CV Juha Lemmetyinen

Title Group leader (Cryosphere processes and satellite observations)

Contact firstname.lastname@fmi.fi

Postal address P.O.Box 503, FI00101, Helsinki, Finland

Street address Erik Palmenin Aukio 1, FI-00560, Helsinki Finland

Phone number +358 40 7303663

Fields of expertise

  • Passive microwave remote sensing of snow cover and other natural media
  • SAR applications for snow cover monitoring
  • Experimental campaigns in field of microwave remote sensing

Projects

  • ESA/STSE Pathfinders (Combined use of multifrequency radiometry and SAR imagery for enhanced monitoring of terrestrial cryosphere processes), 2014 -
  • ESA/NoSREx (Nordic Snow Radar Experiment), 2009-2013
  • ESA/Synergy of CoReH2O SAR and passive microwave radiometry, 2010-2012
  • TEKES/KaraX (sea ice properties in the Barents and Kara Seas): 2010-2012
  • TEKES/FloodFore (multisource Flood Forecasting), 2010-2012

University and other degrees

  • D. Sc. (Tech.), Aalto University, School of Electrical Engineering, 2012
  • M. Sc. (Tech.), Helsinki University of Technology (TKK), 2004

Previous professional appointments

  • Finnish Meteorological Institute, Scientist, 2008-2013
  • Helsinki University of Technology, Researcher, 2005-2007
  • Helsinki University of Technology, Research Associate, 2001-2004

