Bayi Glacier in Qilian Mountain, China (Credit: Xiaoming Wang, distributed via

Job advertisement Postdoc Data Assimilation at High Resolution to Exploit Nitrogen Chemical Compound Observations from Space in the Netherlands

EGU logo

European Geosciences Union

Postdoc Data Assimilation at High Resolution to Exploit Nitrogen Chemical Compound Observations from Space in the Netherlands

Postdoc Data Assimilation at High Resolution to Exploit Nitrogen Chemical Compound Observations from Space in the Netherlands

Delft University of Technology logo

Delft University of Technology

The position is located within the department of Geoscience and Remote Sensing (GRS). We seek to advance the understanding of dynamic processes on—and human interaction with—Earth, with a focus on geodesy and atmospheric sciences. The approach is based on the development of observation technology as well as the modelling of processes. Our ambition is to create an interdisciplinary research environment in which scientific staff and students explore, learn, and teach. GRS (with about 110 staff members of which 25 faculty staff) conducts a research programme in the disciplines of geodesy, remote sensing, data science, earth-oriented space research, and climate and atmospheric sciences. It focuses on the interrelation between new observational techniques and applications in engineering and geosciences, including the development of space-borne, airborne, and ground-based methods and models. The department has an internationally leading role in research related to 2D and 3D surveying, geodesy, satellite remote sensing, natural hazards, geodynamics and climate studies.

GRS is one of the 7 departments within the Faculty of Civil Engineering and Geosciences (CEG) The Faculty is committed to outstanding international research and education in the field of civil engineering, applied earth sciences, traffic and transport, water technology and delta technology. The research covers global social issues and is closely connected to education as well as the work of a wide range of knowledge institutions. CEG is convinced that Open Science helps to realise these goals and supports its scientists in integrating Open Science in their research practice.


Delft / De Bilt, Netherlands


Relevant division
Atmospheric Sciences (AS)



36270 - 57226 € / Year

Preferred education

Application deadline
20 May 2021

20 April 2021

Job description

We are looking for a post-doctoral researcher with expertise in air pollution or dispersion modelling and/or data assimilation techniques, to join our group at the Atmospheric Science section at the Department of Geoscience and Remote Sensing.

The successful candidate will work on the assimilation of the satellite observations from Tropomi (Tropospheric Monitoring Instrument), which was launched on ESA’s Sentinel-5 precursor satellite in October 2017 as part of the EU Copernicus Earth observation programme, the NASA CrIS instrument and the European series of IASI instruments. Both nitrogen dioxide (NO2) and ammonia (NH3) observations from space will be used.

After establishing the interface between the high-resolution KNMI weather forecast model HARMONIE and the Dutch national air quality model LOTOS-EUROS, modifications will be made in Lotos-Euros to the existing ensemble Kalman filter (LETKF) in close cooperation with TNO Utrecht and other partners. The potential for improvements is investigated to the existing observation operators to assimilate the observations of nitrogen compounds from TROPOMI, CrIS and IASI. Different combinations of satellite data and surface network measurements will be assimilated to study the added value of the satellite measurements. Tools will be developed for performing OSSEs (Observing System Simulation Experiments), also for the benefit of future satellite mission concepts such as NITROSAT.

This project is funded by the Netherlands Space Office. It will be carried out in close collaboration with KNMI for their expertise on Tropomi data and Harmonie model, and further with two postdocs at the partner universities of Free University of Amsterdam (VU) and Wageningen University and Research (WUR). The project is part of the newly established science network on Air Quality research in The Netherlands including universities, national knowledge institutions like KNMI, TNO and RIVM, and other partners in the field of Air Quality research in the Netherlands.

More information can be found on: