IGF



Master of Science Dissartation

Nowa metoda wyznaczania zmienności wysokości atmosferycznej warstwy granicznej z pomiarów lidarowych

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Maciej Karasewicz

dr hab. Iwona S. Stachlewska, prof. ucz.

Uniwersytet Warszawski, Wydział Fizyki

2022

The atmospheric boundary layer (ABL) is the lowest part of the atmosphere. Because of its sensitivity to all atmospheric parameters, ABL is highly variable over time. Knowledge of ABL and its parameters plays an important role in the study of air pollution, meteorology, hydrology and forecasting of weather and climate. The analysis of the ABL is one of the topics conducted by the Remote Sensing Laboratory (RS-Lab) at the Institute of Geophysics at the Faculty of Physics UW (IGF FUW). One of the laboratory’s current projects is the technical support for the Polish Radar and Lidar Mobile Observation System (POLIMOS). The project is funded by the European Space Agency (ESA) and deals with the effects of optical atmospheric properties on terrestrial ecosystems. Based on the evaluation of EMORAL lidar (ESA Mobile Raman Lidar) data, the heights for the different layers in ABL, for one day of observation, were determined. The evaluated data came from the measurement campaign: POLIMOS Krakow – SMOG 2022, which took place on 10-30th January 2022. The measurements were carried out on the campus of the Faculty of Physics and Applied Computer Science of the AGH University of Science and Technology in Krakow (FIS AGH). In the master’s thesis different methods were presented and used to determine the atmospheric boundary layer height (ABLH) by analyzing the backscatter signal. Moreover, a new method for the determination of ABLH, based on the graphic analysis of the tempo-spatial graph of the backscatter signal values, was presented. The values of the layers height in ABL, determined by the new method, were highly similar with with the heights determined by the reference method (R2 = 0.888). On the obtained profile of the height of the layers in ABL, in the function of the time, typical ABL behavior can be observed, such as: variability of the height for different layers, beginning and end of convection processes in ABL and thus the solar cycle during the day.


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