PhD Opportunity: Ionospheric Current Systems

Applications are invited for a four-year, full-time doctoral student position. The successful candidate will study of space weather effects on the high-latitude ionospheric current systems and magnetosphere-ionosphere coupling. The project will utilise data from the Swarm satellites and ground-based magnetometers (e.g. SuperMAG and IMAGE), together with other satellite and ground-based measurements.

The position will be placed in the Ionospheric Physics research unit at the Faculty of Science, University of Oulu. In the unit the coupled magnetosphere-ionosphere-thermosphere system is studied by utilising data from different satellite missions (e.g. Swarm and Cluster) and from versatile ground-based instruments, including the EISCAT incoherent scatter radars. We are looking for candidates with MSc degree in Physics, Space Physics, Computational Physics or a closely related field. Experience in programming and earlier studies in Space Physics are an advantage.

To apply, please see the full job description and use the electronic application form.

Deadline: 15th September 2018, (24:00 h Finnish local summer time).

Further information can be obtained from Dr Heikki Vanhamäki (heikki.vanhamaki(at)oulu.fi) or Prof. Anita Aikio (anita.aikio(at)oulu.fi).

Image: Swarm satellite constellation. ©2013 by ESA/ATG Medialab.

PhD Opportunity: Ionospheric Physics

Applications are invited for a four-year, full-time doctoral student position. The successful candidate will develop data analysis tools for the EISCAT and EISCAT_3D ionospheric radars and will use them for studies of space weather effects on the high-latitude ionosphere. The project will utilise Bayesian techniques in radar data analysis.

The position will be placed in the Ionospheric Physics research unit at the Faculty of Science, University of Oulu, where the coupled magnetosphere-ionosphere-thermosphere system is studied by utilising data from different satellite missions (e.g. Swarm and Cluster) and from versatile ground-based instruments. The EISCAT incoherent scatter radars have a central role in the unit’s research.  Capabilities of the present EISCAT radars will be surpassed by the high-resolution, volumetric observations of the EISCAT_3D radar system by 2022. 

We are looking for candidates with MSc degree in Physics, Space Physics, Computational Physics or a closely related field. Experience in programming and earlier studies in Space Physics are an advantage.

To apply, please see the full job description and use the electronic application. 

Further information can be obtained from: Dr Ilkka Virtanen (ilkka.i.virtanen at oulu.fi) or Prof. Anita Aikio (anita.aikio at oulu.fi).

Application deadline is 30 May 2018 (24:00 Finnish local time).

Photo: Aerial view of Linnanmaa Campus; copyright University of Oulu, all rights reserved.

PhD Opportunity: Middle-Atmosphere Physics and Chemistry

Mesospheric Ozone Receiver Antenna. 

The University of Oulu in Northern Finland, with approximately 16,000 students and 3,000 employees, is an international, multidisciplinary research university with a rich pool of creative and intellectual talent. The strengths of the University include broad, multidisciplinary research interests, a modern research and study environment, and wide cooperation with international research and educational institutes.

The Sodankylä Geophysical Observatory (SGO) is a separate institute of the University of Oulu. Established in 1914, SGO carries out continuous, long-term geophysical measurements of Earth’s high-latitude environment. This activity is a National Task and includes measurements of Earth’s geomagnetic field, ionosphere, northern lights, cosmic radiation and seismic activity. SGO employs about 30 staff, two thirds of which have an academic degree. SGO scientists routinely collaborate with more than 100 institutes world-wide.

The PhD student position is part of the project "Mesospheric Monitoring of Ozone above the Polar Vortex (MeMO)”, which is a spearhead project funded by the university’s Kvantum Institute within the thematic focus area "Earth and near-space system and environmental change."

The PhD project investigates the response in mesospheric and stratospheric ozone and related chemistry as consequence of exceptional space weather events such as solar proton events. The study will be conducted using e.g. the Whole Atmosphere Community Climate Model (WACCM) and satellite-based observations, as well as a wealth of atmospheric measurements located at the Sodankylä Space Campus of the University of Oulu and the Finnish Meteorological Institute. Ground-based measurements include, among others, a lidar, a microwave radiometer, a high-resolution Fourier Transform Spectrometer, UV and UV-visible spectrophotometers, balloon-borne and UAV borne instrumentation.

The successful candidate will have a M.Sc. degree in physics, space physics, atmospheric physics or chemistry, meteorology or atmospheric geophysics. Experience in the use of instrumentation and/or atmospheric computer models is highly beneficial, as is experience in data analysis using a high-level programming language (e.g. Python, Matlab). Excellent command of both spoken and written English is essential.

The PhD student position is for 4 years from 1st May 2018 (unless agreed otherwise).  The salary will be based on the levels 2-4 of the demand level chart for university-level teaching and research staff of Finnish universities. In addition, a salary component based on personal work performance will be paid (maximum of 46.3 % of the job-specific component). The salary is thus in practice roughly 2300€ – 3000€ per month, depending on the appointee’s qualifications and experience.

