. The ionosphere is a major error source in RO measurements at stratospher...

Bassiri, S. and Hajj, G. A.: High-order ionospheric effects on the GPS observables and means of modeling them, Manuscr. Geod., 18, 280–289, 1993.; Brunner, F. K. and Gu, M.: An improved model for the dual frequency ionospheric correction of GPS observation, Manuscr. Geod., 16, 205–214, 1991.; Budden, K. G.: The propagation of radio waves: the theory of radio waves of low power in the ionosphere and magnetosphere, Cambridge University Press, Cambridge, 669 pp., 1985.; Dan...

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Quality Aspects of the Measurements of a Wind Profiler in a Comple...

By: L. Gomez; M. Maruri; J. A. Romo

Description: Basque Meteorology Agency (EUSKALMET), Alava, Spain. It is well known amongst the scientific community that some remote sensing instruments have assumed that sample volumes present homogeneous conditions within a defined meteorological profile. At complex topographic sites and under extreme meteorological conditions, this assumption may be fallible depending on the site, and it is more likely to fail in the lower layers of the atmosphere. This piece of ...

Adachi, A., Kobayashi, T., Gage, K. S., Carter, A., Hartten, L. M., Clark, W. L., and Fukuda, M.: Evaluation of three-beam and four-beam profiler wind measurement techniques using a five-beam wind profiler and collocated meteorological tower, J. Atmos. Ocean. Tech., 22, 1167–1180, 2005.; Alonso, L., Gangoiti, G., Navazo, M., Maruri, M., Garcia, J. A., and Aranda, J. A.: The Punta Galea boundary layer profiler: Intercomparison with radiosonde data and first mesoscale mete...

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The Inter-comparison of Major Satellite Aerosol Retrieval Algorith...

By: O. Dubovik; G. E. Thomas; C. Emde; J. L. Deuzé; A. S. Prikhach; P. R. J. North; I. L. Katsev; V. V. Rozanov; D. J. Diner; M. J. Garay; J. Keller; R. G. Grainger; Y. Ota; F. Ducos; A. A. Kokhanovsky; D. Tanré; A. M. Sayer; R. Levy; A. Heckel; E. P. Zege; M. Herman

Description: Institute of Environmental Physics, University of Bremen, O. Hahn Allee 1, 28334 Bremen, Germany. Remote sensing of aerosol from space is a challenging and typically underdetermined retrieval task, requiring many assumptions to be made with respect to the aerosol and surface models. Therefore, the quality of a priori information plays a central role in any retrieval process (apart from the cloud screening procedure and the forward radiative ...

Abdou, W. A., Martonchik, J. V., Kahn, R. A., West, R. A., and Diner, D. J.: A modified linear-mixing method for calculating atmospheric path radiances of aerosol mixtures, J. Geophys. Res., 102, 16883–16888, 1997.; Ahmad, Z. and Fraser, R. S.: An iterative radiative transfer code for ocean-atmosphere systems, J. Atmos. Sci., 39, 656–665, 1982.; Berk, A., Anderson, G. P., Bernstein, L. S., Acharya, P. K., Dothe, H., Matthew, M. W., Adler-Golden, S. M., Chetwynd, J. H., R...

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A New Airborne Laser-induced Fluorescence Instrument for in Situ D...

By: A. K. Swanson; S. A. Bailey; G. M. Wolfe; T. F. Hanisco; H. L. Arkinson; M. Cazorla

Description: Atmospheric Chemistry and Dynamics Lab, NASA Goddard Space Flight Center, Greenbelt, MD, USA. The NASA In Situ Airborne Formaldehyde (ISAF) instrument is a high-performance laser-based detector for gas phase formaldehyde (HCHO). ISAF uses rotational-state specific laser excitation at 353 nm for laser-induced fluorescence (LIF) detection of HCHO. A number of features make ISAF ideal for airborne deployment, including (1) a compact, low-maintenance fiber ...

Apel, E. C., Olson, J. R., Crawford, J. H., Hornbrook, R. S., Hills, A. J., Cantrell, C. A., Emmons, L. K., Knapp, D. J., Hall, S., Mauldin III, R. L., Weinheimer, A. J., Fried, A., Blake, D. R., Crounse, J. D., Clair, J. M. St., Wennberg, P. O., Diskin, G. S., Fuelberg, H. E., Wisthaler, A., Mikoviny, T., Brune, W., and Riemer, D. D.: Impact of the deep convection of isoprene and other reactive trace species on radicals and ozone in the upper troposphere, Atmos. Chem. P...

