Supervisor: Assoc. Prof. Marzena Osuch

DR HAB. INŻ. MARZENA OSUCH, PROF. PAN

tel.: +48 22 6915-856 e-mail: marz@igf.edu.pl

The PhD position is offered by the Institute of Geophysics, Polish Academy of Sciences within the National Science Center of Poland project i.e. Hindcasting and projections of hydro-climatic conditions of Southern Spitsbergen.

The main focus of the PhD will be an analysis of rainfall-runoff processes in the Arctic catchments located in South Spitsbergen, the largest island of the Svalbard archipelago. The behavior of river catchments, in conjunction with glaciers, permafrost and biotic elements, is undoubtedly one of the most important indicators of climate and environmental change in the Arctic. The main aim will be an updated water-balance study based on meteorological, hydrological, and glacier mass-balance monitoring from previous years and projections for the future. Due to complexity of cold region hydrological systems, a catchment response can vary depending not only on climate forcing but also on catchment properties including: the state and distribution of permafrost, water storage capacity, glacial coverage, soil properties, elevation, and geomorphology.

He/She should have a Master of Science Degree or equivalent qualification in hydrology, climatology or a closely related discipline.

The ideal candidate should be familiar with hydrological measurements, remote sensing methods, statistical data analysis, and be familiar with programming (MATLAB, R) and GIS (e.g. ArcGis).

The candidate will be expected to work partially in the Arctic. He/she will be expected to attend at least one international conference per year, so fluent English is obligatory. All general enquiries and formal applications including: letter of motivation, current CV, copies of certificates, list of courses with grades taken during MSc and BSc studies, (all in Polish or English) should be send to Dr Osuch (marz@igf.edu.pl).

tel.: +48 22 6915-862
e-mail: kochanek@igf.edu.pl

Although the mechanisms of the rainfall-runoff processes in river catchments are relatively well identified and documented in the hydrological literature. On the other hand, the problem of the accurate modelling of the precipitation pattern still creates the room for improvements. Insufficient monitoring of precipitation, its significant variability both in terms of spatial and temporal distribution result in substantial uncertainty of this input data and make it difficult to assess the real water capacity introduced to the modelled catchment.

The PhD research consist on the modelling of the runoff from a river catchment for various pre-selected scenarios of the precipitation distribution, both temporal and spatial. Furthermore, the most potentially dangerous patterns from the point of view of culmination flows in the selected profile (e.g. closing cross-section) will be indicated. As a case study we propose the River San catchment (South-East Poland), because it is highly diversified in terms of hydrological, geographical and social conditions. Except from the regular precipitation and discharge data available in the Institute of Meteorology and Water Management (IMGW), the radar precipitation data will be employed (also prepared by the IMGW), together with synthetic scenarios (i.e. based on computer modelling) of the rainfall spatial coverage and magnitude.

Requirements for candidates:

• MSc in hydrology or geophysics or environmental sciences or technical sciences (engineering);
• Math literacy, basic knowledge of hydrological processes, hydraulics, GIS;
• English reading/writing/speaking at least at the level enabling understanding of scientific publications and interactions with international collaborators;
• Programming skills in any computer language;
• Knowledge of Polish language will be an additional asset.

tel.: +48 22 6915-862
e-mail: kochanek@igf.edu.pl

tel.: +48 22 6915-862
e-mail: kochanek@igf.edu.pl

Supervisor: Assoc. Prof. Krzysztof Mizerski

tel.: +48 22 6915 904
e-mail: kamiz@igf.edu.pl

Description of tasks:

The task of the student will be involve analysis of the so-called Magnetic Buoyancy Instability (MBI) and its relation to hydro-magnetic dynamo in the solar interior. The study will be concerned with a model of the solar tachocline – a region of large shear, where the Solar toroidal field is greatly amplified. The Ph.D. student will be required to do both, the theoretical and numerical analysis of the dynamical equations, that is the Navier-Stokes equation with the Lorentz force and the induction equation resulting from Maxwell’s and Ohm’s laws. The ultimate aim of the project is to establish the effective dynamical equations governing the magnetic field evolution in the Solar tachocline, based on the temporal and spatial scales introduced by the MBI.  The next step is to solve the derived set of equations via numerical methods, which would allow to model the time evolution of the Solar magnetic field.

