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Browsing by Author "Centre for Atmospheric and Climate Physics Research"
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The 16 April 2010 major volcanic ash plume over central Europe : EARLINET lidar and AERONET photometer observations at Leipzig and Munich, Germany
Ansmann, A.; Tesche, Matthias; Gross, S.; Freudenthaler, V.; Seifert, P.; Hiebsch, A.; Schmidt, J.; Wandinger, U.; Mattis, I.; Mueller, D.; Wiegner, M. (2010-07-15)The optically thickest volcanic ash plume ever measured over Germany was monitored with multiwavelength Raman lidars and Sun photometer at Leipzig and Munich. When this ash layer, originating from the Eyjafjoll eruptions ... -
3+2 + X: what is the most useful depolarization input for retrieving microphysical properties of non-spherical particles from lidar measurements using the spheroid model of Dubovik et al. (2006)?
Tesche, Matthias; Kolgotin, Alexei; Haarig, Moritz; Burton, Sharon P.; Ferrare, Richard A.; Hostetler, Chris A.; Mueller, Detlef (2019-08-19)The typical multiwavelength aerosol lidar data set for inversion of optical to microphysical parameters is composed of three backscatter coefficients (β) at 355, 532, and 1064 nm and two extinction coefficients (α) at 355 ... -
A 3D implementation of ray tracing combined with diffraction on facets: Verification and a potential application
Clarke, A.J.M.; Hesse, E.; Ulanowski, Z.; Kaye, Paul H. (2006)A 3D implementation of a new model of light scattering applicable to dielectric faceted objects is introduced. The model combines standard geometric optics with diffraction on individual facets. It can be applied to any ... -
The Ability of the Small Ice Detector (SID-2) to Characterize Cloud Particle and Aerosol Morphologies Obtained during Flights of the FAAM BAe-146 Research Aircraft
Cotton, R.; Osborne, S.; Ulanowski, Z.; Hirst, E.; Kaye, Paul H.; Greenaway, R. (2010)The Small Ice Detector mark 2 (SID-2), which was built by the University of Hertfordshire, has been operated by the Met Office on the Facility for Atmospheric Airborne Research (FAAM) BAe-146 aircraft during a large number ... -
Activity pattern and personal exposure to nitrogen dioxide in indoor and outdoor microenvironments
Kornartit, C.; Sokhi, R.S.; Burton, Agneta; Ravindra, K. (2010-01)People are exposed to air pollution from a range of indoor and outdoor sources. Concentrations of nitrogen dioxide (NO2), which is hazardous to health, can be significant in both types of environments. This paper reports ... -
Advances in air quality research – current and emerging challenges
Sokhi, Ranjeet; Moussiopoulos, Nicolas; Baklanov, Alexander; Bartzis, John; Coll, Isabelle; Finardi, Sandro; Friedrich, Rainer; Geels, Camilla; Grönholm, Tia; Halenka, Tomas; Ketzel, Matthias; Maragkidou, Androniki; Matthias, Volker; Moldanova, Jana; Ntziachristos, Leonidas; Schäfer, Klaus; Suppan, Peter; Tsegas, George; Carmichael, Greg; Franco, Vicente; Hanna, Steve; Jalkanen, Jukka-Pekka; . Velders, Guus J. M.; Kukkonen, Jaakko (2022-04-11)This review provides a community’s perspective on air quality research focusing mainly on developmentsover the past decade. The article provides perspectives on current and future challenges as well asresearch needs for ... -
Aerosol absorption profiling from the synergy of lidar and sun-photometry : The ACTRIS-2 campaigns in Germany, Greece and Cyprus
