Geophysical laboratory I / II (Academic year 2020/2021)

dr hab. Iwona S. Stachlewska

Rok akademicki: 2020/2021
Semestr: zimowy/letni


Geophysical Laboratory  I (summer semester) / II (winter semester)

Rules for Academic year 2020/2021 (both semesters)

Field of study: Geophysics (Physics, II degree)

Organizational unit: Institute of Geophysics, Faculty of Physics, University of Warsaw

Coordinator: Iwona Stachlewska (iwona.stachlewska@fuw.edu.pl)

Tutors: Gustavo Abade, Daniel Albuquerque, Grzegorz Florczyk, Robert Grosz, Łucja Janicka, Konrad Kossacki, Szymon Malinowski, Krzysztof Markowicz, Pablo Ortiz-Amezcua, Hanna Pawłowska, Iwona Stachlewska, Dominika Szczepanik, Dongxiang Wang, Olga Zawadzka-Mańko, Piotr Żmijewski.

Important information Summer Semester 2020/2021:

The summertime exam session ended on 4.07.2021. 
Thus tutors will assess and give mark only to the reports that were submitted BEFORE that date.
No report submitted equals mark 2. Now we are in holiday-period. Therefore, for the late submissions (or corrections) of the reports,
if any after 4.07.2021, tutors will assess them within the make-up session between 30.08–12.09.2021. No reports can be submitted after 12.09.2021.


The aim of the Laboratory is to familiarize students with experimental and theoretical methods and advanced analysis of geophysical data. The thematic scope of the proposed exercises includes topics in atmospheric physics, lithosphere physics and planetology.

The laboratory consists of performing three (GL II winter semester) or four (GL I semester) exercises.

Descriptions of the proposed exercises with names of tutors are listed below.

Literature is determined by tutors, according to the individual topic and scope of the exercise.

Assessment of the final grade is based on the student's reports on the selected exercises (3 for GL II and 4 for GL I). Each report is evaluated by the tutor. The final grade is the average of the ratings obtained from the individual reports. Lack of performing the given above the obligatory number of exercises results in failing the subject!

The laboratory is realized solely in English.

Student workload:
- preparation for exercises 30h (GL II), 40h (GL I)
- exercises 30h (GL II), 30h (GL I)
- preparation of results and preparation of reports 30h (GL II), 40h (GL I)


Due to the COVID-19 situation, there are no restrictions on the number of students performing each exercise and no restrictions on the number of exercises conducted by tutors!

Students that have performed a certain exercise in the previous semesters are not allowed to perform the same exercise in the current semester! In the submitted reports students are obligated to add information: "Herewith, I declare that I have not performed this exercise in any of the previous semesters".

Tutors are obligated to check for plagiarism and add information: "No plagiarism detected", along with the grade, date, and signature on the first page of each evaluated report. The scan/photo of this page has to be provided by the tutor to the coordinator asap.


1. The student selects the exercises from the list below and contacts the tutors to confirm that the exercise can be performed in a given semester.
2. Information about selected and confirmed exercises must be communicated by the student to the GL coordinator within 1 month of the beginning of the semester.
3. The student carries out each exercise under the tutor's supervision.
4. After completing the exercise, the student prepares a report and submits it for review by the tutor.
5. The coordinator receives an evaluated final report (with grade) from the student by the end of the exam session.
6. The report must contain the following information in the heather: Name of the laboratory: Geophysical Laboratory I (summer) or Geophysical Laboratory II (winter); academic year: 2020/2021; full title of the exercise; name and surname of tutor; name and surname of the student; student registration number at UW (USOS); date on which the first report is submitted to tutor, and if necessary - the date of the revision of the report.
7. The report must be written in the English language.
8. Failure to submit the graded report to the coordinator by the end of the exam session of a given semester means an unsatisfactory grade from the given exercise.
9. The final grade obtained by the student is the average of the ratings of the individual reports (3 grades for GL II and 4 grades for GL I, including the unsatisfactory grades.
10. The coordinator proposes the final grade to the student no later than one week before the end of the exam session.
11. The final grade is inserted to USOS on the last day of the exam session.
12. It is possible to improve each report until the end of the make-up session of a given semester.
13. The final grade is then the average of 3 (GLII) or 4 (GL I) grades (highest grade per exercise).