Apply online latest on 16th April 2018 (click on "Apply for the job" at the bottom of that page). The application must be submitted using the electronic application form together with a motivation letter (max 1 page) and full CV. A trial period of 6 months is applied in the position.

Contact: Dr Thomas Ulich, e-mail: thomas.ulich(at)sgo.fi, tel.: +358405490403.

PhD Opportunity: Energetic Particle Precipitation on the Middle Atmosphere

Photo: Timo Rantala, SGO.

PhD Student Opportunity: “Effects of Energetic Particle Precipitation on the Middle Atmosphere”

The University of Oulu in Northern Finland, with approximately 16,000 students and 3,000 employees, is an international, multidisciplinary research university with a rich pool of creative and intellectual talent. The strengths of the University include broad, multidisciplinary research interests, a modern research and study environment, and wide cooperation with international research and educational institutes.

The Sodankylä Geophysical Observatory (SGO) is a separate institute of the University of Oulu. Established in 1914, SGO carries out continuous, long-term geophysical measurements of Earth’s high-latitude environment. This activity is a National Task and includes measurements of Earth’s geomagnetic field, ionosphere, northern lights, cosmic radiation and seismic activity. SGO employs about 30 staff, two thirds of which have an academic degree. SGO scientists routinely collaborate with more than 100 institutes world-wide.

The PhD position is part of the project "Mesospheric Monitoring of Ozone above the Polar Vortex" (MeMO), which is a spearhead project funded by the university’s Kvantum Institute within the thematic focus area "Earth and near-space system and environmental change."

There is growing evidence that the energetic particle precipitation (EPP) originating from the Sun can significantly modulate the middle-atmospheric dynamics, and possibly alter the global atmospheric circulation via ionic production of minor species (such as odd hydrogen and odd nitrogen), thus causing subsequent ozone loss in the stratosphere.

The PhD project investigates both the EPP and the photoionisation taking place in the mesosphere-lower thermosphere (MLT) altitudes (mainly 60-100 km). For the EPP, the altitude of the maximum ionisation is a direct measure of precipitation energy. This energy-height dependence makes it possible to invert the EPP flux density spectrum from any height-dependent electron density measurement.

The project deploys a comprehensive set of ground-based (and rocket) electron density data obtained by various radio methods incl. incoherent scatter radars (EISCAT, www.eiscat.se) and KAIRA (www.sgo.fi/KAIRA) as well as the detailed ion-neutral chemistry model (SIC).

The successful candidate will have a M.Sc. degree in physics, space physics, atmospheric physics or geophysics. Experience in data analysis using a high-level programming language (e.g. Python, Matlab) is highly beneficial. Excellent command of both spoken and written English is essential.

The PhD position is for 4 years from 1st May 2018 (unless agreed otherwise).  The salary will be based on the levels 2-4 of the demand level chart for university-level teaching and research staff of Finnish universities. In addition, a salary component based on personal work performance will be paid (maximum of 46.3 % of the job-specific component). The salary is thus in practice roughly 2300€ – 3000€ per month, depending on the appointee’s qualifications and experience.

Please, find the original job announcement here and fill in the application form at the end of it "Apply for the job". Deadline: 16th March 2018.

Contact: Dr Thomas Ulich, e-mail: thomas.ulich(at)sgo.fi, tel.: +358405490403.

PhD Defence: Studies of Ionospheres of Earth and Mars

Huge congratulations to our colleague and friend Dr Maxime Grandin, who successfully defended his PhD thesis at SGO yesterday. His work entitled "Multi-Instrument and Modelling Studies of the Ionospheres of Earth and Mars" was done at Sodankylä Geophysical Observatory, University of Oulu and at the Research Institute in Astrophysics and Planetology (IRAP), University Paul Sabatier, Toulouse leading to a double PhD degree in physics.

The opponents were Dr Mervin Freeman, British Antarctic Survey, Cambridge, UK, and Dr Ronan Modolo, LATMOS, University of Versailles, France. Prof Anita Aikio, University of Oulu, served as custos.

Väitöstilaisuus: Avaruussää vaikuttaa Maan ilmakehään myös Auringon aktiivisuuden ollessa alhainen

Maxime Grandin, M.Sc., väittelee aiheesta "Avaruussää vaikuttaa Maan ilmakehään myös Auringon aktiivisuuden ollessa alhainen" 26.10.2016.

Avaruussää vaikuttaa Maan yläilmakehään ja ionosfääriin. Ionosfääri on ilmakehän sähköä johtava osa, joka koostuu elektroneista ja ioneista korkeusalueella 60–1000 kilometriä. Korkeiden leveyspiirien ionosfääri on hyvin herkkä avaruussään vaihteluille. Vaikutuksia voivat olla esimerkiksi muutokset ilmakehän kemiassa tai hiukkassade avaruudesta ilmakehään, mikä synnyttää muun muassa revontulia.