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Ceilometer Aerosol Profiling Vs. Raman Lidar in the Frame of Inter...

By: J. Vande Hey; F. Amato; G. Pappalardo; F. Madonna

Description: Consiglio Nazionale delle Ricerche, Istituto di Metodologie per l'Analisi Ambientale (CNR-IMAA), C.da S. Loja – Zona Industriale, 85050 Tito Scalo, Potenza, Italy. Despite their differences from more advanced and more powerful lidars, the low construction and operation cost of ceilometers, originally designed for cloud base height monitoring, has fostered their use for the quantitative study of aerosol properties. The large number of ceilometers avai...

Ansmann, A., Riebesell, M., and Weitkamp, C.: Measurements of atmospheric aerosol extinction profiles with Raman lidar, Opt. Lett., 15, 746–748, 1990.; Ansmann, A., Wandinger, U., Riebesell, M., Weitkamp, C., and Michaelis, W.: Independent measurement of extinction and backscatter profiles in cirrus clouds by using a combined Raman elastic-backscatter lidar, Appl. Optics, 31, 7113–7131, 1992.; Binietoglou, I., Amodeo, A., D'Amico, G., Giunta, A., Madonna, F., Mona, L., a...

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Impacts of Volatilisation on Light Scattering and Filter-based Abs...

By: J. Backman; A. Virkkula; A. Frey; M. Aurela; T. Petäjä; R. Hillamo

Description: Department of Physics, University of Helsinki, P.O. Box 64, 00014, Finland. Aerosol light absorption measurements most commonly rely on filter-based techniques. These methods are influenced by light scattering constituents in the aerosol phase deposited on the filters. The coating of soot by non-absorbing constituents changes the mixing state of soot as the aerosol ages and increase light absorption by the aerosol. Most light scattering constituents in ...

Aalto, P., H{ä}meri, K., Becker, E., Weber, R., Salm, J., M{ä}kel{ä}, J., Hoell, C., O'Dowd, C., Karlsson, H., Hansson, H.-C., V{ä}kev{ä}, M., Koponen, I., Buzorius, G., and Kulmala, M.: Physical characterization of aerosol particles during nucleation events., Tellus, 53B, 344–358, 2001.; An, W. J., Pathak, R., Lee, B.-H., and Pandis, S.: Aerosol volatility measurement using an improved thermodenuder: Application to secondary organic aerosol, J. Aerosol Sci., 38, 305–314...

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Evaluation of Wind Profiles from the Nerc Mst Radar, Aberystwyth, ...

By: G. Vaughan; D. A. Hooper; C. F. Lee

Description: Department of Meteorology, University of Reading, Reading, UK. This study quantifies the uncertainties in winds measured by the Aberystwyth Mesosphere-Stratosphere-Troposphere (MST) radar (52.4° N, 4.0° W), before and after its renovation in March 2011. 127 radiosondes provide an independent measure of winds. Differences between radiosonde and radar-measured horizontal winds are correlated with long-term averages of vertical velocities, suggestin...

Adachi, A., Kobayashi, T., Gage, K. S., Carter, D. A., Hartten, L. M., Clark, W. L., and Fukuda, M.: Evaluation of three-beam and four-beam profiler wind measurement techniques using a five-beam wind profiler and collocated meteorological tower, J. Atmos. Ocean. Tech., 22, 1167–1180, 2005.; Cheong, B. L., Yu, T. Y., Palmer, R. D., Yang, K. F., Hoffman, M. W., Frasier, S. J., and Lopez-Dekker, F. J.: Effects of wind field inhomogeneities on Doppler beam swinging revealed ...

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Accounting for the Effects of Sastrugi in the Ceres Clear-sky Anta...

By: J. Corbett; W. Su

Description: Science Systems and Applications, Inc. NASA Langley Research Center, Mail Stop 420, Hampton, Virginia 23681-2199, USA. The Cloud and Earth's Radiant Energy System (CERES) Instruments on NASA's Terra, Aqua and Soumi-NPP satellites are used to provide a long-term measurement of the Earth's energy budget. To accomplish this, the radiances measured by the instruments must be inverted to fluxes by the use of a scene-type dependent angular distribution model (ADM...

