Open Positions

1 x 65% PhD position (f/m/d)

The Institute of Environmental Physics (IUP) at the University of Bremen offers  – under the condition of job release – at the earliest possible date a

3-year PhD position (f/m/d)
German federal pay scale E13 TV-L (65 %)

in the research area

Remote sensing of aerosol properties and surface reflectance in the Arctic from satellite observations – Changes and Analysis

The time limitation is subject to the scientific qualification according to the Act of Academic Fixed-Term Contract, §2 (1) (WissZeitVG – Wissenschaftszeitvertragsgesetz). Therefore, candidates may only be considered if they dispose of the respective scope of qualification periods according to §2 (1) WissZeitVG.

The position is framed within the overarching Collaborative Research Center TR172 „ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)³”, funded by the German Science Foundation (DFG). After a very successful first phase, (AC)³ is moving forward to its second phase, starting January 1st, 2020. The project pursuits an improved understanding of the processes leading to the recent warming of the Arctic high-latitudes, synergistically exploiting a variety of modeling and observational approaches. Therefore, close collaboration is planned with national partners (Universities of Leipzig and Cologne, Alfred Wegener Institute – AWI – for Polar and Marine Research in Bremerhaven/Potsdam and Center for Tropospheric Research – TROPOS – in Leipzig).

The work addresses the need to establish and investigate changes of aerosol properties and Surface Spectral Reflectance (SSR) in the solar spectral region, their origins and impact on Arctic Amplification. To achieve this goal, the temporal changes in aerosol loading and type and SSR between 60◦ N and 90◦ N are to be investigated over the past 2–3 decades using data from a series of nadir sounding satellite spectrometers. The research focuses on the determination of the SSR and aerosol optical properties for cloud free scenes. Aerosol retrieval algorithms developed at IUP/University Bremen shall be optimized and adapted for selected data sets. These deliver Aerosol Optical Thickness (AOT), and aerosol type, SSR and other relevant parameters.  Equally important is the determination of the SSR. Having established the time series of data products, comprising consistent and consolidated aerosol optical properties and SSR for 60°N to 90°N, these data will be analysed and the role of changing aerosol optical parameters and surface type and reflectance in the Arctic Amplification and any feedback will be investigated.
During the first half, the doctoral student will work closely with the Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC). The focus of the expedition is related to the (AC)³ project and requires about one year of satellite data analysis of clouds, surface and aerosol parameters, which the candidate has to create, select, prepare and deliver with the team. Data will be evaluated or visualized along the drift route of the ship and on larger scales. Conversely, the ship measurements will also help to validate the satellite data evaluations.

Prerequisites

  • The successful candidate holds a Master-of-Science-equivalent degree in one of the following disciplines: physics, geophysics, meteorology, mathematics or computer science. Grade point average must be better than B (English grade) or 2.0 (German grade).
  • He/she possesses experience in the Unix/Linux environment workflow, programming skills in at least one high-level language and
  • strong interest in atmospheric science with focus on light scattering, radiative transfer, remote sensing methods and observations, climate.
  • He/she brings along also a creative and independent mind set, together with
  • excellent communication and presentation skills, both in written and spoken English.

The position is embedded in the working group Cloud, Aerosol and Surface Parameter Retrieval  lead by Dr. Marco Vountas; further information can be found here: www.iup.uni-bremen.de/aerosol. The group is part of the Institute of Environmental Physics and Remote Sensing IUP/IFE – in the department of Professor John P. Burrows which is offering a good working atmosphere and equipment. Further information about the institute can be found here: www.iup.uni-bremen.de.

As the University of Bremen intends to increase the proportion of female employees in science, women are particularly encouraged to apply. In case of equal personal aptitudes and qualification priority will be given to disabled persons.

Contact:

For more information. please contact Dr. Marco Vountas (vountas[at]iup.physik.uni-bremen.de).

Please send your application documents, including a cover letter stating the research interest, a curriculum vitae with research and technical background as they relate to the position, a list of publications (if applicable), transcripts and contact information of, at least, two referees until February 26, 2020 by indicating the job id A13/20 to:

Institut für Umweltphysik
Universität Bremen FB1
Marco Vountas
Otto-Hahn-Allee 1
D-28359 Bremen

or (as a single PDF file) by e-mail: vountasiup.physik.uni-bremen.de

For applicants wishing to send your applicants by surface mail, please send us your application on plain paper (no folders) and do not send us original certificates as we are not able to return your applications.