Requirements:

1. Participant of the doctoral studies, working on the preparation of the doctoral dissertation in the field of mathematics, physics or engineering, preferably fluid dynamics.
2. Solid basis in the fields of mathematics and physics (candidates who graduated from physical and/or mathematical faculties are preferred).
3. Programming skills (e.g. C, FORTRAN, PYTHON etc.).

Experience in the fields of fluid dynamics and/or electrodynamics is greatly welcome.

Additional funding from NCN: SONATA BIS 7 – ST3.

Supervisor: Assoc. Prof. Krzysztof Mizerski

tel.: +48 22 6915 904
e-mail: kamiz@igf.edu.pl

Description of tasks:

The task of the student will be to analyse numerically new mechanisms of generation of planetary and stellar magnetic fields, within the framework of the mean field theory. The mechanisms are based on interactions of distinct waves and through that formation of a large-scale electromotive force. Particularly effective are beating waves and nonlinear interactions. Both the linear limit of weak fields as well as the process of nonlinear saturation will be analysed. The aim of the project is the investigation of the mechanism of generation of large scale fields in nature (identified in Mizerski, Bajer & Moffatt, J. Fluid Mech. 707, 111, 2012) and their nonlinear evolution in systems with negligibly small magnetic diffusion.

Requirements:

1. Participant of the doctoral studies, working on the preparation of the doctoral dissertation in the field of mathematics, physics or engineering, preferably fluid dynamics.
2. Solid basis in the fields of mathematics and physics (candidates who graduated from physical and/or mathematical faculties are preferred).
3. Programming skills (e.g. C, FORTRAN, PYTHON etc.).

Experience in the fields of fluid dynamics and/or electrodynamics is greatly welcome.

Supervisor: Assoc. Prof. Krzysztof Mizerski

tel.: +48 22 6915 904
e-mail: kamiz@igf.edu.pl

Unit name: Institute of Geophysics, Polish Academy of Sciences, Department of Magnetism

Job title: Ph.D. student - scholar

Requirements:

1. Participant of the doctoral studies, working on the preparation of the doctoral dissertation in the field of mathematics, physics or engineering, preferably fluid dynamics.
2. Solid basis in the fields of mathematics and physics (candidates who graduated from physical and/or mathematical faculties are preferred).
3. Programming skills (e.g. C, FORTRAN, PYTHON etc.).
4. Experience in the fields of fluid dynamics and/or electrodynamics is greatly welcome.

Description of tasks:

The task of the student will be involve analysis of the so-called Magnetic Buoyancy Instability (MBI) and its relation to hydro-magnetic dynamo in the solar interior. The study will be concerned with a model of the solar tachocline – a region of large shear, where the Solar toroidal field is greatly amplified. The Ph.D. student will be required to do both, the theoretical and numerical analysis of the dynamical equations, that is the Navier-Stokes equation with the Lorentz force and the induction equation resulting from Maxwell’s and Ohm’s laws. The ultimate aim of the project is to establish the effective dynamical equations governing the magnetic field evolution in the Solar tachocline, based on the temporal and spatial scales introduced by the MBI.  The next step is to solve the derived set of equations via numerical methods, which would allow to model the time evolution of the Solar magnetic field.

Supervisor: Assoc. Prof. Krzysztof Mizerski

tel.: +48 22 6915 904
e-mail: kamiz@igf.edu.pl

Unit name: Institute of Geophysics, Polish Academy of Sciences, Department of Magnetism

Job title: Ph.D. student - scholar

Requirements:

1. Participant of the doctoral studies, working on the preparation of the doctoral dissertation, concerning the analysis of the so-called MAC waves (Magnetic-Achimedean-Coriolis) generated in the Earth’s outer core by the buoyancy, magnetic and inertial forces.
2. Solid basis in the fields of mathematics and physics (candidates who graduated from physical and/or mathematical faculties are preferred).
3. Experience in analysing data sets in the form of time series.
4. Programming skills (e.g. C, FORTRAN, PYTHON etc.).
5. Additional experience in the fields of fluid dynamics and/or electrodynamics is greatly welcome.

