Browsing University of Hertfordshire by Author "Esselborn, Michael"

Now showing items 1-13 of 13

    • Airborne high spectral resolution lidar for measuring aerosol extinction and backscatter coefficients 

      Esselborn, Michael; Wirth, Martin; Fix, Andreas; Tesche, Matthias; Ehret, Gerhard (2008-01-14)
      An airborne high spectral resolution lidar (HSRL) based on an iodine absorption filter and a high-power frequency-doubled Nd:YAG laser has been developed to measure backscatter and extinction coefficients of aerosols and ...

    • Depolarization ratio profiling at several wavelengths in pure Saharan dust during SAMUM 2006 

      Freudenthaler, Volker; Esselborn, Michael; Wiegner, Matthias; Heese, Birgit; Tesche, Matthias; Ansmann, Albert; Mueller, D.; Althausen, Dietrich; Wirth, Martin; Fix, Andreas; Ehret, Gerhard; Knippertz, Peter; Toledano, Carlos; Gasteiger, Josef; Garhammer, Markus; Seefeldner, Andmeinhard (2009-02)
      Vertical profiles of the linear particle depolarization ratio of pure dust clouds were measured during the Saharan Mineral Dust Experiment (SAMUM) at Ouarzazate, Morocco (30.9 degrees N, -6.9 degrees E), close to source ...

    • Desert dust aerosol air mass mapping in the western Sahara, using particle properties derived from space-based multi-angle imaging 

      Kahn, Ralph; Petzold, Andreas; Wendisch, Manfred; Bierwirth, Eike; Dinter, Tilman; Esselborn, Michael; Fiebig, Marcus; Heese, Birgit; Knippertz, Peter; Mueller, D.; Schladitz, Alexander; Hoyningen-Huene, Andwolfgang Von (2009-02)
      Coincident observations made over the Moroccan desert during the Sahara mineral dust experiment (SAMUM) 2006 field campaign are used both to validate aerosol amount and type retrieved from multi-angle imaging spectroradiometer ...

    • Doppler lidar studies of heat island effects on vertical mixing of aerosols during SAMUM-2 

      Engelmann, Ronny; Ansmann, Albert; Horn, Stefan; Seifert, Patric; Althausen, Dietrich; Tesche, Matthias; Esselborn, Michael; Fruntke, Julia; Lieke, Kirsten; Freudenthaler, Volker; Gross, Silke (2011-09-01)
      A wind Doppler lidar was deployed next to three aerosol lidars during the SAMUM-2 campaign on the main island of Cape Verde. The effects of the differential heating of the island and the surrounding ocean and the orographic ...

    • Dust mobilization and aerosol transport from West Africa to Cape Verde-a meteorological overview of SAMUM-2 

      Knippertz, Peter; Tesche, Matthias; Heinold, Bernd; Kandler, Konrad; Toledano, Carlos; Esselborn, Michael (2011-09-01)
      The second field campaign of the SAharan Mineral dUst experiMent (SAMUM-2) was performed between 15 January and 14 February 2008 at the airport of Praia, Cape Verde, and provided valuable information to study the westward ...

    • Microphysical and optical properties of dust and tropical biomass burning aerosol layers in the Cape Verde region-an overview of the airborne in situ and lidar measurements during SAMUM-2 

      Weinzierl, Bernadett; Sauer, Daniel; Esselborn, Michael; Petzold, Andreas; Veira, Andreas; Rose, Maximilian; Mund, Susanne; Wirth, Martin; Ansmann, Albert; Tesche, Matthias; Gross, Silke; Freudenthaler, Volker (2011-09-01)
      In the framework of the Saharan Mineral Dust Experiment (SAMUM) airborne High Spectral Resolution Lidar and in situ measurements of the particle size, aerosol mixing state and absorption coefficient were conducted. Here, ...

    • Profiling of Saharan dust and biomass-burning smoke with multiwavelength polarization Raman lidar at Cape Verde 

      Tesche, Matthias; Gross, Silke; Ansmann, Albert; Mueller, D.; Althausen, Dietrich; Freudenthaler, Volker; Esselborn, Michael (2011-09)
      Extensive lidar measurements of Saharan dust and biomass-burning smoke were performed with one airborne and three ground-based instruments in the framework of the second part of the SAharan Mineral dUst experiMent (SAMUM-2a) ...

    • 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 ...

    • Solar radiative effects of a Saharan dust plume observed during SAMUM assuming spheroidal model particles 

      Otto, Sebastian; Bierwirth, Eike; Weinzierl, Bernadett; Kandler, Konrad; Esselborn, Michael; Tesche, Matthias; Schladitz, Alexander; Wendisch, Manfred; Trautmann, Thomas (2009-02-02)
      The solar optical properties of Saharan mineral dust observed during the Saharan Mineral Dust Experiment (SAMUM) were explored based on measured size-number distributions and chemical composition. The size-resolved complex ...

    • Spatial distribution and optical properties of Saharan dust observed by airborne high spectral resolution lidar during SAMUM 2006 

      Esselborn, Michael; Wirth, Martin; Fix, Andreas; Weinzierl, Bernadett; Rasp, Katharina; Tesche, Matthias; Petzold, Andreas (2009-02-02)
      Airborne measurements of pure Saharan dust extinction and backscatter coefficients, the corresponding lidar ratio and the aerosol optical thickness (AOT) have been performed during the Saharan Mineral Dust Experiment 2006, ...

    • Vertical profiling of Saharan dust with Raman lidars and airborne HSRL in southern Morocco during SAMUM 

      Tesche, Matthias; Ansmann, Albert; Mueller, D.; Althausen, Dietrich; Mattis, Ina; Heese, Birgit; Freudenthaler, Volker; Wiegner, Matthias; Esselborn, Michael; Pisani, Gianluca; Knippertz, Peter (2009-02)
      Three ground-based Raman lidars and an airborne high-spectral-resolution lidar (HSRL) were operated during SAMUM 2006 in southern Morocco to measure height profiles of the volume extinction coefficient, the extinction-to ...

    • Vertically resolved dust optical properties during SAMUM : Tinfou compared to Ouarzazate 

      Heese, Birgit; Althausen, Dietrich; Dinter, Tilman; Esselborn, Michael; Müller, Thomas; Tesche, Matthias; Wiegner, Matthias (2009-02-02)
      Vertical profiles of dust key optical properties are presented from measurements during the Saharan Mineral Dust Experiment (SAMUM) by Raman and depolarization lidar at two ground-based sites and by airborne high spectral ...