Sökning: "Atmospheric Boundary Layer"

Visar resultat 11 - 15 av 28 uppsatser innehållade orden Atmospheric Boundary Layer.

1. 11. Cloud Streets. A Study of the Instability Mechanisms Giving Rise to Boundary Layer Rolls

   Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Josefine Bergstedt; [2020]
   Nyckelord :Cloud streets; boundary layer rolls; dynamic instability; thermal instability; horizontal con- vective rolls; inflection point;

   Sammanfattning : Boundary layer rolls are a rather frequent phenomena, where regions of alternating up- and downdraft motion causes clouds to form in elongated, parallel rows oriented with the mean wind direction. The clouds can be seen during certain atmospheric conditions and are often called ”cloud streets” because of their characteristic appearance. LÄS MER

3. 12. Study of spatial and temporal variation of atmospheric optical parameters and their relation with PM 2.5 concentration over Europe using GIS technologies

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Panagiotis Symeonidis; [2017]
   Nyckelord :aerosols; air quality; satellite remote sensing; GIS; geography; Geographical Information Systems; particulate matter; Aerosol Optical Depth; MODIS; Earth and Environmental Sciences;

   Sammanfattning : The purpose of this study was to examine the use of remote sensing aerosol data as an estimator of ground level fine particulate matter concentration (PM 2.5). In order to examine this possible relation, daily MODIS Aerosol Optical Depth (AOD) data were used, collected for an entire year. LÄS MER

4. 13. Quantifying the Shadow Effect between Offshore Wind Farms with Idealized Mesoscale Models and Observed Wind Data

   Magister-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :David Werner; [2016]
   Nyckelord :Shadow effect; offshore wakes; atmospheric stability; analog ensemble; wake forecasting; idealized mesoscale modeling; Weather Research Forecast WRF model; downscaling; North Sea; Princes Amalia; Egmond aan Zee;

   Sammanfattning : Two post processing methods for quantifying the shadow effect of the offshore wind farm Princes Amalia (PA) onto Egmond aan Zee (OWEZ) wind farm are analyzed and benchmarked. The first method is the author’s proposed shadow effect determination method (SEDM), which quantifies an offshore wind farm’s shadow effect based on mesoscale WRF (Weather Research Forecast) idealized modeling and the observed frequency of the analyzed site’s wind conditions. LÄS MER

5. 14. Measurement of the convective heat transfer with wind : Developing and testing an Earth Scaled Atmospheric Temperature Sensor

   Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Författare :Philipp Wittmann; [2016]
   Nyckelord :Wind; ATS; heat transfer; air temperature sensor; atmospheric temperature sensor;

   Sammanfattning :    The HAbitability, Brine Irradiation and Temperature Package (HABIT) instrument of the ExoMars Surface Platform will investigate the present day habitability of Mars at the near surface environment. This instrument includes three Atmospheric Temperature Sensor's (ATS's) which are similar to the ones previously used on the Rover Environmental Monitoring Station (REMS) of the Mars Science Laboratory (MSL) rover, that has now been operating on Mars for more than four years. LÄS MER

7. 15. Numerical Modelling of Convective Snow Bands in the Baltic Sea Area

   Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Julia Jeworrek; [2016]
   Nyckelord :Shallow convection; extreme precipitation; Baltic Sea; SST; regional climate system modelling;

   Sammanfattning : Convective snow bands develop commonly over the open water surface of lakes or seas when cold airgets advected from a continent. Enhanced heat and moisture fluxes from the comparatively warm waterbody trigger shallow convection and an unstable boundary layer builds up. LÄS MER