Description of tasks:

The task of the student will be concerned with the analysis of the so-called MAC waves (Magnetic-Achimedean-Coriolis) generated in the Earth’s outer core by the buoyancy, magnetic and inertial forces. The analysis will involve both, theoretical investigations of the Navier-Stokes equations and coupled Maxwell equations likewise numerical simulations of the dynamics of MAC waves, with application of a code written in C language of programming by the supervisor of the project, ready-for-use and tested. The interactions of MAC waves in the “Stratified Ocean” at the top of the liquid core are known to have a substantial effect on the dynamics of the geomagnetic field. The ultimate aim of the project is to establish the influence of the MAC waves on the geomagnetic dynamo and geomagnetic field oscillations.

A solid base in mathematics and physics and optionally adequate programming skills are expected from the candidate.

Supervisor: prof. Zbigniew Czechowski

prof. dr hab. Zbigniew Czechowski

tel. + 48 22 6915 683
email: zczech@igf.edu.pl

Requirements:

1. Master’s Degree in Mathematics, Physics, Geophysics, or equivalent science discipline. It is allowed to start the application for persons who will submit a commitment to receive the Master’s Degree before September, 30, 2019 with an opinion of the Master’s thesis supervisor indicating the current stage of thesis preparation.
2. Knowledge of the basics of probability theory and statistics.
3. Knowledge of the basics of differential and integral calculus.
4. Knowledge of  a programming language e.g., Fortran, Mathematica or other, and numerical methods. Experience in programming is welcomed.
5. Good command of speaking, reading and writing English.
6. Having research track record of publications, conference presentations, and participation in scientific projects will be welcomed candidate’s advantage.                 

The PhD tasks:

1. In the framework of the proposed subject, time series recorded in monitoring of geophysical phenomena will be examined using different modern statistical methods.
2. Modelling of the phenomena by the nonlinear Langevin equation. It must be appropriately modified to describe non-Markovian processes.
3. Developing the appropriate method of reconstruction of the modified Langevin equation based on time series data.
4. Testing of the procedure on synthetic data.
5. Application of the procedure to selected geophysical phenomena.
6. Meeting and workshop organizations, elaboration of the experiment results

7. Presentation of the results in conferences and scientific journals.

Abstract:

Many geophysical phenomena are generated by complex and interacting processes which are hidden and difficult or impossible for direct observation. In modelling of these phenomena statistical aspects must be taken into account. Therefore, the registered time series will be treated as  realizations of some stochastic processes.  Due to  complexity of interactions the processes  are non-Markovian. As a stochastic model which governs these processes the nonlinear Langevin equation will be applied. However, it must be appropriately modified to describe non-Markovian processes. The large portion of the thesis will be devoted to developing the appropriate method of reconstruction of the modified Langevin equation based on time series data. After testing on synthetic data, the procedure will be applied to selected geophysical time series measured in different time scales. The structure of the reconstructed equation will allow for separating averaged forces governing the phenomenon and the stochastic term generating fluctuations. A transition probability will also be found what allows for forecasting of the process under investigation.

Additional information:

1. The thesis supervisor will be Professor  Zbigniew Czechowski (Institute of Geophysics PAS).
2. In addition to the candidate’s application  submitted to Institute of Geophysics PAS it would be mandatory  to send CV and the motivation letter to the thesis supervisor: zczech@igf.edu.pl. 

Promotor: prof. Wojciech Dębski

prof. dr hab. Wojciech Dębski

tel. + 48 22 6915 964
email: debski@igf.edu.pl

Seismological research, no matter if concentrated on physics of earthquakes or the Earth structure is always based on seismic waves recorded at Earth surface or near it (deep mines) . In consequence seismological analysis always have a form of inverse problems. The thought quantities can never be measured directly their values, relations, etc. have to be inferred from existing seismic records.  For this reason it is extremal y important to develop modern numerical methods for an efficient processing seismic data. One of such technique is so called time reversal method. The goal of the proposed research is to apply this technique for inversion seismic moment tensor for mining induced  seismic data.