Materiały do zajęć

Zajęcia / Prowadzący Typ zajęć

Łucja Janicka, Dominika Szczepanik, Iwona S. Stachlewska

The ground-based lidars data sets of the EMORAL lidar in Rzecin and the PollyXT and NARLa lidar data in Warsaw will be verified against the satellite Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) of the European Space Agency (ESA). The ADM-Aeolus is the first satellite with equipment capable of performing global wind profile observation with aim to improve weather forecasting. It is capable of observing the wind profiles from the Earth surface up to the lower stratosphere (0-30 km). The wind-component profiles are measured by the Atmospheric LAser Doppler INstrument (ALADIN). As the basis of the measurement is Doppler effect the instrument is providing indirectly also an information of the aerosol load structure in the atmosphere.

In the frame of this task the student will perform the verification of the lidar data that are already evaluated by RS-Lab Team with the Single Calculus Chain of the ACTRIS. The task is covering data download for SCC and careful verification of the overpasses times against the calculate profiles (+/-1h availability), writing the profiles plotting routine to display the data, define the robust terms to assess their quality, and make a decision of their usefulness for the ADM-Aelous measurements verification.


Radosław Mieszkowski, Iwona S. Stachlewska

Magnetic survey is a near-surface experimental geophysics method broadly used in environmental investigations. Magnetometers measure disturbances in the Earth's magnetic field. The exercise aims at introducing students to the subject of the magnetic research, which is one of the most important and broadly applied geophysical methods. A magnetometer will be used to detect features which may induce local variations of the magnetic field. The magnetometer data will be acquired and processed by the student with the use of a dedicated software. The data will be visualized, analyzed and interpreted. 


Retrieval of atmospheric boundary layer top using lidar and/or ceilometer data in NRT. Analyses of diurnal variability of boundary layer at urban and rural site. Comparisons with boundary layer derived form models (WRF, ECMWF).


The finite inertia of droplets in a turbulent fluid causes droplets to diverge from regions of high vorticity and to converge preferentially in regions of low vorticity. This creates strong deviations from uniformity in droplet concentration. The aim of the exercise is to simulate the motion of droplets (modeled as point-particles) in a synthetic turbulent flow under the influence of gravity. Simulation results should explain to what extent droplet inertia, gravity, and turbulence affect droplet spatial distribution.


The aim of this exercise is to study processes of formation and evolution of cloud droplets. It will be realized using an existing numerical parcel model (https://github.com/igfuw/parcel). Main tasks include:  getting acquainted with the model documentation, installation of the model, running of a set of numerical simulations. Results obtained will have to be thoroughly analyzed in order to identify parameters having impact on droplet size distribution. Realization of this exercise will result in effective understanding of parcel model as a tool used in numerical simulations of cloud processes, and also deeper understanding of cloud microphysical processes.


The rate of sublimation is commonly calculated using simple Hertz-Knudsen equation. This equation was derived ignoring microstructure of material and assuming equilibrium distribution of the velocities of molecules condensing on the surface and leaving it. Thus, is it gives only approximate result. It can be corrected using temperature dependent sublimation coefficient (e.g. Kossacki et al. 1999; Gundlach et al. 2011; Kossacki et al. 2017). 

Exercise: Sublimation of ice is investigated in laboratory, using cooled vacuum chamber. Measured parameters are: position of the surface and the temperature. Student is expected to perform measurement and derive the temperature dependent rate of sublimation.

This exercise is dedicated to advanced student.

Note that, due to the COVID-19 situation, the student will receive raw measurement data for analysis.