Carroll, J. and Fitch, B.: Effects of solar elevation and cloudiness on snow albedo at the South Pole, J. Geophys. Res.-Oc. Atm., 86, 5271–5276, 1981.; Corbett, J. G., Su, W., and Loeb, N. G.: Observed effects of sastrugi on CERES top-of-atmosphere clear-sky reflected shortwave flux over Antarctica, J. Geophys. Res., 117, D18104, doi:10.1029/2012jd017529, 2012.; Diner, D. J., Beckert, J. C., Reilly, T. H., Bruegge, C. J....

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Tropospheric Ch4 Signals as Observed by Ndacc Ftir at Globally Dis...

By: M. Schneider; S. Barthlott; K. Strong; M. Steinbacher; R. Kohlhepp; M. Palm; D. Dubravica; A. Gomez-pelaez; D. Smale; Y. González; J. Notholt; D. W. T. Griffith; J. Robinson; F. Hase; S. Dohe; A. Sadeghi; D. Weaver; T. Warneke; D. Worthy; F. Meinhardt; M. Gisi; J. C. Guerra; T. Blumenstock; N. Jones; E. Sepúlveda; T. Aalto; O. E. García; N. M. Deutscher; G. W. Brailsford

Description: Izaña Atmospheric Research Center, Agencia Estatal de Meteorología (AEMET), Tenerife, Spain. We present lower/middle tropospheric column-averaged CH4 mole fraction time series measured by nine globally distributed ground-based FTIR (Fourier Transform InfraRed) remote sensing experiments of the Network for the Detection of Atmospheric Composition Change (NDACC). We show that these data are well representative of the tropospheric regional-...

Batchelor, R. L., Strong, K., Lindenmaier, R., Mittermeier, R. L., Fast, H., Drummond, J. R., and Fogal, P. F.: A new Bruker IFS 125HR FTIR spectrometer for the Polar Environment Atmospheric Research Laboratory at Eureka, Canada – measurements and comparison with the existing Bomem DA8 spectrometer, J. Atmos. Ocean. Tech., 26, 1328–1340, 2009.; Blumenstock, T., Kopp, G., Hase, F., Hochschild, G., Mikuteit, S., Raffalski, U., and Ruhnke, R.: Observation of unusual chlorin...

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Calibration of the Sbuv Version 8.6 Ozone Data Product : Volume 5,...

By: B. L. Fisher; S. L. Taylor; L. K. Huang; M. T. Deland

Description: Science Systems and Applications, Inc. (SSAI), 10210 Greenbelt Road, Suite 600, Lanham, Maryland 20706, USA. This paper describes the calibration process for the Solar Backscatter Ultraviolet (SBUV) Version 8.6 (V8.6) ozone data product. Eight SBUV instruments have flown on NASA and NOAA satellites since 1970, and a continuous data record is available since November 1978. The accuracy of ozone trends determined from these data depends on the calibration ...

Ball Aerospace Engineering Division: Specification Compliance and Calibration Data Book for SBUV/2 Flight Model {#}6, Mod. 8, IN021-A-035, Rev. A, October 2005.; Bhartia, P. K., McPeters, R. D., Flynn, L. E., Taylor, S., Kramrova, N. A., Frith, S., Fisher, B., and DeLand, M.: Solar Backscatter UV (SBUV) total ozone and profile algorithm, Atmos. Meas. Tech. Discuss., 5, 5913–5951, doi:10.5194/amtd-5-5913-2012, 2012.; ...

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Peak Fitting and Integration Uncertainties for the Aerodyne Aeroso...

By: J. D. Haskins; A. Othman; J. D. Allan; J. C. Corbin; U. Lohmann; B. Sierau; D. R. Worsnop; A. A. Mensah

Description: ETH Zurich, Institute for Atmospheric and Climate Science, Zurich, Switzerland. The errors inherent in the fitting and integration of the pseudo-Gaussian ion peaks in Aerodyne High-Resolution Aerosol Mass Spectrometers (HR-AMS's) have not been previously addressed as a source of imprecision for these instruments. This manuscript evaluates the significance of these uncertainties and proposes a method for their estimation in routine data analysis.

