Dr. Valentin Ludwig

University of Bremen
Institute of Environmental Physics
Otto-Hahn-Allee 1, 28359 Bremen, Germany
Building NW1, office N3200, phone +49-421-218-62172
email: vludwig(at)uni-bremen.de

Other webpages:

http://www.marum.de/en/Valentin_Simon_Ludwig.html

https://www.marum.de/Page9632.html

Publications

Ludwig, V., Spreen, G., Pedersen, L.T.: Evaluation of a New Merged Sea-Ice Concentration Dataset at 1 km Resolution from Thermal Infrared and Passive Microwave Satellite Data in the Arctic. Remote Sens. 2020, 12, 3183, doi.org/10.3390/rs12193183

Ludwig, V., Spreen, G., Haas, C., Istomina, L., Kauker, F., and Murashkin, D.: The 2018 North Greenland polynya observed by a newly introduced merged optical and passive microwave sea-ice concentration dataset, The Cryosphere, 13, 2051–2073, doi.org/10.5194/tc-13-2051-2019, 2019.

Shi, Q., Su, J., Heygster, G., Shi, J., Wang, L., Zhu, L., Lou, Q. and Ludwig, V. (2020). Step-by-Step Validation of Antarctic ASI AMSR-E Sea-Ice Concentrations by MODIS and an Aerial Image. IEEE Transactions on Geoscience and Remote Sensing. doi.org/10.1109/TGRS.2020.2989037

Curriculum Vitae

Valentin Ludwig graduated from High School in Tübingen in 2009. After half a year's volunteer work in Quito, Ecuador he started his academic career by studying Geophysics and Oceanography in Hamburg, where he received his B. Sc. in 2013. He stayed in Hamburg and received his M. Sc. in Integrated Climate System Science in 2016. Between 2012 and 2016, he recieved a scholarship for excellent grades and outstanding social commitment of the german Friedrich-Ebert-Stiftung. Since April 2016, he works as PHD student under supervision of Dr. Gunnar Spreen in the Junior Research Group.

His bachelor's thesis focused on the sea ice concentration retrieval from the low-frequency (1.4 GHz) passive microwave satellite SMOS (Soil Moisture and Ocean Salinity). In his master's thesis, he compared these results to those of another 1.4 GHz satellite, SMAP (Soil Moisture Active Passive). During a 6-week stay on Svalbard, he acquired field work experience in the course "Remote Sensing of the Cryosphere". In his PhD thesis, he continued working on sea ice concentration retrieval from satellite data. He developed a method to consistently combine different types of measurements (thermal infrared and passive microwave) to get a merged product which benefits from all the advantages of the single datasets and is thus more than the sum of its parts. After his graduation in December 2020, he now works as a postdoc on extending the so-obtained dataset by including visible data in summer.


Apart from the amazing topic of sea ice remote sensing, he is interested in the various implications of our changing climate: What will an ice-free Arctic in summer mean for the local population? How will the Arctic be affected if it is used as a shipping route? How will the large-scale ocean circulation change? What can we as individuals do to influence the future development of our planet? Other than that, he is member of the ArcTrain blogging team: arctrain.de

Conferences

09/2019: ArcTrain annual meeting, Rimouski, Canada. Poster "The 2018 North Greenland polynya observed by a newly introduced merged optical and passive microwave sea-ice concentration dataset"

11/2018: ArcTrain annual meeting, Jouvence, Canada. Poster "Using a 1km resolution merged sea ice concentration dataset to investigate the February 2018 North Greenland polynya"

12/2017: AGU fall meeting, New Orleans, USA. Talk "More than the sum of its parts? A merged product from MODIS and AMSR2 sea ice concentrations"

09/2017: ArcTrain annual meeting, Bremen. Poster "Sea ice concentration from merged passive microwave,
optical and SAR observations"

09/2017: ArcTrain annual meeting, Bremen. Talk "Merged Sea Ice Concentration at 1 km resolution from different satellite products"

03/2017:First (AC)³ Science Conference on Arctic Amplification, Bremen. Poster "Sea ice concentrations at 1 km resolution from combined optical and passive microwave data"

03/2017: DPG spring meeting, Bremen. Talk "Sea ice concentrations at 1 km resolution from combined optical and passive microwave data"

11/2016: FAMOS, Woods Hole, USA. Poster presentation "Towards a merged sea ice concentration product
at 1 km resolution from passive microwave and optical observations"

09/2016: ArcTrain annual meeting, Banff, Canada. Talk "Towards a high-resolution product from merged passive microwave and optical sea ice concentrations - why should one care?"

10/2014: REKLIM conference, Berlin. Poster presentation "Retrieving Sea Ice Concentrations from 1.4 GHz brightness temperatures"

03/2014: DPG annual meeting, Berlin. Poster presentation "Sea ice concentration retrieved from L-band data"

 


Working experience

07/2015 - 01/2016 Student assistant at the Max-Planck-Institute, working group ’Sea Ice in the Earth System’, Hamburg, development of a satellite simulator to improve understanding of satellite sea ice observations.

06/2014 Participation in cruise P471 on the research vessel FS Poseidon, Funchal, Azores - Reykjavik, Iceland,preparation, realisation and analysis of CTD, UCTD, ADCP and Thermosal measurements.

04/2013 - 11/2015 Student assistant at the University of Hamburg, Institute for Oceanography, working group ’Sea Ice Remote Sensing’, Hamburg, exploring the usability of SMOS and SMAP satellite observations for sea ice remote sensing.

05/2012 - 03/2013 Student assistant at the University of Hamburg, Institute for Oceanography, working group Experimental Oceanography, Hamburg, processing and visualization of Argo Float data.

Theses

12/2021 Ph.D. thesis "A 1 km sea-ice concentration dataset from merged thermal infrared and microwave radiometer satellite observations: More than the sum of its parts", Reviewers: Dr. Gunnar Spreen, Dr. Leif Toudal Pedersen

11/2015 M. Sc. thesis "Comparison of SMOS and SMAP satellite sea ice concentrations derived from 1.4 GHz brightness
temperatures", Reviewers: Prof. Dr. Lars Kaleschke, Dr. habil. Aike Beckmann.

11/2013: B. Sc. thesis  "Determination of sea ice concentration during summer using 1.4 GHz brightness temperatures", Reviewers: Prof. Dr. Lars Kaleschke, Prof. Dr. Detlef Stammer

Memberships

ArcTrain (https://www.marum.de/ArcTrain.html), German-Canadian graduate school: Associated PhD student

DPG (Deutsche Physikalische Gesellschaft): Member