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Browsing by Author "Centre for Atmospheric and Climate Physics Research"
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Optical waveguides by diffusion in II-VI compounds
Martin, William Eugene; Hall, D.B. (1972)Planar optical waveguides have been made by sealed ampoule diffusion of Cd and Se into ZnS and Cd into ZnSe. Three-dimensional diffused guides of Cd-diffused ZnSe have been made by using a masking layer of evaporated ... -
Optical-system for Argus 355-nm 90-mm aperture target illumination experiments
Johnson, B.C.; Hildum, J.S.; Linford, G.; Hermes, G.; Boyd, R.; Martin, Bill (1981-12) -
Optimization of lidar data processing : a goal of the EARILINET-ASOS project
Amodeo, Aldo; Mattis, Ina; Boeckmann, Christine; D'Amico, Giuseppe; Mueller, D.; Osterloh, Lukas; Chaikovsky, Anatoly; Pappalardo, Gelsomina; Ansmann, Albert; Apituley, Arnoud; Alados-Arboledas, Lucas; Balis, Dimitris; Comeron, Adolfo; Freudenthaler, Volker; Mitev, Valentin; Nicolae, Doina; Papayannis, Alexandros; Perrone, Maria Rita; Pietruezuk, Aleksander; Pujadas, Manuel; Putaud, Jean-Philippe; Ravetta, Francois; Rizi, Vincenzo; Simeonovs, Valentin; Spinelli, Nicola; Stebel, Kersten; Stoyanov, Dimitar; Trickl, Thomas; Wiegner, Matthias (SPIE, 2007)EARLINET-ASOS (European Aerosol Research Lidar Network - Advanced Sustainable Observation System) is a 5-year EC Project started in 2006. Based on the EARLINET infrastructure, it will provide appropriate tools to improve ... -
Ozonesonde profiles from the West Pacific Warm Pool: measurements and validation
Newton, R.; Vaughan, G.; Ricketts, H.M.A.; Pan, L. L.; Weinheimer, A. J.; Chemel, C. (2016-01-20)We present a series of ozonesonde profiles measured from Manus Island, Papua New Guinea, during February 2014, with new insights on the calibration of ozonesondes for measurements in the tropical troposphere. The experiment ... -
Particle backscatter, extinction, and lidar ratio profiling with Raman lidar in south and north China
Tesche, Matthias; Ansmann, Albert; Mueller, D.; Althausen, Dietrich; Engelmann, Ronny; Hu, Min; Zhang, Yuanghang (2007-09-01)Aerosol Raman lidar observations of profiles of the particle extinction and backscatter coefficients and the respective extinction-to-backscatter ratio (lidar ratio) were performed under highly polluted conditions in the ... -
Particle concentration measurements in a busy street canyon: initial observations from Swansea, Wales
Price, Heather; Jones, Tim; BeruBe, Kelly (Inst of Environment & Health, Cranfield University, 2009) -
Particle extinction measured at ambient conditions with differential optical absorption spectroscopy. 1 : System setup and characterization
Mueller, T.; Mueller, D.; Dubois, R. (2005-03-20)We describe an instrument for measuring the particle extinction coefficient at ambient conditions in the spectral range from 270 to 1000 nm. It is based on a differential optical absorption spectroscopy (DOAS) system, which ... -
Particle extinction measured at ambient conditions with differential optical absorption spectroscopy. 2 : Closure study
Mueller, T.; Mueller, D.; Dubois, R. (2006-04-01)Spectral particle extinction coefficients of atmospheric aerosols were measured with, to the best of our knowledge, a newly designed differential optical absorption spectroscopy (DOAS) instrument. A closure study was carried ... -
Particle habit imaging using incoherent light : a first step toward a novel instrument for cloud microphysics
Schoen, Roland; Schnaiter, Martin; Ulanowski, Zbigniew; Schmitt, Carl; Benz, Stefan; Moehler, Ottmar; Vogt, Steffen; Wagner, Robert; Schurath, Ulrich (2011-04)The imaging unit of the novel cloud particle instrument Particle Habit Imaging and Polar Scattering (PHIPS) probe has been developed to image individual ice particles produced inside a large cloud chamber. The PHIPS produces ... -
Particulate matter air pollution components and incidence of cancers of the stomach and the upper aerodigestive tract in the European Study of Cohorts of Air Pollution Effects (ESCAPE)