Candidates, should graduate in physics, r applied mathematics, informatics, or geology   and demonstrate at least passive knowledge of English.   Experience with programing in at least one of the programming language: C, Python, Matlab, R, Julia Bash, Tcsh is required.  Knowledge elementary numerical methods is wellcome.

Promotor: prof. Wojciech Dębski

prof. dr hab. Wojciech Dębski

tel. + 48 22 6915 964
email: debski@igf.edu.pl

In spite of an enormous progress  in study of earthquake source processes in recent couple of years our understanding of physical processes leading and occurring  in earthquake foci are still not satisfactory. There are many reasons of this situation among which nonlinearity of occurring processes and lack of scale separation are the most  important. Actually, this lack of scale separation between processes at micro-scales (tips of cracks, micro-cracking, to name a few) and final, large scale visible earthquake effects (ruptures of faults of  tens s to hundreds kilometers in length) is the largest problem on contemporary seismology of earthquake sources.  Within a proposed PhD work we propose an analysis of microscopic rupture processes and their relation to natural/induced seismic events using advance numerical simulations.  These simulations are planed to be based on the modern Discrete Element Method approach.

Candidates, should graduate in physics or mathematics  and demonstrate at least passive knowledge of English.  Experience with programing in at least one of the programming language: C, Python, Matlab, R, Julia Bash, Tcsh is required.

Supervisor: Assoc. Prof. Wojciech Czuba

dr hab. Wojciech Czuba

tel.:+48 (22) 6915-782
e-mail: wojt@igf.edu.pl

A PhD student will work on seismic active data collected from several projects performed in the Svalbard region to prepare seismic 3-D model using at least ray-tracing trial-and-error method as a base.
  There are also available geographically limited passive seismic data to interpret using different methods (tomography and others) for regional or local seismic structure around the northern part of Mid-Atlantic Oceanic Ridge (Knipovich Ridge).


Requirements:

- completed master's degree in geophysics, physics, geology with the major in geophysics or related
- good evaluation of the study course
- good knowledge of English in speech and writing
- work in unix/linux and MS Windows operating systems
- ability to organize work independently
- at least the basics of programming

Additional advantages:

- knowledge of Fortran or C++ programming language
- practical knowledge of seismic data processing systems (eg. Seismic Unix, PROMAX)
- knowledge of other foreign languages (especially Polish and Russian) 

Supervisor: Assoc. Prof. Grzegorz Lizurek

DR HAB. GRZEGORZ LIZUREK
e-mail: lizurek@igf.edu.pl

NON-DC COMPONENTS OF FULL MOMENT TENSOR SOLUTION AS AN ARTIFACT OF P AND S WAVE AMPLITUDE INVERSION. DETERMINING THE LIMITATION OF THE METHODOLOGY AND ATTEMPT OF METHOD DEVELOPMENT TOWARDS USING S WAVE AMPLITUDE,  EXTENDED SOURCE AND NEAR- AND INTERMEDIATE FIELD EQUATIONS.

• Preparing the algorithm and scripts to generate synthetic amplitudes and radiation pattern originated by the non-shearing seismic sources;
• Synthetic tests of focal sphere coverage influence on moment tensor inversion results for typical anthropogenic seismicity cases with assumption of isotropic component of the moment tensor up to: 100%, 80%, 60%, 40%, 20%;
• Synthetic tests of focal sphere coverage influence on moment tensor inversion results for typical anthropogenic seismicity cases with assumption of CLVD component of the moment tensor up to: 100%, 80%, 60%, 40%, 20%;
• Synthetic tests of focal sphere coverage influence on moment tensor inversion results for typical anthropogenic seismicity cases with assumption of isotropic and CLVD components of the moment tensor up of:  80% vs 20%, 60% vs 40%, 40% vs 60%, 20% vs 80%, respectively;
• Synthetic tests of focal sphere coverage influence on moment tensor inversion results for typical anthropogenic seismicity cases with assumption of the following isotropic, CLVD and DC components ratio in the moment tensor solution:  60%/20%/20%, 40%/40%/20%, 20%/40%/40% etc.;
• Development of SV and SH amplitude moment tensor inversion as an extension of P amplitude method;
• Synthetic tests of focal sphere coverage influence on moment tensor inversion results, similar to P wave amplitude inversion;
• Development of the moment tensor inversion with use of intermediate field displacement equations;
• Development of the moment tensor inversion with use of near field displacement equations;
• Development of the moment tensor inversion with use of extended source assumption and different rupture scenario;
• Application of the methodology for focal mechanism solutions of anthropogenic, tectonic, volcanic and glacial seismic events