1 x 65% PhD position (f/m/d)

The Institute of Environmental Physics (IUP) at the University of Bremen offers  – under the condition of job release – at the earliest possible date a

3-year PhD position (f/m/d)
German federal pay scale E13 TV-L (65 %)

in the research area

Analysis of  top-of-atmosphere radiation over the Arctic as well as to retrieve and analyse cloud properties for historical and current satellite data.

The time limitation is subject to the scientific qualification according to the Act of Academic Fixed-Term Contract, §2 (1) (WissZeitVG – Wissenschaftszeitvertrags-gesetz). Therefore, candidates may only be considered if they dispose of the respective scope of qualification periods according to §2 (1) WissZeitVG.

The post is embedded into the second phase of the Collaborative Research Center (Transregio TR172) “Arctic Amplification: Climate Relevant Atmospheric and Surfacean Processes and Feedback Mechanisms (AC)³“, funded by the German Research Foundation starting January 1st, 2020. The overall project aims to improve the understanding of the processes that cause the onset of Arctic warming. One core aspect is to use modeling and observation approaches in a synergetic way. Therefore, close cooperation with national partners (Universities of Leipzig and Cologne, Alfred Wegener Institute for Polar and Marine Research and TROPOS, Leibniz Institute for Tropospheric Research) is envisaged.

One of the scientific objectives of the task is to study changes in reflectivity in the Arctic region and beyond (60°N-90°N) by spectral observations from UV to thermal infrared using various satellite-based instruments (e.g., GOME2, SCIAMACHY, Sentinel-5p, IASI). After that, an assessment of the changes in the cloud properties is to be carried out. Especially clouds over snow and ice play a very important role. Data sets from the first phase of (AC)³ as well as new developments are to be promoted in this area: in the area of cloud retrievals during polar night as well as the temporal extension of the existing datasets. Time series analyses that allow the determination of changes / trends shall be assessed with dedicated climate modeling.

During the first half, the doctoral student will work closely with the Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC). The focus of the expedition is related to the (AC)³ project and requires about one year of satellite data analysis of clouds, surface and aerosol parameters, which the candidate has to create, select, prepare and deliver with the team. Data will be evaluated or visualized along the drift route of the ship and on larger scales. Conversely, the ship measurements will also help to validate the satellite data evaluations.

Prerequisites:

  • Required is a scientific degree (diploma or master of science in physics, geophysics, environmental physics, meteorology, mathematics or computer science). The overall average grade should be better than 2.0 (according to German grading system) or better than B (English grade)
  • The candidate should have good to very good experience in Unix / Linux working environments and very good programming skills in at least one high level language
  • Already existing knowledge in dealing with satellite data is expected
  • Candidates should have a strong interest in atmospheric science with a focus on light scattering, radiation transfer, remote sensing / observation and climate
  • Candidates should bring a creative and independent research mentality
  • Excellent communication and presentation skills in written and spoken English

The activities are performed in the Cloud, Aerosol and Surface Parameter Retrieval – group led by Dr. Marco Vountas – within the Department of Professor John P. Burrows at the IUP / IFE (University of Bremen). The group and institute provide a very good working atmosphere and facilities in an international working environment. Further general information can be found here: www.iup.uni-bremen.de. Information about the specific working group can be found here: www.iup.uni-bremen.de/aerosol.

As the University of Bremen intends to increase the proportion of female employees in science, women are particularly encouraged to apply. In case of equal personal aptitudes and qualification priority will be given to disabled persons.

Contact:

For more information. please contact Dr. Marco Vountas (vountas[at]iup.physik.uni-bremen.de).

Please send your application documents, including a cover letter stating the research interest, a curriculum vitae with research and technical background as they relate to the position, a list of publications (if applicable), transcripts and contact information of, at least, two referees until February 26, 2020 by indicating the job id A12/20 to:

Institut für Umweltphysik
Universität Bremen FB1
Marco Vountas
Otto-Hahn-Allee 1
D-28359 Bremen

or (as a single PDF file) by e-mail: vountasiup.physik.uni-bremen.de

For applicants wishing to send your applicants by surface mail, please send us your application on plain paper (no folders) and do not send us original certificates as we are not able to return your applications.

Phd student physical oceanography (m/f/d)

Background
The tasks of the PhD project are embedded within the German Science Foundation Collaborative Research Center “Arctic Amplification” project C03-AWI which is a collaboration with the Institute of Environmental Physics at the University Bremen. The PhD project will be done within the Phytooptics Group of the section Physical Oceanography of the Polar Seas. It shall be investigated how the change of surface water components, such as coloured dissolved organic matter (CDOM) and phytoplankton respond and feedback to the Arctic Amplification.

Tasks
Coupled ice-ocean-biogeochemical modelling shall be used to assess the radiative feedback of changes in the distribution of phytoplankton and colored dissolved organic matter during Arctic Amplification. Specifically, the variability and change of these two compounds and their role in the formation of aerosol precursor substances shall be investigated for the last 30 years within the Arctic Ocean. The model adjustments will be based on incorporating knowledge gained from the combination of field and satellite data. Model runs shall be analyzed in order to quantify the impact of indirect effects of changing surface water biogeochemistry on atmospheric radiative forcing via aerosol precursor emissions. The work also involves strong collaboration with other projects (B4, D2) from the collaborative research center “Arctic Amplification”.

Requirements

  • M.Sc. degree or equivalent in physics, oceanography, environmental physics or meteorology with a grade point average better than B (English grade) or 2.0 (German grade),
  • good programming skills in at least one high level programming language and experience with big data analysis,
  • team skills in a multidisciplinary environment,
  • good command of English in writing and speaking (level B2)

Desirable skills and experience

  • knowledge within the following fields: physical and biological oceanography, marine optics, numerical modelling

As Ph.D. student at AWI you will be member of the Helmholtz Graduate School for Polar and Marine Research ‘POLMAR’ (http://polmar.awi.de) or another graduate school.

This characterizes us

  • our scientific success – excellent research.
  • collaboration and cooperation – intra-institute, national and international, interdisciplinary.
  • opportunities to develop – on the job, aiming at other positions and beyond AWI.
  • a culture of reconciling work and family – audited, and even more than that.
  • our outstanding research infrastructure – ships, stations, aircraft, laboratories and more.
  • an international environment – everyday contacts with people from all over the world.
  • having an influence – fundamental research with social and political relevance
  • flat hierarchies – freedom and responsibility.
  • exciting topics – also in technology, administration and infrastructure.

Further Information

For further information please contact Prof. Dr. Astrid Bracher (astrid.bracher@awi.de, +49(471) 4831-1128).

The position is limited to 3 years. The salary will be paid in accordance with the German Tarifvertrag des öffentlichen Dienstes (TVöD Bund), up to salary level 13 (66%).
The place of employment will be Bremerhaven.

Equal opportunities are an integral part of our personnel policy and we encourage women to apply.

Disabled applicants will be given preference when equal qualifications are present. The AWI fosters the compatibility of work and family through various means. Because of our engagement in the area of work-life compatibility we have been awarded the certificate “Career and Family”.
 
We look forward to your application!
Please forward your application with cv, letter of motivation explaining why you want to join one of our research areas, two letters of recommendation and a list of publications by February 28th, 2020 exclusively online.
Reference number: 20/10/D/Kli-b

1 x 65% PhD position (f/m/d)

The Institute of Environmental Physics and Remote Sensing at the University of Bremen is offering – under the condition of job release – at the earliest possible date a

3-year PhD position (f/m/d)
German federal pay scale E13 TV-L (65 %)

in the research area

Satellite observations and simulations of tropospheric halogens in a warming Arctic

The time limitation is subject to the scientific qualification according to the Act of Academic Fixed-Term Contract, §2 (1) (WissZeitVG – Wissenschaftszeitvertragsgesetz). Therefore, candidates may only be considered if they dispose of the respective scope of qualification periods according to §2 (1) WissZeitVG.

The department “Physics and Chemistry of the Atmosphere” of the Institute of Environmental Physics (IUP) of the University of Bremen is among the leading scientific institutions in the area of satellite remote sensing of atmospheric trace gases relevant for climate, air pollution and ozone chemistry. IUP is involved in the DFG (Deutsche Forschungsgemeinschaft) funded Transregio on Artic Amplifications (AC)³, which investigates the impact of climate change in the Arctic.

The research of the PhD will focus on the role of tropospheric halogens in the warming Arctic. Once released into the lower atmosphere, a process influenced by local weather conditions, halogen compounds deplete ozone. As such, halogens indirectly impact on the radiative properties of the atmosphere and in turn temperature of the Arctic. The PhD will work on the extension, improvement and analysis of long-term halogen satellite data using new higher resolution UV-vis sensors such as Sentinel-5P (3.5×5.5 km2 footprint). The relationship between halogen plumes and sources and drivers at different spatial scales such as young sea ice, leads, meltponds, meso- to synoptic scale weather systems, which are expected to change in a warming climate, will be investigated in collaboration with other (AC)³ partners. Synergistic case studies will involve Lagrangian transport modelling.

Requirements:

  • A master degree (or equivalent) in physics, meteorology or a related discipline with an average grade better than B (English grade) or 2.0 (German grade)
  • Good knowledge and experience in at least one of the following fields: physics and chemistry of the atmosphere, meteorology, remote sensing of the Earth system, numerical modelling (experience with FLEXPART, ICON, or WRF is regarded as an asset)
  • Very good knowledge of at least one higher programming language
  • Strong interest in data analysis and atmospheric research
  • Good knowledge in spoken and written English and / or German
  • Good communication skills, cooperation with national and international partners is required

The Institute of Environmental Physics offers a stimulating and friendly working atmosphere and excellent working environment. The position is integrated into the national scientific framework of (AC)³ and will be based at the IUP in Bremen. More information on the institute and the DOAS group can be found at www.iup.physik.uni-bremen.de/eng/ and www.doas-bremen.de.

As the University of Bremen intends to increase the proportion of female employees in science, women are particularly encouraged to apply. Applicants with a migratory background are highly welcome. Disabled candidates will receive preferred consideration over mainly equally qualified contenders.

For more information please contact Dr. Anne-Marlene Blechschmidt +49 (0)421 218 62780 (annebl[at]iup.physik.uni-bremen.de)

Please send applications including standard documentation (CV, copies of diplomas, letter of motivation) with reference to job advertisement number A14/20 until 26 February 2020 to

Universität Bremen
Institut für Umweltphysik
Dr. Anne-Marlene Blechschmidt
Otto-Hahn-Allee 1
D-28359 Bremen

or (as a single PDF file) by e-mail: annebl[at]iup.physik.uni-bremen.de

For applicants wishing to send your applicants by surface mail, please send us your application on plain paper (no folders) and do not send us original certificates as we are not able to return your applications.

The Leipzig Institute for Meteorology (LIM), Germany, invites applications for

PhD Position

Forecast of Warm Air Intrusions and Cold Air Outbreaks using ECMWF

The position is funded within the Transregional Collaborative Research Center TR172 on “ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)³” (www.ac3-tr.de) by the German Research Foundation  (DFG, Deutsche Forschungsgemeinschaft). Within the TR172, LIM together with the collaboration partners (Universities of Cologne and Bremen, TROPOS and Alfred Wegener Institute) aim to better observe, understand, and simulate processes leading to the current drastic climate changes in the Arctic.

Terms of employment

The PhD position (65% TV-L E13) is awarded for 3 years with possible extension to up to four years. The position is open starting from January 2020. We offer a productive and interdisciplinary working group including comprehensive supervision and integration into the thriving Leipzig Graduate School on Clouds, Aerosol and Radiation (http://www.lgs-car.tropos.de/).

Details are given in the following pdf document.

Qualification requirements

For the PhD position we expect strong interest in atmospheric science, in particular in cloud physics, remote sensing, radiative transfer, and climate. Applicants should have a Master in Meteorology or a related field. Experience in high-level scientific programming for data analysis is desirable. Candidates must possess excellent communication skills in written and spoken English.

