- UHRA Home
- Browsing by Author
Browsing by Author "Centre for Atmospheric and Climate Physics Research"
Now showing items 321-340 of 432
-
Real Time Detection of Airborne Bioparticles in Antarctica
Crawford, Ian; Gallagher, Martin; Bower, Keith; Choularton, Thomas; Flynn, Michael; Ruske, Simon; Listowski, Constantino; Brough, Neil; Lachlan-Cope, Thomas; Fleming, Zoe; Foot, Virginia; Stanley, Warren (2017-12-01)We demonstrate for the first time, continuous real-time observations of airborne bio-fluorescent aerosols recorded at the British Antarctic Survey's Halley VI Research Station, located on the Brunt ice shelf close to the ... -
Real-time detection of airborne asbestos by light scattering from magnetically re-aligned fibers
Stopford, Chris; Kaye, Paul H.; Greenaway, Richard; Hirst, Edwin; Ulanowski, Zbigniew; Stanley, Warren (2013-05)Inadvertent inhalation of asbestos fibers and the subsequent development of incurable cancers is a leading cause of work-related deaths worldwide. Currently, there is no real-time in situ method for detecting airborne ... -
Real-time Sizing of Airborne Coarse Coal Dust : Proceedings of the 16th U.S. Mine Ventilation Symposium (J. F. Brune, ed.). Society for Mining, Metallurgy, and Exploration
Barone, Teresa; Hesse, Evelyn; Seaman, Clara; Baran, Anthony; Beck, T.W.; Harris, M.L.; Jaques, P.A.; Gao, P; Schwegler-Berry, D.E.; Mischler, S.E. (2017-06-22)Airborne coarse coal dust mitigation may help reduce combustible material deposits on mine surfaces. Mitigating low-size-range coarse particles (e.g. sub-20 µm) is important because of their high flammability. However, ... -
Recommendations for the spatial assessment of air quality resulting from the FP6 EU project Air4EU
Denby, Bruce; Larssen, Steinar; Builtjes, Peter; Keuken, Menno; Sokhi, Ranjeet; Moussiopoulos, Nicolas; Douros, John; Borrego, Carlos; Costa, Ana Margarida; Pregger, Thomas (2011)Air4EU is an FP6 European project with the major aim of providing recommendations on methodologies for the spatial assessment of air quality on local, urban and regional scales. The emphasis is on methodologies that combine ... -
Reconstructing the density operator via simple projectors
Steuernagel, O.; Vaccaro, J. (1995)We describe the representation of arbitrary density operators in terms of expectation values of simple projection operators. Two representations are presented which yield non–recursive schemes for experimentally determining ... -
Record heavy mineral dust outbreaks over Korea in 2010 : Two cases observed with multiwavelength aerosol/depolarization/Raman-quartz lidar
Tatarov, B.; Mueller, D.; Noh, Y. -M.; Lee, K. -H.; Shin, D. -H.; Shin, S. -K.; Sugimoto, N.; Seifert, P.; Kim, Y. -J. (2012-07-28)We report on two strong events of transport of mineral dust from Central Asia across Korea. The events took place in March and November 2010. The November case is important as fall is not a typical time for strong dust ... -
Refractive index profile measurements of diffused optical waveguides
Martin, William Eugene (1974-09-01)Refractive index profiles resulting from the fabrication of optical waveguides by diffusion techniques are measured using a reflection interferometric technique. In Cd-diffused ZnSe waveguides, the index variations are ... -
Refractive index profile optimization in diffused graded index lenses
Martin, William Eugene (1975-10)Refractive index profiles resulting from simple diffusion processes in glass are calculated, and optimum choices of diffusion parameters are chosen from minimum error in approximating focusing refractive index profiles. ... -
Regional air quality models and the regulation of atmospheric emissions
Fisher, Bernard E. A.; Chemel, C.; Sokhi, Ranjeet S.; Vazhappilly Francis, Xavier; Vincent, Keith J.; Dore, Anthony J.; Griffiths, Stephen J.; Sutton, Paul; Wright, Raymond D. (2015-09-01)This paper investigates regional air quality model performance and the regulation of atmospheric emissions. Although evaluation of regional models cannot be reduced to a set of rules, the paper shows ways of developing ... -
Regional dust model performance during SAMUM 2006
Haustein, K.; Perez, C.; Baldasano, J. M.; Mueller, D.; Tesche, Matthias; Schladitz, A.; Esselborn, M.; Weinzierl, B.; Kandler, K.; von Hoyningen-Huene, W. (2009-02-07)Traditionally there has been a lack of intensive measurements directly over dust sources for validating the accuracy of dust models. Utilizing the valuable and unprecedented SAMUM 2006 field campaign dust dataset in North ... -
Regional modelling of Saharan dust and biomass-burning smoke. Part 1 : Model description and evaluation