Supervisor: Assoc. Prof. Grzegorz Lizurek

DR HAB. GRZEGORZ LIZUREK

e-mail: lizurek@igf.edu.pl
tel: +48 (22) 691 57 77

LOOKING FOR CHARACTERISTIC FOOTPRINTS IN SEISMIC PROCESS EVOLUTION AS THE TOOL IN DISCRIMINATION BETWEEN TECTONIC AND RESERVOIR TRIGGERED SEISMICITY.  MODELLING OF THE INFLUENCE OF MAN-INDUCED STRESS CHANGES  IN RELATION TO TECTONIC STRESS ORIENTATION AND SPATIO-TEMPORAL CLUSTERING OF SEISMICITY. 

Research tasks:

• Modelling of the influence of man-induced  pore-pressure on stress axes orientation
• Modelling of the influence of man-induced  water mass load changes on stress axes orientation
• Modelling of the influence of ground water level depletion  on stress axes orientation
• Modelling of the diffusion and permeability influence on the  spatio-temporal distribution of seismicity
• Modelling of the influence of above mentioned factors on spatio-temporal distribution of seismicity
• Application of the developed models into case studies: reservoir impoundment data from IS-EPOS platform (at least three cases Monteynard, Song Tranh and Czorsztyn)

Requirements:

Master degree in geophysics or geology or physics.

Language: English writing and speaking necessary at scientific communication level.

Programming: Matlab (Octave) and/or Python ObsPy at least 

tel. + 48 22 6915 685
email: psenat@igf.edu.pl

Requirements:

Programming and numerical methods skills.

Finished studies in physics or/and mathematics  (possibly geophysics or/and seismology)

A passion for theoretical researches.

Fluent English.

Sources of funding:

Researches carried out within statutory activities of the Theoretical Geophysics Department, PAS. Applications for grants during doctoral studies.

tel. + 48 22 6915 869
email: alek@igf.edu.pl

The proposed research is on the dynamics of global atmospheric circulation with particular interest in tropics. PhD student will be using and developing mathematical models, which describe evolution of discrete solutions (waves) of Naviere – Stokes equations in the shallow water approximation as well as interactions between them. Other mathermatical models, including weak temperature gradient approximation, will also be used. The PhD student will be designing and running idealized numerical simulation using Open IFS model from European Center for Medium-Range Weather Forecasts. In order to validate theoretical results, the candidate will be also analyzing data from satellite measurements, ground based observations and numerical models (reanalysis).

Research will be conducted in the Atmospheric Physics Department of the IGF PAS in collaboration with Department of Magnetism. Dr hab. Krzysztof Mizerski, prof. PAS will serve as a mentor to the PhD stundent, the research will be performed in collaboration with Dr Dariusz Baranowski. This research will be conducted in international collaboration (e.g. Scripps Institution of Oceanography, University of California San Diego, US Naval Research Laboratory, University of East Anglia) embedded in an international programme Years of the Maritime Continent.

Proposal for project funding of a PhD position will be submitted in 2019 in an answer to a call from NCN.

Requirements:

• MSc diploma in physics, mathematic or informatics
• Knowledge of differential equations solutions techniques
• Knowledge of the basics of geophysical fluid dynamics or dynamics of the atmospheric and oceanic circulation
• Knowledge of scripting programming (Python, Matlab, IDL, NCL, R)
• English reading/writing/speaking at least at the level enabling understanding of scientific publications and interactions with international collaborators
• Experience with handling of atmospheric and/or oceanographic data would be an advantage