Applications

Interested candidates should send a cover letter describing background; a CV, training and research interests; certificates; and the contact information of two referees as a single PDF to

m.brueckner@uni-leipzig.de” target=”_blank”>m.brueckner[at]uni-leipzig.de.

Applications will be accepted until the end of January 2020. Review of applications will begin immediately after and continue until the position has been filled.

Selection

The selection for the position will be based solely on scientific merit without regard to gender, religion, national origin, political affiliation, marital or family status or other differences. Among equally qualified candidates, handicapped candidates will be given preference.

The Leipzig Institute for Meteorology (LIM), Germany, invites applications for

Two PhD Positions

  1. Spatial and seasonal variability of cloud radiative forcing
  2. Moist static energy transport variability

 and

Two Postdoc Positions

  1. Characterization of Arctic mixed–phase clouds by airborne in–situ remote sensing
  2. Remote sensing of Arctic clouds and sea ice

The positions are funded within the Transregional Collaborative Research Center TR172 on “ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)³” by the German Research Foundation  (DFG, Deutsche Forschungsgemeinschaft). Within the TR172, LIM together with the collaboration partners (Universities of Cologne and Bremen, TROPOS and Alfred Wegener Institute) aim to better observe, understand, and simulate processes leading to the current drastic climate changes in the Arctic.

Qualification requirements

For the PhD positions (1) (2) we expect strong interest in atmospheric science, in particular in cloud physics, remote sensing, radiative transfer, and climate. Applicants should have a Master in Meteorology or a related field. Experience in high-level scientific programming for data analysis is desirable. Experience in cloud, aerosol, and/or radiation physics and atmospheric modelling would be advantageous for position (2) , and scientific programming (Fortran, python) as well as experience with Unix/Linux is required for these positions. Candidates must possess excellent communication skills in written and spoken English.

The postdoctoral positions (3) – (4) are appointed primarily for research. We expect experiences in either or both, observations and/or modelling of clouds and remote sensing of clouds. Applicants must hold a doctoral degree in Meteorology, Physics, or Geophysics. Experience in scientific programming (Matlab, Python, IDL), preferably in a UNIX/LINUX environment, and knowledge in handling of big-data programming is desirable. Candidates must possess excellent communication skills in written and spoken English.

Details on the individual projects are given in the following PDF document.

Terms of employment

The PhD positions (1) – (2) (65% TV-L E13) are awarded for 3 years with possible extension to up to four years. The positions are open starting from January 2020. We offer a productive and interdisciplinary working group including comprehensive supervision and integration into the thriving Leipzig Graduate School on Clouds, Aerosol and Radiation (http://www.lgs-car.tropos.de/).

The positions (3) – (4) (100% TV-L E13) are awarded for up to 4 years, they are also open starting from January 2020. We offer a productive and interdisciplinary working atmosphere including several possibilities for career development.

Applications

Interested candidates should send a cover letter describing background; a CV, training and research interests; certificates; and the contact information of two referees as a single PDF to

m.brueckner[at]uni-leipzig.de.

Please clearly indicate which position(s) you apply for. Review of applications will begin immediately and continue until the positions have been filled.

Selection

The selection for the position will be based solely on scientific merit without regard to gender, religion, national origin, political affiliation, marital or family status or other differences. Among equally qualified candidates, handicapped candidates will be given pref

Notes on the Data Protection

By sending us your application documents you consent to the processing of the data contained within for the purpose of the selection process for the advertised position. You can revoke your consent at any time. The processing takes place exclusively for this selection process and is carried out on the basis of Article 6 of the GDPR (General Data Protection Regulation). This includes passing on data to the members of the selection committee, the HR office, the Commissioner for Equal Opportunities, the Representative Body for Severely Disabled Employees and the Staff Council as part of their organizational or legal responsibilities. Your data will be stored for a maximum of 6 months following completion of the selection process and subsequently deleted.

In accordance with the GDPR you have the right to receive information from the recipient of the application about your personal data, the right to correction, deletion or restriction of processing, as well as a right to object to processing.

If you have any questions, please contact the Leipzig University data protection officer (Mr Thomas Braatz, Augustusplatz 10, 04109 Leipzig, Tel.: 0341-9730081).

AC3 Positions Phase II LIM
AC3 Positions Phase II LIM
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