Essays about: "cloud top height"

Showing result 1 - 5 of 6 essays containing the words cloud top height.

  1. 1. Improving Short-Range Cloud Forecasts in Harmonie-Arome Through Cloud Initialization Using Mesan Cloud Data

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Joakim Pyykkö; [2019]
    Keywords : cloud initialization; HARMONIE-AROME; MESAN; satellite product; synoptic weather station;

    Abstract : Previous studies, such as van der Veen (2012) and White et al. (2017), have demonstrated the potential of using measurement-based cloud data to improve Numerical Weather Prediction (NWP) based cloud forecasts. This can be done through cloud initialization; a process of injecting cloud data after the regular data assimilation in an NWP model. READ MORE

  3. 2. Deriving characteristics of thin cirrus clouds from observations with the IRF lidar

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Jennifer Edman; [2019]
    Keywords : cirrus; lidar; polar regions; optical thickness; clouds; ice clouds; BSR; backscatter coefficient;

    Abstract : Cirrus clouds play an important role in radiative transfer, and thus have impact on the energy balance of the atmosphere and the climate of the Earth. Furthermore, they occur often and cover large areas globally at any time. Nevertheless, cirrus clouds are poorly studied, especially in the polar regions. READ MORE

  4. 3. Towards a quality control for cloud top pressure and cloud top height products

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Oscar Nyman; [2017]
    Keywords : remote sensing; cloud top pressure; atmospheric radiation;

    Abstract : Cloud top height plays an important roll in the energy budget and is also important for aviation. This thesis concerns the quality control of cloud top height (CTH) retrievals. The approach for quality controlling retrieved CTH has been using the forward simulating software RTTOV. READ MORE

  5. 4. Retrieval of Cloud Top Pressure

    University essay from Linköpings universitet/Institutionen för datavetenskap; Linköpings universitet/Tekniska fakulteten

    Author : Claudia Adok; [2016]
    Keywords : neural networks; multilayer perceptron; random forest regression; cloud top pressure; cloud top height;

    Abstract : In this thesis the predictive models the multilayer perceptron and random forest are evaluated to predict cloud top pressure. The dataset used in this thesis contains brightness temperatures, reflectances and other useful variables to determine the cloud top pressure from the Advanced Very High Resolution Radiometer (AVHRR) instrument on the two satellites NOAA-17 and NOAA-18 during the time period 2006-2009. READ MORE

  6. 5. RETRIEVING THE HEIGHT OF THE PLANETARY BOUNDARY LAYER OVER STOCKHOLM FROM LIDAR MEASUREMENTS

    University essay from Lunds universitet/Fysiska institutionen

    Author : Ewa Johansson; [2013]
    Keywords : Planetary Boundary Layer; Meteorology; weather forecast; Raman LIDAR; Physics and Astronomy;

    Abstract : LIDAR data from the Polly system on the roof of the Arrhenius laboratory at Stockholm University are used to determine the planetary boundary layers (PBL) height distribution. To this end, a wavelet covariance transform method is employed to analyze LIDAR measured data signals from the years 2011-2012. READ MORE