List of publications

  1. Leppänen, L., A. Kontu, J. Vehviläinen, J. Lemmetyinen, and J. Pulliainen. (in press). Comparison of traditional and optical grain size field measurements with SNOWPACK simulations in a taiga environment. J. Glaciol.
  2. Lemmetyinen, J., Derksen, C., Toose, P., Proksch, M., Pulliainen, J., Kontu, A., Rautiainen, K., Seppänen, J., and Hallikainen, M. (in press). Simulation of spatially varying snow cover brightness temperature using HUT snow emission model and retrieval of a microwave effective grain size. Remote Sens. Environ.
  3. Chang, W., S. Tan, J. Lemmetyinen, L. Tsang, X. Xu, X., S. Yueh (in press). Dense Media Radiative Transfer Applied to SnowScat and SnowSAR. IEEE J Selected T.  App. Earth Obs. Remote Sens., vol.PP, no.99, pp.1,15 doi: 10.1109/JSTARS.2014.2343519
  4. Schwank, M., Rautiainen, K., Mätzler, C., Stähli, M., Lemmetyinen, J., Pulliainen, J., Vehviläinen, J., Kontu, A., Ikonen, J., Bauduin-Ménard, C., Drusch, M., Wiesmann, A., & Wegmüller, U., 2014. Model for Microwave Emission of a Snow-Covered Ground with Focus on L Band. Remote Sens. Environ. 154: 180-191
  5. Kang, K.-K., C.R. Duguay, J. Lemmetyinen, Y. Gel, 2014. Estimation of ice thickness on large northern lakes from AMSR-E brightness temperature measurements, Remote Sens. Environ., 150: 1-19.
  6. Derksen, C., J. Lemmetyinen, P. Toose, A. Silis, J. Pulliainen, and M. Sturm, 2014. Physical properties of Arctic versus subarctic snow: Implications for high latitude passive microwave snow water equivalent retrievals. J. Geophys. Res. Atmos., 119: 7254-7270.
  7. Rutter, N., M. Sandells, C. Derksen, P. Toose, A. Royer, B. Montpetit, A. Langlois, J. Lemmetyinen, and J. Pulliainen, 2014. Snow stratigraphic heterogeneity within ground-based passive microwave radiometer footprints: Implications for emission modelling. J. Geophys. Res. – Earth Surf., 119(3): 550-565.
  8. Kontu, A.; Lemmetyinen, J.; Pulliainen, J.; Seppänen, J.; Hallikainen, M.T., 2014. Observation and modeling of the microwave brightness temperature of snow-covered frozen lakes and wetlands. IEEE Trans. Geosci. Remote Sens., 52(6): 3275-3288 doi: 10.1109/TGRS.2013.2272077.
  9. Rautiainen, K., J. Lemmetyinen, M. Schwank, A. Kontu, C. Ménard, C. Mätzler, M. Drusch, A. Wiesmann, J. Ikonen, and J. Pulliainen. 2014. Detection of soil freezing from L-band passive microwave observations. Remote Sens. Environ., 147: 206–218.
  10. Rautiainen K., J. Lemmetyinen, J. Pulliainen, J. Vehviläinen, M. Drusch, A. Kontu, J. Kainulainen, and J. Seppänen, 2012. L-band radiometer observations of soil processes in boreal and subarctic environments. IEEE Trans. Geosci. Remote Sens. 50(5): 1483-1497.
  11. Derksen, C., P. Toose, J. Lemmetyinen, J. Pulliainen, A. Langlois, N. Rutter, M.C. Fuller, 2012. Evaluation of passive microwave brightness temperature simulations and snow water equivalent retrievals through a winter season. Remote Sens. Environ., 117: 236-248.
  12. Takala M., K. Luojus, J. Pulliainen, C. Derksen, J. Lemmetyinen, J-P. Kärnä, J. Koskinen, and B. Bojkov, 2011. Estimating northern hemisphere snow water equivalent for climate research through assimilation of space-borne radiometer data and ground-based measurements. Remote Sens. Environ., 115(12): 3517-3529.
  13. Lemmetyinen, J., A. Kontu, J-P. Kärnä, J. Vehviläinen, M. Takala, and J. Pulliainen, 2011. Correcting for the influence of frozen lakes in satellite microwave radiometer observations through application of a microwave emission model. Remote Sens. Environ., 115(12): 3695-3706.
  14. Kainulainen, J., K. Rautiainen, J. Lemmetyinen, M. Hallikainen, F. Martin-Porqueras, M. Martin-Neira, 2011. Detection of sea surface salinity gradient using data sets of airborne synthetic aperture radiometer HUT-2D and a GNSS-R instrument. IEEE Trans. Geosci. Remote Sens., 49(11): 4561-4571.
  15. Kainulainen, J., K. Rautiainen, J. Lemmetyinen, J. Seppänen, P. Sievinen, M. Takala, and M. Hallikainen, 2011. Experimental study on radiometric performance of synthetic aperture radiometer HUT-2D - measurements of natural targets. IEEE Trans. Geosci. Remote Sens., 49(2): 814-826.
  16. Gunn, G. E., C. R. Duguay, C. Derksen, J. Lemmetyinen, and P. Toose, 2011. Evaluation of the HUT modified snow emission model over lake ice using airborne passive microwave measurements. Remote Sens. Environ., 115(1): 233-244.
  17. Lemmetyinen, J., J. Pulliainen, A. Rees, A. Kontu, Yubao Qiu, and C. Derksen, 2010. Multiple-layer adaptation of HUT snow emission model: comparison with experimental data. IEEE Trans. Geosci. Remote Sens., 48(7): 2781-2794.
  18. Rees, A., J. Lemmetyinen, C. Derksen, J. Pulliainen, and M. English, 2010. Observed and modelled effects of ice lens formation on passive microwave brightness temperatures over snow covered tundra. Remote Sensing of Environment, 114(1):116-126.
  19. Kainulainen, J., Lemmetyinen, J., Rautiainen, K., Colliander, A., Uusitalo, J., and J. Lahtinen, 2009. Error propagation in calibration networks of synthetic aperture radiometers, IEEE Trans. Geosci. Remote Sens., 47(9): 3140-3150.
  20. Lemmetyinen J., C. Derksen, J. Pulliainen, W. Strapp, P. Toose, A. Walker, S. Tauriainen, J. Pihlflyckt, J-P. Kärnä, and M. Hallikainen, 2009. A comparison of airborne microwave brightness temperatures and snowpack properties across the boreal forests of Finland and western Canada. IEEE Trans. Geosci. Remote Sens., 47(3): 965-978.
  21. Lemmetyinen, J., J. Uusitalo, J. Kainulainen, K. Rautiainen, N. Fabritius, M. Levander, V. Kangas, H. Greus, J. Pihlflyckt, A. Kontu, S. Kemppainen, A. Colliander, M.T. Hallikainen, and J. Lahtinen, 2007. SMOS calibration subsystem. IEEE Trans. Geosci. Remote Sens., 45(11): 3691-3700.
  22. Colliander, A., Lahtinen, J., Tauriainen, S., Pihlflyckt, J., Lemmetyinen, J., and M . Hallikainen, 2007. Sensitivity of airborne 36.5-GHz polarimetric radiometer's wind-speed measurements to indidence angle. IEEE Trans. Geosci. Remote Sens., 45(7): 2122-2129.