Tsekeri, Alexandra; Amiridis, Vassilis; Lopatin, Anton; Marinou, Eleni; Giannakaki, Eleni; Pikridas, Michael; Sciare, Jean; Liakakou, Eleni; Gerasopoulos, Evangelos; Duesing, Sebastian; Corbin, Joel C.; Gysel, Martin; Bukowiecki, Nicolas; Baars, Holger; Engelmann, Ronny; Wehner, Birgit; Kottas, Michael; Mamali, Dimitra; Kokkalis, Panagiotis; Raptis, Panagiotis I.; Stavroulas, Iasonas; Keleshis, Christos; Müller, Detlef; Solomos, Stavros; Binietoglou, Ioannis; Mihalopoulos, Nikolaos; Papayannis, Alexandros; Stachlewska, Iwona S.; Igloffstein, Julia; Wandinger, Ulla; Wandinger, Ulla; Dubovik, Oleg; Goloub, Philippe (2018-04-13)Aerosol absorption profiling is crucial for radiative transfer calculations and climate modelling. Here, we utilize the synergy of lidar with sun-photometer measurements to derive the absorption coefficient and single ... -
Aerosol indirect effects as a function of cloud top pressure
Massie, Steven T.; Heymsfield, Andrew; Schmitt, Carl; Mueller, D.; Seifert, Patric (2007-03-16)Aerosol indirect effects are quantified as a function of cloud top pressure over India and the Indian Ocean in February and March 2003-2005 from analyses of moderate resolution imaging spectroradiometer ( MODIS) radiances, ... -
Aerosol lofting from sea breeze during the Indian Ocean Experiment
Verma, S.; Boucher, O.; Venkataraman, C.; Reddy, M.S.; Mueller, D.; Chazette, P.; Crouzille, B. (2006-04-14)This work was carried out to understand the mechanisms leading to lofting and large-scale advection of aerosols over the Indian Ocean region due to interaction of the sea breeze with the northeast monsoon winds along the ... -
Aerosol optical and microphysical retrievals from a hybrid multiwavelength lidar data set - DISCOVER-AQ 2011
Sawamura, P.; Müller, D.; Hoff, R. M.; Hostetler, C. A.; Ferrare, R. A.; Hair, J. W.; Rogers, R. R.; Anderson, B. E.; Ziemba, L. D.; Beyersdorf, A. J.; Thornhill, K. L.; Winstead, E. L.; Holben, B. N. (2014-09-24)Retrievals of aerosol microphysical properties (effective radius, volume and surface-area concentrations) and aerosol optical properties (complex index of refraction and single-scattering albedo) were obtained from a hybrid ... -
Aerosol profiling with lidar in the Amazon Basin during the wet and dry season
Baars, H.; Ansmann, A.; Althausen, D.; Engelmann, R.; Heese, B.; Mueller, D.; Artaxo, P.; Paixao, M.; Pauliquevis, T.; Souza, R. (2012-11-03)For the first time, multiwavelength polarization Raman lidar observations of optical and microphysical particle properties over the Amazon Basin are presented. The fully automated advanced Raman lidar was deployed 60 km ... -
Aerosol-type classification based on AERONET version 3 inversion products
Shin, Sung-Kyun; Tesche, Matthias; Mueller, Detlef; Now, Youngmin (2019-07-11)This study proposes an aerosol-type classification based on the particle linear depolarization ratio (PLDR) and single-scattering albedo (SSA) provided in the AErosol RObotic NETwork (AERONET) version 3 level 2.0 inversion ... -
Aerosol-type-dependent lidar ratios observed with Raman lidar
Mueller, D.; Ansmann, A.; Mattis, I.; Tesche, Matthias; Wandinger, U.; Althausen, D.; Pisani, G. (2007-08-17)[1] We summarize our Raman lidar observations which were carried out in Europe, Asia, and Africa during the past 10 years, with focus on particle extinction-to-backscatter ratios ( lidar ratios) and (A) over circle ngstrom ... -
AIITS: Preliminary light scattering data from Tropical Tropopause Layer cirrus