Avaruussää liittyy hiukkasiin, jotka tulevat Auringosta. Tätä hiukkasvirtaa kutsutaan aurinkotuuleksi. Auringon aktiivisuus vaihtelee noin 11 vuoden jaksoissa. Jakson maksimin jälkeen aktiivisuus laskee, mutta avaruussää vaikuttaa siitä huolimatta edelleen revontulialueen ionosfääriin. Se johtuu siitä, että aurinkotuulen nopeus on tällöin usein suuri, jopa 800–1000 kilometriä sekunnissa. Tässä väitöskirjassa on tutkittu kolmen vuoden ajalta, miten nämä aurinkotuulen suurinopeuksiset virtaukset vaikuttavat ionosfääriin. Aineistoina on käytetty Sodankylän geofysiikan observatorion eri laitteilla tehtyjä mittauksia ja satelliittimittauksia. Aineiston käsittely on tehty käyttäen tilastollisia menetelmiä.

Osa väitöskirjasta käsittelee myös Marsin kaasukehän ja ionosfäärin tutkimista. Marsin kaasukehää on tutkittu vuodesta 2004 lähtien Mars Express -luotaimella. Mars Expressin ja Maan välillä kulkevien radioaaltojen taajuus mitataan hyvin tarkasti, mikä mahdollistaa Marsin kaasukehän ja ionosfäärin lämpötilojen ja koostumuksen arvioimisen. Väitöskirjassa on esitetty kehittämämme uusi aineiston käsittelymalli, joka perustuu Marsin kaasukehän ja ionosfäärin läpi kulkevien radioaaltojen numeeriseen simulaatioon.

Väitöskirja on tehty Oulun yliopiston Sodankylän geofysiikan observatoriossa ja Toulousen yliopiston IRAP-instituutissa (Institut de Recherche en Astrophysique et Planétologie).

Väitöstilaisuus

26.10.2017, klo  12:00, Polarian luentosali, Sodankylän geofysiikan observatorio, Tähteläntie 62, Sodankylä

Aihe

Maapallon ja Marsin ionosfäärien tutkimuksia eri mittalaitteilla ja mallintamisella
Multi-instrument and modelling studies of the ionospheres at Earth and Mars

Vastaväittäjät

Dr. Mervyn Freeman, British Antarctic Survey, Cambridge, Iso-Britannia
Dr. Ronan Modolo, LATMOS, Guyancourt, Ranska

Kustos

Professori Anita Aikio, Oulun yliopisto

PhD Candidate in Radio Science and Ionospheric Physics

PhD Candidate in Radio Science and Ionospheric Physics at UiT The Arctic University of Norway

University of Tromsø - The Arctic University of Norway, Faculty of Science and Technology, has a PhD student position vacant for applicants who wish to obtain the degree of Philosophiae Doctor (PhD). The appointment is for a period of four years.

The successful candidate will participate in the development and use of novel high power large aperture radar observational techniques in combination with other relevant instruments, with the goal of advancing the state of knowledge of ionospheric phenomena. Examples of potential topics of research include: ionospheric modification, characterisation of auroral energetic particle precipitation, and magnetosphere-ionosphere coupling. The final scope of the thesis project will be determined based on the background and interests of the candidate.

The position is attached to the Space Physics group at the Department of Physics and Technology, which is located on the Tromsø campus of UiT. The Space Physics group has a long tradition in using the radar instruments of the EISCAT Scientific Association in Northern Scandinavia and plays an important role in preparing for the new advanced atmospheric radar facility EISCAT_3D. Scientists in the group also conduct research on topics including: auroral ionosphere, ionospheric modification, space weather, laboratory plasmas, space debris, planetary radar, dusty plasma in the mesosphere, and long-term trends in the ionosphere. The Space Physics group consists of eight faculty members and six PhD students. The group will be expanded by four PhD students and one postdoctoral scientist during the next year.

Further information about the position and project details is available by contacting:

Associate Professor Juha Vierinen, email juha-pekka.vierinen -at- uit.no or tel. +47 981 72 827.

Please read also the full announcement of this vacancy.

Photo: Thomas Ulich.

PhD Thesis: Proxies for long-term cosmic ray variability

Today, M.Sc. Stepan Poluianov defends his doctoral thesis "Proxies for long-term cosmic ray variability" at 12:00 at the main Linnanmaa campus of the University of Oulu. Stepan Poluianov has used Oulu Neutron Monitor data of SGO under the supervision of Prof. Ilya Usoskin of SGO, who also serves as the Kustos (i.e. Chairman) of the defence ceremony. 

Congratulations from all of us at SGO!

PhD Defence in One Minute

We have made a time-lapse video of Dr Lassi Roininen's PhD defence on 16th June, 2015. The actual event was slightly longer than the video linked here, which compresses proceedings into one minute. Then we've attached a time-lapse of the subsequent coffee as well. Thus if you weren't in Sodankylä to witness the event live, you can now catch up in a minute and a half in total. Enjoy!

And with this video, we wish all of you a very nice Midsummer Weekend!

Time-lapse: Thomas Ulich.