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Aiken, A. C., DeCarlo, P. F., and Jimenez, J. L.: Elemental analysis of organic species with electron ionization high-resolution mass spectrometry, Anal. Chem., 79, 8350–8358, doi:10.1021/ac071150w, 2007.; Aiken, A. C., DeCarlo, P. F., Kroll, J. H., Worsnop, D. R., Huffman, J. A., Docherty, K. S., Ulbrich, I. M., Mohr, C., Kimmel, J. R., and Sueper, D.: O/C and OM/OC ratios of primary, secondary, and ambient organic aerosol...

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Optimized Method for Black Carbon Analysis in Ice and Snow Using t...

By: J. A. Menking; S. D. Kaspari; I. A. Wendl; R. Färber; M. Gysel; M. Schwikowski; M. J. G. Laborde

Description: Laboratory of Radiochemistry and Environmental Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. In this study we attempt to optimize the method for measuring black carbon (BC) in snow and ice using a single particle soot photometer (SP2). Beside the previously applied ultrasonic (CETAC) and Collison-type nebulizers we introduce a jet (APEX-Q) nebulizer to aerosolize the aqueous sample for SP2 analysis. Both CETAC and APEX-Q requir...

Baumgardner, D., Popovicheva, O., Allan, J., Bernardoni, V., Cao, J., Cavalli, F., Cozic, J., Diapouli, E., Eleftheriadis, K., Genberg, P. J., Gonzalez, C., Gysel, M., John, A., Kirchstetter, T. W., Kuhlbusch, T. A. J., Laborde, M., Lack, D., Müller, T., Niessner, R., Petzold, A., Piazzalunga, A., Putaud, J. P., Schwarz, J., Sheridan, P., Subramanian, R., Swietlicki, E., Valli, G., Vecchi, R., and Viana, M.: Soot reference materials for instrument calibration and interco...

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Improved Cloud Mask Algorithm for Fy-3A/Virr Data Over the Northwe...

By: B. Zhao; Y. Zhu; X. Wang; W. Li

Description: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China. The existence of various land surfaces always leads to more difficulties in cloud detection based on satellite observations, especially over bright surfaces such as snow and deserts. To improve the cloud mask result over complex terrain, an unbiased, daytime cloud detection algorithm for the Vi...

Rossow, W. B. and Garder, L. C.: Cloud detection using satellite measurements of infrared and visible radiances for ISCCP, J. Climate, 6, 2341–2369, 1993.; Ackerman, S. A., Strabala, K. I., Menzel, W. P., Frey, R. A., Moeller, C. C., and Gumley, L. E.: Discriminating clear sky from clouds with MODIS, J. Geophys. Res., 103, 32141–32157, 1998.; Carlson, T. N. and Ripley, D. A.: On the relation between NDVI, fractional vegetation cover, and leaf area index, Remote Sens. Env...

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Tropospheric Column Amount of Ozone Retrieved from Sciamachy Limb-...

By: K. Eichmann; A. Rozanov; C. Von Savigny; A. Ladstätter-weißenmayer; H. Bovensmann; F. Ebojie; S. Bötel; J. P. Burrows; M. Weber; N. Rahpoe

Description: Institute of Environmental Physics (IUP), University of Bremen, P.O. Box 330440, 28334 Bremen, Germany. Tropospheric ozone, O3, has two sources: transport from the stratosphere and photochemical production in the troposphere. It plays important roles in atmospheric chemistry and climate change. In this manuscript we describe the retrieval of tropospheric O3 columns from limb-nadir matching (LNM) observations of the SCanning Imaging ...

Aumann, H. H., Chahine, M. T., Gautier, C., Goldberg, M. D., Kalnay, E., McMillin, L. M., Revercomb, H., Rosenkranz, P. W., Smith, W. L., Staelin, D. H., Strow, L. L., and Susskind, J.: AIRS/AMSU/HSB on the Aqua mission: Design, science objectives, data products and processing systems, IEEE T. Geosci. Remote, 41, 253–264, 2003.; Beer, R.: TES on the Aura mission: Scientific objectives, measurements,and analysis overview, IEEE T. Geosci. Remote, 44, 1102–1105, 2006.; Beir...

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