Stopford, Chris; Kaye, Paul H.; Ulanowski, Joseph; Hirst, Edwin; Greenaway, Richard; Dorsey, James; Gallagher, Martin; Woods, Sarah; Lawson, Paul; Thornberry, Troy; Rollins, Drew; Harris, Neil (2015-07-22)The new optical particle spectrometer AIITS (Aerosol Ice Interface Transition Spectrometer) is the next instrument in the Small Ice Detector (SID) family. Like SID3, it acquires two-dimensional forward scattering patterns ... -
Airborne multiwavelength High Spectral Resolution Lidar (HSRL-2) observations during TCAP 2012 : Vertical profiles of optical and microphysical properties of a smoke/urban haze plume over the northeastern coast of the US
Mueller, D.; Hostetler, C. A.; Ferrare, R. A.; Burton, S. P.; Chemyakin, E.; Kolgotin, A.; Hair, J. W.; Cook, A. L.; Harper, D. B.; Rogers, R. R.; Hare, R. W.; Cleckner, C. S.; Obland, M. D.; Tomlinson, J.; Berg, L. K.; Schmid, B. (2014-10-10)We present measurements acquired by the world's first airborne 3 backscatter (β) + 2 extinction (α) High Spectral Resolution Lidar (HSRL-2). HSRL-2 measures particle backscatter coefficients at 355, 532, and 1064 nm, ... -
Airborne observations of dry particle absorption and scattering properties over the northern Indian Ocean
de Reus, Marian; Formenti, P.; Strom, J.; Krejci, R.; Mueller, D.; Andreae, M.O.; Lelieveld, J. (2002-11)[1] Airborne measurements of the absorption and scattering coefficients of dry aerosols, at 525 and 545 nm, respectively, were performed over the northern Indian Ocean during the Indian Ocean Experiment (INDOEX). In the ... -
Airborne particles in Swansea, UK : their collection and characterization
Price, Heather; Arthur, Robert; Sexton, Keith; Gregory, Clive; Hoogendoorn, Bastiaan; Matthews, Ian; Jones, Tim; BeruBe, Kelly (2010)Urban air particulate matter (PM) has previously been associated with a variety of adverse health effects. It is now believed that the smallest particles, ultrafine or nanoparticles, are linked to the greatest health ... -
Analysis of meteorology-chemistry interactions during air pollution episodes using online coupled models within AQMEII Phase-2
Kong, Xin; Forkel, Renate; Sokhi, Ranjeet; Suppan, Peter; Baklanov, Alexander; Gauss, Michael; Brunner, Dominik; Barò, Rocìo; Balzarini, Alessandra; Chemel, C.; Curci, Gabriele; Jiménez-Guerrero, Pedro; Hirtl, Marcus; Honzakj, Luka; Im, Ulas; Pérez, Juan; Pirovano, Guido; San Jose, Roberto; Schlünzenm, Heinke; Tsegas, George; Tuccella, Paolo; Werhahn, Johannes; Žabkar, Rahela; Galmarini, Stefano (2015-08)This study reviews the top ranked meteorology and chemistry interactions in online coupled models recommended by an experts’ survey conducted in COST Action EuMetChem and examines the sensitivity of those interactions ... -
Analysis of UK and European NOx and VOC emission scenarios in the Defra model intercomparison exercise
Derwent, Richard; Beevers, Sean; Chemel, C.; Cooke, Sally; Vazhappilly Francis, Xavier; Fraser, Andrea; Heal, Mathew R.; Kitwiroon, Nutthida; Lingard, Justin; Redington, Alison; Sokhi, Ranjeet; Vieno, Massimo (2014-09)Simple emission scenarios have been implemented in eight United Kingdom air quality models with the aim of assessing how these models compared when addressing whether photochemical ozone formation in southern England was ... -
Anharmonic quantum mechanical systems do not feature phase space trajectories
Oliva, Maxime; Kakofengitis, Dimitris; Steuernagel, Ole (2018-07-15)Phase space dynamics in classical mechanics is described by transport along trajectories. Anharmonic quantum mechanical systems do not allow for a trajectory-based description of their phase space dynamics. This invalidates ...