The exercise is aimed at determination of the thermal conductivity of granular ice, or natural snow (if it is available) without sampling the test material. The measurement is made using linear probe technology. It is used in practice in situations when taking a sample of the material is inexpedient or technically impossible. This method is applied to investigate directly (in-situ) properties of cosmic bodies using automatic landing probes, e.g. comet Churyumov-Gerasimenko (mission Rosetta, experiment MUPUS).

Idea is the following: changes of the temperature of a long thin heater inserted in a solid material is a function of its thermal conductivity. When the heating power is known it is sufficient to register  changes of the temperature. The latter can be done automatically. 

Student is expected to perform 2 -3 measurements and analyze the source data. 

This exercize is dedicated to advanced student.

Note that, due to the COVID-19 situation, the student will receive raw measurement data for analysis.


The purpose of the exercise is to analyze EMORAL lidar measurement data collected during field campaign over the Natura 2000 peatland in Rzecin. The profiles of particle extinction and backscattering coefficients, depolarization ratio and water vapor mixing ratio will be derived. The student will use available lidar measurements and a set of calibration measurements for this purpose. He will write numerical programs for calculation of profiles and estimate measurement errors. Finally he/she will interpret the obtained results.


The aim of the exercise is to derive profiles of aerosol optical properties, depolarization ratio and relative humidity, so as to characterize the atmosphere using the signals of ADR-PollyXT lidar and NARLa lidar. The student will use available lidar observations in combination with weather profiling of radiosounding and photometric measurements. The data will be processed using available numerical programs, including estimates of measurement errors. For the analysis and interpretation of the processed data, the student will use the methodology proposed by him/herself.


The exercise is to define a methodology for synergistic data analysis of the ESA EMORAL lidar and the LATMOS BASTA cloud radar profiles to predict the tempo-spatial distribution of aerosol and clouds in the atmosphere. The key issue here will be (a) correctly calibrating the measurements taken by both devices and b) setting and optimising signal thresholds to distinguish different types of aerosol and clouds.


The AERONET (AErosol RObotic NETwork) program is a federation of ground-based remote sensing aerosol networks established by NASA and LOA-PHOTONS (CRNS) and provides a long-term, continuous and readily accessible public domain database of aerosol optical, microphysical and radiative properties. The standardization of instruments, calibration, and processing by the network allows for directly comparing aerosol properties from different environments. This exercise is intended to focus on the characterization of aerosol load, optical and physical properties as well as on their temporal variability over a rural site versus Warsaw urban site using long-term measurements with AERONET sun-photometers.


NOTE: This topic is open for realization only for students who already have experience with atmospheric physics!

The exercise aims at familiarizing students with the basic microphysical properties of clouds (concentration and size of cloud droplets), their variability in space, and their dependence on the type of cloud. The exercise will involve the analysis of the measurement data from the ACE2 (Second Aerosol Characterization Experiment, Canary Islands) and the RICO (Rain in Cumulus over the Ocean; Caribbean, 2004-2005) experiments carried out in Stratocumulus and Cumulus clouds, respectively. The implementation of this exercise will allow students to effectively learn the basic (and more advanced) parameters characterizing clouds, understand and remember which are the most important processes that govern clouds.

Dokumenty do zajęć:
Instrukcja do ćwiczenia z eksperymentu ACE2
Dane z lotu fr9721 eksperymentu ACE2
Dane z lotu fr9730 eksperymentu ACE2
Publikacja ACE2
Publikacja ACE2
Publikacja ACE2
Publikacja ACE2
Instrukcja do ćwiczenia z eksperymentu RICO
Dane z lotu RF06 eksperymentu RICO
Dane z lotu RF07 eksperymentu RICO
Publikacja RICO
Publikacja RICO
Adiabatic Liquid Water Content

Data files of the CHM15k Lufft ceilometer and C318 CIMEL photometer need to bee looked at from the perispective of use for the calculations of the atmospheric correction. The data collected during the Atmo-FLEX campaign will be evaluated in terms of deriving boundary layer and optical depth. Comparative study will follow.


