Jonni Lehtiranta

Researcher

in Polar Oceanography and Sea Ice group at the Finnish Meteorological Institute
Interests include physical modelling of sea ice dynamics and remote sensing of sea ice motion
M.Sc. in tech, 2013, Aalto University

email: jonni.lehtiranta ät fmi.fi
phone: +358 400 453 703


Codes

jlicemotion_20141031.zip: The GPU accelerated optical flow code written for sea ice motion estimation purposes using the maximal cross-correlation algorithm. This code was used to produce the results for the author's manuscript "Comparing C- and L- band SAR images for sea ice motion estimation", submitted for publication in The Cryosphere.

Publications

Lehtiranta, J., Lensu, M., Kokkonen, I. and Haapala, J., 2017. Ensemble sea ice forecast for predicting compressive situations in the Baltic Sea. In EGU General Assembly Conference Abstracts (Vol. 19, p. 19531).

Ronkainen, I., Lehtiranta, J., Lensu, M., Rinne, E., Hordoir, R. and Haapala, J., 2017. Variability of the volume and thickness of sea ice in the Bay of Bothnia. In EGU General Assembly Conference Abstracts (Vol. 19, p. 19527).

Tuomi, L. and Lehtiranta, J., 2016. High-resolution wave forecasting system for the seasonally ice-covered Baltic Sea. In EGU General Assembly Conference Abstracts (vol. 18, p. 15456).

Lensu, M., Kujala, P., Kulovesi, J., Lehtiranta, J., and Suominen, M., 2015. Measurements of Antarctic sea ice thickness during the ice transit of S.A. Agulhas II. In Proceedings of the International Conference on Port and Ocean Engineering Under Arctic Conditions.

Lehtiranta, J., Siiriä, S., & Karvonen, J., 2015. Comparing C-and L-band SAR images for sea ice motion estimation. The Cryosphere, 9(1), 357-366.

Eriksson, P. B., Lensu, M., Haapala, J., & Lehtiranta, J., 2015. Improving Ice Pressure Forecasting for Operational Purposes. In OTC Arctic Technology Conference. Offshore Technology Conference.

Kulovesi, J. and Lehtiranta, J., 2014. Level ice thickness measurement using ship-based semi-automatic computer vision, Proceedings of 22nd IAHR Int. Symposium on Ice, Singapore, August 11-15, 2014.

Suominen, M., Kulovesi, J., Lensu, M., Lehtiranta, J., Kujala, P., 2014. A Comparison of shipborne methods for ice thickness determination, Proceedings of 22nd IAHR Int. Symposium on Ice, Singapore, August 11-15, 2014.

Lensu, M., Haapala, J., Lehtiranta, J., Eriksson, P., Kujala, P., Suominen, M., ... & Lilover, M. J., 2013. Forecasting of Compressive Ice Conditions. In Proceedings of the International Conference on Port and Ocean Engineering Under Arctic Conditions.

Leisti, H., Kaups, K., Lehtiranta, J., Lindfors, M., Suominen, M., Lensu, M., ... & Kouts, T., 2011. Observations of ships in compressive ice. In Proceedings of the International Conference on Port and Ocean Engineering Under Arctic Conditions (No. POAC11-139).

Karvonen, J., Similä, M., & Lehtiranta, J., 2007. Sar-based estimation of the baltic sea ice motion. In Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International (pp. 2605-2608). IEEE. [PDF]

Karvonen, J., Haapala, J., Lehtiranta, J., & Seinä, A., 2007. Polarview@ FIMR: WWW-based delivery of Baltic sea ice products to end-users. In Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International (pp. 1242-1245). IEEE.

Links

Finnish Meteorological Institute
Antload wiki
Ocean modelling, by J. Kämpf