Weinmayr, Gudrun; Pedersen, Marie; Stafoggia, Massimo; Andersen, Zorana J.; Galassi, Claudia; Munkenast, Jule; Jaensch, Andrea; Oftedal, Bente; Krog, Norun H.; Aamodt, Geir; Pyko, Andrei; Pershagen, Göran; Korek, Michal; De Faire, Ulf; Pedersen, Nancy L.; Östenson, Claes Göran; Rizzuto, Debora; Sørensen, Mette; Tjønneland, Anne; Bueno-de-Mesquita, Bas; Vermeulen, Roel; Eeftens, Marloes; Concin, Hans; Lang, Alois; Wang, Meng; Tsai, Ming Yi; Ricceri, Fulvio; Sacerdote, Carlotta; Ranzi, Andrea; Cesaroni, Giulia; Forastiere, Francesco; de Hoogh, Kees; Beelen, Rob; Vineis, Paolo; Kooter, Ingeborg; Sokhi, Ranjeet; Brunekreef, Bert; Hoek, Gerard; Raaschou-Nielsen, Ole; Nagel, Gabriele (2018-11-01)Introduction: Previous analysis from the large European multicentre ESCAPE study showed an association of ambient particulate matter <2.5 μm (PM2.5) air pollution exposure at residence with the incidence of gastric cancer. ... -
Performance characteristics of MM5-SMOKE-CMAQ for a summer photochemical episode in Southeast England, United Kingdom
Yu, Y.; Sokhi, R.S.; Kitwroon, N.; Middleton, D.R.; Fisher, B. (2008)In this study a modelling system consisting of Mesoscale Model (MM5), Sparse Matrix Operator Kernel Emissions (SMOKE) and Community Multiscale Air Quality (CMAQ) model has been applied to a summer photochemical period in ... -
Phase space distributions from three-port couplers
Paris, M.G.A.; Chizhov, A.V.; Steuernagel, O. (1997)A wide class of phase space distributions of a single mode radiation field is shown to be directly accessible to measurement by linear symmetric three-port optical couplers. -
PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe-Part 1: Design and operation
Abdelmotaleb, Ahmed; Järvinen, Emma; Duft, D; Hirst, Edwin; Vogt, Steffen; Leisner, T.; Schnaiter, Martin (Copernicus Publications, 2016-07-20)The number and shape of ice crystals present in mixed-phase and ice clouds influence the radiation properties, precipitation occurrence and lifetime of these clouds. Since clouds play a major role in the climate system, ... -
Photoluminescence determinations of Cd diffusion in ZnSe
Martin, William Eugene (1973)The diffusion constant D(T) of cadmium into single-crystal zinc selenide was measured using a photoluminescence/etch technique. Diffusions were performed in sealed ampoules using cadmium metal and cadmium selenide powder ... -
Physical properties of the Indian aerosol plume derived from six-wavelength lidar observations on 25 March 1999 of the Indian Ocean Experiment
Mueller, D.; Wagner, F.; Althausen, D.; Wandinger, U.; Ansmann, A. (2000-05-01)A major pollution outbreak from the Indian subcontinent was observed with a six-wavelength aerosol lidar at Hulule island (4.1 degrees N, 73.3 degrees E) on 25 March 1999 during the Indian Ocean Experiment. From the observed ... -
Polarized optical scattering signatures from biological materials
Martin, William Eugene; Hesse, E.; Hough, J.H.; Sparks, W.B.; Cockell, C.S.; Ulanowski, Z.; Germer, T.A.; Kaye, Paul H. (2010-11)The polarization of laser light backscattered from biological samples has been measured over the wavelength range 350-850. nm. Incident circular, linearly polarized, and unpolarized light produces significant spectral ... -
Pollutant dispersion in a developing valley cold-air pool
Chemel, C.; Burns, Paul (2015-03-01)Pollutants are trapped and accumulate within cold-air pools, thereby affecting air quality. A numerical model is used to quantify the role of cold-air-pooling processes in the dispersion of air pollution in a developing ... -
Portable Raman Lidar Polly(XT) for Automated Profiling of Aerosol Backscatter, Extinction, and Depolarization
Althausen, Dietrich; Engelmann, Ronny; Baars, Holger; Heese, Birgit; Ansmann, Albert; Mueller, D.; Komppula, Mika (2009-11)Two versions of the portable aerosol Raman lidar system (Polly) are presented. First, the two-channel prototype is depicted. It has been developed for the independent and simultaneous determination of particle backscatter ... -
Potential of lidar backscatter data to estimate solar aerosol radiative forcing
Wendisch, Manfred; Mueller, D.; Mattis, I.; Ansmann, A. (2006-02-01)The potential to estimate solar aerosol radiative forcing (SARF) in cloudless conditions from backscatter data measured by widespread standard lidar has been investigated. For this purpose 132 days of sophisticated ... -
Predictions of UK regulated power station contributions to regional air pollution and deposition : A model comparison exercise
Chemel, C.; Sokhi, Ranjeet S.; Dore, Anthony J.; Sutton, Paul; Vincent, K.J.; Griffiths, Stephen J.; Hayman, Garry D.; Wright, Raymond D.; Baggaley, Matthew; Hallsworth, Stephen; Prain, H. Douglas; Fisher, Bernard E. A. (2011-11)Contributions of the emissions from a U.K. regulated fossil-fuel power station to regional air pollution and deposition are estimated using four air quality modeling systems for the year 2003. The modeling systems vary in ...