Doppler lidar system allows for obtaining vertical profiles of wind vector within the atmospheric boundary layer with high spatial and temporal resolution for atmospheric applications. The aim of this exercise is to be able to filter and process the data to properly represent, understand and interpret different patterns observed with Doppler lidar (e.g. related to nocturnal jets or daytime convection). The analysis will cover several examples measured over a peatland site close to Rzecin (Poland).


The aim of the exercise if comparative analysis of atmospheric boundary layer (ABLH) form lidar observations conducted during one of the field campaigns with ESA MObile RAman Lidar (EMORAL) in Poland. Two main tasks are to be done. First, a technical one is to derive ABLH using wavelet method. Second, a scientific one is to explain the differences in ABLH in terms of the nocturnal (NL) and residual (RL) layers at night and the well-mixed (WML) layer at daytime. 


Mixed-phase clouds are three-phase systems consisting of water vapor,
ice particles and supercooled liquid droplets. In this exercise the
student will model and simulate the phase partitioning of water
condensate in mixed-phase clouds using a bulk microphysical
approach. Simulations will be made for the adiabatic cloud parcel
model. We plan the following course of the exercise: learning the
model equations and the thermodynamics of mixed-phase systems, developing
the numerical code and conducting calculations for various model
parameters. The simple modeling approach used in this exercise should
provide reference results for testing and development of more
sophisticated microphysical schemes.


The exercise is aimed at determination of the thermal conductivity of sand without sampling the test material. The measurement is made by linear probe technology. It is used in practice in situations when taking a sample of the material is inexpedient or technically impossible. This method is applied to investigate directly (in-situ) properties of cosmic bodies using automatic landing probes, e.g. comet Churyumov-Gerasimenko (mission Rosetta, experiment MUPUS).

Idea is the following: changes of the temperature of a long thin heater inserted in a solid material is a function of its thermal conductivity. When the heating power is known it is sufficient to register changes of the temperature. The latter can be done automatically.

Student is expected to perform 2 -3 measurements and analyze the source data.

Alternatively, student may process the existing source data.

This exercise is dedicated for beginner student.


The aim of the exercise is to derive the aerosol depolarization profiles (UV and VIS) and the water vapour mixing ratio from the European Space Agency Mobile Aerosol Raman EMORAL lidar signals. Student will use available lidar measurements for three cases: 1) Rayleigh atmosphere, 2) air-mass of biomass combustion, and 3) air mass of mineral dust. She/He will write numerical programs for the retrieval of water vapor profiles and depolarization in the atmosphere, estimate the measurement uncertainties, and perform a comparative analysis of the three cases.


The exercise aims at familiarizing students with the topics of satellite remote sensing, widely used in atmospheric research. As part of the classes, student will conduct analyses of satellite data for a given case study (to be determined together with supervisor), in terms of various parameters, such as atmospheric aerosols, cloudiness, anthropogenic pollution.



Size distribution of droplets and their concentration in a unit volume are basic microphysical properties characterizing the cloud. Knowing both, one can also calculate total liquid water content. The goal of the exercise is to introduce the method of measuring those parameters with shadowgraphy. Student’s tasks include the lab measurement of droplet sizes and concentrations in the streams generated by a few different devices (e.g. pond mist maker, household humidifier, flower sprayer, nasal hygiene spray), comparing the properties of the obtained size distributions and estimating total liquid water content.

For ambitious: The second goal of the exercise is to introduce optical techniques for measuring size distribution and fall velocity of rain drops, as well as rainfall rate. Student task’s involve selecting the proper experiment time based on weather forecast, measuring rain drop sizes and velocities at the roof of the institute building with shadowgraphy technique and comparing the results with routine observations performed with a disdrometer.

Dokumenty do zajęć:
Measurement of cloud droplet size and concentration with shadowgraphy - instructions - Skrypt do ćwiczeń