Heinold, Bernd; Tegen, Ina; Schepanski, Kerstin; Tesche, Matthias; Esselborn, Michael; Freudenthaler, Volker; Gross, Silke; Kandler, Konrad; Knippertz, Peter; Mueller, D.; Schladitz, Alexander; Toledano, Carlos; Weinzierl, Bernadett; Ansmann, Albert; Althausen, Dietrich; Müller, Thomas; Petzold, Andreas; Wiedensohler, Alfred (2011-09)The spatio-temporal evolution of the Saharan dust and biomass-burning plume during the SAMUM-2 field campaign in January and February 2008 is simulated at 28 km horizontal resolution with the regional model-system COSMO-MUSCAT. ... -
Regional Saharan dust modelling during the SAMUM 2006 campaign
Heinold, Bernd; Tegen, Ina; Esselborn, Michael; Kandler, Konrad; Knippertz, Peter; Mueller, D.; Schladitz, Alexander; Tesche, Matthias; Weinzierl, Bernadett; Ansmann, Albert; Althausen, Dietrich; Laurent, Benoit; Massling, Andreas; Mueller, Thomas; Petzold, Andreas; Schepanski, Kerstin; Wiedensohler, Alfred (2009-02)The regional dust model system LM-MUSCAT-DES was developed in the framework of the SAMUM project. Using the unique comprehensive data set of near-source dust properties during the 2006 SAMUM field campaign, the performance ... -
Relative-humidity profiling in the troposphere with a Raman lidar
Mattis, I.; Ansmann, A.; Althausen, D.; Jaenisch, V.; Wandinger, U.; Mueller, D.; Arshinov, Y. F.; Bobrovnikov, S. M.; Serikov, I. B. (2002-10-20)We describe a Raman-lidar-based approach to acquiring profiles of the relative humidity of air. For this purpose we combined in one instrument the Raman-lidar techniques that are used for the profiling of water vapor and ... -
Response of London's urban heat island to a marine air intrusion in an easterly wind regime
Chemel, C.; Sokhi, Ranjeet S. (2012-07)Numerical simulations are conducted using the Weather Research and Forecast numerical model to examine the effects of a marine air intrusion (including a sea-breeze front), in an easterly wind regime on 7 May 2008, on the ... -
Retrieval of aerosol optical thickness for desert conditions using MERIS observations during the SAMUM campaign
Dinter, Tilman; Von Hoyningen-Huene, Wolfgang; Burrows, John P.; Kokhanovsky, Alexander; Bierwirth, Eike; Wendisch, Manfred; Mueller, D.; Kahn, Ralph; Diouri, Mohammed (2009-02)Approximately 30% of the land surface is arid, having desert or semi-desert conditions. Aerosol originating from these regions plays a significant role in climate and atmospheric chemistry of the atmosphere. Retrieving ... -
Retrieval of aerosol parameters from multiwavelength lidar : Investigation of underlying inverse mathematical problem
Chemyakin, Eduard V.; Burton, Sharon P.; Kolgotin, Alexei; Mueller, D.; Hostetler, Chris A.; Ferrare, Richard A. (2016-03-16)We present an investigation of some important mathematical and numerical features related to the retrieval of microphysical parameters (complex refractive index, single-scattering albedo, effective radius, total number, ... -
Retrieval of aerosol properties from combined multiwavelength lidar and sunphotometer measurements
Pahlow, Markus; Mueller, D.; Tesche, Matthias; Eichler, Heike; Feingold, Graham; Eberhard, Wynn L.; Cheng, Ya-Fang (2006-10-01)Simulation studies were carried out with regard to the feasibility of using combined observations from sunphotometer (SPM) and lidar for microphysical characterization of aerosol particles, i.e., the retrieval of effective ... -
Retrieval of bimodal aerosol size distribution with multiwavelength Mie-Raman lidar
Veselovskii, Igor; Kolgotin, A.; Mueller, D. (INST TROPICAL MEDICINE ROTTERDAM - LEIDEN, 2003)The presentation reports on the feasibility to derive microphysical parameters of bimodal particle size distributions on the basis of Mie-Raman lidar instruments consisting of a tripled Nd:YAG laser. Such an instrument ... -
Retrieval of microphysical properties of aerosol particles from one-wavelength Raman lidar and multiwavelength Sun photometer observations
Tesche, Matthias; Mueller, D.; Ansmann, Albert; Hu, Min; Zhang, Yuanghang (2008-08)Aerosol Raman lidar observations of particle extinction and backscatter coefficients at 532 nm are combined with Sun photometer observations of the particle optical depth at six wavelengths from 381-1044 nm to derive ... -
Retrieval of physical particle properties from lidar observations of extinction and backscatter at multiple wavelengths
Mueller, D.; Wandinger, U.; Althausen, D.; Mattis, I.; Ansmann, A. (1998-04-20)Tropospheric height profiles of five particle backscatter coefficients between 355 and 800 nm and particle extinction coefficients at 355 and 532 nm measured with a multiple-wavelength backscatter lidar and a dual-wavelength. ...