The current cloud thermodynamic phase discrimination by Cloud-Aerosol Lidar Pathfinder Satellite Observations (CALIPSO) is based on the depolarization of backscattered light measured by its lidar [CloudAerosol Lidar with Orthogonal Polarization (CALIOP)]. It assumes that backscattered light from ice crystals is depolarizing, whereas water clouds, being spherical, result in minimal depolarizatio...

Abstract Atmospheric particulate is one of the main causes performance degradation in gas turbine engines, especially aeronautical field where filter barriers are absent. The ingested particles can stick to blade surfaces engine, varying their shape and roughness. As a consequence, engine takes place. type amount depend on flight zones altitude. During missions, aircrafts follow prescribed path...

This thesis presents a new technique to identify a 2D mask showing the extent of particulate aerosol distributions in satellite imagery. This technique uses a supervised texture classification approach, and utilises data from two distinct satellite sources. The vertical feature mask (VFM) product from the CALIPSO lidar, provides an accurate description of the aerosol content of the atmosphere b...

[1] In 2004 NASA plans to launch the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations— CALIPSO mission, with a two-wavelength lidar aboard. CALIPSO will fly in formation with the Moderate Resolution Imaging Spectro-Radiometer (MODIS) on the Aqua satellite. Here we present inversions of combined aircraft lidar and MODIS data to study the properties of smoke off the southwest co...

This study evaluates the potential to determine the global distribution of hydrated aerosols based on Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) data products. Knowledge of hydrated aerosol global distribution is of high relevance in the study of the radiative impact of aerosol-cloud interactions on Earth’s climate. The cloud-aerosol discrimination (CAD) score ...

We have developed the Multiple Field of view Multiple Scattering Polarization Lidar (MFMSPL) system for the study of optically thick low-level clouds. It has 8 telescopes; 4 telescopes for parallel channels and another 4 for perpendicular channels. The MFMSPL is the first lidar system that can measure depolarization ratio for optically thick clouds where multiple scattering is dominant. Field o...

[1] We identify the top of the tropical tropopause layer (TTL) by analyzing the vertical mass flux profile based on radiative transfer calculations employing observed atmospheric profiles and cloud information. We find that the top of the TTL is located at 18.7 km (70 mb). We have analyzed the CALIPSO lidar cloud observations from June 2006 to February 2007, which indicates that almost no cloud...

An examination of 2yr of Cloud–Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) lidar observations and CloudSat cloud radar observations shows that ice clouds at temperatures below about 2458C frequently fall below the CloudSat radar’s detection threshold yet are readily detectable by the lidar. The CALIPSO icewater content (IWC)detection threshold is about 0.1 versus 5mgm for...

Abstract. Aerosol distributions have a potentially large influence on climate-relevant cloud properties but can be difficult to observe over the Arctic given pervasive cloudiness, long polar nights, data paucity remote regions, and periodic diamond dust events that satellites misclassify as aerosol. We compared 2008–2015 mineral combustion aerosol from Cloud-Aerosol Lidar Infrared Pathfinder Sa...